This section describes how to set up an MSDP peer relationship
between PIM-SM domains in an autonomous system (AS) and how to configure
MSDP peers to implement PIM-SM inter-domain multicast.
When multiple PIM-SM domains exist in an AS or multiple Rendezvous Points (RPs) serving different multicast groups exist in a PIM-SM domain, you are recommended to configure MSDP peer relationships between all RPs (including static RPs and Candidate-RPs (C-RPs)) and add all MSDP peers to a mesh group.
You can configure a static Reverse Path Forwarding (RPF) peer relationship between Rendezvous Points (RPs) in different ASs so that Source Active (SA) messages which sent by RPF peer do not need do RPF check.