Chapter 12: Mpls Ip Vpn And Ip Vpn Lite; Navigation; Mpls Ip Vpn - Avaya 8800 Planning And Engineering

Chapter 12: MPLS IP VPN and IP VPN Lite

The Avaya Ethernet Routing Switch 8800/8600 supports Multiprotocol Label Switching (MPLS) and IP
Virtual Private Networks (VPN) to provide fast and efficient data communications. In addition, to support
IP VPN capabilities without the complexities associated with MPLS deployments, the Ethernet Routing
Switch 8800/8600 supports IP VPN Lite.
Use the design considerations provided in this section to help you design optimum MPLS IP VPN, and IP
VPN Lite networks.

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MPLS IP VPN

• IP VPN Lite
MPLS IP VPN
Beginning with Release 5.0, the Avaya Ethernet Routing Switch supports MPLS networking
based on RFC 4364 (RFC 4364 obsoletes RFC 2547). RFC 4364 describes a method by which
a Service Provider can use an IP backbone to provide IP Virtual Private Networks (VPNs) for its
customers. This method uses a peer model, in which the customer's edge routers (CE routers)
send their routes to the service provider's edge routers (PE routers). Data packets are tunneled
through the backbone, so that the core routers (P routers) do not need to know the VPN routes.
This means that the P routers can scale to an unlimited number of IP VPNs and also that no
configuration change is required on the P nodes when IP VPN services are added or removed.
VPN routes are exchanged between PE routers using Border Gateway Protocol (BGP) with
Multiprotocol extensions (BGP-MP).
There is no requirement for the CE routers at different sites to peer with each other or to have
knowledge of IP Virtual Private Networks (VPNs) across the service provider's backbone. The
CE device can also be a Layer 2 switch connected to the PE router.
RFC 4364 defines a framework for layer 3 VPNs over an IP backbone with BGP. It is commonly
deployed over MPLS but can use IPSec or GRE tunnels.
Avaya IP-VPN uses MPLS for transport.
Planning and Engineering — Network Design
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