Thursday, May 13, 2010 9:45 am - 10:15 am
MPLS and IP fast-reroute (FRR) technologies have been widely deployed, providing 50ms protection for the carried network services. Continued network node growth at a certain point requires network partitioning into smaller regions like subASes or IGP areas. This in turn exposes a weakness of the existing fast-reroute mechanisms which only provides protection on ingress and transit nodes but falls short to protect the endpoint of the service itself. This has significant ramification to multi-IGP-area or multi-AS networks as the ABR and ASBR routers become the weak element which cannot keep the fast-reroute promise of determinism and fast protection. This talk is about explaining a novel, MPLS centric, service restoration architecture, which provides 50ms restoration for BGP based services. Issues like control & forwarding plane scaling, reuse of exisiting IP/MPLS protocols as well as practical implementations considerations will be discussed. The talk will be complemented by presenting a network blueprint to make fast service restoration possible irrespective of network size, demonstrating that 50ms service restoration is feasible today using deployed forwarding hardware.