Multicast Source Discovery Protocol | 617Configuring Multicast Source Discovery ProtocolConfiguring MSDP is a three-step process:1. Enable an exterior gateway protocol (EGP) with at least two routing domains.Figure 28-5 and MSDP Sample Configurations on page 638 show the OSPF-BGP configuration usedin this chapter for MSDP. Otherwise, see Chapter 32, Open Shortest Path First (OSPFv2 andOSPFv3), on page 691 and Chapter 10, Border Gateway Protocol IPv4 (BGPv4), on page 205.2. Configure PIM-SM within each EGP routing domain.Figure 28-5 and MSDP Sample Configurations on page 638 show the PIM-SM configuration in thischapter for MSDP. Otherwise, see Chapter 34, PIM Sparse-Mode, on page 755.3. Enable MSDP. See page 622.4. Peer the RPs in each routing domain with each other. See page 622.Related Configuration Tasks• Enable MSDP on page 622• Manage the Source-active Cache on page 622• Accept Source-active Messages that fail the RFP Check on page 624• Limit the Source-active Messages from a Peer on page 626• Prevent MSDP from Caching a Local Source on page 627• Prevent MSDP from Caching a Remote Source on page 628• Prevent MSDP from Advertising a Local Source on page 629• Terminate a Peership on page 630• Clear Peer Statistics on page 631• Clear Peer Statistics on page 631• Debug MSDP on page 632• MSDP with Anycast RP on page 632• MSDP Sample Configurations on page 638
