BIDIR-PIM
- Superset of PIM-SM
- No (S,G) entries
- Traffic can flow up and down the same tree.
- Still needs RPs
- RP must be dedicated to BIDIR-PIM.
- Each bidirectional link has a DF election.
- Ingress packets on any PIM interface can be forwarded downstream onto DF links.
- No DF links, no forwarding.
- Ingress packets to a DF can be forwarded upstream via the RPF towards the RPA.
- Ingress packets on any PIM interface can be forwarded downstream onto DF links.
References
RFC 5015: Bidirectional Protocol Independent Multicast (BIDIR-PIM) | RFC Editor