MBGP

• 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
  • YES – even if you congruent or single-homed
    • The rest of the mcast Internet IS NOT.

Notes: