The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] draft-gan-fast-reroute
At 06:40 PM 10/11/01 -0400, Arthi Ayyangar wrote: >Hi, > >> >> I have a question on the RRO handling in <draft-gan-fast-reroute>. >> >> Node1 ====> Node2 ======> Node3 =====> Node4 ======> Egress >> v ^ >> | | >> +-----------------------+ >> >> Notation: @(3-2) == IP address of node 3 on the link [node 3 - node 2]. >> >> Assume that the link between node 2 and node 3 fails. Then the detour >> [node 2 - node 4] is taking over. But what does node 2 then send in the >> RRO object of the RESV message to node 1: Does node 2 continue to send >> [@(2-1), @(3-2), @(4-3), @(egress-4)] or does node 2 send [@(2-1), >> @(detour between 4-2), @(egress-4)] or ...? >> >---> It would send , [@(2-1), @(detour between 4-2), @(egress-4)] >as the RRO in the Resv once the detour has taken over. No, the RRO in the RESV for the Primary LSP would not change. Node 2 would continue to send the same RRO as before the failure. If you look at lsp-tunnel-09.txt, there is a "local protection in-use" flag which could be set in the IPv4 subobject of the RRO, but the implementation of draft-gan with which I am familiar doesn't do this. Alia
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