Configuration Guide User guide

1562 FastIron Configuration Guide
53-1002494-02
Multicast Source Discovery Protocol (MSDP)
However, if Source Active caching is enabled on the MSDP and RP router, the RP caches the Source
Active messages it receives. In this case, even if the RP does not have a receiver for a group when
the RP receives the Source Active message for the group, the RP can immediately send a Join for a
new receiver that wants to join the group, without waiting for the next Source Active message from
the RP in the source domain.
The maximum size of the cache used to store MSDP Source Active messages is 8K and the default
size is 4K.
MSDP configuration
To configure Multicast Source Discovery Protocol (MSDP) on a Layer 3 switch, perform the following
tasks:
• Enable MSDP
• Configure the MSDP peers
NOTE
The PIM Sparse Rendezvous Point (RP) is also an MSDP peer.
NOTE
Routers that run MSDP must also run BGP. Also, the source address used by the MSDP router
must be the same source address used by BGP.
Enabling MSDP
To enable MSDP, enter the router msdp command.
Brocade(config)# router msdp
NOTE
When enabling and disabling MSDP, you do not need to save the configuration and reload the
software. The configuration change takes effect immediately, as soon as you enter the CLI
command.
Syntax: [no] router msdp
Configuring MSDP peers
To configure an MSDP peer, enter the msdp-peer command at the MSDP configuration level.
Brocade(config-msdp-router)# msdp-peer 205.216.162.1
Syntax: [no] msdp-peer <ip-addr> [connect-source loopback <num>]
The <ip-addr> parameter specifies the IP address of the neighbor.
The connect-source loopback <num> parameter specifies the loopback interface you want to use
as the source for sessions with the neighbor.