Operation Manual – MulticastH3C S5500-EI Series Ethernet Switches Chapter 8 MSDP Configuration8-128.4.3 Configuring an MSDP Mesh GroupAn AS may contain multiple MSDP peers. You can use the MSDP mesh groupmechanism to avoid SA message flooding among these MSDP peers and optimize themulticast traffic.On one hand, an MSDP peer in an MSDP mesh group forwards SA messages fromoutside the mesh group that have passed the RPF check to the other members in themesh group; on the other hand, a mesh group member accepts SA messages frominside the group without performing an RPF check, and does not forward the messagewithin the mesh group either. This mechanism not only avoids SA flooding but alsosimplifies the RPF check mechanism, because BGP is not needed to run betweenthese MSDP peers.By configuring the same mesh group name for multiple MSDP peers, you can create amesh group with these MSDP peers.Follow these steps to create an MSDP mesh group:To do... Use the command... RemarksEnter system view system-view —Enter MSDP view msdp —Create an MSDP peer asa mesh group memberpeer peer-addressmesh-group nameRequiredAn MSDP peer does notbelong to any mesh groupby defaultNote:z Before grouping multiple routers into an MSDP mesh group, make sure that theserouters are interconnected with one another.z If you configure more than one mesh group name on an MSDP peer, only the lastconfiguration is effective.8.4.4 Configuring MSDP Peer Connection ControlMSDP peers are interconnected over TCP (port number 639). You can flexibly controlsessions between MSDP peers by manually deactivating and reactivating the MSDPpeering connections. When the connection between two MSDP peers is deactivated,SA messages will no longer be delivered between them, and the TCP connection isclosed without any connection setup retry, but the configuration information will remainunchanged.
