Receiving SA Messages
Skip RPF Check and accept SA if:
Sending MSDP peer is default-peer
Sending MSDP peer = Mesh-Group peer
RPF Check the received SA message
If the MSDP peer IS THE originating RP – then accept.
Lookup best MBGP path to RP in SA message
Search mbest
If path to RP not found, RPF Check Fails; ignore SA message
Is the sending MSDP Peer also an MBGP peer?
Yes: Is best path to RP via this MBGP peer?
If yes, RPF Check Succeeds; process SA message
No: Is the first AS in the best path to RP = the first AS in the best path to MSDP
peer?
If yes, RPF Check Succeeds; process SA message