Multicast Bidirectional PIM Notes
Multicast Bidirectional PIM
Sources don’t register anymore
– BIDIR-PIM is a two-way multicast tree which is originated at the RP and goes to all LHRs
– Sources can start directly sending traffic to the RP without registering
-> RP will receive the multicast traffic
-> If there are no receivers, the traffic is dropped
– The receiver must send (*,g) join messages to the RP
– After receving the first multicast traffic, the receivers do not try to switch to SPT (s,g)
Configuring BIDIR-PIM
1. Activate BIDIR on all routers
ip pim bidir enable
2. Activate RP for BIDIR operations
-> Manual
ip pim rp-address <ip add> bidir
-> Auto-RP
ip pim send-rp-announce <int> scope <ttl> bidir
-> BSR – RP
ip pim rp-candidate <int> bidir
sh ip pim rp mapping
sh ip mroute
-> Will always show (*,g)