Configuring an MSDP mesh group
An AS might contain multiple MSDP peers. You can use the MSDP mesh group mechanism to avoid SA message flooding among these MSDP peers and to optimize the multicast traffic.
In an MSDP mesh group, member MSDP peers forward SA messages that passed the RPF check from outside the mesh group to the other members in the mesh group. If a mesh group member receives an SA message from another member, it neither performs an RPF check on the message nor forwards the message to the other members.
This mechanism not only avoids SA message flooding but also simplifies the RPF check mechanism because you do not need to run BGP between these MSDP peers.
To organize multiple MSDP peers in a mesh group, assign these MSDP peers to the same mesh group. Before doing this, make sure the routers are interconnected with one another.
To configure an MSDP mesh group:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter MSDP view. | msdp [ vpn-instance vpn-instance-name ] | N/A |
3. Configure an MSDP mesh group.. | peer peer-address mesh-group name | By default, an MSDP peer does not belong to any mesh group. If you assign an MSDP peer to multiple mesh groups, the most recent configuration takes effect. |