CCNA Discovery Working at a Small-to-Medium Business or ISP

1.3.1.3: Identifying Equipment to Meet Customer Requirements
Topology Diagram

Objectives
• • • Select the appropriate interface cards for the needs and budget of an organization. Compare the trade-off between cost and flexibility. Add new equipment to accommodate expansion and allow for future growth.

Background / Preparation
An owner of a small Tier 3 ISP provides Internet access to small businesses in the area. Ten customers are starting e-commerce activities and have enquired about co-locating their web servers in the NOC facilities to provide faster access to the Internet backbone via the upstream provider. Because of the growing trend toward e-commerce, the ISP owner has decided to add co-location services to the services that they offer. To connect customer web servers to the Internet, the ISP must purchase new routers. The ISP is deciding between using several less-expensive Cisco 1841 routers or one or two of the larger Cisco 2811 routers. You have been asked to evaluate which router model best meets the needs of the proposed co-location services and how many routers and interface cards are needed. The following requirements must be met: • • • • • The maximum budget for routers and interface cards is $10,000 for the first year. The starting configuration must support 10 customer servers. At least 20% spare capacity must be available at all times. If the spare capacity falls below 20%, new equipment should be purchased. A 20% growth rate in the demand for co-location services is expected each quarter (every three months). Two serial ports must be available to connect to the upstream ISP. To ensure that backup routes are available, each router needs to have its own connection to the upstream provider.

Your task is to recommend the solution that best meets the requirements for the first year while staying within the maximum budget of $10,000. For the purposes of this exercise, use the following equipment costs. • • • • • 1841 router – $1,500 2811 router – $2,500 HWIC-4ESW four-port Ethernet switch card – $500 WIC-2T two-port serial interface card – $700 NM-ESW-161 16-port Ethernet switching network module – $1500

All contents are Copyright © 1992–2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.

Page 5 of 115

Click the 2811 router in the workspace area.CCNA Discovery Working at a Small-to-Medium Business or ISP Note: This activity begins by showing 100% completion. Using the configuration from Step g. Which module provides the most Ethernet ports? How many ports does it have? ________________________________________________________________ e. This document is Cisco Public Information. how soon will another 1841 router need to be purchased? ________________________________________________________________ n. All rights reserved. ________________________________________________________________ i. How many spare ports does this equipment provide? Does this number meet the requirement for 20% growth? ________________________________________________________________ l. b.4 servers. All contents are Copyright © 1992–2008 Cisco Systems. what would be the total cost to purchase this router? ________________________________________________________________ j. Page 6 of 115 . a. plan to support 3 new servers. d. assuming a 20% growth every quarter. On the Physical tab. Click the 1841 router in the workspace area. Inc.000 is spent? ________________________________________________________________ o. Step 1: Evaluate the scalability of the Cisco 1841 router. in the Physical Device View window. c. Click the power switch to turn on the router. This activity is not graded. (Hint: Round up to the nearest whole number. Based on your expense sheet calculations. Fill out the expense sheet in Handout A with the necessary equipment and costs for each quarter of operation. Drag the module with the most Ethernet ports to an empty slot on the router in the Physical Device View window. Drag the module with the most serial ports to an empty slot on the router. Click each module in the Modules column and read its description in the box below the router. because the purpose is to only demonstrate the process used to design and plan a network upgrade. How much equipment can be purchased before the initial budget of $10.) m. f. Which module provides the most serial ports? How many ports does it have? ________________________________________________________________ g. How many customer servers can be supported within the initial equipment budget? ________________________________________________________________ Step 2: Evaluate the scalability of the Cisco 2811 router. ________________________________________________________________ h. How many 1841 routers are needed to support the initial 10 customer servers? What is the total cost? ________________________________________________________________ k. if a 20% growth is 2. a. click the power switch to turn off the router. For example. The remaining questions in the handout for Step 1 will help you evaluate the scalability of the 1841 router.

Which interface card provides the most Ethernet ports? How many ports does it have? (Write your answers on the handout.4 servers. The 2811 router comes with two Fast Ethernet ports. click the power switch to turn off the router. Inc. The modules with names that begin with HWIC or WIC are interface cards. if a 20% growth is 2. in addition to the ports provided by the modules. what is the maximum number of servers that one 2811 router can support with the added modules? ________________________________________________________________ l.CCNA Discovery Working at a Small-to-Medium Business or ISP b. Based on your expense sheet calculations. Page 7 of 115 . Drag the interface card with the most Ethernet ports to three of the four remaining slots on the router. Assuming one Ethernet port is used per customer server. how soon will another 2811 router need to be purchased? ________________________________________________________________ ________________________________________________________________ All contents are Copyright © 1992–2008 Cisco Systems. k. d. Which network module provides the most Ethernet ports? How many ports does it have? ________________________________________________________________ e. in the Physical Device View window. plan to support 3 new servers. What is the total cost of this configuration ________________________________________________________________ n. How many empty interface card slots (smaller slots) are available? (Write your answer on the handout. assuming a 20% growth every quarter. Fill out the expense sheet in Handout B with the necessary equipment and costs for each quarter of operation. Drag the network module with the most Ethernet ports to the empty network module slot on the router in the Physical Device View window. On the Physical tab. Click each module in the Modules column and read its description in the box below the router. The network module slot is the larger slot on the left side of the router.) q. Which interface card provides the most serial ports? How many ports does it have? (Write your answers on the handout. The modules with names that begin with NM are network modules. For example.) ________________________________________________________________ h. c. This document is Cisco Public Information.) ________________________________________________________________ g. How many spare ports does this initial equipment provide? Does this number meet the requirement for 20% growth? ________________________________________________________________ p.) ________________________________________________________________ j. i. Drag the interface card with the most serial ports to the empty slot on the router. A 20% growth needs to be provided? How many ports are set aside to accommodate this growth? ________________________________________________________________ m. (Hint: Round up to the nearest whole number. f. All rights reserved. How many 2811 routers are needed to support the initial 10 customer servers? What is the total cost? ________________________________________________________________ o.

This document is Cisco Public Information. These topologies will help determine the best solution for meeting both the current and future needs while still remaining within budge Lab Topology Using 1841 Routers Topology A (Q1 startup) – Proposed initial co-location solution using Cisco 1841 routers All contents are Copyright © 1992–2008 Cisco Systems.000 is spent ________________________________________________________________ s.CCNA Discovery Working at a Small-to-Medium Business or ISP r. Inc. How much equipment can be purchased before the initial budget of $10. All rights reserved. Page 8 of 115 . How many customer servers can be supported within the initial equipment budget? ________________________________________________________________ The following diagrams represent the initial and final network topologies for both the 1841 and 2811 routers.

CCNA Discovery Working at a Small-to-Medium Business or ISP Topology A (end of Q4) – Expanded co-location design using Cisco 1841 routers Lab Topology Using 2811 Routers Topology B (Q1 startup) – Proposed initial co-location solution using a Cisco 2811 router All contents are Copyright © 1992–2008 Cisco Systems. Inc. This document is Cisco Public Information. Page 9 of 115 . All rights reserved.

Inc. This causes a loss of service to all the existing customers on that rack. Whenever new equipment is added to a co-location rack. which solution would you recommend to provide the best scalability while staying within the budget limitations? Explain the reasons for your choice? ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ b. customers will switch to another provider. If this happens too often. All rights reserved. Page 10 of 115 . This document is Cisco Public Information. Based on your experiences with the 1841 and 2811 router All contents are Copyright © 1992–2008 Cisco Systems. the rack must be powered down. Based on your evaluations of the 1841 and 2811 router. What other solutions could be considered? ____________________________________________________________________________ ____________________________________________________________________________ Step 4: Reflection a.CCNA Discovery Working at a Small-to-Medium Business or ISP Topology B (end of Q4) – Expanded co-location solution using a Cisco 2811 router Step 3: Recommend a co-location solution a.

Network availability and reliability is of great importance to e-commerce businesses. Inc. which solution would minimize network downtime? Explain the reasons for your choice? ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ b. All rights reserved. What could be done to improve the reliability of the co-location network and to minimize downtime? ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ All contents are Copyright © 1992–2008 Cisco Systems.CCNA Discovery Working at a Small-to-Medium Business or ISP configurations. This document is Cisco Public Information. Page 11 of 115 . What would happen to the Internet access of the customer web servers if one of the routers in the co-location network failed? Which solution would negatively affect the most customers if a co-location router failed? ____________________________________________________________________________ ____________________________________________________________________________ ____________________________________________________________________________ c.

This document is Cisco Public Information. Q3 or Q4) Initial Description Unit Cost Total Cost (Quantity x Unit Cost) 1841 Router chassis (includes 2 Ethernet ports) $1500 TOTAL EQUIPMENT COST FOR YEAR 1 All contents are Copyright © 1992–2008 Cisco Systems. Q2. Page 12 of 115 .CCNA Discovery Working at a Small-to-Medium Business or ISP Handout A: Projected Year 1 Equipment Costs for Co-Location Solution A (Cisco 1841) Timing Number of Server Ports Required (including 20% spare) 10 Quantity Equipment Needed (Q1. Inc. All rights reserved.

Inc. Q3 or Q4) Initial Description Unit Cost Total Cost (Quantity x Unit Cost) 2811 Router chassis (includes 2 Ethernet ports) $2500 TOTAL EQUIPMENT COST FOR YEAR 1 All contents are Copyright © 1992–2008 Cisco Systems.CCNA Discovery Working at a Small-to-Medium Business or ISP Handout B: Projected Year 1 Equipment Costs for Co-Location Solution B (Cisco 2811) Timing Number of Server Ports Required (including 20% spare) 10 Quantity Equipment Needed (Q1. Q2. All rights reserved. Page 13 of 115 . This document is Cisco Public Information.