Chapter 7. Multiprotocol Extensions for BGP (MBGP)
This chapter describes in detail how routers use MBGP to transfer route information used for the reverse path forwarding (RPF) checks of the PIM and MSDP protocols. RPF checks can be performed on the same routing table used by the router to forward unicast traffic…However, splitting these two functions over two separate tables provides the flexibility to enforce different policies for unicast and multicast traffic and to create incongruent topologies for each.
Overview
MBGP is used to populate a separate routing table dedicated for the RPF mechanisms used when forwarding multicast packets, forwarding certain PIM-SM messages, and deciding whether to accept MSDP Source-Active (SA) messages.
The reason ...
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