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.