Multicast PIM sparse mode Rendezvous Point (RP)

When implementing multicast using PIM sparse mode, a router within the multicast topology must be elected as a Rendezvous Point (RP). An RP helps to coordinate its operation. An RP performs the following functions:

  • Each router that receives multicast traffic from a source will forward it to the RP.
  • Each router that wants to receive multicast traffic will send their request to the RP.

All multicast traffic will initially pass through the RP within a sparse mode PIM topology. Once multicast transmission has been established, the best path will be chosen for all subsequent multicast traffic.

The RP is elected using specific protocols including: