Per VPN Routing for Layer 3 PPVPNs
Cosine
This document describes a method to do Per VPN routing for L3 PPVPNs. The solution uses BGP for auto-discovery of VPN membership, but uses Per VPN RIP instances and dynamic MPLS tunnel interfaces to exchange customer routes. The document proposes modifications to the RIP protocol to the make the solution scalable. The framework presented also supports deployment of multicast routing and forwarding for L3 PPVPNs without enabling multicast in the core.