Enable Msdp; Manage The Source-Active Cache - Dell C9000 Series Networking Configuration Manual

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
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
State Source SA
Multicast Source Discovery Protocol (MSDP)
Up/Down
684