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