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Actualtests.300-101.147.

Real Exam Questions
Number: 300-101
Passing Score: 800
Time Limit: 120 min
File Version: 18.8
300-101
Implementing Cisco IP Routing

From the day one I using Actualtests as my sole exam prep yet sharing this first vce. Passed with 89% you please try too.

Topic 1, Network Principles
Sections
1. Network Principles
2. Layer 2 Technologies
3. Layer 3 Technologies
4. VPN Technologies
5. Infrastructure Security
6. Infrastructure Services
7. Mixed Questions

Exam A
QUESTION 1
Refer to the exhibit.

Based on this FIB table, which statement is correct?
A.
B.
C.
D.

There is no default gateway.
The IP address of the router on FastEthernet is 209.168.201.1.
The gateway of last resort is 192.168.201.1.
The router will listen for all multicast traffic.

Correct Answer: C
Section: Network Principles
Explanation
Explanation/Reference:
Explanation:
The 0.0.0.0/0 route is the default route and is listed as the first CEF entry. Here we see the next hop for this default route lists 192.168.201.1 as the default router
(gateway of last resort).
QUESTION 2
Refer to the exhibit.

A network administrator checks this adjacency table on a router. What is a possible cause for the incomplete marking?
A.
B.
C.
D.

incomplete ARP information
incorrect ACL
dynamic routing protocol failure
serial link congestion

Correct Answer: A
Section: Network Principles
Explanation
Explanation/Reference:
Explanation:
To display information about the Cisco Express Forwarding adjacency table or the hardware Layer 3-switching adjacency table, use the show adjacency command.
Reasons for Incomplete Adjacencies
There are two known reasons for an incomplete adjacency:
The router cannot use ARP successfully for the next-hop interface. After a clear iparp or a clear adjacency command, the router marks the adjacency as incomplete. Then it fails to clear the entry.
In an MPLS environment, IP CEF should be enabeled for Label Switching. Interface lev- el command ip route-cache cef
No ARP Entry
When CEF cannot locate a valid adjacency for a destination prefix, it punts the packets to the CPU for ARP resolution and, in turn, for completion of the adjacency.
Reference: http://www.cisco.com/c/en/us/support/docs/ip/express-forwarding-cef/17812-cef- incomp.html#t4
QUESTION 3
A network engineer notices that transmission rates of senders of TCP traffic sharply increase and decrease simultaneously during periods of congestion. Which
condition causes this?
A.
B.
C.
D.

global synchronization
tail drop
random early detection
queue management algorithm

Correct Answer: A
Section: Network Principles

Explanation
Explanation/Reference:
Explanation:
TCP global synchronization in computer networks can happen to TCP/IP flows during periods of congestion because each sender will reduce their transmission rate
at the same time when packet loss occurs.
Routers on the Internet normally have packet queues, to allow them to hold packets when the network is busy, rather than discarding them.
Because routers have limited resources, the size of these queues is also limited. The simplest technique to limit queue size is known as tail drop. The queue is
allowed to fill to its maximum size, and then any new packets are simply discarded, until there is space in the queue again. This causes problems when used on
TCP/IP routers handling multiple TCP streams, especially when bursty traffic is present. While the network is stable, the queue is constantly full, and there are no
problems except that the full queue results in high latency. However, the introduction of a sudden burst of traffic may cause large numbers of established, steady
streams to lose packets simultaneously.
Reference: http://en.wikipedia.org/wiki/TCP_global_synchronization
QUESTION 4
Which statement about the use of tunneling to migrate to IPv6 is true?
A.
B.
C.
D.

Tunneling is less secure than dual stack or translation.
Tunneling is more difficult to configure than dual stack or translation.
Tunneling does not enable users of the new protocol to communicate with users of the old protocol without dual-stack hosts.
Tunneling destinations are manually determined by the IPv4 address in the low-order 32 bits of IPv4-compatible IPv6 addresses.

Correct Answer: C
Section: Network Principles
Explanation
Explanation/Reference:
Explanation:
Using the tunneling option, organizations build an overlay network that tunnels one protocol over the other by encapsulating IPv6 packets within IPv4 packets and
IPv4 packets within IPv6 packets. The advantage of this approach is that the new protocol can work without disturbing the old protocol, thus providing connectivity
between users of the new protocol. Tunneling has two disadvantages, as discussed in RFC 6144:
· Users of the new architecture cannot use the services of the underlying infrastructure. · Tunneling does not enable users of the new protocol to communicate with
users of the old protocol without dual-stack hosts, which negates interoperability. Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/
enterprise-ipv6- solution/white_paper_c11-676278.html
QUESTION 5
Which three problems result from application mixing of UDP and TCP streams within a network with no QoS? (Choose three.)
A.
B.
C.
D.
E.

starvation
jitter
latency
windowing
lower throughput

Correct Answer: ACE
Section: Network Principles
Explanation
Explanation/Reference:
Explanation:
It is a general best practice not to mix TCP-based traffic with UDP-based traffic (especially streaming video) within a single service provider class due to the
behaviors of these protocols during periods of congestion. Specifically, TCP transmitters will throttle-back flows when drops have been detected. Although some
UDP applications have application-level windowing, flow control, and retransmission capabilities, most UDP transmitters are completely oblivious to drops and thus
never lower transmission rates due to dropping. When TCP flows are combined with UDP flows in a single service provider class and the class experiences
congestion, then TCP flows will continually lower their rates, potentially giving up their bandwidth to drop-oblivious UDP flows. This effect is called TCP-starvation/
UDP-dominance. This can increase latency and lower the overall throughput.
TCP-starvation/UDP-dominance likely occurs if (TCP-based) mission-critical data is assigned to the same service provider class as (UDP-based) streaming video
and the class experiences sustained congestion. Even if WRED is enabled on the service provider class, the same behavior would be observed, as WRED (for the
most part) only affects TCP-based flows. Granted, it is not always possible to separate TCP-based flows from UDP-based flows, but it is beneficial to be aware of
this behavior when making such application-mixing decisions. Reference: http://www.cisco.com/warp/public/cc/so/neso/vpn/vpnsp/spqsd_wp.htm
QUESTION 6
Which method allows IPv4 and IPv6 to work together without requiring both to be used for a single connection during the migration process?
A.
B.
C.
D.

dual-stack method
6to4 tunneling
GRE tunneling
NAT-PT

Correct Answer: A
Section: Network Principles
Explanation
Explanation/Reference:
Explanation:
Dual stack means that devices are able to run IPv4 and IPv6 in parallel. It allows hosts to simultaneously reach IPv4 and IPv6 content, so it offers a very flexible
coexistence strategy. For sessions that support IPv6, IPv6 is used on a dual stack endpoint. If both endpoints support IPv4 only, then IPv4 is used.
Benefits:
· Native dual stack does not require any tunneling mechanisms on internal networks · Both IPv4 and IPv6 run independent of each other
· Dual stack supports gradual migration of endpoints, networks, and applications. Reference: http://www.cisco.com/web/strategy/docs/gov/IPV6at_a_glance_c45625859.pdf
QUESTION 7
A network administrator executes the command clear ip route. Which two tables does this command clear and rebuild? (Choose two.)
A.
B.
C.
D.
E.

IP routing
FIB
ARP cache
MAC address table
Cisco Express Forwarding table

2. C.cisco. C.2 · --The next-hop address next-hop · --The interface to reach the interface next-hop address. Set window scaling to be used on the remote host. The TCP Window Scaling enhancement provides that support. the remote host must also support this feature and its window size must be increased. The TCP Window Scaling feature complies with RFC 1323. prefix/length 10. Routers offer better packet-transfer performance when fast switching is enabled.4t-book/iap-tcp.com/c/en/us/td/docs/ios-xml/ios/ipapp/configuration/12-4t/iap-12.cisco. Execute the command iptcp window-size 65536.) A.com/c/en/us/td/docs/ios/12_2/switch/command/reference/fswtch_r/xrfscmd5. alphanumeric string up to 32 characters. route switch(config)# clear iproute · --Any IP prefix. The window size can increase to a scale factor of 14. use the following commands in any mode: Command Purpose clear iproute {* | Clears one or more routes from both the unicast RIB and all the module FIBs. B.F. Use the iptcp window-size command in global configuration mode to configure the TCP window size. * [vrfvrf-name] Example: · --An individual IP route. Set TCP options to "enabled" on the remote host. The vrf-name can be any case-sensitive.cisco. The larger scalable window size will allow TCP to perform better over LFNs. The window scaling extension in Cisco IOS software expands the definition of the TCP window to 32 bits and then uses a scale factor to carry this 32-bit value in the 16-bit window field of the TCP header. Fast switching is enabled by default on all interfaces that support fast switching. Execute the command iptcpqueuemax. fast switching process switching Cisco Express Forwarding switching cut-through packet switching Correct Answer: A Section: Network Principles Explanation Explanation/Reference: Explanation: Fast switching allows higher throughput by switching a packet using a cache created by the initial packet sent to a particular destination. Correct Answer: AB Section: Network Principles Explanation Explanation/Reference: Explanation: The TCP Window Scaling feature adds support for the Window Scaling option in RFC 1323. Typical applications use a scale factor of 3 when deployed in LFNs. topology table Correct Answer: AB Section: Network Principles Explanation Explanation/Reference: Explanation: To clear one or more entries in the IP routing table.html#GUID-BD998AC6F128-47DD-B5F7-B226546D4B08 Verified QUESTION 10 Which three TCP enhancements can be used with TCP selective acknowledgments? (Choose three. A larger window size is recommended to improve TCP performance in network paths with large bandwidth-delay product characteristics that are called Long Fat Networks (LFNs). Reference: http://www. D.2. TCP Extensions for High Performance . The {route | route options are as follows: prefix/length}[nexthopinterface]} · --All routes. To display the routing table cache used to fast switch IP traffic. B. Execute the command iptcp adjust-mss. Destination addresses are stored in the high-speed cache to expedite forwarding. use the show ip cache EXEC command.) A. Reference: http://www.html QUESTION 8 Which switching method is used when entries are present in the output of the command show ip cache? A.ht ml#wp1038133 QUESTION 9 Which two actions must you perform to enable and use window scaling on a router? (Choose two. In order for this to work. header compression . Reference: http://www.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/unicast/5_0_3_N1_1/Ci sco_n5k_layer3_ucast_cfg_rel_503_N1_1/l3_manage-routes. D. E.

2. and retransmission capabilities. TCP header compression will not compress the outgoing packet. Only packets 4 and 7 must be re-sent. but such re-sent segments might have already been successfully received. The benefit of this feature is the reduction of delay and packet loss in data transmissions. one-way latency.3s/asr1000/iap-xe-3s-asr1000-book/iap-tcp. and connectivity tests. C. This effect is called TCP starvation/UDP dominance. potentially giving up their bandwidth to UDP flows that are oblivious to drops. most UDP transmitters are completely oblivious to drops and. Packets 4 through 8 would need to be re-sent.845 UTC Thu Feb 3 2005 Latest operation return code: OK RTT Values: Number Of RTT: 10 RTT Min/Avg/Max: 1/1/1 milliseconds Latency one-way time: Number of Latency one-way Samples: 0 Source to Destination Latency one way Min/Avg/Max: 0/0/0 milliseconds Destination to Source Latency one way Min/Avg/Max: 0/0/0 milliseconds Reference: http://www. TCP Time Stamp The TCP time-stamp option provides improved TCP round-trip time measurements. and 8. when TCP traffic is in the same class as UDP when UDP flows are assigned a lower priority queue when WRED is enabled when ACLs are in place to block TCP traffic Correct Answer: A Section: Network Principles Explanation Explanation/Reference: Explanation: Mixing TCP with UDP It is a general best practice to not mix TCP-based traffic with UDP-based traffic (especially Streaming-Video) within a single service-provider class because of the behaviors of these protocols during periods of congestion. thus. Although some UDP applications have application-level windowing. In other words. B. The TCP selective acknowledgment mechanism helps improve performance. 2. Specifically. E. TCP would receive acknowledgment of only packets 1. a TCP sender could learn about only one lost packet per-round-trip time. and 3.html#GUID-22A82C5F-631F-43909838. The receiving TCP host returns selective acknowledgment packets to the sender. TCP selective acknowledgment is used only when multiple packets are dropped within one TCP window. D. web browsing. 6.com/en/US/technologies/tk648/tk362/tk920/technologies_white_paper09186a0 0802d5efe. the device sends a TCP keepalive packet to the peer with only the Acknowledgment (ACK) flag turned on. latency starvation connectionless communication nonsequencing unordered packets jitter Correct Answer: A Section: Network Principles Explanation Explanation/Reference: Explanation: Cisco IOS IP SLAs provides a proactive notification feature with an SNMP trap. average jitter. E. To allow TCP header compression over a serial link. Reference: http://www. Which UDP characteristic does this scenario describe? A. explicit congestion notification keepalive time stamps TCP path discovery MTU window Correct Answer: BCD Section: Network Principles Explanation Explanation/Reference: Explanation: TCP Selective Acknowledgment The TCP Selective Acknowledgment feature improves performance if multiple packets are lost from one TCP window of data.cisco. C. TCP Keepalive Timer The TCP Keepalive Timer feature provides a mechanism to identify dead connections. Use the iptcpecn command in global configuration mode to enable TCP ECN. D. Prior to selective acknowledgment.com/c/en/us/td/docs/ios-xml/ios/ipapp/configuration/xe. F. Here is a partial sample output from the IP SLA statistics that can be seen: router#showipsla statistics 1 Round Trip Time (RTT) for Index 55 Latest RTT: 1 ms Latest operation start time: *23:43:31. Use the iptcp selective-ack command in global configuration mode to enable TCP selective acknowledgment. MOS. flow control. Prior to this feature. With selective acknowledgment. C.B. Use the iptcp timestamp command to enable the TCP time-stamp option. D. informing the sender of data that has been received.html QUESTION 12 Under which condition does UDP dominance occur? A. Cisco IOS IP SLAs generates an SNMP trap to alert management applications if this threshold is crossed. Because the time stamps are always sent and echoed in both directions and the time-stamp value in the header is always changing. It also provides enhanced support for TCP sessions associated with applications. never lower transmission rates because of dropping. Each measurement operation can monitor against a pre-set performance threshold. B. An aggressive sender could choose to resend packets early. jitter. If a response packet (a TCP ACK packet) is not received after the device sends a specific number of probes. There is no performance impact when the feature is enabled but not used. TCP Explicit Congestion Notification The TCP Explicit Congestion Notification (ECN) feature allows an intermediate router to notify end hosts of impending network congestion. if TCP lost packets 4 and 7 out of an 8-packet window. and transfer of audio and video data that are sensitive to delay or packet loss. When TCP flows are combined with UDP flows within a single service-provider class and the class experiences congestion. 3. When a TCP connection on a routing device is idle for too long. . TCP transmitters throttle back flows when drops are detected. the receiver can acknowledge packets received out of order.F2E48FFEEA01 QUESTION 11 A network administrator uses IP SLA to measure UDP performance and notices that packets on one router have a higher one-way delay compared to the opposite direction. The sender can then resend only missing data segments (instead of everything since the first missing packet). TCP receives acknowledgment of packets 1. because of limited information available from cumulative acknowledgments. 5. such as Telnet. Refer to RFC 2018 for more details about TCP selective acknowledgment. TCP flows continually lower their transmission rates.cisco. Several SNMP traps are available: round trip time. packet loss. the TCP time-stamp option is disabled. the connection is considered dead and the device initiating the probes frees resources used by the TCP connection.

Router(config)# vpdn-group group1 Step 5 request-dialin Creates a request-dialin VPDN Example: subgroup. Router(config)# vpdn enable Step 4 vpdn-groupname Associates a VPDN group with a Example: customer or VPDN profile. Example: Router# configure terminal Step 3 vpdn enable Enables virtual private dialup Example: networking. Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Enabling PPPoE in a VPDN Group Perform this task to enable PPPoE in a virtual private dial-up network (VPDN) group. the connection is still brought up and set as persistent. configureterminal 3. The command provides a default timer interval. Enable QoS FIFO for PPPoE support. vpdn-groupname 5.2(13)T. Even if WRED is enabled on the service-provider class.cisco. If interesting traffic arrives before the timer expires. protocolpppoe DETAILED STEPS Command or Action Purpose Step 1 enable Enables privileged EXEC mode.html Topic 2. Restrictions This task applies only to releases prior to Cisco IOS Release 12. Disable CDP on the interface. request-dialin 6. Layer 2 Technologies QUESTION 13 Prior to enabling PPPoE in a virtual private dialup network group. Which feature can be used to accomplish this task? A.html QUESTION 14 A corporate policy requires PPPoE to be enabled and to maintain a connection with the ISP.TCP starvation/UDP dominance likely occurs if (TCP-based) Mission-Critical Data is assigned to the same service-provider class as (UDP-based) Streaming-Video and the class experiences sustained congestion. SUMMARY STEPS 1. Step 2 Router(config-if)# ip Specifies the IP address and mask addressaddress mask of the dialer interface as a node in the destination network to be . C. the same behavior would be observed because WRED (for the most part) manages congestion only on TCP-based flows. B. TCP Adjust Dialer Persistent PPPoE Groups half-bridging Peer Neighbor Route Correct Answer: B Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: A new interface configuration command.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS. Step 2 configureterminal Enters global configuration mode.cisco. even if no interesting traffic exists. To configure a dialer interface as persistent. vpdn enable 4. C. which task must be completed? A. Reference: http://www. D. enable 2. or you can set a custom timer interval. · Example: Enter your password if Router> enable prompted. When configured. dialer persistent. E. Execute the no switchport command. the dialer persistent command starts a timer when the dialer interface starts up and starts the connection when the timer expires.SRND-Book/VPNQoS. B. Execute the vpdn enable command. allows a dial-on-demand routing (DDR) dialer profile connection to be brought up without being triggered by interesting traffic. Router(config-vpdn)# requestdialin Step 6 protocol pppoe Enables the VPDN subgroup to Example: establish PPPoE Router(config-vpdn-reqin)# protocol pppoe Reference: http://www.com/en/US/docs/ios/12_2t/12_2t2/feature/guide/ftpppoec_support_TSD_Island _of_Content_Chapter. D. use the following commands beginning in global configuration mode: Command Purpose Step 1 Router(config)# interface dialer Creates a dialer interface and number enters interface configuration mode.

C.ht ml QUESTION 16 Which PPP authentication method sends authentication information in cleartext? A. When the remote device receives the challenge packet. on the other hand. Step 3 Router(config-if)# encapsulation Specifies the encapsulation type. in combination with PPPoE. the host sends a "challenge" message to the remote node. it concatenates the ID.called. When the access server receives the response. the table is then used to supply the next-hop protocol . along with the name associated with the password used in the encryption process. The host checks the response against its own calculation of the expected hash value. CHAP authentication.com/c/en/us/support/docs/wan/point-to-point-protocol-ppp/10241. periodically verifies the identity of the remote node using a three-way handshake. The remote node responds with a value calculated using a one-way hash function. C. Frame Relay inverse ARP static DLCI mapping Frame Relay broadcast queue dynamic DLCI mapping Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Dynamic address mapping uses Frame Relay Inverse ARP to request the next-hop protocol address for a specific connection. The benefit of using CHAP authentication is that the remote device's password is never transmitted in clear text (encrypted). the two authentication options are PAP and CHAP. C. Step 8 Router(config-if)# dialer remote. the access server sends a CHAP packet to the remote device.html QUESTION 17 Which protocol uses dynamic address mapping to request the next-hop protocol address for a specific connection? A. PAP authentication does not provide any protection against playback and line sniffing. Reference: http://www. Responses to Inverse ARP requests are entered in an address-to-DLCI mapping table on the router or access server.cisco. The CHAP packet requests or "challenges" the remote device to respond. it uses the name it received to retrieve a password stored in its user database. and the random number. B.cisco.html QUESTION 15 A network engineer has been asked to ensure that the PPPoE connection is established and authenticated using an encrypted password. D. If the values match. D. B. the authentication is acknowledged. The remote device sends the results back to the access server.number or by protocol and list name{permit | deny | list accessnumber to define the interesting list-number} packets that can trigger a call. Step 5 Router(config-if)# dialer pool Specifies the dialing pool to use number for calls to this destination. E.(Optional) Specifies the name user-name authentication name of the remote router on the destination subnetwork for a dialer interface. After the PPP link is established. B. the connection is terminated. The retrieved password should be the same password the remote device used in its encryption process. authentication succeeds. This prevents other devices from stealing it and gaining illegal access to the ISP's network.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathen. even in | max-attemptsnumber] the absence of interesting traffic. the remote device's password. type Step 4 Router(config-if)# dialer string Specifies the remote destination dial-string class class-name to call and the map class that defines characteristics for calls to this destination.Assigns the dialer interface to a groupgroup-number dialer group. hence. otherwise. MS CHAP CDPCP CHAP PAP Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PAP authentication involves a two-way handshake where the username and password are sent across the link in clear text.cisco. Reference: http://www.com/c/en/us/td/docs/ios/dial/configuration/guide/12_4t/dia_12_4t_book/dia_dia ler_persist. a random number. D. PAP dot1x IPsec CHAP ESP Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: With PPPoE. Step 6 Router(config-if)# dialer. Step 9 Router(config-if)# dialer Forces a dialer interface to be persistent [delay [initial] seconds connected at all times. and then encrypts all of it using the remote device's password. Which technology. Step 7 Router(config-if)# dialer-list Specifies an access list by list dialer-group protocol protocol. The challenge packet consists of an ID. The access server then encrypts the concatenated information with the newly retrieved password--if the result matches the result sent in the response packet. given its known DLCI. When CHAP is enabled on an interface and a remote device attempts to connect to it. and the host name of the local router. can be used for authentication in this manner? A.ppp-callin-hostname. Reference: http://www.

PPPoE functions as a Layer 2 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers.0. Once the link setup is completed. PPPoE functions as a Layer 2 encapsulation method that allows data to be encrypted over the PPP link within PPPoE headers.0. B.cisco. Traffic from the 172. Once the link setup is completed. PPP options are negotiated and authentication is performed. B. Once the link setup is completed.0. C.com/c/en/us/td/docs/security/asa/asa92/configuration/vpn/asa-vpn.com/c/en/us/td/docs/ios/12_2/wan/configuration/guide/fwan_c/wcffrely. Layer 3 Technologies QUESTION 20 Refer to the exhibit. D.22. Reference: http://www.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13693. . Reference: http://www.0.16. 10 20 30 40 Correct Answer: A Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: Before you troubleshoot any OSPF neighbor-related issues on an NBMA network. called an access concentrator.0/16 network will be blocked by the ACL.html Topic 3. PPP options are not negotiated and authentication is performed. the PPPoE client locates a PPPoE server. allowing data to be transferred over the PPP link within PPPoE headers. PPPoE functions as a Layer 4 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers. D.cli/vpn-pppoe. PPPoE functions as a Layer 2 encapsulation method.html QUESTION 19 Which statement is true about the PPP Session Phase of PPPoE? A. C.html QUESTION 18 What is the default OSPF hello interval on a Frame Relay point-to-point network? A. PPP Session Phase--In this phase. a Session ID is assigned and the PPPoE layer is established. PPPoE functions as a Layer 3 encapsulation method that allows data to be transferred over the PPP link within PPPoE headers. Which one statement is true? A. PPP options are negotiated and authentication is performed. Once the link setup is completed.cisco. During this phase. PPP options are negotiated and authentication is not performed. Once the link setup is completed. B. it is important to remember that an NBMA network can be configured in these modes of operation with the ipospf network command: Point-to-Point Point-to-Multipoint Broadcast NBMA The Hello and Dead Intervals of each mode are described in this table: Hello Interval Dead Interval Network Type (secs) (secs) Point-to-Point 10 40 Point-to-Multipoint 30 120 Broadcast 10 40 Non-Broadcast 30 120 Reference: http://www. PPP options are automatically enabled and authorization is performed.0/8 network will not be advertised by Router B because the network statement for the 10.0. Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PPPoE is composed of two main phases: Active Discovery Phase--In this phase.address or the DLCI for outgoing traffic.0/8 network is missing from Router B. The 10.cisco.

0/24 cannot successfully ping users on the 10.com/c/en/us/td/docs/security/asa/ asa92/configuration/vpn/asa-vpn. D.0. Once the node verifies that its tentative address is unique on the link.html QUESTION 23 An engineer has configured a router to use EUI-64.0/8 network.cisco.0. The autoconfiguration on the routers stop at this stage. and was asked to document the IPv6 address of the router.0.autoconfiguration QUESTION 22 PPPoE is composed of which two phases? A. the Router Advertisements notify what sort of configurations the hosts need to do and the hosts receive a global unicast IPv6 address. B. as per RFC2373. This feature is a key benefit over IPv4 as it eliminates the need of manual configuration or DHCP as in the world of IPv4.16. During this phase. allows a host to assign iteslf a unique 64-Bit IP Version 6 interface identifier (EUI-64). PPPoE functions as a Layer 2 encapsulation method. C.com/site/amitsciscozone/home/important-tips/ipv6/ipv6-stateless. PPP options are negotiated and authentication is performed. allowing data to be transferred over the PPP link within PPPoE headers. YOU won't know about the route and therefore won't send it to anyone else downstream. The next phase involves obtaining Router Advertisements from routers if any routers are present on the link.168. the address is a duplicate address and must not be used. DHCPv6 request router-advertisement neighbor-solicitation redirect Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Autoconfiguration is performed on multicast-enabled links only and begins when a multicast. If you filter inbound. Once the link setup is completed. Reference: http://www. If no routers are present. D.C. the next neighbor(s) will not know about anything except the 172. hosts and routers) begin the process by generating a link-local address for the interface.168. One example is noted above.cli/vpn-pppoe.0. called an access concentrator. The Mac address is first separated into two 24-bits.google. D.0/8 network will not be in the routing table on Router B. It is formed by appending the interface identifier to wellknown link-local prefix FE80 :: 0. C. QUESTION 21 A router with an interface that is configured with ipv6 address autoconfig also has a link-local address assigned.0/16 route and therefore won't send it to anyone else downstream. a Session ID is assigned and the PPPoE layer is established. E. with one being OUI (Organizationally Unique Identifier) and the other being NIC specific. the node performs the Duplicate Address Detection mechanism to see if any other node is using the same link-local address on the link.0/24 network. Which message is required to obtain a global unicast address when a router is present? A.0. C. Active Authentication Phase and PPP Session Phase Passive Discovery Phase and PPP Session Phase Active Authorization Phase and PPP Session Phase Active Discovery Phase and PPP Session Phase Correct Answer: D Section: Layer 2 Technologies Explanation Explanation/Reference: Explanation: PPPoE is composed of two main phases: Active Discovery Phase--In this phase. the PPPoE client locates a PPPoE server.0007 subnet 2001:DB8:0:1::/64 Which IPv6 addresses should the engineer add to the documentation? A. B. 2001:DB8:0:1:C601:42FF:FE0F:7 2001:DB8:0:1:FFFF:C601:420F:7 2001:DB8:0:1:FE80:C601:420F:7 2001:DB8:0:1:C601:42FE:800F:7 Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Extended Unique Identifier (EUI). The 16bit 0xFFFE is then inserted between these two 24-bits to for the 64-bit EUI address. The routers will need manual configuration (or stateful configuration) to receive site-local or global addresses.0. Nodes (both. Router B will not advertise the 10.0. PPP Session Phase--In this phase. The interface identifier replaces the right-most zeroes of the link-local prefix. it has IP-connectivity to other neighbors on this link.0/8 network can successfully ping users on the 192. further tasks are performed only by the hosts. Reference: https://sites. it assigns that link-local address to the interface. D. Before the link-local address can be assigned to the interface.0/8 network because it is blocked by the ACL. but users on the 192. If you filter outbound. Users on the 10. It does this by sending a Neighbor Solicitation message with target address as the "tentative" address and destination address as the solicited-node multicast address corresponding to this tentative address.0. If routers are present. The router has the following interface parameters: mac address C601.0. manual configuration is required.5. At this stage. If a node responds with a Neighbor Advertisement message with tentative address as the target address. .enabled interface is enabled (during system startup or manually). a stateful configuration is required.5. B. The IPv6 EUI-64 format address is obtained through the 48-bit MAC address. Correct Answer: E Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: You can filter what individual routes are sent (out) or received (in) to any interface within your EIGRP configuration. Hence. IEEE has chosen FFFE as a reserved value which can only appear in EUI-64 generated from the EUI-48 MAC address. The 10.420F.

The reason for inverting can be found in RFC4291 section 2. the seventh bit from the left.cisco. format Errors that can result from checks performed on header fields. or the universal/local (U/L) bit. Reference: http://www. . D.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx. This bit identifies whether this interface identifier is universally or locally administered. The networks were not advertised properly under the OSPFv3 process. autonomous-systemautonomous-system-number no autonomous-systemautonomous-system-number Reference: http://www. routed truncated Number of truncated packets. The global anycast address must be added to the traffic filter to allow OSPFv3 to work properly. C. Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: To configure the autonomous-system number for an Enhanced Interior Gateway Routing Protocol (EIGRP) routing process to run within a VPN routing and forwarding (VRF) instance. OSPFv3 timers were adjusted for fast convergence. B. B. An IPv6 traffic filter is blocking the networks from being learned via the Router B interface that is connected to Router A.Here is an example showing how the Mac Address is used to generate EUI.1. The link-local addresses that were used by OSPFv3 were explicitly denied. B. shortly after implementing the traffic filter. It sets the EIGRP autonomous system number in a VRF.cisco. However. IPv6 unicast routing is not enabled on Router A or Router B. the address is locally administered and if 1.address QUESTION 24 For security purposes.com/document/100566/understanding-ipv6-eui-64-bit.cisco. The traffic filter is blocking all ICMPv6 traffic. it maintains its original scope (global unique address is still global unique and vice versa). when the bit is inverted. Correct Answer: D Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: show ipv6 traffic Field Descriptions Field Description source. The networks that are advertised from Router A do not show up in Router B's routing table.5. the address is globally unique. To remove the autonomous-system for an EIGRP routing process from within a VPN VRF instance.os/unicast/configuration/guide/l3_cli_nxos/l3_ospfv3. It sets the BGP autonomous system number in a VRF. so if any IPv6 traffic filters are implemented be sure to include the link local address so that it is permitted in the filter list. IPv6 traffic filtering can be implemented only on SVIs. C. the globally unique addresses assigned by the IEEE has always been set to 0 whereas the locally created addresses has 1 configured. It sets the global EIGRP autonomous system number. an IPv6 traffic filter was configured under various interfaces on the local router. It sets the global BGP autonomous system number. errors the version number. D.Number of source-routed packets.htm l#wp1062796 QUESTION 26 Router A and Router B are configured with IPv6 addressing and basic routing capabilities using OSPFv3. needs to be inverted. Next.html QUESTION 25 What is the purpose of the autonomous-system {autonomous-system-number} command? A. and packet length. OSPFv3 neighbor adjacencies were lost. What caused this issue? A. which caused the neighbor relationships to fail. If 0. Why is the routing information not being learned by Router B? A. the message "not a router" is found in the output. It is worth noticing that in the OUI portion. Therefore. use the autonomous-system command in address-family configuration mode. After debugging IPv6 packets.com/c/en/us/td/docs/ios/iproute_eigrp/command/reference/ire_book/ire_a1. Reference: https:// supportforums. D. use the no form of this command. C. Correct Answer: C Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: OSPFv3 uses link-local IPv6 addresses for neighbor discovery and other features.

B. Which command only announces the 1. router Reference: http://www.2. the ge 24 term means greater than or equal to a /24 and the le 24 means less than or equal to /24. and the source MAC address and the DHCP client hardware address do not match. This check is performed only if the DHCP snooping MAC address verification option is turned on.3.0. allowing only 1. so the correct command is distribute list 2 out FastEthernet0/0.8.0. This translate to any prefix in the 10.0/24 network out of FastEthernet 0/0? A.0/24. · The switch receives a packet on an untrusted interface. IEEE EUI-64 was implemented when assigning IPv6 addresses on the device. C. C.8.0/16 ge 24 le 24? A. Only the choice of 10.0.0. and the interface information in the binding table does not match the interface on which the message was received.switch ports to accept DHCP packets that include option-82 information. The switch forwards the DHCP packet unless any of the following conditions occur (in which case the packet is dropped): · The switch receives a packet (such as a DHCPOFFER.1.0/24 10.0.8. discover messages DHCP messages where the source MAC and client MAC do not match traffic from a trusted DHCP server to client DHCP messages where the destination MAC and client MAC do not match Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: The switch validates DHCP packets received on the untrusted interfaces of VLANs with DHCP snooping enabled. DHCPACK.html QUESTION 28 Refer to the exhibit. B. which enables untrusted aggregation.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. QUESTION 30 After you review the output of the command show ipv6 interface brief.0/16 10. D. To support trusted edge switches that are connected to untrusted aggregation-switch ports.cisco. DHCPNAK.0. where X is any value in the 0-255 range.0.html QUESTION 27 Which type of traffic does DHCP snooping drop? A. . whereas access list 1 permits all 1.0/24 network.not a Message sent when IPv6 unicast routing is not enabled. 10.3.9.8.0. distribute list 1 out distribute list 1 out FastEthernet0/0 distribute list 2 out distribute list 2 out FastEthernet0/0 Correct Answer: D Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Access list 2 is more specific. or DHCPLEASEQUERY packet) from a DHCP server outside the network or firewall.cisco. C.2SX/configuration/guide/book/snoodhcp.0/8 networks. what do you conclude about these IPv6 addresses? A. Configure the port on the edge switch that connects to the aggregation switch as a trusted port.0/24 10. D.0/23 Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: With prefix lists. · The switch receives a DHCPRELEASE or DHCPDECLINE message from an untrusted host with an entry in the DHCP snooping binding table. · The switch receives a DHCP packet that includes a relay agent IP address that is not 0. The addresses were misconfigured and will not function as intended.0. This question also asks us to apply this distribute list only to the outbound direction of the fast Ethernet 0/0 interface.0. D.com/c/en/us/td/docs/ios/ipv6/command/reference/ipv6_book/ipv6_16. Based on this information.24 matches this. so only a /24 is both greater than or equal to 24 and less than or equal to 24.x.8.2. B. QUESTION 29 Which prefix is matched by the command ip prefix-list name permit 10. you see that several IPv6 addresses have the 16-bit hexadecimal value of "FFFE" inserted into the address. you can enable the DHCP option-82 on untrusted port feature.0. B. Reference: http:// www.8.

B. or the universal/local (U/L) bit. which is statically defined by the network administrator. such as the hop limit and MTU a host should use in packets that it originates Reference: http://www. When an RA is sent in response to a router solicitation. What is the expected acknowledgment and its usage? A.com/document/100566/understanding-ipv6-eui64-bit. Duplicate Address Detection will determine if any other local host is using the same IPv6 address for communication with the IPv6 routers on the segment. E.addrg_bsc_con.cisco.C. If 0. Here is an example showing how a the Mac Address is used to generate EUI. as well as certain data. Next. when the bit is inverted. The 16bit 0xFFFE is then inserted between these two 24-bits to for the 64-bit EUI address. The destination address in router solicitation messages is the all-routers multicast address with a scope of the link.1. The IPv6 universal/local flag (bit 7) was flipped. with one being OUI (Organizationally Unique Identifier) and the other being NIC specific. Router acknowledgment messages will be forwarded upstream. are sent by hosts at system startup so that the host can immediately autoconfigure without needing to wait for the next scheduled RA message. It is worth noticing that in the OUI portion. IEEE has chosen FFFE as a reserved value which can only appear in EUI-64 generated from the an EUI-48 MAC address. This feature is a key benefit over IPv4 as it eliminates the need of manual configuration or DHCP as in the world of IPv4. C. but IPv6 Cisco Express Forwarding was disabled. Routers on the IPv6 segment will respond with an advertisement that provides an external path from the local subnet. which have a value of 133 in the Type field of the ICMP packet header. RA messages typically include the following information: · One or more onlink IPv6 prefixes that nodes on the local link can use to automatically configure their IPv6 addresses · Lifetime information for each prefix included in the advertisement · Sets of flags that indicate the type of autoconfiguration (stateless or stateful) that can be completed · Default router information (whether the router sending the advertisement should be used as a default router and. D. it maintains its original scope (global unique address is still global unique and vice versa).com/c/en/us/td/docs/ios/ipv6/configuration/guide/12_4t/ipv6_12_4t_book/ip6. IPv6 unicast forwarding was enabled. Given that router solicitation messages are usually sent by hosts at system startup (the host does not have a configured unicast address). the source address in router solicitation messages is usually the unspecified IPv6 address (0:0:0:0:0:0:0:0). Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Router Advertisements (RA) are sent in response to router solicitation messages. Reference: https://supportforums. the amount of time (in seconds) the router should be used as a default router) · Additional information for hosts. the globally unique addresses assigned by the IEEE has always been set to 0 whereas the locally created addresses has 1 configured. the unicast address of the interface sending the router solicitation message is used as the source address in the message. such as prefix discovery. Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Extended Unique Identifier (EUI). we have a fully functional EUI-64 format address. The IPv6 EUI-64 format address is obtained through the 48-bit MAC address. if so. where the DHCP server will allocate addresses to the local host. the seventh bit from the left.cisco. The Mac address is first separated into two 24-bits. IPv6 addresses containing "FFFE" indicate that the address is reserved for multicast.html . Once the above is done.5. This bit identifies whether this interface identifier is universally or locally administered.address QUESTION 31 A packet capture log indicates that several router solicitation messages were sent from a local host on the IPv6 segment. the address is locally administered and if 1. needs to be inverted. the destination address in the RA message is the unicast address of the source of the router solicitation message. Router solicitation messages. as per RFC2373. If the host has a configured unicast address. the address is globally unique. Therefore. All local host traffic will be redirected to the router with the lowest ICMPv6 signature. allows a host to assign iteslf a unique 64-Bit IP Version 6 interface identifier (EUI-64). The reason for inverting can be found in RFC4291 section 2. D.

.QUESTION 32 You have been asked to evaluate how EIGRP is functioning in a customer network.

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What is the ratio of traffic over each path? A.Traffic from R1 to R61 s Loopback address is load shared between R1-R2-R4-R6 and R1-R3. C. B.R5-R6 paths. D. 1:1 1:5 6:8 19:80 Correct Answer: D Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: First. find the IP address of the loopback0 interface on R6: .

. so we issue the show ip route 150.1.6.We see that it is 150.6.6 command from R1 and see this: Notice the traffic share count shows 19 for the first path. and 80 for the second path. QUESTION 33 You have been asked to evaluate how EIGRP is functioning in a customer network.1.6.

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D.46. C.168. 333056 1938688 1810944 307456 Correct Answer: C Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: R1`s routing table is as follows .0 network on R1? A.What is the advertised distance for the 192. B.

The numbers after the route specify the administrative distance of the route (90 for EIGRP) and the distance metric of that particular route.0 route.168. QUESTION 34 You have been asked to evaluate how EIGRP is functioning in a customer network.46. which is shows as 1810944 for the 192. .

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What type of route filtering is occurring on R6
A.
B.
C.
D.

Distribute-list using an ACL
Distribute-list using a prefix-list
Distribute-list using a route-map
An ACL using a distance of 255

Correct Answer: A
Section: Layer 3 Technologies
Explanation
Explanation/Reference:
Explanation:
The configuration on R6 is as follows:

This is a standard distribute list using access list number 1.
QUESTION 35
You have been asked to evaluate how EIGRP is functioning in a customer network.

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What percent of R1`s interfaces bandwidth is EIGRP allowed to use? A. D. C. B. 10 20 30 40 Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: The relevant configuration of R1 is shown below: .

config command.ip bandwidth-percent eigrp 1 20 1 = the EIGRP AS 20 = 20% of the bandwidth QUESTION 36 Scenario: You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. . The customer has disabled your access to the show running.

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. C.3. B. QUESTION 37 You have been asked to evaluate how EIGRP is functioning in a customer network. D.3. 1858 1601 600 1569 Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Part of the show ipospf topology command on R5 shows this: The Link ID of R3 (3.3) shows the age is 1858.How old is the Type 4 LSA from Router 3 for area 1 on the router R5 based on the output you have examined? A.

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C. CISCO EIGRP key MD5 Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: R4 and R2 configs are as shown below: . D.Which key chain is being used for authentication of EIGRP adjacency between R4 and R2? A. B.

QUESTION 38 Scenario: You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation.config command. The customer has disabled your access to the show running.Clearly we see the actual key chain is named CISCO. .

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config command. D. B. E. The customer has disabled your access to the show running. Look for the Area 1 stats which shows this: QUESTION 39 Scenario: You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. F. .How many times was SPF algorithm executed on R4 for Area 1? A. 1 5 9 20 54 224 Correct Answer: C Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: This can be found using the show ipospf command on R4. C.

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B. Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: We can see the configured timers using the following command: QUESTION 40 .40.Which of the following statements is true about the serial links that terminate in R3 A. 120.40 R3 is responsible for flooding LSUs to all the routers on the network. 120 The R1-R3 link OSPF timer values should be 10. D. C. The R1-R3 link needs the neighbor command for the adjacency to stay up The R2-R3 link OSPF timer values are 30.

Correct Answer: A Section: VPN Technologies Explanation Explanation/Reference: Explanation: Show NHRP: Examples The following is sample output from the show ipnhrp command: Router# show ipnhrp 10.12.2/8 via 10. Tunnel1 created 00:00:12. NHRP mapping is for networks that are local to this router.1111.2.255. E. Data packets are process switches for this mapping entry.255. The mask is always 255. The mapping entry was created in response to an NHRP registration request. It was obtained directly from the next-hop server.255. · Flags: authoritative--Indicates that the NHRP information was obtained from the Next Hop Server or router that maintains the NBMA-to-IP address mapping for a particular destination.0.0.cisco.1111.2 255. Flags: authoritative unique nat registered used NBMA address: 10. This value is based on the ipnhrpholdtime command.1. · Type of interface: dynamic--NBMA address was obtained from the NHRP Request packet. Tunnel0 created 0:10:03 expire 1:49:56 Type: static Flags: authoritative NBMA address: 10.1111.1.2. The customer has disabled your access to the show running. C.config command.1111.1111.1111.1111.1. B.1 255.com/c/en/us/td/docs/ios/12_4/ip_addr/configuration/guide/hadnhrp. The NHRP mapping entry cannot be overwritten.1.1.2 What does the authoritative flag mean in regards to the NHRP information? A. expire 01:59:47 TypE.html QUESTION 41 Scenario: You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation.255 because Cisco does not support aggregation of NBMA information through NHRP.255.255.11 10. static--NBMA address was statically configured.1111.0.Refer to the following output: Router#showipnhrp detail 10.255.2 The fields in the sample display are as follows: · The IP address and its network mask in the IP-to-NBMA address cache. tunnel 100 created 0:00:43 expire 1:59:16 Type: dynamic Flags: authoritative NBMA address: 10.255. · The interface type and number and how long ago it was created (hours:minutes:seconds). · The time in which the positive and negative authoritative NBMA address will expire (hours:minutes:seconds).dynamic. Reference: http://www. D.255.1111.1.0. .

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Areas of Router 5 and 6 are not normal areas. inspect their routing tables and determine which statement is true? A. R5's Loopback and R6's Loopback are both present in R5's Routing table R5's Loopback and R6's Loopback are both present in R6's Routing table Only R5's loopback is present in R5's Routing table Only R6's loopback is present in R5's Routing table Only R5's loopback is present in R6's Routing table Correct Answer: A Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: Here are the routing tables of R5 and R6: . B. C. D. E.

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x.200.165.255. interface Tunnel0 bandwidth 1536 ip address 209.255. a p2p GRE tunnel may connect to an mGRE tunnel.224 tunnel mode gre multipoint C.Topic 4.201.255. interface fa0/0 bandwidth 1536 ip address 209.224 tunnel source 209.2 tunnel destination 209.255.165.1 tunnel-mode dynamic Correct Answer: A Section: VPN Technologies Explanation Explanation/Reference: Explanation: The configuration of mGRE allows a tunnel to have multiple destinations.255. an mGRE tunnel requires NHRP to resolve the tunnel endpoints.165. Which interface configuration output can be applied to the corporate router to allow communication to the remote sites? A.224 tunnel source Serial0/0 tunnel mode gre multipoint B.200. Instead the GRE tunnel is configured with the command tunnel mode gre multipoint. This means that an mGRE tunnel on the hub may connect to a p2p tunnel on the branch. VPN Technologies QUESTION 42 A company has just opened two remote branch offices that need to be connected to the corporate network. tunnel interfaces by default are point-to-point (p-p) using GRE encapsulation.230 255.230 255.x found with p2p GRE tunnels. The configuration of mGRE on one side of a tunnel does not have any relation to the tunnel properties that might exist at the exit points. Conversely. interface fa 0/0 bandwidth 1536 ip address 209.161.165. The distinguishing feature between an mGRE interface and a p2p GRE interface is the tunnel destination.1 tunnel-mode dynamic D. The mGRE configuration is as follows: ! interface Tunnel0 bandwidth 1536 .255.255.224 tunnel source 192.168.165.165. An mGRE interface does not have a configured destination.231 255.200.255. interface Tunnel0 bandwidth 1536 ip address 209.200. This command is used instead of the tunnel destination x. effectively they have the tunnel mode gre command.201. Note.231 255.x. which is not seen in the configuration because it is the default. Besides allowing for multiple destinations.

cisco.255.1Q ISL PPP Frame Relay MPLS HDLC Correct Answer: A Section: VPN Technologies Explanation . F. crypto map: test sa timing: remaining key lifetime (k/sec): (4608000/52) IV size: 8 bytes replay detection support: Y outboundahsas: outboundpcpsas: Reference: http://www.cisco. C.html#Prblm1 QUESTION 45 Which encapsulation supports an interface that is configured for an EVN trunk? A. D. #pkts digest 7767918 #pktsdecaps: 7760382.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/DMVPDG/DMVP N_2_Phase2.1 and 12. B.1.0.10 255.1 local ident (addr/mask/prot/port): (20. 802. crypto map: test sa timing: remaining key lifetime (k/sec): (4608000/52) IV size: 8 bytes replay detection support: Y inboundahsas: inboundpcpsas: inboundpcpsas: outboundespsas: spi: 0x3D3(979) transform: esp-3des esp-md5-hmac .255. E.255. #pkts verify 7760382 #pkts compressed: 0.1.ip address 10. C.1.} #pktsencaps: 7767918. in use settings ={Tunnel.0 and 10.html QUESTION 44 Which common issue causes intermittent DMVPN tunnel flaps? A. F. } slot: 0.255.2 pathmtu 1500.1.: 12.html QUESTION 43 A network engineer executes the show crypto ipsecsa command.protocols/29240-dcmvpn.1.1.1. This output shows an example of the show crypto ipsecsa command (bolded ones found in answers for this question).1.0/255.0/0/0) remoteident (addr/mask/prot/port): (10. failed: 0. media mtu 1500 current outbound spi: 3D3 inboundespsas: spi: 0x136A010F(325714191) transform: esp-3des esp-md5-hmac . In order to resolve this problem.2 PERMIT. } slot: 0. remote crypto endpt. Reference: http://www. B. flow_id: 1444. inbound crypto map remaining key lifetime path MTU tagged packets untagged packets invalid identity packets Correct Answer: ABC Section: VPN Technologies Explanation Explanation/Reference: Explanation: show crypto ipsecsa This command shows IPsec SAs built between peers.com/c/en/us/support/docs/securityvpn/ipsec-negotiation-ike. The encrypted tunnel is built between 12.1.255.: 12. in use settings ={Tunnel.1. D.1.cisco.1.255. 12. Which three pieces of information are displayed in the output? (Choose three.0/255. a routing neighbor reachability issue a suboptimal routing table interface bandwidth congestion that the GRE tunnel to hub router is not encrypted Correct Answer: A Section: VPN Technologies Explanation Explanation/Reference: Explanation: DMVPN Tunnel Flaps Intermittently Problem DMVPN tunnel flaps intermittently. C.2 for traffic that goes between networks 20. #send errors 1.1.1. #pkts decrypt: 7760382. #pktscompr. #recv errors 0 local crypto endpt.1. D.1. flow_id: 1443. #pkts decompressed: 0 #pkts not compressed: 0. #pkts encrypt: 7767918. Authentication Header (AH) is not used since there are no AH SAs. make sure the neighborship between the routers is always up. #pkts decompress failed: 0. check the neighborship between the routers as issues with neighborship formation between routers may cause the DMVPN tunnel to flap.0/0/0) current_peer: 12.1. local addr. You can see the two Encapsulating Security Payload (ESP) SAs built inbound and outbound.) A. flags={origin_is_acl. conn id: 3442.com/c/en/us/support/docs/security-vpn/ipsec-negotiation-ike. E.1. Solution When DMVPN tunnels flap. conn id: 3443.1.protocols/5409-ipsec-debug-00.1.62. interface: FastEthernet0 Crypto map tag: test. B.1.1.0 tunnel source Serial0/0 tunnel mode gre multipoint Reference: http://www.

Unless the security appliance is configured to redirect http:// requests to https://.generation-firewalls/100936-asa8x-split-tunnel-anyconnect-config.book/evn-overview. and port channels. NHRP.) A. Reference: http://www. The network engineer advises the user to open a web browser. B. Using this initial hub-and-spoke network. IP address routing table forwarding table access control lists NetFlow configuration Correct Answer: ABC Section: VPN Technologies Explanation Explanation/Reference: Explanation: A trunk interface can carry traffic for multiple EVNs. This DMVPN provides the capability for creating a dynamic-mesh VPN network without having to pre-configure (static) all possible tunnel end-point peers. If the user satisfies the login and authentication.pdf QUESTION 46 A user is having issues accessing file shares on a network. B. DMVPN is initially configured to build out a hub-and-spoke network by statically configuring the hubs (VPN headends) on the spokes. C.com/en/US/docs/iosxml/ios/evn/configuration/xe-3sg/evn. Reference: http://www. After entering the URL. BGP) Dynamic IPsec encryption Cisco Express Forwarding (CEF) Reference: http://en. E. D.pdf QUESTION 48 Which Cisco IOS VPN technology leverages IPsec. and the security appliance identifies the user as requiring the client. you cannot configure VRF-Lite on the same interface. NHRP and IPsec. dynamic routing protocol. Without a previously installed client. the trunk interface is identified by the same IP address in different EVN contexts. D. Gigabit Ethernet.1q encapsulation.Explanation/Reference: Explanation: Restrictions for EVN · An EVN trunk is allowed on any interface that supports 802.html QUESTION 47 Which three characteristics are shared by subinterfaces and associated EVNs? (Choose three.wikipedia. This is accomplished as a result of each EVN having a unique routing and forwarding table. C. To simplify the configuration process. · A single IP infrastructure can be virtualized to provide up to 32 virtual networks end-to-end. · If an EVN trunk is configured on an interface. establishes a secure SSL connection and either remains or uninstalls itself (depending on the security appliance configuration) when the connection terminates. C.org/wiki/Dynamic_Multipoint_Virtual_Private_Network Topic 5. OSPFv2 is supported. including IPsec (Internet Protocol Security) and ISAKMP (Internet Security Association and Key Management Protocol) peers. D.com/c/en/us/td/docs/ios-xml/ios/evn/configuration/xe-3s/evn-xe-3s. the client installs and configures itself.com/c/en/us/support/docs/security/asa-5500-x-series-next. GRE. tunnels between spokes can be dynamically built on demand (dynamic-mesh) without additional configuration on the hubs or spokes. the browser connects to that interface and displays the login screen. DMVPN is combination of the following technologies: Multipoint GRE (mGRE) Next-Hop Resolution Protocol (NHRP) Dynamic Routing Protocol (EIGRP.cisco. This dynamic-mesh capability alleviates the need for any load on the hub to route data between the spoke networks. RIP. B. it downloads the client that matches the operating system of the remote computer. Infrastructure Security Updated reference QUESTION 49 Which traffic does the following configuration allow? ipv6 access-list cisco permit ipv6 host 2001:DB8:0:4::32 any eqssh linevty 0 4 ipv6 access-class cisco in .cisco.cisco.overview. input a prescribed IP address. · OSPFv3 is not supported. FlexVPN DMVPN GETVPN Cisco Easy VPN Correct Answer: B Section: VPN Technologies Explanation Explanation/Reference: Explanation: Dynamic Multipoint Virtual Private Network (DMVPN) is a dynamic tunneling form of a virtual private network (VPN) supported on Cisco IOS-based routers and Unix-like Operating Systems based on the standard protocols. remote users enter the IP address in their browser of an interface configured to accept SSL VPN connections. After doing this. no change in the configuration on the hub is required to accept new spokes. EZVPN IPsec VPN client access VPDN client access SSL VPN client access Correct Answer: D Section: VPN Technologies Explanation Explanation/Reference: Explanation: The Cisco AnyConnect VPN Client provides secure SSL connections to the security appliance for remote users. Which type of remote access did the engineer enable? A. the user is able to access company shares. users must enter the URL in the form https://<address>. such as Fast Ethernet. and follow the instructions. OSPF. all the subinterfaces and associated EVNs have the same IP address assigned. mGRE. Reference: http://www. In other words. After downloading. and Cisco Express Forwarding? A. thereby enabling support for overlapping IP addresses across multiple EVNs.

A packet that matches access-list with the "log" keyword is Cisco Express Forwarding switched.cisco. all traffic to vty 0 4 from source 2001:DB8:0:4::32 only ssh traffic to vty 0 4 from source all only ssh traffic to vty 0 4 from source 2001:DB8:0:4::32 all traffic to vty 0 4 from source all Correct Answer: C Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Here we see that the IPv6 access list called cisco is being applied to incoming VTY connections to the router. broadcast mode. which method can you use in combination with the debug ip packet command to limit the amount of output data? A. a number of common types of denial-of-service (DoS) attacks. the network engineer notices that the router CPU utilization has risen to 99 percent. D.com/web/about/security/intelligence/acl-logging. and VRF mode strict mode. You can use an IOS parser. C. For Internet service providers (ISPs) that provide public access. B.dmvpn/111976-dmvpn-troubleshoot-00. can take advantage of forged or rapidly changing source IP addresses to allow attackers to thwart efforts to locate or filter the attacks. B. QUESTION 50 Refer to the following access list. and VRF mode Correct Answer: A Section: Infrastructure Security Explanation . What is the reason for this? A. Reference: http://www. D.A. C. Reference: http://www.cisco.html#4 QUESTION 51 For troubleshooting purposes. B. Unicast RPF deflects such attacks by forwarding only packets that have source addresses that are valid and consistent with the IP routing table. IPv6 access list has just one entry. its customer. This command should be used with caution in production networks. D. and broadcast mode strict mode. B. Correct Answer: C Section: Infrastructure Security Explanation Explanation/Reference: Explanation: The debug ip packet command generates a substantial amount of output and uses a substantial amount of system resources. loose mode.html QUESTION 52 Which address is used by the Unicast Reverse Path Forwarding protocol to validate a packet against the routing table? A. E. You can use the KRON scheduler. This action protects the network of the ISP. A packet that matches access-list with the "log" keyword is fast switched.html QUESTION 53 What are the three modes of Unicast Reverse Path Forwarding? A. and VRF mode broadcast mode. Unfortunately. For example. Correct Answer: C Section: Infrastructure Security Explanation Explanation/Reference: Explanation: Logging-enabled access control lists (ACLs) provide insight into traffic as it traverses the network or is dropped by network devices. and the rest of the Internet.com/c/en/us/ support/docs/security/dynamic-multipoint-vpn. You can disable the IP route cache globally. including Smurf and Tribal Flood Network (TFN). D. C. C.cisco. Always use with the access-list command to apply an extended ACL to the debug output. A packet that matches access-list with the "log" keyword is process switched. ACL logging can be CPU intensive and can negatively affect other functions of the network device. loose mode. You can use the RITE traffic exporter. There are two primary factors that contribute to the CPU load increase from ACL logging: process switching of packets that match log-enabled access control entries (ACEs) and the generation and transmission of log messages. D. C. You can use an extended access list. which allows only the single IPv6 IP address of 2001:DB8:0:4::32 to connect using SSH only. A large amount of IP traffic is being permitted on the router.com/en/US/docs/ios/12_2/security/configuration/guide/scfrpf. strict mode. source address destination address router interface default gateway Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: The Unicast RPF feature helps to mitigate problems that are caused by the introduction of malformed or forged (spoofed) IP source addresses into a network by discarding IP packets that lack a verifiable IP source address. access-list 100 permit ip any any log After applying the access list on a Cisco router. Reference: http://www. B. loose mode.

14.255. This ACL is used to prevent all packets with a spoofed reserved private source IP address to enter the network. but the port number must be number higher than 1024 unless the default is used. C.0. which allows the use of the default route in the source verification process. The default is 443. Care must be taken to ensure that the appropriate Unicast RPF mode (loose or strict) is configured during the deployment of this feature because it can drop legitimate traffic. ip helper-address {ip address} .0.16. It prevents the internal network from being used in spoofed denial of service attacks and logs any exit to the Internet.0 0.225 router(config-if)#ipudp helper-address 172.html QUESTION 54 What does the following access list.0.Integer in the range of 0 to 65535 is accepted.225 router(config-if)#udp helper-address 172. C.0.255.0 0.20.16. The router will never accept any HTTP and HTTPS traffic. and 49 to 172.255. use the ip http secure-port command in global configuration mode.14.0.225. D.cisco. 192.20.20. the packet is discarded.168. B.255.255.255 172. which is applied on the external interface FastEthernet 1/0 of the perimeter router. use the no form of this command. It filters incoming traffic from private addresses in order to prevent spoofing and logs any intrusion attempts. iphttpsecure-portport-number noiphttpsecure-port Syntax Description port.0.0-192.html#wp3612805529 QUESTION 56 A network engineer is configuring a routed interface to forward broadcasts of UDP 69.0.0 0.168.168.15. This security feature works by enabling a router to verify the reachability of the source address in packets being forwarded.255 and logs any intrusion attempts.20. Reference: http://www.0. router(config-if)#ip helper-address 172.sh.255. If the source IP address is not valid.0.255. The broadcasts will be forwarded to the unicast address which is specified with the ip helper command.14.cisco.168. When administrators use Unicast RPF in strict mode. loose mode.com/web/about/security/intelligence/unicast-rpf.0.172.0. accomplish? router(config)#access-list 101 deny ip 10.Explanation/Reference: Explanation: Network administrators can use Unicast Reverse Path Forwarding (Unicast RPF) to help limit the malicious traffic on an enterprise network. Unicast RPF works in one of three different modes: strict mode. Unicast RPF configured in strict mode may drop legitimate traffic that is received on an interface that was not the router's choice for sending return traffic.31.0.168. Additionally.0 . 53.255.0 .0. Correct Answer: C Section: Infrastructure Security Explanation Explanation/Reference: Explanation: The private IP address ranges defined in RFC 1918 are as follows: 10. QUESTION 55 Refer to the following command: router(config)# ip http secure-port 4433 Which statement is true? A.255 192. It prevents private internal addresses to be accessed directly from outside.225 69 53 49 Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: To let a router forward broadcast packet the command ip helper-address can be used. the source address must appear in the routing table.192. D. Correct Answer: A Section: Infrastructure Security Explanation Explanation/Reference: Explanation: To set the secure HTTP (HTTPS) server port number for listening.14. Reference: http://www.0.172. B.16. The router will listen to HTTP and HTTP traffic on port 4433.255 any log router (config) #access-list 101 deny ip 172. This capability can limit the appearance of spoofed addresses on a network. D.255 any log router (config)#access-list 101 permit ip any any router (config)#interface fastEthernet 1/0 router (config-if)#ip access-group 101 in A.0 .255.0.20. Unicast RPF in VRF mode will not be covered in this document.255 These IP addresses should never be allowed from external networks into a corporate network as they would only be able to reach the network from the outside via routing problems or if the IP addresses were spoofed. the packet must be received on the interface that the router would use to forward the return packet.10. Note that not all network devices support all three modes of operation. To return the HTTPS server port number to the default. It prevents incoming traffic from IP address ranges 10.14. C.0. 172. Administrators can change this behavior using the allow-default option.com/en/US/docs/ios-xml/ios/https/command/nm-https-cr-cl.225 router(config-if)#ip helper-address 172. Dropping this legitimate traffic could occur when asymmetric routing paths are present in the network. When administrators use Unicast RPF in loose mode. Unicast RPF loose mode is a scalable option for networks that contain asymmetric routing paths. The log keyword also enables logging of this intrusion attempt. or VRF mode. B. The router will listen on port 4433 for HTTPS traffic.255. Which command should be applied to the configuration to allow this? A. a packet that contains a source address for which the return route points to the Null 0 interface will be dropped.31. The router will listen on port 4433 for HTTP traffic.255. An access list may also be specified that permits or denies certain source addresses in Unicast RPF loose mode.255 any log router (config)#access-list 101 deny ip 192.0-10. Although asymmetric traffic flows may be of concern when deploying this feature.255.

It enables a device to receive NTP broadcast and unicast packets. B. in other words. When you use the ntp broadcast client command.cr-book/bsm-xe-3se-3850-cr-book_chapter_00.When configuring the ip helper-address command. The following security levels exits: noAuthNoPriv (no authentiation and no encryption noauth keyword in CLI). B. It enables receiving NTP broadcasts on the interface where the command was executed. more granular monitoring can occur. SNMPv3. QUESTION 59 A network engineer is trying to implement broadcast-based NTP in a network and executes the ntp broadcast client command. Specify a logging rate limit. E. Assuming that an NTP server is already set up. AuthNoPriv (messages are authenticated but not encrypted auth keyword in CLI). Command Description ntp broadcast Allows the system to receive NTP broadcast packets on an client interface. the NTP service is activated (if it has not already been activated) and the device is configured to receive NTP broadcast packets on a specified interface simultaneously. Correct Answer: AB Section: Infrastructure Services Explanation Explanation/Reference: Explanation: The optional msec keyword specifies the date/time format should include milliseconds. SNMPv1 and SNMPv2 models only support the noAuthNoPriv model since they use plain community string to match the incoming packets. E. Set the logging severity level to 1. C. Which two actions can you take to provide enhanced logging results? (Choose two. which feature can the engineer use to create a crash collection? A. alert. or to correlate the order that the events happened. In this situation. use the logging history command in global configuration mode. Increase the logging history . senior management asks you to implement better logging functionality on all IOS-based devices. D.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-xe-3se-3850.ine. B.port 67 · TACACS UDP port 49 Reference: http://www. It enables a device to be an NTP peer to another device. B. C. Disable event logging on all noncritical items.cisco.com/2008/07/19/snmpv3-tutorial/ QUESTION 58 After a recent DoS attack on a network." By increasing the severity level.port 138 · Bootstrap Protocol (BOOTP) . To limit syslog messages sent to the router's history table and to an SNMP network management station based on severity.com/163/forward_udp_broadcas. Use the msec option to enable service time stamps. The SNMPv3 implementations could be configured to use either of the models on per-group basis (in case if noAuthNoPriv is configured. AuthPriv (messages are authenticated and encrypted priv keyword in CLI). error. C.port 137 · NetBIOS Datagram Server . Cisco devices Log error messages of severity levels 0 through 4 (emergency. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: The NTP service can be activated by entering any ntp command. and SNMP messages will be sent by the less sever (5-7) messages. and warning levels). Reference: http://blog. "saving level warnings or higher.cisco-faq.port 37 · NetBIOS Name Server . It enables receiving NTP broadcasts on all interfaces globally.UDP port 69 · Domain Name System (DNS) UDP port 53 · Time service . Infrastructure Services QUESTION 57 When using SNMPv3 with NoAuthNoPriv. the following broadcast packets will be forwarded by the router by default: · TFTP . secure copy protocol core dumps warm reloads SNMP NetFlow Correct Answer: B Section: Infrastructure Services Explanation . username serves as a replacement for community string). C. what is the result of the command? A. D. which string is matched for authentication? A. username password community-string encryption-key Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: The following security models exist: SNMPv1.html Topic 6. This can aid in pinpointing the exact time of events. D. By default.html QUESTION 60 A network engineer finds that a core router has crashed without warning.) A. SNMPv2. Reference: http://www. D. critical.

ccnpguide. SNMP version 2 uses community strings (think cleartext passwords. B.201. C.html QUESTION 61 A network engineer is configuring SNMP on network devices to utilize one-way SNMP notifications. connectionless-oriented service-oriented connection-oriented application-oriented . Four basic ways exist for setting up the router to generate a core dump: · Using Trivial File Transfer Protocol (TFTP) · Using File Transfer Protocol (FTP) · Using remote copy protocol (rcp) · Using a Flash disk Reference: http://www. the engineer is not concerned with authentication or encryption. router(config)#snmp-server host 172. It rewrites transport layer headers.16. groups. which determines the access policy for its users. C. D. D. B. Like IPv4 to IPv6. but I would suggest otherwise. NAT NATng NAT64 dual-stack NAT DNS64 Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: NAT64 is a mechanism to allow IPv6 hosts to communicate with IPv4 servers. Users. The view is used to define what the user account may access on the IOS device. E. Which type of statistics does the engineer see? A. However. The IPv6 client embeds the IPv4 address it wishes to communicate with using these bits. and to transports that use the TCP/UDP/DCCP (Datagram Congestion Control Protocol) pseudo-header and checksum NPTv6 provides a simple and compelling solution to meet the address-independence requirement in IPv6. Which feature allows IPv6 devices to communicate with IPv4 servers? A. and sends its packets to the resulting address. C. It`s simple to configure on both the router/switch-side and just as easy on the network monitoring server. designed to provide address independence to the edge network. The users are not actual local user accounts.28 informs version 2c CISCORO router(config)#snmp-server host 172.201.Explanation/Reference: Explanation: When a router crashes. D.wikipedia.ietf. algorithmic translation function. checksum-neutral. SNMP version 3 moves away from the community string approach in favor of user.16. each user is added to a group.org/wiki/NAT64 QUESTION 63 What is a function of NPTv6? A.16.16. views. Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: RFC 6296 describes a stateless IPv6-to-IPv6 Network Prefix Translation (NPTv6) function. It is checksum-neutral. it is sometimes useful to obtain a full copy of the memory image (called a core dump) to identify the cause of the crash. Reference: http://www. and nothing else.28 traps version 2c CISCORO router(config)#snmp-server host 172.201.based authentication and view-based access control. Reference: http://en. It maintains a per-node state.28 informs version 3 auth CISCORO Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Most network admins and engineers are familiar with SNMPv2c which has become the dominant SNMP version of the past decade. Most companies have decided that the information being transmitted isn`t valuable enough to be worth the extra effort in upgrading to SNMPv3. To avoid as many of the issues associated with NAPT44 as possible. Core dumps are generally very useful to your technical support representative. RFC 6146).org/html/rfc6296 QUESTION 64 A network engineer initiates the ipsla responder tcp-connect command in order to gather statistics for performance gauging. It interferes with encryption of the full IP payload. there are some major changes under the hood.com/snmp-version-3/ QUESTION 62 IPv6 has just been deployed to all of the hosts within a network. but not to the servers.201. The address-independence benefit stems directly from the translation function of the network prefix translator. rather they are simply a means to determine who can authenticate to the device. The problem of course is that the SNMP statistical payload is not encrypted and authentication is passed in cleartext. NPTv6 is defined to include a two-way. no encryption) to authenticate polling and trap delivery.28 traps version 3 auth CISCORO router(config)#snmp-server host 172. B. The NAT64 server then creates a NAT-mapping between the IPv6 and the IPv4 address. D. allowing them to communicate. C.cisco. Finally. It is transport-agnostic with respect to transports that do not checksum the IP header. B. such as SCTP.com/en/US/docs/internetworking/troubleshooting/guide/tr19aa. The NAT64 server is the endpoint for at least one IPv4 address and an IPv6 network segment of 32-bits (for instance 64:ff9b::/96. Which command satisfies the requirements of this scenario? A. Reference: http://tools. see RFC 6052.

The operation is scheduled to start immediately. as shown in the "TCP Connect Operation" figure in the "Information About the IP SLAs TCP Connect Operation" section. there is no need to send the control message. configure terminal 3.0. IPv6 PMTU is enabled on the router. Example: Device(config)# ipv6 flowset Reference: http://www.Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Configuration Examples for IP SLAs TCP Connect Operations The following example shows how to configure a TCP Connection-oriented operation from Device B to the Telnet port (TCP port 23) of IP Host 1 (IP address 10. IP address 10. D. the control protocol is disabled on the source (Device B). B.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic/configuration/15. . and datagrams the total number of flows contained within them.known TCP port is used. (1000) and 10.com/c/en/us/td/docs/ios-xml/ios/ipsla/configuration/15-mt/sla-15. This action allows the responder to reply to the TCP Connect operation. IP SLAs uses the control protocol to notify the IP SLAs responder to enable the target port temporarily.cisco. IPv6 flow control is enabled on the router.0. SUMMARY STEPS 1. Flow-set marking in 1280-byte or larger packets is enabled.1.cisco.1.2. C.0. output drops enqueuing for the RP fragmentation failures adjacency issues Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Table 5 show ip flow export Field Descriptions Field Description Exporting flows to 10. Enter your password if prompted.1 Specifies the export destinations and ports.mt-book/ sla_tcp_conn. In this example. because the target is not a Cisco device and a well. Which line in the output indicates that the send queue is full and export packets are not being sent? A.mt/ip6b-15-mt-book/ip6-mtu-path-disc.html QUESTION 65 A network engineer executes the ipv6 flowset command. 0 flows failed due to lack of No memory was available to create an export export packet packet. Exporting using source Specifies the source address or interface. enable 2.3. ipv6flowset 4.1 The ports are in parentheses.1.1 port 23 Reference: http://www. Example: Device> enable Step 2 configure terminal Enters global configuration mode.1).1. What is the result? A. In this example. B.html QUESTION 66 A network engineer executes the show ip flow export command. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Enabling Flow-Label Marking in Packets that Originate from the Device This feature allows the device to track destinations to which the device has sent packets that are 1280 bytes or larger.1 Version 5 flow records Specifies the version of the flow. clear ipv6 mtu DETAILED STEPS Command or Action Purpose Step 1 enable Enables privileged EXEC mode. C. D. 11 flows exported in 8 udp The total number of export packets sent.0. Example: Device# configure terminal Step 3 ipv6 flowset Configures flow-label marking in 1280-byte or larger packets sent by the device. exit 5. Device A (target device) Configuration configure terminal ipsla responder tcp-connect ipaddress 10. Flow-label marking in 1280-byte or larger packets is enabled.

access-list 7 permit 10.10.31 access-list 7 permit 10.1.10.Defines Ethernet 1 with an IP address and as a NAT inside interface. 0 export packets were dropped due to IPC rate limiting 0 export packets were Indicates that the send queue was full while dropped due to output the packet was being transmitted.0.31 !--.1 255.0.10.10.10.10. One of the last things that the engineer does is to configure an access list (access-list 1 permit any) along with the command ipnat inside source list 1 int s0/0 overload. as an alternative to powering down the active router and letting the network respond accordingly. C. interface serial 0 ip address 172. Note in the previous second configuration.20.Defines serial 0 with an IP address and as a NAT outside interface.31. ipnat pool ovrld 172.0 through 10. The command access-list 1 permit any defines only one machine that is allowed through the tunnel.10.address.0. D.16. fragmentation failures 0 export packets were dropped due to encapsulation fixup failures 0 export packets were Indicates that there was a problem transferring dropped enqueuing for the the export packet between the RP and the line RP card.10.255.1 prefix 24 ! !--.Translations are overloaded.10. The keyword overload used in the ipnat inside source list 7 pool ovrld overload command allows NAT to translate multiple inside devices to the single address in the pool.255.0.0 export packets were sent The packet could not be processed by CEF or up to process level by fast switching. Reference: http://www.255. possibly because another feature requires running on the packet.10. 172.10.0 ipnat outside !--.cisco. drops Reference: http://www.Defines Ethernet 0 with an IP address and as a NAT inside interface.0 0.cisco.translated to an address out of the NAT pool named ovrld.64 255.255.255. which allows multiple inside !--.are permitted by access-list 7 has the source address !--.0 0.0 through 10.20.devices to be translated to the same valid IP address.Indicates that any packets received on the inside interface that !--.16. The command ipnat inside source list 1 int s0/0 overload disables "many-to-one" access for all devices on a defined segment to share a single IP address upon exiting the external interface.31 and 10. The command access-list 1 defines interesting traffic that is allowed through the tunnel. the NAT pool "ovrld"only has a range of one address.16. Which functions do the two commands serve in this scenario? A. B.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080094e77. ipnat inside source list 7 pool ovrld overload ! ! ! ! !--. !--.255. interface ethernet 1 ip address 10.com/c/en/us/td/docs/ios/12_0s/feature/guide/oaggnf.20.10.10.10.16. The command ipnat inside source list 1 int s0/0 overload provides "many-to-one" access for all devices on a defined segment to share a single IP address upon exiting the external interface.1 172.0 ipnat inside !--.0 ipnat inside !--.1 255.shtml QUESTION 68 A network engineer is configuring a solution to allow failover of HSRP nodes during maintenance windows.10.html QUESTION 67 A network engineer is asked to configure a "site-to-site" IPsec VPN tunnel. Correct Answer: D Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Configuring NAT to Allow Internal Users to Access the Internet Using Overloading NAT Router interface ethernet 0 ip address 10.20.Defines a NAT pool named ovrld with a range of a single IP !--. 0 export packets were Indicates that CEF was unable to switch the dropped due to no fib packet or forward it up to the process level.10. 0 export packets were dropped due to adjacency issues 0 export packets were Indicates that the packet was dropped because dropped due to of problems constructing the IP packet.10. Which action will allow for manual switching of HSRP nodes? .Access-list 7 permits packets with source addresses ranging from !--.

E.manageengine. In order to identify which specific type of traffic is causing this slowness. What is the best . CEF was enabled at the global level and within seconds. Every NetFlow configuration aspect was checked and nothing incorrect was found. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: We came across a recent issue where a user setup a router for NetFlow export but was unable to see the OUT traffic for the interfaces in NetFlow Analyzer. That is when we noticed the no ipcef` command on the router. Track the up/down state of a loopback interface and shut down this interface during maintenance. go into global configuration mode and enter the CEF command. Switching is what a router does when it makes the following decisions: 1.html QUESTION 71 A company's corporate policy has been updated to require that stateless. CEF offers the following benefits: 1. Adjust the HSRP priority without the use of preemption. Without enabling the CEF on the router. the network engineer is unable to see OUT traffic on the interfaces. To enable CEF. B.cisco. 1-to-1. After reviewing the output of NetFlow. Cisco Express Forwarding has not been configured globally. what is the next hop of the router and which interface will the router use to get to that destination. Why CEF Needed when enabling NetFlow ? CEF is a prerequisite to enable NetFlow on the router interfaces. Router#config t Router(config)#ipcef Router(config)# To disable CEF. This decision-making process is called switching. Which feature should the engineer use to gather the required information? A. Reference: https://blogs. D. ie. a flow is identified as the combination of the following key fields: Source IP address Destination IP address Source Layer 4 port number Destination Layer 4 port number Layer 3 protocol type Type of service (ToS) Input logical interface Reference: http://www. allows for advanced features like NBAR 3. What can you determine based on this information? A. Better performance than fast-switching (the default) and takes less CPU to perform the same task.html QUESTION 70 An organization decides to implement NetFlow on its network to monitor the fluctuation of traffic that is disrupting core services. Enabling and Disabling CEF is easy.cisco.html QUESTION 69 A network engineer is notified that several employees are experiencing network performance related issues. If the line protocol of the specified interface goes down.A. C. CEF decides through which interface traffic is exiting the router. and bandwidth-intensive applications are identified as the root cause.com/en/US/docs/ios-xml/ios/netflow/configuration/12-4t/cfg-nflow. Whether to forward or not forward the packets after checking that the destination for the packet is reachable. Flow Export version 9 is in use. Specifically.in-netflow-data-export. noipcef. The FIB is organized differently than the routing table and CEF uses the FIB to decide which interface to send traffic from. 2. Loopback interfaces can be tracked. so when this interface is shut down the HSRP priority for that router will be lowered and the other HSRP router will then become the active one. NetFlow output has been filtered by default. called the Forwarding Information Base (FIB). information such as the source/destination IP and Layer 4 port numbers is required. the NetFlow packets exported from the router will have Destination interface as null and this leads NetFlow Analyzer to show no OUT traffic for the interfaces. the HSRP priority is reduced. C. The command ip flow-capture fragment-offset has been enabled. and IPv6 to IPv6 translations at the Internet edge are performed. If the CEF is disabled on the router.hsrp/13780-6. Disable and enable all active interfaces on the active HSRP node. B.com/c/en/us/support/docs/ip/hot-standby-router-protocol. Overall. SNMP Cisco IOS EEM NetFlow Syslog WCCP Correct Answer: C Section: Infrastructure Services Explanation Explanation/Reference: Explanation: NetFlow Flows Key Fields A network flow is identified as a unidirectional stream of packets between a given source and destination--both are defined by a network-layer IP address and transport-layer source and destination port numbers. CEF creates its own table. When enabled. simply use the no` form of the command. C. 2. Based on the routing table. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: The standby track command allows you to specify another interface on the router for the HSRP process to monitor in order to alter the HSRP priority for a given group. What is CEF? CEF is one of the available switching options for Cisco routers. What is switching? A Router must make decisions about where to forward the packets passing through. NetFlow Analyzer started showing OUT traffic for the interfaces. D.com/network-2/netflowanalyzer/2010/05/19/need-for-cef. which allows for maintenance mode. the NetFlow packets did not mark the destination interfaces and so NetFlow Analyzer was not able to show the OUT traffic for the interfaces. B.data-expt. D. This means that another HSRP router with higher priority can become the active router if that router has standby preempt enabled. CEF can switch traffic faster than route-caching using fast-switching How to enable CEF? CEF is disabled by default on all routers except the 7xxx series routers. This is why this topic is about Cisco Express Forwarding. Enable HSRPv2 under global configuration. If the destination is reachable. Reference: http://www. Any NetFlow analyzer product will calculate the OUT traffic for an interface based on the Destination Interface value present in the NetFlow packets exported from the router.

Example: Device# show flow exporter FLOW_EXPORTER-1 Reference: http://www. The DNS64 and NAT64 functions are completely separated.html QUESTION 74 Which two methods of deployment can you use when implementing NAT64? (Choose two. E. Table 2. or NAT64.) A.cisco. stateless stateful manual automatic static functional dynamic Correct Answer: AB Section: Infrastructure Services Explanation Explanation/Reference: Explanation: While stateful and stateless NAT64 perform the task of translating IPv4 packets into IPv6 packets and vice versa. NAT64 NAT44 NATv6 NPTv4 NPTv6 Correct Answer: E Section: Infrastructure Services Explanation Explanation/Reference: Explanation: NPTv6 provides a mechanism to translate the private internal organization prefixes to public globally reachable addresses. Reference: http:// www. technology facilitates communication between IPv6-only and IPv4-only hosts and networks (whether in a transit. C.) A. This solution allows both enterprises and ISPs to accelerate IPv6 adoption while simultaneously handling IPv4 address depletion.html QUESTION 73 Which two functions are completely independent when implementing NAT64 over NAT-PT? (Choose two. there are important differences. F. B. Differences Between Stateless NAT64 and Stateful NAT64 Stateless NAT64 Stateful NAT64 .cisco. The following table provides a high-level overview of the most relevant differences. multi homing. D. D.solution/white_paper_c11-676278. E. configuration of the specified flow exporter current status of the specified flow exporter status and statistics of the specified flow monitor configuration of the specified flow monitor Correct Answer: B Section: Infrastructure Services Explanation Explanation/Reference: Explanation: show flow exporter exporter-name (Optional) Displays the current status of the specified flow exporter. The following command is entered: switch#show flow exporter Flow_Exporter-1 What is the expected output? A. B. B. C. an access. B.com/c/dam/en/us/td/docs/solutions/SBA/August2012/Cisco_SBA_BN_IPv6Ad dressingGuide-Aug2012. Reference: http://www. The use cases for NPTv6 outlined in the RFC include peering with partner networks. or an edge network). G. The translation mechanism is stateless and provides a 1:1 relationship between the internal addresses and external addresses.fnflow-exprts. D. which is essential to the superiority of NAT64 over NAT-PT.com/en/US/docs/ios-xml/ios/fnetflow/configuration/15-mt/cfg-de. D.com/c/en/us/products/collateral/ios-nx-os-software/enterprise-ipv6.cisco. DNS NAT port redirection stateless translation session handling Correct Answer: AB Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Network Address Translation IPv6 to IPv4.pdf QUESTION 72 A network engineer has left a NetFlow capture enabled over the weekend to gather information regarding excessive bandwidth utilization.solution to ensure compliance with this new policy? A. C. E. and redundancy and load sharing. C.

Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: The sampling mode determines the algorithm that selects a subset of traffic for NetFlow processing. Reference: http://www. C. SLAAC Reference: http://www. Table 2 show flow-sampler Field Descriptions Field Description Sampler Name of the flow sampler . then NetFlow might sample the 5th.1 5858? A. Reference: http://www.com/c/en/us/products/collateral/ios-nx-os-software/enterprise-ipv6.1 on port UDP/5858.10.com/c/en/us/td/docs/ios/12_0s/feature/guide/12s_mdnf. For example. The n value is a parameter from 1 to 65535 packets that you can configure. each packet randomly chosen from every group of 100 packets.1 and port UDP/5858.cisco. The sampler matched 10 packets. one packet every 100 packets. Flow monitors consist of a record and a cache.solution/white_paper_c11-676277.10. use theip flow-export destination command in global configuration mode.html QUESTION 75 Which NetFlow component is applied to an interface and collects information about flows? A. Which statement about the output of the show flow-sampler command is true? A.10. B. D.html#wp1023091 QUESTION 77 Refer to the exhibit.cisco. which is configured for the flow monitor and stored in the flow monitor cache. B. 302nd. The sampler matched 10 packets. udp-port UDP protocol-specific port number.html#w p1314030 QUESTION 76 What is the result of the command ip flow-export destination 10. each one randomly chosen from every 100-second interval. and so on packets.com/c/en/us/td/docs/ios/fnetflow/command/reference/fnf_book/fnf_01. 120th.10. flow monitor flow exporter flow sampler flow collector Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Flow monitors are the NetFlow component that is applied to interfaces to perform network traffic monitoring. In the random sampling mode that Random Sampled NetFlow uses. It configures the router to receive cache flow information about flows with destination IP 10.10.10. D. The sampler matched 10 packets. incoming packets are randomly selected so that one out of each n sequential packets is selected on average for NetFlow processing. C. This sample configuration provides NetFlow data on 1 percent of total traffic.10.1 on port UDP/5858. You add the record to the flow monitor after you create the flow monitor. hence lacks transparency and scalability in end-to-end address transparency No state or bindings created on the State or bindings are created on every translation unique translation Requires IPv4-translatable IPv6 No requirement on the nature of IPv6 addresses assignment (mandatory address assignment requirement) Requires either manual or DHCPv6 Free to choose any mode of IPv6 based address assignment for IPv6 address assignment viz.10. C.IP address of the workstation to which you want to send the address NetFlow information. B. It configures the router to export cache flow information to IP 10. It configures the router to export cache flow information about flows with destination IP 10.10. Syntax Description ip. Manual. The flow monitor cache is automatically created at the time the flow monitor is applied to the first interface. 199th. one packet every 100 seconds.1 and port UDP/5858.1:1 translation 1:N translation No conservation of IPv4 address Conserves IPv4 address Assures end-to-end address Uses address overloading. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: To enable the exporting of information in NetFlow cache entries.cisco. It configures the router to receive cache flow information from IP 10. D.10. The sampler matched 10 packets. hosts DHCPv6. if you set the sampling rate to 1 out of 100 packets. Flow data is collected from the network traffic during the monitoring process based on the key and nonkey fields in the record.

Link between Chicago and NewYork Loopback0 172.189 Secret Password: cisco . You have been asked to complete the implementation to allow this ping. Currently the implementation is partially completed.9/30 .168.5/30 . • The routing protocol must be enabled for each interface using the most specific wildcard mask possible.16.id Unique ID of the flow sampler packets matched Number of packets matched for the flow sampler mode Flow sampling mode sampling interval is Flow sampling interval (in packets) Reference: http://www.com is a small IT corporation that is attempting to implement the network shown in the exhibit. • OSPF area 21 must not receive any inter-area or external routes.16.189.Link between Chicago and NewYork S0/1 192.Link between Seattle and Chicago Secret Password: cisco Chicago S0/0 192. • The serial link between Seattle and Chicago must be in OSPF area 21. However.6/30 .168.cisco.168. • The routing protocol for each interface must be enabled under the routing process. they cannot ping from the serial interface of the Seattle router to the loopback interface of the NewYork router.10/30 .com/c/en/us/td/docs/ios/12_0s/feature/guide/nfstatsa. The SO/O interface on Chicago and the SO/1 interface on NewYork are in Area 0.54. ROUTE.Link between Seattle and Chicago Secre Password: cisco NewYork S0/1 192. Network Information Seattle S0/0 192.com's corporate implementation guidelines require: • The OSPF process ID for all routers must be 10.54.16.html#wp1084291 QUESTION 78 Route.168. The loopbackO interface on NewYork is in Area 1. OSPF has been configured on routers Chicago and NewYork.

Correct Answer: Answer: Here is the solution below:
Section: Layer 3 Technologies
Explanation
Explanation/Reference:
Explanation:
Note: In actual exam, the IP addressing, OSPF areas and process ID, and router hostnames may change, but the overall solution is the same.
Seattle’s S0/0 IP Address is 192.168.16.5/30. So, we need to find the network address and wildcard mask of 192.168.16.5/30 in order to configure the OSPF.
IP Address: 192.168.16.5 /30
Subnet Mask: 255.255.255.252
Here subtract 252 from 2565, 256-252 = 4, hence the subnets will increment by 4.
First, find the 4th octet of the Network Address:

The 4th octet of IP address (192.168.16.5) belongs to subnet 1 (4 to 7).
Network Address: 192.168.16.4
Broadcast Address: 192.168.16.7
Lets find the wildcard mask of /30.
Subnet Mask: (Network Bits – 1’s, Host Bits – 0’s)
Lets find the wildcard mask of /30.

Now we configure OSPF using process ID 10 (note the process ID may change to something else in real exam).
Seattle>enable
Password:

Seattle#conf t
Seattle(config)#router ospf 10
Seattle(config-router)#network 192.168.16.4 0.0.0.3 area 21
One of the tasks states that area 21 should not receive any external or inter-area routes (except the default route).
Seattle(config-router)#area 21 stub
Seattle(config-router)#end
Seattle#copy run start
Chicago Configuration:
Chicago>enable
Password: cisco
Chicago#conf t
Chicago(config)#router ospf 10
We need to add Chicago’s S0/1 interface to Area 21
Chicago(config-router)#network 192.168.16.4 0.0.0.3 area 21
Again, area 21 should not receive any external or inter-area routes (except the default route).
In order to accomplish this, we must stop LSA Type 5 if we don’t want to send external routes. And if we don’t want to send inter-area routes, we have to stop LSA
Type 3 and Type 4. Therefore we want to configure area 21 as a totally stubby area.
Chicago(config-router)#area 21 stub no-summary
Chicago(config-router)#end
Chicago#copy run start
The other interface on the Chicago router is already configured correctly in this scenario, as well as the New York router so there is nothing that needs to be done
on that router.
QUESTION 79
ROUTE.com is a small IT corporation that has an existing enterprise network that is running IPv6 0SPFv3. Currently OSPF is configured on all routers. However,
R4's loopback address (FEC0:4:4) cannot be seen in R1's IPv6 routing table. You are tasked with identifying the cause of this fault and implementing the needed
corrective actions that uses OPSF features and does not change the current area assignments. You will know that you have corrected the fault when R4's loopback
address (FEC0:4:4) can be seen in RTs IPv6 routing table.

Special Note: To gain the maximum number of points you must remove all incorrect or unneeded configuration statements related to this issue.

The output of the "show running-config" command of R3: .

The area through which you configure the virtual link is known as a transit area. + Configure virtual link on R2 (from the first output above.2.4. Therefore. we learned that the OSPF process ID of R3 is 1 and we have to disable the wrong configuration of "area 54 virtual-link 4.3.2.3.4. we learned that the OSPF process ID of R2 is 1): R2>enable R2#configure terminal R2(config)#ipv6 router ospf 1 R2(config-rtr)#area 11 virtual-link 3. where this is not possible. not R2's router-id 2.4. use the show ipv6 route command. The area through which you configure the virtual link is known as a transit area. where this is not possible. Correct Answer: Answer: Here is the solution below: Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: To troubleshoot the problem.2 Save the configuration: R3(config-rtr)#end R3#copy running-config startup-config You should check the configuration of R4. we learned that the OSPF process ID of R2 is 1): R2>enable R2#configure terminal R2(config)#ipv6 router ospf 1 R2(config-rtr)#area 11 virtual-link 3.4.2.3 Save the configuration: R2(config-rtr)#end R2#copy running-config startup-config (Notice that we have to use neighbor router-id 3.4"): R3>enable R3#configure terminal R3(config)#ipv6 router ospf 1 R3(config-rtr)#no area 54 virtual-link 4.We knew that all areas in an Open Shortest Path First (OSPF) autonomous system must be physically connected to the backbone area (Area 0).3. In some cases.2. not R2's router-id 2. If you want to check the routing information. Therefore. In this case. we can use a virtual link to connect to the backbone through a non-backbone area. .4"): R3>enable R3#configure terminal R3(config)#ipv6 router ospf 1 R3(config-rtr)#no area 54 virtual-link 4.3. we can use a virtual link to connect to the backbone through a non-backbone area.2) + Configure virtual link on R3 (from the second output above. Note.2.3 Save the configuration: R2(config-rtr)#end R2#copy running-config startup-config (Notice that we have to use neighbor router-id 3.3.3. first issue the show running-config on all of 4 routers.3.4. too. In some cases.3. the area 11 will become the transit area.2.4 R3(config-rtr)#area 11 virtual-link 2.3 R4(config-router)#end After finishing the configuration doesn’t forget to ping between R1 and R4 to make sure they work. Make sure to remove the incorrect configuration statements to get the full points. In this case. + Configure virtual link on R2 (from the first output above.3.4 R3(config-rtr)#area 11 virtual-link 2. routers R2 and R3 must be configured with the area <area id> virtuallink <neighbor router-id>command. not "show ip route".3.4. not "show ip route". If you want to check the routing information. R4(config)#ipv6 router ospf 1 R4(config-router)#no area 54 virtual-link 3. too.3.2 Save the configuration: R3(config-rtr)#end R3#copy running-config startup-config You should check the configuration of R4.2) + Configure virtual link on R3 (from the second output above.4.3 R4(config-router)#end After finishing the configuration doesn’t forget to ping between R1 and R4 to make sure they work. we learned that the OSPF process ID of R3 is 1 and we have to disable the wrong configuration of "area 54 virtual-link 4. use the show ipv6 route command. Make sure to remove the incorrect configuration statements to get the full points. routers R2 and R3 must be configured with the area <area id> virtuallink <neighbor router-id>command. R4(config)#ipv6 router ospf 1 R4(config-router)#no area 54 virtual-link 3. Note. Pay more attention to the outputs of routers R2 and R3 The output of the "show running-config" command of R2: The output of the "show running-config" command of R3: We knew that all areas in an Open Shortest Path First (OSPF) autonomous system must be physically connected to the backbone area (Area 0).2.3.3.4.3.2. the area 11 will become the transit area.

and R4 in the network.0 subnets. The remote office router (R3) was previously configured and all corporate subnets were reachable from R3. . Your task is to identify and resolve the cause of connectivity failure with the remote office router R3. You have corrected the fault when pings from R2 to the R3 LAN interface are successful. in the process of configuring EIGRP stub routing connectivity with the remote network devices off of R3 has been lost. R3. Another network professional was tasked with implementing this solution. However. JS Industries is interested in using route summarization along with the EIGRP Stub Routing feature to increase network stability while reducing the memory usage and bandwidth utilization to R3.QUESTION 80 S Industries has expanded their business with the addition of their first remote office.0.0. Currently EIGRP is configured on all routers R2. and the R3 IP routing table only contains 2 10. Once the issue has been resolved you should complete the task by configuring route summarization only to the remote office router R3.

0.0/24.0/8 is a summary…) then we should use the command ip summary-address eigrp 123 10. Therefore we will remove this command and replace it with the eigrp stub command: R3# configure terminal R3(config)# router eigrp 123 R3(config-router)# no eigrp stub receive-only R3(config-router)# eigrp stub R3(config-router)# end Now R3 will send updates containing its connected and summary routes to other routers. to make the routing table of R3 has only 2 subnets we have to summary other subnets into one subnet. We can’t get rid of it in the routing table no matter what technique we use to summary the networks.0 at the interface s0/0 of R4 to summary. . the s0/0 interface of R4.2.0.0.0.3.0 255. Notice that R3 is configured as a stub receive-only router. There is one interesting thing about the output of the show ip route shown above: the 10. Therefore.255.2.0. we will use the ip summary-address eigrp 123 10.255.0.0.0 255. Next we will configure router R3 so that it has only 2 subnets of 10. Use the show ip route command on R3 to view its routing table: Because we want the routing table of R3 only have 2 subnets so we have to summary sub-networks at the interface which is connected with R3.0 network.0 so that all the ping can work well.2. In conclusion. Notice that the eigrp stub command equals to the eigrp stub connected summary because the connected and summary options are enabled by default. This keyword will also prevent any type of route from being sent. which is a directly connected network of R3.0. The receive-only keyword will restrict the router from sharing any of its routes with any other router in that EIGRP autonomous system.Correct Answer: Answer: Here are the solution as below: Section: Layer 3 Technologies Explanation Explanation/Reference: Explanation: First we have to figure out why R3 and R4 can not communicate with each other. Use the show running-config command on router R3. In the output if we don’t see the summary line (like 10.

2. IT policy requires that all outbound HTTP traffic use the frame relay link when it is available. .0 255. the output is shown below: Note: Please notice that the IP addresses and the subnet masks in your real exam might be different so you might use different ones to solve this question.0.0. ROUTE. You may use the Test Workstation to generate HTTP traffic to validate your solution. one via a frame relay link and one via an EoMPLS link. if you use the command ip summary-address eigrp 123 10.0. Finally don’t forget to use the copy run start command on routers R3 and R4 to save the configurations.255. Null0" then you can summarize using the network 10.0.0. Just for your information.0.2.0 you will leave a /16 network in the output of the show ip route command.0/16.0/8 to summary. a small IT company.” QUESTION 81 You are a network engineer with ROUTE.0.2.255. No static or default routing is allowed.com.R4> enable R4# conf t R4(config)# interface s0/0 R4(config-if)# ip summary-address eigrp 123 10.0 Now we jump back to R3 and use the show ip route command to verify the effect. R3(config-if)# end R3# copy run start R4(config-if)# end R4# copy run start If the “copy run start” command doesn’t work then use “write memory. This summarization is better because all the pings can work well. if you don’t see the line "10.0/8 is a summary.0. But in your real exam. All other traffic may use either link. for example. Choose and configure the appropriate path selection feature to accomplish this task. notice that if you use another network than 10.0.com has two connections to the Internet.0 255.

100.2 R1(config-route-map)#exit R1(config)#route-map pbr permit 20 3) Apply the route-map on the interface to the server in the EIGRP Network: R1(config-route-map)#exit R1(config)#int fa0/1 R1(config-if)#ip policy route-map pbr R1(config-if)#exit R1(config)#exit Explanation: First you need to configure access list to HTTP traffic and then configure that access list. You have been tasked with completing the implementation and ensuring that the network requirements are met. a small IT company. A previous network engineer has started the merger implementation and has successfully assigned and verified all IP addressing and basic IGP routing.100.1. QUESTION 82 You are a network engineer with ROUTE. You may add new commands or change default values. R4 has been added to the existing OSPF network to provide the interconnect between the OSPF and EIGRP networks.16. Section: Layer 3 Technologies Explanation Explanation/Reference: Here are the step by Step Solution for this: 1) First create the access list that catches the HTTP traffic: R1(config)#access-list 101 permit tcp any any eq www 2) Configure the route map that sets the next hop address to be ISP1 and permits the rest of the traffic: R1(config)#route-map pbr permit 10 R1(config-route-map)#match ip address 101 R1(config-route-map)#set ip next-hop 10. After that configure the route map and then apply it on the interface to the server in EIGRP network. You may not remove or change any of the configuration commands currently on any of the routers.Correct Answer: Answer: We need to configure policy based routing to send specific traffic along a path that is different from the best path in the routing table. Two links have been added that will provide redundancy.1. All traffic must use the shortest path that provides the greatest bandwidth. No static or default routing is allowed in either network. The redundant paths from the OSPF network to the EIGRP network must be available in case of a link failure. They have recently merged two organizations and now need to merge their networks as shown in the topology exhibit. One network is using OSPF as its IGP and the other is using EIGRP as its IGP. . The network requirements state that you must be able to ping and telnet from loopback 101 on R1 to the OPSF domain test address of 172.com.

MTU=1500 bytes then we would redistribute as follows: R2#config terminal R2(config)# router ospf 1 R2(config-router)# redistribute eigrp 100 metric-type 1 subnets R2(config-router)#exit R2(config-router)#router eigrp 100 R2(config-router)#redistribute ospf 1 metric 1544 2000 255 1 1500 Note: In fact. we must put the command below under EIGRP process to make traffic from R1 to go through R3 (R1 -> R2 -> R3 -> R4). notice that we have to divide the Delay by 10 because the metric unit is in tens of microsecond. . C. MTU) of the s0/0/0 interface (the interface of R2 connected to R4) for redistribution: Section: Layer 3 Technologies Explanation Explanation/Reference: R2#show interface s0/0/0 Write down these 5 parameters.Correct Answer: Answer: First we need to find out 5 parameters (Bandwidth. Delay=20000 us. these parameters are just used for reference and we can use other parameters with no problem. If the delay is 20000us then we need to divide it by 10.100. For example. but no routes have qualified as a feasible successor. MTU=1500 bytes R3#config terminal R3(config)#router ospf 1 R3(config-router)#redistribute eigrp 100 metric-type 1 subnets R3(config)#exit R3(config-router)#router eigrp 100 R3(config-router)#redistribute ospf 1 metric 10000 100 255 1 1500 Finally you should try to “show ip route” to see the 172. which is smaller than the Administrative Distance of OSPF (110) -> the link between R2 & R3 will be preferred to the serial link between R2 & R4. what process will EIGRP use in the selection of a new successor? A. Delay=1000 us. Reliability. R2(config-router)# distance eigrp 90 105 This command sets the Administrative Distance of all EIGRP internal routes to 90 and all EIGRP external routes to 105. Note: If the link between R2 and R3 is FastEthernet link. but the overall solution is the same. that is 20000 / 10 = 2000) For R3 we use the show interface fa0/0 to get 5 parameters too R3#show interface fa0/0 For example we get Bandwidth=10000 Kbit. Note: The actual OPSF and EIGRP process numbers may change in the actual exam so be sure to use the actual correct values. Load=1. Reliability=255. a router has identified a successor route. EIGRP will find the interface with the lowest MAC address The route will transition to the active state The route will transition to the passive state EIGRP will automatically use the route with the lowest feasible distance(FD) Correct Answer: B Section: Mixed Questions Explanation Explanation/Reference: When a route (current successor) goes down. D. the router first checks its topology table for a feasible successor but it can’t find one. Load=1. Load. B. In the event that the current successor goes down. So it goes active on the that route to find a new successor by sending queries out to its neighbors requesting a path to the lost route.1 network (the network behind R4) in the routing table of R1 and make a ping from R1 to this network. QUESTION 83 After DUAL calculations.16. we get Bandwidth=1544 Kbit. Delay. Reliability=255. which is better than R1 -> R2 -> R4.

Reply. Query. Update. C. The neighbor's advertised distance must be less than or equal to the feasible distance of the current successor. EIGRP sends periodic hello packets to the multicast IP address 224.ietf. Correct Answer: CD Section: Mixed Questions Explanation Explanation/Reference: Reviewed and updated QUESTION 89 . C. EIGRP will not form a neighbor relationship with another peer when their AS number and K values. where the access interface bandwidth and the PVC capacity may be very different. B. D. The neighbor's advertised distance must be greater than the feasible distance of the current successor. and ACK packets. because the Frame Relay spokes could be segmented into their own areas. The neighbor's advertised distance must be equal to the feasible distance of the current successor.0. C. Which statement about the selection of a dynamic protocol is true? A. whereas OSPF uses a default value of 20. but not all of the expected routes. Correct Answer: D Section: Mixed Questions Explanation Explanation/Reference: By default. RIP IS-IS OSPF EIGRP Correct Answer: AD Section: Mixed Questions Explanation Explanation/Reference: Metrics must be set manually via configuration when redistributing into RIP and EIGRP. EIGRP would be appropriate. This is of particular benefit on Frame Relay networks.) A. EIGRP will limit itself to using no more than 50% of the interface bandwidth. EIGRP would be appropriate if LMI type ANSI is NOT used. C. The feasibility condition states that the AD from a neighbor must be less than the metric of the successor route (the feasible distance [FD]) because routing through a feasible successor when the AD > FD may cause a routing loop. The missing EIGRP routes are present in the routing table of the border router. Updated Question QUESTION 87 Your network consists of a large hub-and-spoke Frame Relay network with a CIR of 56 kb/s for each spoke.10. This route does NOT get installed in the routing table but is kept in the topology table. because by default. queries are not propagated across the slow speed Frame Relay links. B. The border router is using a proper seed metric for EIGRP. QUESTION 88 You have implemented mutual route redistribution between OSPF and EIGRP on a border router. C. EIGRP would be appropriate. D.asp?p=27839 QUESTION 85 Which two routing protocols require a metric to be configured when redistributing routes from other protocols? (Choose two. which could occur when EIGRP generates data faster than the interface line can absorb it. The subnet keyword on the border router in the redistribute EIGRP command. D. Which two things should you verify to troubleshoot this problem? (Choose two.txt (see eigrp packets) http://www. EIGRP would be appropriate. The primary benefit of controlling EIGRP’s bandwidth usage is to avoid losing EIGRP packets. Correct Answer: ABD Section: Mixed Questions Explanation Explanation/Reference: Reference: http://www. QUESTION 86 Which condition must be satisfied before an EIGRP neighbor can be considered a feasible successor? A. either or both are mismatched. D.com/articles/article. D. The neighbor's advertised distance must be less than the feasible distance of the current successor. including Hello. B.0.) A. you are seeing some. EIGRP supports five generic packet types. B. EIGRP will form a neighbor relationship with another peer even when their K values are mismatched. because you can manage how much bandwidth is consumed over the Frame Relay interface. The administrative distance is set for OSPF and EIGRP.ciscopress.org/id/draft-savage-eigrp-00. Correct Answer: B Section: Mixed Questions Explanation Explanation/Reference: The feasible successor route is a route which has a higher metric than the successor route to reach a subnet but meets the feasibility condition and can be used in the event that the successor route goes down. B.QUESTION 84 Which three statements about the EIGRP routing protocol are true? (Choose three) A. When checking the routing table on one of the OSPF routers within the OSPF routing domain.

updates. D. 21/14 Reference:http://www. D. Correct Answer: B Section: (none) Explanation Explanation/Reference: QUESTION 92 Router R1. C. as well as statistics on hello packets. 218/205 Updates sent/received. The ACL also denies packets going to the Enterprise. The router will determine the IPv4 destination address. Which of the following answers defines how the branch NAT config avoids performing NAT for the Enterprise directed traffic but does perform NAT for the Internet-directed traffic? A. The branch also allows local hosts to communicate directly with public sites in the Internet over this same DSL connection.Which command will display EIGRP packets sent and received. As a result. B.html#wp1018815 Answer Corrected and explained. Which statement is correct regarding the operation of NAT-PT between the IPv4 and IPv6 networks shown? A. D. B. . C.cisco. C. D. B. 7/23 Queries sent/received. and into the core of an Enterprise network. debug eigrp packets show ip eigrp traffic debug ip eigrp show ip eigrp interfaces Correct Answer: B Section: Infrastructure Services Explanation Explanation/Reference: The show ip eigrp traffic command displays the number of Enhanced IGRP (EIGRP) packets sent and received. the ACL can permit packets destined for the Internet. ICMP can be used to determine the IPv6-to-IPv4 address mapping. The host is statically configured with the IPv6-to-IPv4 address mapping. Router# show ip eigrp traffic IP-EIGRP Traffic Statistics for process 77 Hellos sent/received.com/en/US/products/sw/iosswrel/ps1828/products_command_reference_chapter09186a00800ca5a9. B. meaning that the router does not apply NAT to those packets. performing NAT on those packets. By not enabling NAT on the IPsec tunnel interface By not enabling NAT on the GRE tunnel interface By configuring the NAT-referenced ACL to not permit the Enterprise traffic By asking the ISP to perform NAT in the cloud Correct Answer: C Section: Network Principles Explanation Explanation/Reference: The NAT configuration acts only on packets permitted by a referenced ACL. and acknowledgments? A. 0/2 Acks sent/received. over the DSL connection. connects to the Internet using DSL. QUESTION 91 Refer to the exhibit. QUESTION 90 Which of the below mentioned conditions form a neighbor relationship in EIGRP? (Choose three) A. C. Hello or ACK received AS number match Hello timer match Identical metric (k values) Correct Answer: ABD Section: Mixed Questions Explanation Explanation/Reference: Fixed the answers. Example: The following is sample output from the show ip eigrp traffic command. Some traffic flows through a GRE and IPsec tunnel. replies. 2/0 Replies sent/received. The source IPv6 host can use DNS to determine the IPv6-to-IPv4 address mapping. a branch router. queries.

C. D.QUESTION 93 Refer to the exhibit. The crypto map is not applied to the correct interface. but the tunnel is not coming up. What did the TAC engineer configure incorrectly? A. The crypto map is not configured correctly. The crypto ACL is not configured correctly. A GRE over IPsec tunnel was configured. The OSPF network is not configured correctly. A new TAC engineer came to you for advice. B. Correct Answer: B Section: Mixed Questions Explanation Explanation/Reference: QUESTION 94 Drag drop Select and Place: Correct Answer: Section: Network Principles Explanation .

B. R2(config)# access-list 20 deny any R2(config)# router eigrp 1 R2(config-router)# distribute-list 20 out serial 0 Correct Answer: C Section: Network Principles Explanation Explanation/Reference: We can not use passive-interfaces to accomplish this task because the “passive-interface…” command (in EIGRP or OSPF) will shut down the neighbor relationship of these two routers (no hello packets are exchanged).1.1 to the hello message sent out inquiring for a second successor to network 10.1.2. the CIR rate of the lowest speed connection multiplied by the number of circuits the CIR rate of the lowest speed connection the CIR rate of the highest speed connection the sum of all the CIRs divided by the number of connections Correct Answer: A Section: Network Principles Explanation Explanation/Reference: If the multipoint network has different speeds allocated to the VCs. On a basis of the show ip eigrp topology output provided. regardless of the actual CIR of each individual PVC. what conclusion can be derived? A. C.0/24 Correct Answer: D Section: Network Principles Explanation .1. C.2. B.2. QUESTION 97 Refer to the exhibit. so we have to get the lowest speed CIR rate and multiply it by the number of circuits. What should the bandwidth command be set to? A. R1(config)# router eigrp 1 R1(config-router)# passive-interface serial 0 B. Which configuration command sequence will successfully accomplish this task? A. This result will be applied on the main interface (or multipoint connection interface). And to filter routing updates we should configure a distribute list on R1 with an access list that deny all and apply it to the outbound direction so that R1 can receive but cannot send routing updates. R1(config)# access-list 20 deny any R1(config)# router eigrp 1 R1(config-router)# distribute-list 20 out serial 0 D. QUESTION 96 EIGRP has been configured to operate over Frame Relay multipoint connections. but not advertise any routes to R2.6.1 in response to the query sent about network 10.Explanation/Reference: QUESTION 95 Refer to the exhibit.6.1 to the hello message sent out before it declares the neighbor unreachable Router R1 is waiting for a reply from the neighbor 10.0/24 out of interface FastEthernet0/0 Router R1 is waiting for a reply from the neighbor 10. Routers R1 and R2 have established a neighbor relationship and are exchanging routing information. Router R1 can send traffic destined for network 10. EIGRP is configured on all routes in the network.1. D. D. R2(config)# router eigrp 1 R2(config-router)# passive-interface serial 0 C. take the lowest CIR and simply multiply it by the number of circuits. The network design requires that R1 receive routing updates from R2.0/24 Router R1 is waiting for a reply from the neighbor 10.6.1. This is because in Framerelay all neighbors share the bandwidth equally.1.

a query packet was sent to this destination.or EIGRP-derived network in the routing table. Gateways of last resort selected using the ip default-network command are propagated differently depending on which routing protocol is propagating the default route.com/ccnp-route-642-902-vpns-and-ipsec/ QUESTION 100 What is the purpose of configuring the router as a PPPoE client? A. or the static route used to generate the route to the network must be redistributed into IGRP or EIGRP.0 10.0.ccnpguide.1 R4(config-router)# default-information originate Correct Answer: A Section: Network Principles Explanation Explanation/Reference: Unlike the ip default-gateway command. an update packet was sent to this destination.0.0. D. you can use ip default-network when ip routing is enabled on the Cisco router.cisco.0 0.0 R4(config)# ip route 0. D.shtml#ipnetwork QUESTION 99 Which two methods use IPsec to provide secure connectivity from the branch office to the headquarters office? (Choose two. the network specified by the ip default-network command must be known to IGRP or EIGRP.) A. R— Reply. Reference: http://www. What additional configuration statement should be included on router R4 to advertise a default route to its neighbors? A.1. C.Explanation/Reference: The “show ip eigrp topology” command lists all routes that EIGRP is aware of and shows whether EIGRP is actively processing information on that route. C.0. QUESTION 98 Refer to the exhibit.1. D. B.0. state.0. For every network configured with ip default-network. which bridges the Ethernet frames from the router to the cable modem termination system Correct Answer: C Section: Network Principles Explanation Explanation/Reference: DSL Technology used PPPoE protocol (service provide end) and user end required to be used same Protcol running as client to communicate with it  QUESTION 101 What is the international standard for transmitting data over a cable system? . no EIGRP computation is being performed.0 10. C. B. the 10. the routes should all be in a passive state and no EIGRP process are running for that route. EIGRP computations are "actively" being performed for this destination. or SIA. U— Update. EIGRP has been configured on all routers in the network. B. this could indicate the dreaded stuck in active.com/en/US/tech/tk365/technologies_tech_note09186a0080094374. This means the network must be an IGRP. or the feasible successor. For IGRP and EIGRP to propagate the route. Routes constantly appearing in an active state indicate a neighbor or query problem. or advertised into these protocols using the network command.1 R4(config)# ip route 10.0 255. or next hop to that network. If the routes are active. if a router has a route to that network. its subnet mask. In this case. When you configure ip default-network the router considers routes to that network for installation as the gateway of last resort on the router. a reply packet was sent to this destination. Under most normal conditions.1.0. Both are symptoms of the SIA problem. This is the ideal state. DMVPN MPLS VPN Virtual Tunnel Interface (VTI) SSL VPN Correct Answer: AC Section: Layer 3 Technologies Explanation Explanation/Reference: Reference: http://www. A— Active.0. Route information— IP address of the route or network. Q— Query.0.0.0. and the successor. that route is flagged as a candidate default route.1. The fields to note in this output are as follows: P— Passive.0 network is indeed being advertised via EIGRP. to provide VPN access over L2TP to enable PPP session from the router to the termination device at the headend for metro Ethernet connectivity for DSL connectivity and removing the need for the end-user PC to run the PPPoE client software for connecting the router to a cable modem. R4(config)# ip default-network 10.0.

B.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps9932/at_a_glance_c45-562587.A. Place the IP addresses assigned to the tunnels in different subnets and there won’t be any connectivity over the tunnels… that is unless you place static routes at both endpoints pointing to the remote tunnel IP address via the tunnel. which of the following must be configured? A.cablelabs. They also don’t require dynamic routing. What are three important benefits of this device? (Choose three) A.pdf (Page 1. B. C. PPPoE DOCSIS CMTS AAL5 Correct Answer: B Section: Layer 3 Technologies Explanation Explanation/Reference: http://www. C. Correct Answer: D Section: Mixed Questions Explanation Explanation/Reference: GRE tunnels don’t require loopbacks. QUESTION 106 Refer to the exhibit. B. authentication. PPPoA PPPoE PPP L2TP Correct Answer: B Section: Network Principles Explanation Explanation/Reference: http://www. . D.vicomsoft. B. Tunneling protocol developed by Cisco that can encapsulate a wide variety of protocol packet types inside IP tunnels. D. D.cisco. Tunnel interfaces must be in the same subnet. Host routes work just fine. integrity checking. C. B. creating a virtual point-to-point link to Cisco routers at remote points over an IP internetwork. D.html (see first para) QUESTION 102 What is a key benefit of using a GRE tunnel to provide connectivity between branch offices and headquarters? A. static routes work just fine. and confidentiality less overhead dynamic routing over the tunnel granular QoS support Correct Answer: C Section: Layer 3 Technologies Explanation Explanation/Reference: Generic routing encapsulation. see key features and benefits) QUESTION 105 For a GRE tunnel to be up between two routers.com/news/pr/1998/1998_03_19. QUESTION 103 Which DSL encapsulation method requires client software running on the end-user PC that is directly connected to a DSL modem? A. business-grade firewall premium support via SMART net site-to-site VPN for remote offices email security Correct Answer: ACD Section: Mixed Questions Explanation Explanation/Reference: http://www. They work quite well using physical interfaces as the source and destination.com/learning-center/pppoe/ QUESTION 104 The Cisco SA 500 Series Security Appliances are built specifically for businesses with less than 100 employees. C. C. D. Loopback Interface IP reachability between the loopback interfaces Dynamic Routing between routers.

Split horizon blocks route information from being advertised by a router out of any interface from which that information originated. Whether EIGRP autonomous number is the same. Disabling Split horizons on interface S0/0 on RTA will fix this issue. Incorrect answers: *. This reduces the possibility of routing loops. 1.Router RTA is the hub router for routers RTB and RTC. Correct Answer: E Section: Network Principles Explanation Explanation/Reference: Explanation: Split horizon controls the sending of EIGRP update and query packets. Configure subinterfaces on the spoke routers and assign different IP address subnets for each subinterface. C. However. When split horizon is enabled on an interface. The Frame Relay network is configured with EIGRP.not EIGRP. EIGRP use multicast. Correct Answer: D Section: Network Principles Explanation Explanation/Reference: Explanation: The point of this question is about the condition of establish EIGRP neighbor. you may want to disable split horizon. so they are not receiving each other`s routes. not broadcast. *. Hello and hold timers match is the condition of establish OSPF neighbor. . By default. and the entire network is in autonomous system 1. split horizon is enabled on all interfaces. In this example. QUESTION 108 Refer to the exhibit. you notice that two connected EIGRP routers are not becoming EIGRP neighbors. router RTB and RTC are not receiving each other's routes. 2. these packets are not sent for destinations for which this interface is the next hop. However. not broadcast. A ping between the two routers was successful. Configure the auto summary command under router eigrp 1 on router RTA. situations can arise for which this behavior is less than ideal. C. Issue the no ip split horizon command on router RTA. Whether EIGRP is enabled for the proper networks. This behavior usually optimizes communications among multiple routing devices. E. *. routes received by RTB and RTC are not being sent back out the same serial interface on RTA. For these situations. Issue the no ip split horizon eigrp 1 command on router RTA. particularly when links are broken. F. Configure a distribute list on router RTA that allows it to advertise all routes to the spoke routers. with nonbroadcast networks (such as Frame Relay and SMDS). D. Verify that the EIGRP hello and hold timers match exactly. EIGRP use multicast. B. Verify that EIGRP is enabled for the appropriate networks on the local and neighboring router. 3. B. Check and change the access lists on router RTA. D. Verify that EIGRP broadcast packets are not being dropped between the two routers with the show ip EIGRP peer command. What is the next thing that should be checked? A. What is the solution? A. Whether the K values of EIGRP neighbors is the same. You can use these ways to troubleshoot the EIGRP connectivity problem. Verify that EIGRP broadcast packets are not being dropped between the two routers with the show ip EIGRP traffic command. QUESTION 107 When troubleshooting an EIGRP connectivity problem.

You have been tasked to implement a hub and spoke EIGRP topology over Frame Relay to provide connectivity between the networks at headquarters and all 300 spokes. which three pieces of information are more important to know than the others? (Choose three.) A.com company is running EIGRP between all the routers. C. As per the topology. the Committed Information Rate of all the Frame Relay PVCs the Cisco IOS version running on all the routers the router model number of all the spoke routers the number of HQ networks connected behind the headquarter routers the routing policy. Verify that the HQ-RTR1 and HQ-RTR2 routers are configured for EIGRP Nonstop Forwarding. You also need to know the IOS version on all routers so that there is no conflict in versions. Correct Answer: E Section: Network Principles Explanation Explanation/Reference: Explanation: Stub routing is commonly used in a hub and spoke network topology. B. As the new network administrator. if one of the LAN links (LAN1 or LAN2) at the headquarters flaps (goes up and down). D. This type of configuration is commonly used in WAN topologies where the . the HQ-RTR1 and HQ-RTR2 routers will experience high CPU usage and have a long EIGRP convergence time. Currently. E. C. Before you begin the actual implementation. Which is the most important thing that you can quickly verify first to resolve this issue? A.com company. The only route for IP traffic to follow into the remote router is through a distribution router. Verify that all the spoke routers are configured as EIGRP stub. you are asked to investigate this situation and determine if there is a quick way to resolve this issue. The Route. Verify that all the spoke routers are configured for auto summarization.You are the network administrator of the Route. one or more end (stub) networks are connected to a remote router (the spoke) that is connected to one or more distribution routers (the hub). D. In a hub and spoke network. such as whether or not the spokes can be used as backup transient point between the two headquarter routers Correct Answer: ABE Section: Mixed Questions Explanation Explanation/Reference: Explanation: You have to know the committed information rate because it is a bandwidth associated with logical connection in a PVC. Verify that the HQ-RTR1 and HQ-RTR2 routers are configured to send only a default route to all the spoke routers. E. you need to know the routing policy because it will be used as a backup transient point between headquarter routers QUESTION 109 Refer to the exhibit. Verify that the bandwidth setting on all WAN links is correct. B. The remote router is adjacent only to one or more distribution routers.

2. B. E. The amount of bandwidth used for EIGRP routing protocol traffic on the 256 kb/s link can become excessive.1. and a router that has a stub peer will not query that peer. you are not able to see the R1 Ethernet subnet on the R4 routing table. When you examine the routing tables of R1 and R4.) A. QUESTION 111 Refer to the exhibit. R1 and R4 R2 and R3 ip summary-address eigrp 1 10. When using the EIGRP Stub Routing feature. The stub router will depend on the distribution router to send the proper updates to all peers. The actual speed of the serial links between R2 and R3 are 256 kb/s and 512 kb/s. Often.cisco. E. and select the required EIGRP configuration command(s). the EIGRP traffic will become excessive because it uses only the actual bandwidth. Choose two answers. external routes.255.0 and ip summary-address eigrp 1 10.com/en/US/docs/ios/12_0s/feature/guide/eigrpstb. The interface "delay" value used in the EIGRP metric calculation will be inaccurate on the 256 kb/s serial interface.255. connected routes.255. Reference: http://www. you need to configure the distribution and remote routers to use EIGRP. the routing is going through R2 and R3 to reach R4. (Choose two. . the distribution router need not send anything more than a default route to the remote router. You are also not able to see the R4 Ethernet subnet on the R1 routing table. What will be the effect? A. Unequal cost load balancing will be disabled. Only specified routes are propagated from the remote (stub) router. redistributed static routes. the distribution router will be connected to 100 or more remote routers.0 255. Any neighbor that receives a packet informing it of the stub status will not query the stub router for any routes. and to configure only the remote router as a stub. the remote router must forward all nonlocal traffic to a distribution router.distribution router is directly connected to a WAN. The distribution router can be connected to many more remote routers. EIGRP can load balance between the two serial links only if the variance is set to 2 or higher. In a hub and spoke topology. Also you need to set auto-summary to No. So the two routers that need configuration change are R2 and R3. The no auto-summary command configures classless routing protocols such as RIPv2 and EIGRP to really act as classless because by default they're classfull.html QUESTION 110 Refer to the exhibit." A router that is configured as a stub will send a special peer information packet to all neighboring routers to report its status as a stub router. C. D. When configuring EIGRP on routers R2 and R3. Which two configuration changes should be made to resolve this issue? Select the routers where the configuration change will be required. so it becomes unnecessary for the remote router to hold a complete routing table.255. Generally.1.0 255. the network administrator configured the bandwidth of both serial interfaces to 512 kb/s. EIGRP will over utilize the 512 kb/s link. Correct Answer: C Section: Network Principles Explanation Explanation/Reference: Explanation: If you assign more bandwidth than what is available between R2 and R3.2. F. and internal routes with the message "inaccessible. B. C.0 variance 2 eigrp stub connected no auto-summary Correct Answer: BF Section: Network Principles Explanation Explanation/Reference: Explanation: Of course. The router responds to queries for summaries. D.

including the main path (successor path) QUESTION 113 Refer to the exhibit. The feasible condition states: "To qualify as a feasible successor. a router must have an AD less than the FD of the current successor route" The FD of the current successor route here is 30 (notice that the variance number is not calculated here).B-E-H & A-F-E-H. traffic from the Internet to the data center will be load balanced across how many paths? A. Besides the main path A-D-E-H we have 4 more paths that have the metric of less than or equal to 60 (we also include the Advertised Distances of these routes for later comparison): + A-B-E-H with an AD of 20 + A-D-E-B-C-H with an AD of 50 + A-F-G-H with an AD of 40 + A-F-E-H with an AD of 20 Now the last thing we need to consider is the feasible condition. . C. In conclusion. the minimum metric is increased to 60 (30 * 2) and all the routes that have a metric of less than or equal to 60 and satisfy the feasibility condition will be used to send traffic.com has just implemented this EIGRP network. E. A network administrator came to you for advice while trying to implement load balancing across part of their EIGRP network. D. B. traffic from the Internet to the data center will be load balanced across 3 paths. 1 2 3 4 5 Correct Answer: C Section: Network Principles Explanation Explanation/Reference: Explanation First we should list all the paths from the Internet to the data center: + A-B-C-H with a metric of 70 (40 + 15 + 15) + A-B-E-H with a metric of 60 (40+10+10) + A-D-E-H with a metric of 30 (10+10+10) + A-D-E-B-C-H with a metric of 60 (10+10+10+15+15) + A-D-E-F-G-H with a metric of 70 (10+10+10+20+20) + A-F-G-H with a metric of 60 (20+20+20) + A-F-E-H with a metric of 40 (20+10+10) So the path A-D-E-H will be chosen because it has the best metric. By configuring the variance value of 2. If the variance value is configured as 2 on all routers and all other metric and K values are configured to their default values. ROUTE. But EIGRP can support unequal cost path load balancing.QUESTION 112 Refer to the exhibit. Therefore there are only 2 paths that can satisfy this conditions: the path A.

Add IP summary addresses to the Internet-pointing interfaces of routers N1 and B1.0. Turn off auto summarization on routers N2 and B2.. as their networks wouldn't be summarized due to the fact that they are not meeting a classful boundary on their perspective routers. The show command output shows that traffic will not flow between the networks. QUESTION 114 Refer to the exhibit.0/8).16.0/16 and 10. Add wildcard masks to the network commands on routers N2 and B2. C. N1 will receive the 172. you would have an issue with discontiguous networks being advertised by both routers N1 and B1 with their classful mask (172.0/24 to the 172.0.0/16 classful networks. .0.0/24 subnet.so that would make N1 and B1 the locations that summarization would occur for the 172. Which configuration change do you recommend? A.16. Turning off auto-summarization on N2 and B2 wouldn't make any difference. So if you left auto-summarization enabled on those 2 routers. For traffic to flow from subnet 172. D.0/24 network from N2 with auto-summarization enabled. which will cause you issues. As a network consultant.16. you were asked to modify the configuration and certify the interoperability of the two networks.16.16.0. Correct Answer: A Section: Infrastructure Services Explanation Explanation/Reference: Explanation: Basically auto route summarization happens at the classful network boundary.8.16.. Turn off autosummarization on routers N1 and B1.8. B.A Boston company bought the assets of a New York company and is trying to route traffic between the two data networks using EIGRP.

16.0 and 10.0/8)..10.0 and no configuration changes are needed. . Traffic is flowing between the 172. router added/removed)..16.0. Correct Answer: C Section: Mixed Questions Explanation Explanation/Reference: Explanation The load metric (k2) represents the worst load on a link between source and destination. However.0 subnet.0 subnet and the 172.16. Auto-summary must be disabled on N1 and B1 before traffic can flow between the 172. as their networks wouldn't be summarized due to the fact that they are not meeting a classful boundary on their perspective routers. Turning off auto-summarization on N2 and B2 wouldn't make any difference.16. interfaces go up/down. From the show ip route command output. A change in the load on an interface will cause EIGRP to recalculate the routing metrics and send a corresponding update out to each of its neighbors. what can you tell the customer about the traffic flow between the subnet in New York (172.0 subnet and subnets 172.16.16.0/24)? A.16.0 subnet and 10.0 subnet and 172.8.16.16. Traffic will flow between the 172.16.16. As a network consultant.16.8.0/24 and 10.10. D. auto-summary must be disabled on N1 and B1 before traffic can flow between the 172. traffic will flow between the 172.16.0 and 10.0 without any further configuration changes.0 without any further configuration changes.16.0 subnet and subnets 172.10.16.16.10.so that would make N1 and B1 the locations that summarization would occur for the 172.16.8.0/16 classful networks.0 subnet.16. B. you would have an issue with discontiguous networks being advertised by both routers N1 and B1 with their classful mask (172. and not by change in interface load or reliability. However.16.8.0/16 and 10. Auto-summary must be disabled on N1 and B1 before traffic can flow between the 172.0. C. A change in the load on an interface will cause EIGRP to recalculate and update the administrative distance for all routes learned on that interface.10. Correct Answer: B Section: Mixed Questions Explanation Explanation/Reference: Explanation: Basically auto route summarization happens at the classful network boundary.16.0/24) and the subnets in Boston (172. EIGRP considers the load of an interface only when sending an update for some other reason. EIGRP calculates interface load as a 5-minute exponentially weighted average that is updated every 5 minutes. EIGRP routing updates are triggered only by a change in network topology (like links. C.16. The load is a five minute exponentially weighted average that is updated every five seconds (not five minutes) .8.16.8.0.16. you were asked to verify the interoperability of the two networks.0. QUESTION 115 Which statement about a non-zero value for the load metric (k2) for EIGRP is true? A. which will cause you issues.8.A Boston company bought the assets of a New York company and is trying to route traffic between the two data networks using EIGRP over EoMPLS.0. So if you left auto-summarization enabled on those 2 routers. B.0 subnet and the 10.16. D.

Correct Answer: ABD Section: Network Principles Explanation Explanation/Reference: Explanation .0/24 route in the routing table of R3 is 170. B.0/24 route to appear in the routing table of R2 as an D EX route.0/8 route will have an administrative distance of 120 and a hop count of 6. the 4.0/24 route appears as an O E2 route. On R5. the 10.EIGRP considers the load of an interface only when sending an update for some other reason (like a link failure) QUESTION 116 Refer to the exhibit.34 is summarized to 116.0. Both routing protocols must have unique autonomous system numbers for redistribution to function correctly. Default metrics are not configured under EIGRP. when redistribute into EIGRP from OSPF. D.1.16.0. The administrative distance of the 172. B. C. Correct Answer: C Section: VPN Technologies Explanation Explanation/Reference: Explanation Same as RIP. E. the 172. Why are the EIGRP neighbors for this router not learning the routes redistributed from OSPF? A. On R4. the default metric is infinite -> We must set a seed metric when redistributing into EIGRP.0. Which three statements are true? (Choose three.1. thus the OSPF network 116. which is already covered by the EIGRP protocol. Below lists the default seed metrics when redistributing from a routing protocol into another: QUESTION 117 Refer to the exhibit.) A.34. C.1.1.0.16.16. Auto-summary causes the OSPF routes redistributed into EIGRP to be summarized. Redistribution must be enabled mutually (in both directions) to work correctly.0/24 route has a metric of 20. D.1. The R3 S0/0 interface should not need the no ip split-horizon eigrp 1 configuration command for the 172.16. On the routing table of R4.

If we use RIPv2 on R1. because R2 is missing the default seed metric for OSPF.1. An incorrect distribute-list can block some routes and we can`t see it in other EIGRP routers. B. Besides OSPF doesn`t need to specify seed metric as all external routes get a default metric of 20 (except for BGP.1. Notice that the cost of E2 type is always the cost of external route only. the default route type is E2. you are seeing some. Correct Answer: E Section: Mixed Questions Explanation Explanation/Reference: Explanation RIPv1 is a classful routing protocol so the subnet 10. D. Notice that even if the auto-summary command is configured under router eigrp 1 of R1 but when redistributing into another routing protocol EIGRP still advertises the detailed network.1.0. The border router is using a proper seed metric for EIGRP.0/24 will be summarized to 10. What should you verify to troubleshoot this problem? A. The sunbet keyword is only used when redistributing into OSPF. but not all of the expected routes.0. The default administrative distance for external routes redistributed into EIGRP is 170 so we don`t need to set it . We must specify seed metrics when redistributing into EIGRP (and RIP). If not all the redistributed routes will not be seen but the question says only some routes are missing. E. QUESTION 120 Refer to the exhibit. C. C. Suboptimal routing will occur due to mutual route redistribution occurring on R1 and R2.0/24 subnet will appear as 10.0 subnet will appear in the routing table of R5. Looking at the topology diagram and the partial router configurations shown.1.0. Also. E.1. R5 and use the no auto-summary command on R1 then the 10. the external EIGRP routes have an administrative distance of 170 by default QUESTION 118 Refer to the exhibit. The missing OSPF routes are present in the routing table of the border router. which is 1) When redistributing into EIGRP.0. The 10. B. which statement is true? A. R2 will not be able to redistribute the EIGRP subnets into OSPF.0/8 in the R5 routing table. not to other routing protocols .1.When redistributing into OSPF. the default seed metric when redistributing into OSPF is always 20 (except for BGP. The border router is using a proper seed metric for OSPF. Correct Answer: D Section: Mixed Questions Explanation Explanation/Reference: Explanation We are checking the routing table on EIGRP routers not OSPF so we don`t need to check the seed metric for OSPF. Additional route filtering configurations using route maps and ACLs are required on the R1 and R2 routers to prevent routing loops.0/8 in the R5 routing table. When checking the routing table on one of the EIGRP routers within the EIGRP routing domain. D. The subnet keyword on the border router in the redistribute OSPF command. A routing loop will occur due to mutual route redistribution occurring on R1 and R2. The administrative distance is set for OSPF and EIGRP. . which is 1). QUESTION 119 You have implemented mutual route redistribution between OSPF and EIGRP on a border router. We should check the routing table of the border router to see the missing OSPF routes are there or not.

0. In the output above we learn that EIGRP is using 2 successors to send traffic.x. E. You have been asked to configure R1 so that a default route is generated to its downstream neighbors (191.20. B.0.0.0. router eigrp 190 redistribute static ! ip route 0. You want to use all the routes in the EIGRP topology for IP load balancing Which two EIGRP subcommands would you use to accomplish this goal? (Choose two.0 Correct Answer: A Section: Network Principles Explanation Explanation/Reference: Explanation: Since you are running EIGRP and you have other routers that need a default route. By using the variance 2 command we can share traffic to other feasible successor routes.255 Null0 D. Which commands would create this configuration? A.x.x sub-command in the router eigrp 100 routing table. But by default.1 and 192.All EIGRP load balancing parameters are set to their defaults. R1 accesses the Internet using E0/0.0.) A. So we need to use the maximum-paths 6 to make sure all of these routes are used.0 255.0. router eigrp 190 redistribute static ! ip route 0.0. Since 2 are default routes they are only used on the router that they are configured on.0. EIGRP only shares traffic to 4 paths.0 C. D. QUESTION 122 Refer to the exhibit. C.20. you can use EIGRP to distribute that without having to program static routes in each.255.0 Null0 B.0.0 0. traffic-share balanced distance maximum-paths default-network variance Correct Answer: CE Section: Mixed Questions Explanation Explanation/Reference: Explanation Notice that the maximum-paths command is used to share traffic to equal cost path while the variance command can share traffic to unequal cost path.255.0. ip default-network 20. QUESTION 121 Refer to the exhibit. This will essentially publish this route the same as if it were programmed in with the network x. ip default-network 20. . The first option has you configure the static route as well as a way to redistribute that route to other routers connecting to you via EIGRP.0.0.1).

0 A default-network cannot be redistributed between routing processes.0 0.0.0.0.0 QUESTION 123 Refer to the exhibit. which is the default route Note: any equals 0.0/0.A partial routing configuration is shown. E.0.0 means permit any source address with the destination of 0.0 Correct Answer: D Section: Network Principles Explanation Explanation/Reference: Explanation: .0.0.0.0.cisco.0. Which ACL statement completes the configuration correctly? A.0 0. F.0.com/en/US/tech/tk365/technologies_tech_note09186a008009487e. Correct Answer: C Section: Mixed Questions Explanation Explanation/Reference: Explanation The command access-list 100 permit ip any host 0.0.0.0.0.0.1.0 0.0 0.0 equals 0.6 0. router rip router eigrp 10 redistribute eigrp 10 redistribute rip default-metric 10000 100 255 1 1500 default-metric 5 Correct Answer: ACF Section: VPN Technologies Explanation Explanation/Reference: Reference: http://www.255. B. D.0. B. D.shtml#ri p QUESTION 124 You want the redistributed EIGRP AS 10 routes to have an administrative distance of 121 when they appear as RIP routes in the routing table of A1. access-list 100 permit ip 0.255 host 0. Complete the configuration so that only the default.1.0.0 255. redistribute eigrp 10 metric 121 redistribute rip metric 121 default-metric 121 distance 121 10.0.0. C.0. C. B. C. D.255.0 access-list 100 permit ip host 0.0.0.0.0 any access-list 100 permit ip any host 0.) A.0. Which three commands should be used on router B1 to redistribute the EIGRP AS 10 routes into RIP? (Choose three.0.0.network is redistributed from EIGRP 190 into EIGRP 212. Which command should you use on a router to accomplish this goal? A.

EIGRP allows you to make full use of your redundant links that could be in place just to have for back up but you are paying out a lot of money just to sit there and do nothing. D. QUESTION 125 Refer to the exhibit. EIGRP makes it easy for us the network engineers to make this happen. Reference: http://ericleahy.If you add that route back with an administrative distance of 121. They have determined that they can no longer continue using static routes and must implement a dynamic routing protocol. They want to have data use multiple paths to the destinations. also refereed to as Load Balancing sometimes. QUESTION 126 ACME Rocket Sleds is growing. and F. D. what feature can be used to ensure that routers C through F are not used as transit routers for data traveling from router B to network 10. and F. routers A and B will not try to transit traffic through these routers. Before jumping in the in`s and out lets run through a few things first when it comes to EIGRP Load Sharing. For example.1. Use passive-interface on the spoke links in routers A and B. D.1. Use the EIGRP Stub feature on routers C. E. and so is their network. In a redundant hub-and-spoke deployment using EIGRP. B. Which routing protocol has the ability to do this? A. F. EIGRP has a really cool feature that allows you to share the load of your traffic across multiple links and not just links that have the same cost values.1. E. and F. D. B. the ASA will still prefer the route learned via RIP because it prefers the route with a lower administrative distance. E. if the network connecting from routers A and B is down. Correct Answer: B Section: Network Principles Explanation Explanation/Reference: Explanation By configuring stub feature on routers C D E and F. C. E. Change the administrative distance in routers A and B for routes learned from routers C. Use address summarization at routers C.php/eigrp-equal-and-unequal-cost-load-sharing/ QUESTION 127 . EIGRP OSPF RIPv1 RIPv2 BGP IS-IS Correct Answer: A Section: Mixed Questions Explanation Explanation/Reference: Explanation: Unlike most internal routing protocols.1.0? Select the best response A. router B will not send to network 10.com/index. even if the paths are not equal cost.0/24.1. D.1. C.0/24 from router B -> routerC/D/E/F -> router A -> network 10.

Each summarizing router would be an ABR. Not totally sure about answer C because if we use a mask with the network command to exclude interface Serial0/0/0 then router A and B can not become neighbors and the situation is same as answer B.Refer to the exhibit. Unless configured otherwise. Which statement about dynamic routing protocols for this network is true? A. maybe C is the best answer. EIGRP can be manually configured to summarize prefixes at the specified summarization points. EIGRP is to be implemented on router A so that neither the prefix for the S/0/0/0 interface nor the prefixes from router B appear in the routing tables for the router in the enterprise network. + We declare networks in stub routers (like router B) while filter them out at router A -> it is a waste. summarizing to the next area in the address hierarchy. With this IP addressing scheme. C. D. Use a mask with the network command to exclude interface Serial0/0/0. But from many discussions about this question. Which action will accomplish this goal? A. Theoretically. C. QUESTION 128 Refer to the exhibit. B. The IP address design lends itself to OSPF. such as router B and its associated network. Correct Answer: C Section: Mixed Questions Explanation Explanation/Reference: Explanation If we declare router B a stub router then the routers in Enterprise Network still learn about the network for S0/0/0 interface and the network behind router B. If we use the passive-interface command on s0/0/0 interface then router A & B can not become neighbor because they don`t exchange hello messages -> A can not send traffic to the network behind B . Implement a distribute list to exclude the link prefix from the routing updates. No dynamic interior routing protocol can summarize as shown. EIGRP would automatically summarize the prefixes as shown in the exhibit. Use the passive-interface command for interface Serial0/0/0. we can use a distribute list to exclude both the link prefix and the prefix from router B but it is not efficient because: + We have many stub networks so we will need a long distribute list. Declare router B a stub router using the eigrp stub command. D. . B. ROUTE Enterprises has many stub networks in their enterprise network.

Upstream neighbors should receive a consolidated route. You can configure manual summarization on any router interface. you issue the same command a second time and the following output is shown: RouterC#show ip eigrp traffic IP-EIGRP Traffic Statistics for process 1 Hellos sent/received: 2139/2104 Updates sent/received: 50/39 Queries sent/received: 5/4 Replies sent/received: 4/4 Acks sent/received: 31/37 Input queue high water mark 2. C. and router C knows an alternate path to the network. The following output is shown: RouterC#show ip eigrp traffic IF-EIGRP Traffic Statistics for process 1 Hellos sent/received: 481/444 Updates sent/received: 41/32 Queries sent/received: 5/1 Replies sent/received: 1/4 Acks sent/received: 21/25 Input queue high water mark 2. Correct Answer: A Section: Mixed Questions Explanation Explanation/Reference: Explanation In three times using the command. D. you issue the show ip eigrp traffic command on router C. you issue the show ip eigrp traffic command on router C. and downstream neighbors can receive a default route. There is a flapping link or interface. and router A does not know an alternate path to the network. the Queries sent/received & Replies sent/received are still the same -> the network is stable. The following output is shown: RouterC#show ip eigrp traffic IP-EIGRP Traffic Statistics for process 1 Hellos sent/received: 2112/2076 Updates sent/received: 47/38 Queries sent/received: 5/3 Replies sent/received: 3/4 Acks sent/received: 29/33 Input queue high water mark 2. The following output is shown: RouterC#show ip eigrp traffic IP-EIGRP Traffic Statistics for process 1 Hellos sent/received: 1057/1020 Updates sent/received: 41/32 Queries sent/received: 5/1 Replies sent/received: 1/4 Acks sent/received: 21/25 Input queue high water mark 2. you issue the same command again. you issue the same command a third time. E. The following output is shown: RouterC#show ip eigrp traffic IP-EIGRP Traffic Statistics for process 1 Hellos sent/received: 1754/1717 Updates sent/received: 41/32 Queries sent/received: 5/1 Replies sent/received: 1/4 Acks sent/received: 21/25 Input queue high water mark 2. QUESTION 130 After implementing EIGRP on your network. QUESTION 129 After implementing EIGRP on your network. 0 drops SIA-Queries sent/received: 0/0 SIA-Replies sent/received: 0/0 Moments later. The network has been stable for at least the last 45 minutes. B. 0 drops SIA-Queries sent/received: 0/0 SIA-Replies sent/received: 0/0 Approximately 25 minutes later. 0 drops SIA-Queries sent/received: 0/0 SIA-Replies sent/received: 0/0 Approximately 25 minutes later. 0 drops SIA-Queries sent/received: 0/0 SIA-Replies sent/received: 0/0 . There is not enough information to make a determination. 0 drops SIA-Queries sent/received: 0/0 SIA-Replies sent/received: 0/0 What can you conclude about this network? A. EIGRP is not working correctly on router C. Consider summarization for both upstream and downstream neighbors. There is a flapping link or interface.Correct Answer: C Section: Mixed Questions Explanation Explanation/Reference: Explanation: Summarization may be manually applied at any point in the network.

. you issue the same command a third time and the following output is shown: RouterC#show ip eigrp traffic IP-EIGRP Traffic Statistics for process 1 Hellos sent/received: 2162/2126 Updates sent/received: 53/42 Queries sent/received: 5/5 Replies sent/received: 5/4 Acks sent/received: 35/41 Input queue high water mark 2. The subnets keyword was not included in the redistribute command under router ospf 1. E. The metric specified for the redistributed EIGRP routes is too large. This is an important thing to remember when redistributing into OSPF. The network is stable. B. B. E. you discover that while router C has all of the EIGRP routes in its routing table. QUESTION 131 Refer to the exhibit. some of the EIGRP routes. There is a flapping link or interface.0/24.0/24 and 10. only classful routes will be redistributed.Moments later.2. Correct Answer: B Section: Mixed Questions Explanation Explanation/Reference: Explanation We notice that the Queries received number is increased so router C has been asked for a route. Correct Answer: B Section: Mixed Questions Explanation Explanation/Reference: Explanation If we don`t use the subnets keyword when redistributing routes learned from another routing process into OSPF. The default-information originate command needs to be added under router ospf 1.1. The administrative distance of either OSPF or EIGRP must be changed so that EIGRP has a higher administrative distance than OSPF.1. such as 10. There is not enough information to make a determination. QUESTION 132 During the redistribution process configured on RTA. EIGRP has been configured on router D. and router C knows an alternate path to the network. and router C does not know an alternate path to the network. 0 drops SIA-Queries sent/received: 0/0 SIA-Replies sent/received: 0/0 What information can you determine about this network? A. are not being redistributed into the OSPF routing domain. While verifying that the redistribution is functioning properly. What on router C may be the cause of the problem? A. making the EIGRP routes unreachable by router A. C. Router C is performing mutual redistribution between EIGRP and OSPF. The Replies sent number is also increased -> router C knows an alternate path to the network.2. There is a flapping link or interface. D. The no auto-summary command needs to be added under router eigrp 1. EIGRP is not working correctly on router C. D. router A does not have any routes from the EIGRP domain. C.

E.com/2011/07/20/summary-routes-to-null0-the-protocols. Change the metric to an EIGRP compatible metric value (bandwidth.16. D. The summary route remains in the route table. Without the subnets keyword. Under the router igrp mode add redistribute eigrp 123 Under the router eigrp mode add redistribute igrp 123 Under the router eigrp mode add redistribute igrp 123 subnets None. The subnets keyword tells OSPF to redistribute all subnet routes.0 Network 172. C. An EIGRP route will go active if there are no successors or feasible successors in the EIGRP topology table. MTUs) in the redistribute command. D. they need to manually redistributed if they have different autonomous system number.255 area 0 The subnets keyword tells OSPF to redistribute all subnet routes.that-love-them/ QUESTION 135 Which two statements about the EIGRP DUAL process are correct? (Choose two.Which two items could be a solution to this problem? (Choose two. C.0. Change the EIGRP AS number from 100 to 1 in the redistribute command. but EIGRP AS 100 is being redistributed into OSPF so the EIGRP AS needs to be changed from 100 to 1. QUESTION 134 Which three statements are true about EIGRP operation? (Choose three.17. delay. which additional command is needed to redistribute IGRP into EIGRP? Router eigrp 123 Network 10. D.0. E. When summarization is configured. only networks that are not subnetted are redistributed by OSPF.10.10. Summarization is configured on a per-interface level. EIGRP and IGRP are automatically redistributed in this instance.0. Correct Answer: D Section: Mixed Questions Explanation Explanation/Reference: Explanation: The point of this question is redistribute IGRP into EIGRP.) A.62. DUAL will trigger an EIGRP query process while placing the flapping routes in the holddown state. When redistributing IGRP into EIGRP.0 No auto-summary ! Router igrp 123 Network 172. only networks that are not subnetted are redistributed by OSPF.0. load.10. Correct Answer: CD Section: Mixed Questions Explanation Explanation/Reference: Explanation: In this example. Change the metric-type to 2 in the redistribute command. B. E. B. even if there are no more specific routes to the network.0 0. QUESTION 133 Given the accompanying output.10.0. The maximum metric for the specific routes is used as the metric for the summary route.255 area 0 RTA(config-router)#network 130.) A. D. An EIGRP route will go passive if there are no successors in the EIGRP topology table. Example: RTA(config)#router ospf 109 RTA(config-router)#redistribute rip subnets RTA(config-router)#network 130.) A. A feasible successor in the EIGRP topology table can become the successor only after all the query requests have been replied to..63. Add the subnets option to the redistribute command. The stuck in active state is caused when the wait for the query replies have timed out. in opposite. there is a feature that they are automatically redistributed if they have same autonomous system number. the router will also create a route to null 0. C. reliability. Without the subnets keyword. the router is configured for EIGRP AS 1. B.0.0 0. Automatic summarization across major network boundaries is enabled by default.0 A. C. Configure the redistribute command under router eigrp 1 instead. B. . Correct Answer: ACE Section: Mixed Questions Explanation Explanation/Reference: Reference: http://astorinonetworks.

) A.com/2011/06/14/eigrp-stub-routing/ http://www.16.0/8 10. Therefore in the routing table of R3 there will have: + Network 10. Spoke routers connected to hub routers answer the route queries for the stub router.10. EIGRP stub routing should be used on hub routers only.0. A hub router prevents routes from being advertised to the remote router.0/24 ( not summarized) + Network 172. B.) A. So the routing table of R2 will have the network 10.0. Autosummarization is enabled on routers R2 and R3. C.10. EIGRP summarizes network 172.html QUESTION 137 Refer to the exhibit. EIGRP queries are sent during the loading state in the EIGRP neighbor establishment process. C.F.16. Which two EIGRP routes will be seen in the routing table of router R3? (Choose two. F. But R1 has been configured with no auto-summary command so EIGRP will not summarize on S0 interface of R1. A stub router should have only EIGRP hub routers as neighbors. you can see the final outputs of the show ip route commands on these routers (I connected these routers via FastEthernet.0.16.0/24 because it is not directly connected with this network.10. B.0/16 10. 10.16. EIGRP is configured with the default configuration on all routers.0/24 (not be summarized). Stub routers are not queried for routes.com/en/US/docs/ios/12_0s/feature/guide/eigrpstb. E.0/24 172. F. Correct Answer: BCE Section: Mixed Questions Explanation Explanation/Reference: Reference: http://astorinonetworks.cisco.10. E.com/category/routing-protocols/eigrp/ QUESTION 136 What are three key concepts that apply when configuring the EIGRP stub routing feature in a hub and spoke network? (Choose three.0/16 172. . In this case all different networks are in different major networks so EIGRP will perform auto-summarization when it exits an interface.0/24 172.0/24 into the major 172.10.10. D. Only remote routers are configured as stubs.0/16 (summarized) -> C and D are correct.10.0.16.0. but it is disabled on router R1.10.0.10. Correct Answer: AE Section: Mixed Questions Explanation Explanation/Reference: Reference: http://routemyworld.0. When exiting S1 interface of R2.0/24 Correct Answer: CD Section: Mixed Questions Explanation Explanation/Reference: Explanation EIGRP performs an auto-summarization each time it crosses a border between two different major networks.16.0/16 network but it does not summarize network 10.10. D. not Serial interfaces so the outputs are slightly different but the main points are not changed). Note: I simulated this question on GNS3.10.

the routes originating from the OSPF stub area C.QUESTION 138 Refer to the exhibit and the partial configuration on router R2. Based on the configuration on router R2. On router R4 all RIP routes are redistributed into the OSPF domain. which EIGRP external routes will be present in the routing table of R1? A. the routes originating from the RIP routing domain B. A second redistribution is configured on router R2 using a route map. all OSPF inter and intra-area routes .

In this case R2 will use the 10. EIGRP cannot exchange routing updates with a neighbor's router interface that is configured with two IP addresses. The no auto-summary command has not been issued under the EIGRP process on both routers. . EIGRP has been configured on routers R1 and R2. Answer D is a bit unclear.1. to send EIGRP update to R1. What could be the cause of the problem? A. Correct Answer: D Section: Mixed Questions Explanation Explanation/Reference: Explanation EIGRP updates always use the primary IP address of the outgoing interface as the source address.1/24.2.2. B.2/24 address.D. EIGRP cannot form neighbor relationship and exchange routing updates with a secondary address.com/en/US/tech/tk365/technologies_configuration_example09186a008009 3f09. all routes originating from RIP and OSPF routing domains Correct Answer: A Section: Mixed Questions Explanation Explanation/Reference: Explanation R2 sees the routes from RIP domain as external routes while it sees the routes from OSPF Stub Area as internal routers. QUESTION 139 Refer to the exhibit.shtml. It should state that EIGRP cannot form neighbor relationship and exchange routing updates if the two primary addresses on two routers are not in the same subnet. However. please read http://www. From the output we learn that the routetype external is redistributed from OSPF to EIGRP (via route-map ABC) so we will see the routes from the RIP domain (external) in the routing table of R1. Interface E0 on router R1 has not been configured with a secondary IP address of 10. Therefore R1 does not accept this update and generates the not on common subnet error message. For more information about this problem. C. which is not in the same subnet of R1. QUESTION 140 Refer to the exhibit.cisco. Notice that although R1 does not accept R2 as its EIGRP neighbors but R2 accepts R1 as its EIGRP neighbor accepts R1 hello packets.1. R1 does not show R2 as a neighbor and does not accept routing updates from R2. D. In the case we want to redistribute routes from OSPF Stub Area (Area 1) to EIGRP we need to use the match route-type internal command instead..

hello packets are broadcast every 5 seconds for neighbor discovery. R4 becomes the successor for Network A and will be included in the routing table. But R5 doesn`t have any neighbor to ask besides R2 so it will send an unreachable message to indicate it has no alternative path for that route and has no other neighbor to query. the Stuck in active (SIA) timer on R2 expires and R2 marks the route 10. .1. D.0/24 sent by router R2 . Unlike R5.1. Reply packets are multicast to IP address 224. Update packets route reliable change information only to the affected routers. B. Seiral0.EIGRP had converged in AS 1 when the link between router R1 and R2 went down.1. So R2 goes active on the that route to find a new successor by sending queries out to its neighbors (R3 and R5) requesting a path to the lost route. E. The console on router R2 generated the following messages: *Mar 20 12:12:06: %DUAL-5-NBRCHANGE. The output line via 10.3 and is waiting for a reply (the lowercase r).3. EIGRP has been configured on all routers in the network.4. On low-speed links. R3 has a neighbor (R4) so it continues to query this router. D.3 (Infinity/Infinity).com/wiki/Enhanced_Interior_Gateway_Routing_Protocol#EIGRP_Packe t_Types QUESTION 142 Refer to the exhibit. R2 checks its topology table for a feasible successor but it can`t find one. too. (Reference: http://www.1. R2 becomes the successor and will be placed in the routing table. C. IP-EIGRP 1: Neighbor 10. Cleaning up The network administrator issued the show ip eigrp topology active command on R2 to check the status of the EIGRP network. serno 1232 indicates R2 has sent a query to 10. R3 can`t reply back to R2. Correct Answer: D Section: Network Principles Explanation Explanation/Reference: Reference: http://docwiki. Incorrect bandwidth configuration on router R5 prevents R2 from establishing neighbor adjacency.1.0/24 stuck-in-active state in IP-EIGRP 1.0/24. Therefore. R4 becomes the successor for Network A and will be placed in the routing table.1. Route 10. R3 also checks its EIRGP topology table for a feasible successor but it has none. hello packets are broadcast every 15 seconds for neighbor discovery.1. Now suppose there is a problem on the link between R3 and R4 so R4 never receives the query from R3 and of course. On high-speed links.3 (Serial0) is down: stuck in active *Mar 20 12:15:23: %DUAL-3-SIA. Which router will R1 select as the successor and feasible successor for Network A? A. Both R3 and R5 also go active for the that route. R3 also never receives a reply back from R4. R2 becomes the feasible successor for Network A.0. R2 loses its successor for the network 10.0/24 as stuck in active route. Which statement best describes the reason for the error messages? A. D. Router R3 did not reply to the query about network 10.1. No feasible successor will be selected as the reported distance from R4 is lower than the feasible distance. C. B. The command metric weights 0 0 1 0 0 has been added to the EIGRP process so that only the delay metric is used in the path calculations. Router R5 did not reply to the query about network 10. R4 becomes the feasible successor for Network A.10 using RTP. R2 becomes the successor and will be placed in the routing table.0. B.1.com/en/US/tech/tk365/technologies_tech_note09186a008010f016. No feasible successor will be selected as the advertised distance from R2 is higher than the feasible distance. r.1.1.1.shtml) QUESTION 141 Which EIGRP packet statement is true? A. Correct Answer: C Section: Mixed Questions Explanation Explanation/Reference: Explanation When the link between R1 and R2 is down. Incorrect bandwidth configuration on router R3 prevents R2 from establishing neighbor adjacency.cisco.cisco. After about 3 minutes.0/24 sent by router R2 . Reply packets are used to send routing updates.1. C.3.

) . Issue the command bandwidth 224 on each subinterface. FD=5+10+5=20 R4 is successor No FS. B. incorrect distribute lists have been configured missing ip classless command CEF not enabled no default metric configured for EIGRP Correct Answer: AD Section: Infrastructure Services Explanation Explanation/Reference: Explanation An incorrect distribute list can filter out updates therefore none of the OSPF routes are showing in EIGRP. Issue the command bandwidth 56 on each subinterface. which three statements are true? (Choose three. QUESTION 145 Based on the exhibited output. all neighbors share the same bandwidth. The default metric when redistributing into EIGRP is infinite so we must specify a seed metric for EIGRP to work with.Correct Answer: B Section: Mixed Questions Explanation Explanation/Reference: Explanation: The point of the question is DUAL of EIGRP. C. Issue the command bandwidth 224 on the physical interface. Issue the command bandwidth 56 on the physical interface. In this case the CIR of each PVC is the same so we can find the bandwidth of the main interface (multipoint connection interface) by 56 x 4 = 224. D. What must be done on router A in order to make EIGRP work effectively in a Frame Relay multipoint environment? A. B. an administrator notices that none of the OSPF routes are showing in EIGRP. QUESTION 144 You are a network technician. D. C. Correct Answer: D Section: Network Principles Explanation Explanation/Reference: Explanation In Frame Relay.) A. What are two possible causes? (Choose two. regardless of the actual CIR of each individual PVC. study the exhibit carefully. because no other router's AD is lower the FD QUESTION 143 During a redistribution of routes from OSPF into EIGRP. Notice that if the bandwidth on each PVC is not equal then we get the lowest bandwidth to multiply.

EIGRP is configured on all routers in the network. QUESTION 147 Which three statements are true about EIGRP route summarization? (Choose three. a reply packet was sent to this destination.1.0/16 is a summary.0/24.2.2.0. or the feasible successor. If the routes are active. and the successor. A default route has been redistributed into the EIGRP autonomous system.. EIGRP computations are "actively" being performed for this destination.1 to the hello message sent out inquiring for a second successor to network 10. Both are symptoms of the SIA problem.0 command.2 is configured with the ip default-network 0.Active. Router R1 is waiting for a reply from the neighbor 10. Router R1 is waiting for a reply from the neighbor 10. state.1.6.0. C. the router immediately creates a route that points to null0 interface. or next hop to that network.0/16 was redistributed into EIGRP.1.0.1. Under most normal conditions. This is the ideal state. R1 is configured with the variance command. D. the summary route will use the metric of the largest specific metric of the summary routes. no EIGRP computation is being performed.1. The fields to note in this output are as follows: P-. Manual route summarization is configured in router configuration mode when the router is configured for EIGRP routing. Route information-.Update. the routes should all be in a passive state and no EIGRP process are running for that route. Router R1 can send traffic destined for network 10. When manual summarization is configured.Reply. E. an update packet was sent to this destination. can be reached via 2 unequal paths (with FD of 23072000 & 20640000) so surely R1 has been configured with the variance command By configuring a default route and redistribute it into EIGRP you will get the line D *EX 0.2. When manual summarization is configured.0. line in the routing table of that router From the line 10.6.IP address of the route or network. B. The route to 10. this could indicate the dreaded stuck in active. its subnet mask.2. D. Q-.0. Correct Answer: ACD Section: Network Principles Explanation Explanation/Reference: Explanation From the routing table above.1 to the hello message sent out before it declares the neighbor unreachable. What conclusion can be derived from the show ip eigrp topology output provided? A. C.A.0.0/24.16.Passive. a query packet was sent to this destination. Manual route summarization is configured on the interface. Router R1 is waiting for a reply from the neighbor 10.1 in response to the query sent out about network 10. Routes constantly appearing in an active state indicate a neighbor or query problem.2. R1 is configured with the ip summary-address command. or SIA.1. The ip summary-address eigrp command generates a default route with an administrative distance of 90.Query. Correct Answer: D Section: Network Principles Explanation Explanation/Reference: Explanation: The show ip eigrp topology command lists all routes that EIGRP is aware of and shows whether EIGRP is actively processing information on that route.0 is not the major network of net QUESTION 146 Examine the exhibit carefully.. R-. . E. R1 is sourcing an external EIGRP route from Null0.6. Null0 we know that this network has been summarized with the ip summaray-address command (notice that 10. B. U-.1.1. B. C. 00:16:18. The ip summary-address eigrp command generates a default route with an administrative distance of 5. A-. D.0/0 . we see that network 172. F. F.0/24 out of interface FastEthernet0/0.) A.2.0.1. The router at 10.

in which additional summarization can be performed.Correct Answer: BEF Section: Network Principles Explanation Explanation/Reference: Explanation: The purpose of route summarization is small routing tables. If there are any more specific routes in the routing table. smaller updates.com/en/US/docs/ios/12_0/np1/configuration/guide/1ceigrp. Manual route summarization can be configured on per interface basis. there usually is no need to configure network level summaries using the ip summary-address eigrp command. subnetworks are summarized to a single classful network and automatic route summarization is enabled by default. On major network boundaries. Route summarization works in conjunction with the ip summary-address eigrp interface configuration command.cisco. You can configure a summary aggregate address for a specified interface. When summarization is configured on an interface. the router immediately creates a route pointing to null0.html . If automatic summarization is in effect. EIGRP will advertise the summary address out the interface with a metric equal to the minimum of all more specific routes Reference: http://www.