Anycast-Rendezvous Point (RP) is a feature supporting the configuration of several RPs with the same address in a PIM-SM domain. Peer relationships are established between RPs so that the multicast source can register with the topologically closest RP and the multicast receiver can join the closest RP. This alleviates burdens on RPs, implements RP backup, and optimizes multicast forwarding paths.
In a traditional PIM-SM domain, each multicast group is mapped only to one RP. When the network is overloaded or traffic congests on an RP, the RP may be overburdened.
If the RP fails, routes are converged slowly or multicast packets are forwarded over non-optimal paths. To resolve these issues, configure PIM Anycast-RP.