Brocade Multi-Service IronWare Multicast Configuration Guide (Supporting R05.6.00) - Manual (Page 95)

Multi-Service IronWare Multicast Configuration Guide 83
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Configuring MSDP mesh groups
1
Clearing MSDP VRF statistics
To clear the MSDP VRF statistics by entering the following command.
Brocade# clear ip msdp vrf blue statistics
Syntax: clear ip msdp statistics [vrf vrf-name] [ip-addr]
The command in this example clears statistics for all the peers. To clear statistics for only a specific
peer, enter the IP address of the peer.
The command in this example clears all statistics for all the peers in the VRF “blue.”.
Configuring MSDP mesh groups
A PIM Sparse domain can have several RPs that are connected to each other to form an MSDP
mesh group. To qualify as a mesh group, the RPs have to be fully meshed; that is, each RP must be
connected to all peer RPs in a domain. (Refer to
Figure 10 .)
A mesh group reduces the forwarding of SA messages within a domain. Instead of having every RP
in a domain forward SA messages to all the RPs within that domain, only one RP forwards the SA
message. Since an MSDP mesh group is fully meshed, peers do not forward SA messages received
in a domain from one member to any member of the group. The RP that originated the SA or the
first RP in a domain that receives the SA message is the only one that forwards the message to the
members of a mesh group. An RP can forward an SA message to any MSDP router as long as that
peer is farther away from the originating RP than the current MSDP router.
Figure 10 shows an example of an MSDP mesh group. In a PIM-SM mesh group the RPs are
configured to be peers of each other. They can also be peers of RPs in other domains.
FIGURE 10 Example of MSDP mesh group