Configuring an MSDP mesh group
About MSDP mesh groups
This feature avoids SA message flooding among MSDP peers within an AS. It also simplifies the RPF check mechanism because you do not need to run BGP or MBGP between these MSDP peers.
When receiving an SA message from outside the mesh group, a member MSDP peer performs the RPF check on the SA message. If the SA message passes the RPF check, the member MSDP peer floods the message to the other members in the mesh group. When receiving an SA message from another member, the MSDP peer neither performs an RPF check on the message nor forwards the message to the other members.
To organize multiple MSDP peers in a mesh group, assign the same mesh group name to these MSDP peers.
Restrictions and guidelines
Before you configure an MSDP mesh group, make sure the devices are interconnected with one another.
If you assign an MSDP peer to multiple MSDP mesh groups, the most recent configuration takes effect.
Procedure
Enter system view.
system-view
Enter MSDP view.
msdp [ vpn-instance vpn-instance-name ]
Configure an MSDP mesh group.
peer peer-address mesh-group name
By default, an MSDP peer does not belong to any mesh group.