DELL S6000-ON User Manual

ip msdp peer connect-source

Examples of Configuring and Viewing MSDP
    R3_E600(conf)#ip multicast-msdp

    R3_E600(conf)#ip msdp peer 192.168.0.1 connect-source Loopback 0

    R3_E600(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_E600#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

Example of the show ip msdp sa-cache Command

R3_E600#show ip msdp sa-cache

MSDP Source-Active Cache - 1 entries

GroupAddr  SourceAddr  RPAddr       LearnedFrom  Expire UpTime

239.0.0.1  10.11.4.2   192.168.0.1  192.168.0.1  76     00:10:44

Multicast Source Discovery Protocol (MSDP)

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