Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 571

Enable MSDP Enable MSDP by peering RPs in different administrative domains. 1 Enable MSDP. CONFIGURATION mode ip multicast-msdp 2 Peer PIM systems in different administrative domains. CONFIGURATION mode ip msdp peer connect-source Example of Configuring and Viewing MSDP R3(conf)#ip multicast-msdp R3(conf)#ip msdp peer 192.168.0.1 connect-source Loopback 0 R3(conf)#do show ip msdp summary Peer Addr Local Addr State Source SA Up/Down Description To view details about a peer, use the show ip msdp peer command in EXEC privilege mode. Multicast sources in remote domains are stored on the RP in the source-active cache (SA cache). The system does not create entries in the multicast routing table until there is a local receiver for the corresponding multicast group. R3#show ip msdp peer Peer Addr: 192.168.0.1 Local Addr: 192.168.0.3(639) Connect Source: Lo 0 State: Established Up/Down Time: 00:15:20 Timers: KeepAlive 30 sec, Hold time 75 sec SourceActive packet count (in/out): 8/0 SAs learned from this peer: 1 SA Filtering: Input (S,G) filter: none Output (S,G) filter: none Manage the Source-Active Cache Each SA-originating RP caches the sources inside its domain (domain-local), and the sources which it has learned from its peers (domain-remote). By caching sources: • domain-local receivers experience a lower join latency • RPs can transmit SA messages periodically to prevent SA storms • only sources that are in the cache are advertised in the SA to prevent transmitting multiple copies of the same source information Viewing the Source-Active Cache To view the source-active cache, use the following command. • View the SA cache. EXEC Privilege mode show ip msdp sa-cache Multicast Source Discovery Protocol (MSDP) 571