•Multiprotocol Extensions to BGP (RFC 2283).
•Tag unicast prefixes as multicast source prefixes for intra-domain mcast routing protocols to do RPF checks.
•WHY? Allows for interdomain RPF
checking where unicast and multicast
paths are non-congruent.
•DO I REALLY NEED IT?
•YES, if:
•ISP to ISP peering
•Multiple-homed networks
•NO, if:
•You are single-homed
•