Legacy ATM Migration to IP/Ethernet
Leveraging the 7705 SAR for Wireline Transformation

. This application note discusses the application of the 7705 SAR to enable operators to cost-effectively leverage and consolidate their existing ATM DSLAM installations on a next-generation IP/Ethernet broadband services platform. Ethernet and IP/MPLS technologies. The Alcatel-Lucent 7705 Service Aggregation Router (SAR) is a next-generation aggregation platform that is purpose-built for network transformation tasks spanning TDM.Abstract As Internet usage is growing significantly due to an insatiable appetite for multimedia applications and content. many operators are facing an increasing amount of legacy obsolescence issues with their installed base of high-speed Internet infrastructure. What was a strategic asset just a few years ago has suddenly turned into a financial liability that is limiting service growth and innovation. 3G and 4G mobile networking technologies just as easily as it can bridge those that exist between TR-059 and TR-101 broadband aggregation networks for wireline. A majority of these service providers may already have considerable investments in next-generation broadband infrastructure based on IP. Ethernet and MPLS technologies. ATM. but lack the critical link that provides backwards compatibility with their legacy ATM-based infrastructure. many existing subscribers. services and revenues are effectively marooned on an island of legacy infrastructure that is facing rapidly dwindling resources. As a result. The Alcatel-Lucent 7705 SAR bridges technology generation gaps between evolving 2G.

Alcatel-Lucent 7705 Service Aggregation Router 4. Glossary of terms . References and sources 9.2 Legacy ATM interworking with Ethernet aggregation 5. Executive summary 2.2 Multivendor data network migration 7. Conclusion 8.1 Legacy ATM transport over MPLS pseudowires 4. Alcatel-Lucent data integration and migration services 6. Legacy aggregation and interworking scenarios 4. New technology introduction and legacy migration 3.1 Multivendor Integration 6.Table of contents 1 2 3 4 5 6 9 11 11 13 14 14 14 1. Legacy subscriber consolidation and service innovation 6.

1..0 delivery requirements. future-safe broadband services platform that is able to take on Web 2. OpEx). Although legacy infrastructure represents a sunk cost and is fully operationalized. A gradual migration of the IP transport layer from legacy ATM to Ethernet and from PPPoX to IPoE eases the migration of existing subscribers and services to the next-generation all-IP platform. Legacy broadband network transformation Next-gen TR-101 network HQoS Policy Manager CPE Multiple devices per subscriber AN EAN BNG RADIUS/DHCP server Converged OSS Apps Strategic network value – Investment phase Transport Legacy PPoE HSI network IT/OSS Service migration PPPoE CPE DSLAM ATM aggregation Legacy BRAS RADIUS server Billing system Diminishing network value – Cash cow Legacy ATM Migration to IP/Ethernet | Application Note 1 . while the network lacks the capacity and capability for service innovation and new revenue creation. there are increasing and ongoing maintenance expenses (i. The main rationale for an HSI legacy migration is to shift investments from legacy maintenance to the strategic build-out of next-generation infrastructure and services. video on demand (VoD) and rich multimedia services require a network transformation from today’s IP service delivery networks that are built for best-effort Internet (HSI) services to a converged. the goal is to make such migration financially feasible and operationally non-disruptive. Although legacy network migration is needed. while paving the way towards a future mode of operation. This application note reviews a subset of migration scenarios that are based on best practices that have been developed with leading service providers to address these migration requirements in a cost-optimized manner (see Figure 1).e. A lot of time and resources have gone into the establishment of existing IT/OSS infrastructure and this effort should be leveraged by providing backwards compatibility with the present mode of operation. Executive summary The introductions of IPTV. Figure 1.

as well as absorbing the ramp-up costs of building a next-generation service delivery infrastructure. while at the same time avoiding the need to make substantial upgrades and extensions of the installed base to cater for continuing growth in HSI — in other words “how to implement an effective cap-and-grow strategy that leverages installed base assets. bandwidth-hungry applications like peer-to-peer and streaming video.) Figure 2. For many Telco service providers. and to address multimedia service innovation requirements.2. this transformation point only occurs now. Both new subscribers and existing voice and HSI subscribers that upgrade to a multiservice bundle are migrated over to the new all-IP broadband network in a gradual process. All-IP broadband network transformation process Legacy PSTN CAPEX/OPEX requirements Dialup IA POTS VoIP/FMC Hybrid phone Connected home Internet video On-line gaming Legacy HSIA Best effort services MOS IPTV Triple Play bundles Introduction HSI migration HDTV/PIP PSTN migration VoD/nPVR Multiscreen multimedia All-IP NGN Converged services network Time IPTV/video inflection point Internet video inflection point IP multimedia inflection point 2 Legacy ATM Migration to IP/Ethernet | Application Note . For others. The transformation process has the following phases: • Introduction phase: The initial roll-out of a next-gen residential IP broadband infrastructure. an inflection point is approaching at which it becomes more economical to transform the network to a new architecture that is better optimized to handle these requirements than to keep progressing with incremental legacy upgrades. even if they have decided not to upgrade their existing service. and it is therefore important to manage capital and operational expenditures during the transformation process carefully. while saving cost for legacy services and infrastructure. while reaching the end-goal of converged service delivery?” This migration will take several years to complete. The rationale is to reduce the cost of maintaining separate legacy infrastructures in parallel. • Upgrade phase: This is a cap-and-grow phase in which the next-gen infrastructure provides full service coverage in a given area. on-line gaming and other rich multimedia content. to build service coverage in a given geographical area.) • Migration phase: Legacy infrastructure is being phased out and remaining customers are transparently migrated to the next-gen infrastructure. From a cost and investment perspective. in conjunction with legacy voice and HSI networks. New technology introduction and legacy migration As the legacy HSI infrastructure and service models are being challenged by the rise of Internet video. the goal is to balance the cost of rolling out new infrastructure. as their legacy HSI infrastructure is becoming increasingly congested by emerging. (This is indicated by the horizontal arrows in Figure 2. this network transformation was triggered by the need to offer IPTV as a means to close an important gap with competing MSOs in terms of services portfolio. (This is indicated by the vertical arrows dropping down in Figure 2.

The following section will introduce the Alcatel-Lucent 7705 SAR as a platform of choice to migrate ATM legacy aggregation. traffic management. ensuring that the key service attributes are Legacy ATM Migration to IP/Ethernet | Application Note 3 . While subscribers that only require HSI and/or voice could still be served through the legacy ATM DSL access infrastructure. It is also extremely effective at transporting of legacy traffic such as T1/E1 private line transport over a modernized infrastructure. Figure 3. The Alcatel-Lucent 7705 SAR backhaul solution employs pseudowire encapsulation methods to map services end-to-end. the 7705 SAR enables the creation of an end-to-end solution for the growing fixed and mobile aggregation market. cost-effective Ethernet. Note that these phases may overlap in time.The end result is converged broadband service delivery over a common IP broadband infrastructure. Figure 4.5G CSMs adapter slots 4x 10G adapter slots Alarm module 7705 SAR-F 2 Gb/s HD Small sites hardened 7705 SAR-8 12 Gb/s HD Small to medium aggregation sites 7705 SAR-18 140 Gb/s HD Large aggregation hubs or smaller central sites The 7705 SAR’s quality of service. provisioning. 3. Interface adapter cards for 7705 SAR-8 and SAR-18 Ethernet 8-port Ethernet: • 6 ports of 10/100 Base-Tx • 2 ports of 10/100/1000 with small form factor pluggable (SFP) optics SONET/SDH • 4-port OC-3/STM-1 clear channel • 2-port OC-3/STM-1 channelized ASAP • 16-port ASAP T1/E1 • 32-port ASAP T1/E1 • 4-port DS3/E3 Built on the same architectural software base as the highly successful Alcatel-Lucent service router products. Alcatel-Lucent 7705 Service Aggregation Router The Alcatel-Lucent 7705 Service Aggregation Router (SAR) is an edge aggregation platform providing superior IP/MPLS and pseudowire capabilities (Figure 3). Its flexible interface options (Figure 4) and future-proof architecture will enable it to address evolving aggregation requirements. especially on a network-wide basis. Alcatel-Lucent 7705 SAR family Redundant 12x 2. a legacy replacement of the ATM aggregation layer may be more cost-effective and futuresafe than to continue down the route of incremental upgrades. superior services. troubleshooting and billing features make it possible to provide consistent. The 7705 SAR excels at concentrating traffic from wireline and radio access sites and adapting it to a normalized IP/MPLS infrastructure that leverages available media. especially scalable.

Legacy aggregation and interworking scenarios Today. while using a cost-effective packet environment to aggregate services. compact IP/MPLS-based platform with legacy interface support The 7705 SAR provides high-density capacity from 2 to 140 Gb/s switching capacity in a compact chassis The 7705 SAR allows full leverage of existing assets while investing for a future-oriented architecture 4. operators are forced to deal with their ATM aggregation node congestion by building out capacity in the ATM and SONET network until there is a cost-effective way to move the traffic to the metro Ethernet network (see Figure 5). But as traffic volumes are growing due to bandwidth-hungry Internet applications. Table 1. Services such as ATM. but broadband access and services have now converged on IP over Ethernet transport Uplink capacity becomes a bottle neck. Ethernet and TDM traffic can be natively switched across the 7705 SAR and transported over Ethernet/MPLS and SDH/SONET transport architectures. but upgrading the ATM infrastructure is not a strategic investment for the operator Operator wants to leverage sunk investment in ATM DSLAMs but has future-oriented infrastructure in networking 7705 SAR addresses the balance between leveraging existing investment in ATM DSLAMs while allowing for a transition to Ethernet uplinks Allows the operator to make the best use of the scalable Ethernet aggregation infrastructure 7705 SAR can interconnect legacy ATM DSLAMs and IP DSLAMs over next generation Ethernet and MPLS transport The 7705 SAR has a unique transformational capability as it is a modern. Table 1 lists the key deployment benefits of the 7705 SAR. ATM DSLAMs are deployed in the wiring offices (WO) and central offices (CO) of carrier networks. The traffic is aggregated by an ATM switch and then transported over a SONET network to a central location where the BRAS terminates the sessions. Figure 5.maintained. ATM IMA. Key deployment benefits CuSTomeR ISSue oR PRobLem SoLuTIon DIFFeRenTIATIon ATM switches were traditionally used for DSLAM aggregation. IP routing and forwarding are supported. Coexistence of legacy and next-generation infrastructure WO N x T1 CO OC-3 ATM DSLAM DS3 OC-3 ATM switch ADM ADM SONET/ATM network ADM OC-3 ATM DSLAM ATM DSLAM ADM ADM IP BRAS ATM DSLAM Ethernet Ethernet IP DSLAM 7450 ESS 7750 SR IP/MPLS Metro 7450 ESS 7750 SR IP BRAS 4 Legacy ATM Migration to IP/Ethernet | Application Note . In addition to pseudowire transport.

While the legacy ATM network and the next-generation infrastructure can coexist and operate as “ships in the night”. They will attempt to leverage the installed ATM DSLAM base for existing customers. thus avoiding the need for separate BRAS systems.g. • A single-edge approach.1 Legacy ATM transport over MPLS pseudowires Service providers will look for a cost-effective migration strategy for legacy infrastructure that minimizes service disruption for the existing subscriber base. As the legacy infrastructure is gradually bleeding subscribers and revenues. there is a significant duplication of resources and efforts. The advantage is a transparent operational migration of the legacy ATM aggregation layer in which the existing ATM BRAS is fully leveraged. effectively turning them into IP DSLAMs that can directly interface with a next-generation aggregation network. DS3 and OC-3 uplinks that are carried within ATM VPs — and encapsulate this traffic in MPLS tunnels for transport over the IP/MPLS or SDH/SONET metro network. which may not be the best use of capital.. The validity of the DSLAM upgrade scenarios will depend on the make. Alcatel 7300/7301 ASAM) with Ethernet network terminations. there are two options: • A dual-edge approach. Legacy ATM Migration to IP/Ethernet | Application Note 5 . One option is to upgrade existing ATM DSLAMs (e. The 7750 SR acts as the L2 service edge. The question then is “How do you conduct this retirement process in an orderly manner?” 4. The solution (see Figure 6) replaces the existing ATM aggregation network. a natural subscriber migration occurs as more demanding subscribers will upgrade their broadband service to typically higher speeds and a broader service offering that can be supported on the next-generation infrastructure. Subscriber traffic from IP DSLAMs in the same CO can be aggregated on the same 7705 SAR that provides investment protection in the aggregation layer. this effectively entails an investment in legacy infrastructure. The alternative is to use legacy interfacing options in the next-generation aggregation network. In this scenario. To manage subscriber services delivered from the legacy ATM DSLAMs. in which legacy ATM BRAS and next-gen IP BRAS coexist. while minimizing expenditures on further capacity upgrades to cater to increasing HSI traffic volumes. the 7750 SR can act as a converged Broadband Network Gateway for all subscribers. it will ultimately reach the point where legacy retirement becomes financially attractive to the network provider. The ATM BRAS is managing subscribers on the legacy ATM DSLAMs. handing subscriber traffic to respective legacy ATM BRAS and IP BRAS systems. and the IP BRAS is handling IP DSLAM subs. in which interworking functions adapt subscriber traffic from ATM DSLAMs for termination on an IP BRAS in order to phase out legacy ATM BRAS. which can then be phased out. as subscribers and services gradually migrate from legacy ATM DLSAMs to IP DSLAMs. The advantage is a more consolidated network and a more homogeneous subscriber experience. the Alcatel-Lucent 7705 SAR is introduced to directly aggregate traffic from legacy ATM DSLAMs — typically from N x T1. However. In this scenario. Over time. model and age of the installed base.

which may be costly over time. 6 Legacy ATM Migration to IP/Ethernet | Application Note . This solution is available for the 7705 SAR in R 4. first. Conducting the migration in two steps may spread the amount of complexity and effort involved. The drawback of this scenario is that this logical separation implies the need to maintain a redundant operational infrastructure for legacy and next-generation services. Aggregating legacy ATm PVCs into ATm VPs over mPLS pseudowires ATM PVC ATM VP pseudowire MPLS WO N x T1 CO PPP Eth VCI VPI PPP Eth VCI VPI Srvc Lbl MPLS Lbl PPP Eth VCI VPI Srvc Lbl MPLS Lbl ATM broadband services 7450 ESS OC-3 7705 SAR-18 GigE IP/MPLS Metro 7450 ESS IP broadband services 7750 SR (BNG) IP BRAS ATM BRAS ATM DSLAM DS3 OC-3 ATM DSLAM ATM DSLAM GigE ATM DSLAM IP DSLAM Note that these scenarios are not necessarily competing alternatives. They can be executed sequentially as a migration strategy that. The 7705 SAR can aggregate traffic both on a next-generation MPLS/Ethernet metropolitan area network or existing SDH/SONET metro transport networks. consolidates legacy ATM DSLAMs in a common aggregation network and. secondly. Subscribers and services delivered from legacy ATM DSLAMs share the same aggregation network but peacefully coexist and operate as “ships-in-the-night”. The following aggregation scenario remedies this issue by introducing interworking functions in the aggregation layer. The interworking scenario (Figure 7) aggregates ATM Virtual Private Connections into Service Access Points (SAPs) on a Virtual Private LAN Service. 4. consolidates legacy subscribers and services on a converged IP service edge.0 and is identical to the way IP traffic is aggregated in the Alcatel-Lucent Triple Play Service Delivery Architecture model using Virtual Private LAN Services (VPLS) to aggregate subscriber traffic.Figure 6. which allows for the adaptation of subscriber traffic from legacy ATM access traffic into a next.2 Legacy ATM interworking with Ethernet aggregation The advantage of transporting ATM traffic over MPLS pseudowires lies in its operational simplicity and interworking transparency.generation IP/Ethernet environment. and subsequently on a common IP service edge.

The advantage of the interworking scenario based on subscriber SAPs is that it fits into the 7450 ESS/7750 SR management paradigm in a similar way as subscribers on an IP DSLAM would. For reliability reasons. VPI/VCI addresses are associated to MAC addresses in the Ethernet domain and QoS is applied. It also provides an easy way to map subscriber traffic from SAPs on other types of Layer 2 and Layer 3 identifiers at egress of the MPLS cloud. and subscribers are represented as residential Service Access Points (SAP) towards the 7450 ESS/ 7750 SR. Residential Split Horizon Split horizon ATM ATM ATM ATM ATM Redundant uplinks GigE GigE Legacy ATM Migration to IP/Ethernet | Application Note 7 . Split Horizon forwarding prevents traffic exchange between attached circuits for security reasons (Figure 8). which can terminate ATM Permanent Virtual Connections (PVCs). The SAPs will take PPPoEoA or IPoEoA traffic coming from the CPE/DSLAM and remove the ATM encapsulation to expose the Ethernet header.Figure 7. Figure 8. Each ATM PVC is attached as a circuit into the VPLS instance. the VPLS instance utilizes redundant uplinks. in order to adapt to different BRAS interworking requirements or different wholesale/retail demarcation options. Aggregation legacy ATm PVCs in ethernet Virtual Private LAn Services ATM PVC ATM residential SAP and VPLS Spoke SDP to ePipe service MPLS WO N x T1 CO ATM DSLAM DS3 OC-3 ATM DSLAM ATM DSLAM 7450 ESS OC-3 7705 SAR-18 GigE 7750 SR IP/MPLS Metro 7450 ESS ATM and IP broadband services 7750 SR 7750 SR (BNG) GigE ATM DSLAM IP DSLAM A logical bridging domain (VPLS) is created.

MPLS fast reroute is used to protect uplink resiliency on the 7705 SAR. C-VLAN tags are defined per VP/VC on a SAP basis and pushed on access ingress at the 7705 SAR. PPP PADI/PADO messages are captured at access ingress of the 7705 SAR upon which an Agent-Circuit-ID TLV can be inserted for interception and source trace at the BRAS. • Option B initiates the MPLS tunnels at the edge of the Ethernet aggregation network. In this case. However. Gigabit Ethernet Link Aggregation Groups (LAG) are being used to enable resilient uplink connectivity between the 7705 SAR and the 7x50. or act as a Broadband Service Router feeding into separate BRAS systems. There are two options (A and B) for extending the MPLS uplinks: • Option A extends MPLS all the way to the 7705 SAR. 8 Legacy ATM Migration to IP/Ethernet | Application Note . This capability is used for IPTV service delivery to intelligently forward only those channels that are actually being watched by attached subscribers.e. This scenario allows the 7x50 to enable IGMP snooping (i. The S-VLAN can also be pushed by the 7750 SR on access egress toward the Ethernet BRAS (if required). As before the 7750 SR can either act as converged Broadband Network Gateway. for attached IP DSLAMs this is a consideration. In this case. This option works well with centralized subscriber management on the 7750 SR (routed CO). VPN multicast registration) for efficient IPTV channel distribution and also allows distributed subscriber management on the 7x50. Figure 9. depending on operational requirements. This is typically not an issue when aggregating subscribers from legacy ATM DLSAMs because these access nodes generally lack the capacity to deliver IPTV service. ATm to ethernet interworking using mPLS uplinks MPLS (Option A) MPLS (Option B) CO GigE/ 10GigE STM-1 7x50 MPLS network GBE 7750 SR HSI BRAS CPE VC: Voice VC: Data ATM DSLAM PPP Eth ATM VLAN translation PPP Eth C-VLAN 7705 SAR 7x50 GBE PPP Eth C-VLAN VPLS Lbl MPLS Lbl PPP Eth C-VLAN S-VLAN MPLS (Option A) MPLS (Option B) PPP Eth C-VLAN S-VLAN VPLS Lbl MPLS Lbl PPP Eth C-VLAN VPLS Lbl MPLS Lbl PPP Eth C-VLAN S-VLAN VPLS Lbl MPLS Lbl Push S-VLAN @ Service Egress PPP Eth C-VLAN S-VLAN No push required VoIP BRAS To support Lawful Intercept requirements. or on BRAS systems attached to it. The 7705 SAR tags subscriber traffic with both S and C-VLAN tags so that at egress of the MPLS cloud no further VLAN-tagging is required.An alternative to using residential SAPs for mapping subscriber traffic is shown in Figure 9 and is using MPLS uplinks to groom traffic to the IP service edge (7750 SR). combining IP Service edge and subscriber management capabilities. A consequence of using this option is that there is no possibility for IGMP snooping functions in combination with IP multicast distribution.. The S-VLAN tag can (optionally) be pushed in the 7705 SAR and defined per spoke SDP for the VPLS service. MPLS uplinks can be initiated at the 7705 SAR or at the edge of the Ethernet aggregation network.

IPv6 and dual stack subscriber management are an important requirement for the BNG though and the 7750 SR is fully compliant in this area. BRAS system) is also approaching the end of its technical and economical life cycle and in need of replacement. Legacy subscriber consolidation and service innovation The introduction of the Alcatel-Lucent 7705 Service Aggregation Router provides an elegant and cost-effective solution to enable service providers to shift investments from legacy ATM aggregation (and optionally SDH/SONET) to a more strategic and long term investment in next-generation broadband aggregation infrastructure. AlcatelLucent recommends conducting a network architecture review to determine the best option forward. Figure 10.. 5. even as the use of IPv6 is transparent in the specific Layer 2 aggregation applications described in this paper. The first motivation is legacy obsolescence: Many BRAS deployments are reaching their end-of-life. the Alcatel-Lucent 7705 SAR provides several options to aggregate and transport subscriber traffic from legacy ATM DSLAMs into an Ethernet/MPLS based broadband infrastructure.In conclusion. Some products are already manufacturer discontinued. However. The bnG in the TR-101 architecture for ethernet-based DSL aggregation NSP/BB network gateway A10-NSP L2TP A10-NSP NSP2 IP-QoS A10-NSP ASP1 IP-QoS A10-ASP IP BB network gateway Ethernet aggregation Access node (DSLAM) V Regional broadband network Access network V MDF NSP1 L2TS Access loop User1 NID CPE T User2 Customer prem.e. Legacy ATM Migration to IP/Ethernet | Application Note 9 . further research will likely point out that the legacy subscriber services edge ( i. The Alcatel-Lucent 7705 SAR is IPv6 ready. others simply do not have the horsepower or headroom to take on new requirements for rich multimedia content delivery and IPv6. there are various options for consolidating subscriber traffic from legacy ATM DSLAMs and IP DSLAMs on a converged Broadband Network Gateway. In addition to migrating the legacy ATM aggregation network. net. Which option is best depends on operational requirements expressed by the service provider. both technically and economically. and a replacement is needed. This discussion revolves around IP edge convergence on a Broadband Network Gateway (BNG) as defined in the TR-101 architecture standard by the Broadband Forum for multiservice delivery to residential consumers (see Figure 10). Aggregation network There are several motivations that drive service providers towards a consolidation of these various service edges into a single converged IP edge centered on the BNG. This is the subject of the following section.

Therefore. any existing Layer 2/ Usually deployed in more distributed way Goal Layer 3 overlay service models with separate Layer 2 and Layer 3 edges can either remain as they are. in order to benefit from superior bandwidth and innovative service options. there is a choice between a distributed or centralized deployment model: • The distributed BNG model offers good scalability and moves the subscriber management point closer to end users. Network elements that perform the role of subscriber and/or service edge are the most complex and heavily instrumented systems in a network. Service edge consolidation AA/DPI HSI edge Ethernet aggregation AN Video edge VoIP edge Today Dual edge HSI edge Ethernet aggregation AN Video edge Usually deployed in more distributed way Single edge Ethernet aggregation Converged and integrated BNG AN When consolidating multiple service edges in the BNG. A common BNG approach creates easy up-sell opportunities to existing consumers with the least amount of administrative overhead. the HSI/VoIP edge could potentially be more centralized than a video or multiservice BNG). Converging on a single IP edge yields the largest consolidation benefits and would result in a single touch point with the network for all subscriber services. Such IP service edge consolidation can be obtained in various manners with dual. • The centralized BNG model places higher scaling requirements on the BNG itself but may be advantageous in less densely populated areas or for a dual-edge strategy (e.or single-edge implementation models (see Figure 11). 10 Legacy ATM Migration to IP/Ethernet | Application Note . A converged service edge also makes it far easier to offer a seamless multi-screen service experience to the connected home. or can be consolidated further by having a converged BNG with integrated Layer 2 aggregation.g. if one can consolidate the amount of edge functionalities on fewer platforms. which is beneficial for peer-to-peer traffic management and allows for caching and insertion of popular content that is closer to end users than what a centralized BNG model allows. To implement the singleedge BNG strategy. Figure 11. Consolidating subscriber traffic from both legacy ATM DSLAMs and next-gen IP DSLAMs on a common Broadband Network Gateway will provide a more consistent service behavior across different access modalities and lower the operational threshold and effort involved in migrating subscribers from ATM to IP DSLAMs. there are more overarching concerns to reduce complexity and cost. or ideally only on one platform. both capital and operational expenditures. Whether this is feasible and desirable will largely depend on the capabilities of the BNG platform of choice and the preferences of the operational support organization.Besides obsolescence issues with legacy BRAS systems.. there can be significant cost synergies.

there is a separate application note (need title of document) available that describes the deployment capabilities of the Alcatel-Lucent 7750 SR as multiservice Broadband Network Gateway. service providers have overriding concerns of an operational nature. Many service providers have adopted a lean operational model that is sufficient to maintain dayto-day operations. solution validation.1 Multivendor Integration Multivendor network integration encompasses design. end-to-end solution. Legacy ATM Migration to IP/Ethernet | Application Note 11 .The Alcatel-Lucent 7750 Service Router is a TR-101 standard-compliant BNG that can operate as an integrated Layer 2/Layer 3 edge or as a Layer 3 edge in combination with the Alcatel-Lucent 7450 Ethernet Service Switch as the L2 edge. audio. thus providing an effective solution to manage the effort and risk involved with realizing an integrated. Alcatel-Lucent data integration and migration services Aside from the underlying network platform changes. 6. but potentially challenged when having to absorb the transient peak workload incurred by transformation. Alcatel-Lucent Residential Service Delivery Solution Verification is available on request. integration. 6. Layer 2 Tunnel Switch (L2TS) and/or Layer 2 Network Server (L2NS) • IPv6 and dual-stack subscriber management with Large Scale Network Address Translation • Full suite of network and service management support products such as the 5580 Home Network Manager. interoperability testing. Then there is the operational effort of turning up these new platforms and subsequently migrating over the subscribers and services. Besides offering full compliance with TR-101 architecture requirements. • Expanding choice with managed online services for residential consumers and content partners by leveraging Application Assurance technology to enable a premium Quality of Experience for Internet video. 5620 Service Aware Manager and 5750 Subscriber Services Controller • An experienced professional services organization to assist in the IP network transformation. These are cases where Alcatel-Lucent Services can lead the integration and migration project. In addition the Isocore Internetwork Lab recently conducted an independent validation of the entire BNG feature set of the 7750 SR. The integration service philosophy is based on the operational reality that service providers operate platforms from multiple vendors. voice. there is a learning curve in mastering new technologies and platforms. gaming and other value-added content • Offer secure remote VPN access over the Internet by means of the IPSec Integrated Service Adapter (Besides being attractive for business users. this is also applicable to scenarios such as mobile aggregation over virtual leased lines) • Complementary offering of Layer 2 and Layer 3 VLL and VPN services for business consumers to maximize economies of scale of the broadband access and aggregation network For the interested reader. Alcatel-Lucent provides these services for its own platforms and for those platforms that are integrated in the equipment of many other vendors. Meanwhile business must go on as usual. deploying the Alcatel-Lucent 7750 SR as a BNG offers a number of additional benefits: • Fully backwards compatible support for TR-059 BRAS functions based on PPP and L2TP as Layer 2 Aggregation Concentrator. First of all.). 24/7. for telecommunication operators. and migration of IP/MPLS deployments. These platforms must interwork with the Alcatel-Lucent solution before and after migration (Error! Reference source not found.

Results reaped by our customer partners are deployment cost reductions of up to 60% and. Performance benchmarks Transformation Multivendor data network migration services Capability preparation Data and telecom specific transformation methodologies Typical delivery costs Migration operation centers IP transformation centers Major IP/MPLS and VoIP/IMS migrations Risk Industry performance Multiple years Minimal 100% 0 0 Minimal All internal/wholly responsible With Alcatel-Lucent involvement < 1 year Over 70 “IP” transformations Reduced by ~60% 2 4 Over 100 countries Shared with Alcatel-Lucent 12 Legacy ATM Migration to IP/Ethernet | Application Note .Figure 12. and access to our global centers of excellence. Figure 13. in some cases. Alcatel-Lucent multivendor network integration Personalized IPTV IP Communications Broadband Internet services Optical Transport Mobile Centralized policy management IP/MPLS Backbone Enterprise Access Aggregation IP Service Edge Optical core Copper. These assets have maximized telecommunications operators’ capital investments in over 70 major IP/MPLS transformation projects including many that utilize Alcatel-Lucent 7705 SARs and 7750 SRs. planning and delivery tools. reduced project completion times by several years. fiber Multivendor integration areas Residential Network and service management The multivendor integration services include Alcatel-Lucent’s industry-proven services framework.

Figure 14. Legacy ATM Migration to IP/Ethernet | Application Note 13 .). The center has been able to reduce migration schedules by 50%. processes.6. there will usually be an objective to retire the legacy solution as soon as possible. All aspects of the migration process is controlled by the dedicated Migration Project Management function. which is responsible for specific management and reposting aspects related to migration planning. Achieving success requires careful planning and a detailed understanding of both the legacy solution and the target solution. Alcatel-Lucent is also capable of providing a complete execution and supervision service through its Migration Operations Center — a focused team and facility that manages migrations 24/7. proven in data and voice migration engagements in over 100 countries. once the new solution is in place. Migration experts work with service provider staff to develop the necessary support tools and procedures to migrate the customers and/or services (including all features) from one technology platform to another. and work with legacy ATM. With this centralized team of resources. and its operational knowledge base is the broadest in the industry because of its global focus on multivendor data network migration. DSL . FR.2 Multivendor data network migration Successful data network migration is essential to many projects in order to meet their primary business objectives. Retirement of the legacy platforms can only occur when all of the customers and services have been migrated to the new solution. The objective of the Data Network Migration Services program is to deliver a complete end-to-end migration solution to ensure success (see Error! Reference source not found. ensures a structured approach to the design and delivery of the migration program. the operator has the increased burden — both financially and technically — of having to support both platforms. Figure 13 highlights the importance of migration planning and the creation of teams. and tools to effectively facilitate mass scale changes.and other technologies and the latest IP/MPLS equipment from Alcatel-Lucent and other vendors. preparation and execution. it also ensures the solution is implemented in the same manner in all migrations throughout the service provider network. The center is able to handle migrations in any locale during any maintenance window. Alcatel-Lucent Data network migration Services 1 Strategic approach for migrations 2 Intelligent capability design FR ATM DSL PL Other IP MPLS GMPLS Ethernet 3 Fast and reliable executions Specialized labs MOC GNEICs 100s of IP engineers ALU SRCs Experience with over 500 NEs Upfront migration planning saved mid-sized European SP 25 million OPEX in 5 years 4 • Set up and manage a Migration Operations 24x7 • Coordination with NOC Get started in months rather than years Major data and voice migrations in 100+ countries – and – 70+ IP transformations Migration Operation Centre (MOC) Reduces migration schedule and execution resources requirements by 50% The Alcatel-Lucent migration methodology and processes. In most network transformation projects. While the two solutions are operating in parallel.

AlcatelLucent possesses an unmatched experience in IP network transformation. Conclusion The Alcatel-Lucent 7705 SAR and 7750 SR provide a unique and powerful combination to help you transform your legacy infrastructure and effectively take on business opportunities and delivery requirements pertaining to multimedia content. Datasheet 9. References and sources • Applying the Alcatel-Lucent 7750 Service Router for Multiservice Broadband Network Gateway. Alcatel-Lucent Residential Service Delivery Solution verification • Alcatel-Lucent 7750 Service Router. with deployments in over 60 carrier deployments worldwide. 8. Glossary of terms BNG BSAN BRAS Capex DHCP ESS HSI IPTV MPLS NPV Opex QoS RADIUS RG SAR SR VLAN VLL VPLS VoIP broadband network gateway broadband service access node broadband remote access server captital expenditures dynamic host configuration protocol Ethernet service switch high-speed Internet Internet protocol television Multiprotocol Label Switch Net Present Value Operational Expenditures quality of service remote authentication dial-in user service residential gateway service aggregation router service router Virtual local area network Virtual leased Line Service Virtual Private LAN Services voice over IP 14 Legacy ATM Migration to IP/Ethernet | Application Note . applications and Web 2. Our market-leading technology and expertise is at your service and on display in one of our IP transformation centers near you.7. Strategic white paper • Isocore Technical Report.0 subscriber traffic. Application note • High Leverage Residential Service Delivery IP transformation for profitable growth.

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