MR-350.pdf - Ethernet Virtual Private Networks MR-350...

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Ethernet Virtual Private Networks MR-350 February 2016 © The Broadband Forum. All rights reserved 1 of 8 Ethernet Virtual Private Networks for Integrated, Scalable Layer 2 and Layer 3 VPN Services Contents 1 Overview and Introduction ............................................................................................................................................. 2 2 Ethernet Virtual Private Networks (EVPN) ...................................................................................................................... 2 3 IP VPN and Ethernet VPN Services .................................................................................................................................. 2 4 Evolving Industry Deployments ....................................................................................................................................... 3 5 New VPN Requirements .................................................................................................................................................. 3 6 What is EVPN and Why is it a Recommended Solution? ................................................................................................. 3 7 Improved Network Efficiency .......................................................................................................................................... 4 8 Integrated Layer 2/Layer 3 Functionality ........................................................................................................................ 5 9 Resiliency and High Availability ....................................................................................................................................... 5 10 Reducing the Provisioning Pain ....................................................................................................................................... 6 11 Next Generation E-LINE/ E-LAN /E-TREE Use Case .......................................................................................................... 6 12 EVPN Business Bottom Line ............................................................................................................................................. 7 13 Summary and Ongoing EVPN Work ................................................................................................................................. 8 14 Acknowledgements ......................................................................................................................................................... 8 15 About the Broadband Forum ........................................................................................................................................... 8 Broadband Forum White Paper MR-350 February 2016
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Ethernet Virtual Private Networks MR-350 February 2016 © The Broadband Forum. All rights reserved 2 of 8 1 Overview and Introduction Ethernet Virtual Private Networks (EVPN) deliver a wide range of benefits including greater network efficiency, reliability, scalability, mobility and policy control that directly impact the bottom line of service providers and enterprises alike. This white paper provides an overview of EVPN, including its features and benefits. As customers expand their networks and move to use Network Function Virtualization (NFV) an integrated service interface that provides both Layer 3 as well as Layer 2 VPN services and lets the customer choose either one or both becomes very appealing. Carriers are constantly faced with the challenge of providing enhanced services to their customers in a cost effective manner. Layer 3 IP Virtual Private Networks (VPN) and Layer 2 Ethernet VPN services are established technologies for VPN service delivery in the carrier environment . Both approaches have strengths and limitations in addressing different market segments and this makes it desirable for carrier customers to combine them in solutions and therefore for a carrier to offer both. In such situations an integrated approach to providing these services gives an enhanced experience to the customer as well as reduces operational cost to the customer and provider. 2 Ethernet Virtual Private Networks (EVPN) EVPN is a next generation technology that was created to address the limitations of legacy Ethernet Layer 2 VPN and address new requirements. EVPN can already provide the MEF E-LAN service and standardization is in progress to support E-Line and E-Tree services. EVPN introduces control-plane based learning of MAC addresses. This enhances scalability and provides a mechanism to apply policies. The control-protocol chosen is Multiprotocol BGP (MP-BGP) and this underpins a scalable and resilient architecture that is similar to the proven architecture of IP VPNs.
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