Multicast Anycast RP

Anycast RP is a method to create redundancy of rendezvous point (RP) routers in a Multicast environment. It takes advantage of the use of Anycast.

The idea behind anycast RP is that we configure a single IP address on multiple routers and advertise it in our IGP. When you have multiple RPs with the same IP address, it means that our sources and receivers will always be routed to the closest RP based on the unicast Routing Table. PIM Join messages from receivers might be sent to one RP, while PIM designated routers register their local sources to another RP.

In such a scenario, those redundant RPs must be able to communicate with each other to synchronize their information between them. This is achieved using MSDP.

Links

https://networklessons.com/multicast/multicast-anycast-rp-configuration-cisco-ios