Design of multicast MSDP peering between campus buildings?

Unanswered Question
Sep 21st, 2007

What's the appropriate design of multicast MSDP peering in this scenario?

1. Multiple buildings in a campus. Each building has two 6509 Layer 3 switches as building distribution layer and also configured as building's multicast RP routers.

2. There's no BGP between buildings or between the two switches in a building. All OSPF.

Should the two switches in a building be MSDP peers?

Should each switch in a building have RP routers in other buildings as MSDP peers?

Should the peers be MSDP default-peer? since they are not BGP peers.



I have this problem too.
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owillins Thu, 09/27/2007 - 11:37

An MSDP peer of the local router is probably a BGP peer also. However, if you do not want to have or cannot have a BGP peer, you could define a default MSDP peer from which to accept all SA messages. The default MSDP peer must be a previously configured MSDP peer. Perform this task when you are not BGP- or MBGP-peering with an MSDP peer. If a single MSDP peer is configured, a router will always accept all SA messages sent to it from that peer.


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