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Configuration Guide - IP Multicast

S7700 and S9700 V200R010C00

This document describes IP multicast basics and how to configure IP multicast features, including IGMP/MLD, PIM (IPv4&IPv6), MSDP, multicast VPN, Layer 3 multicast CAC, Layer 2 multicast CAC, IGMP/MLD snooping, and multicast VLAN, IPv4&IPv6 multicast route management, static multicast MAC address, multicast network.
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(Optional) Configuring the MSDP Mesh Group

(Optional) Configuring the MSDP Mesh Group


MSDP peers have been configured. For details, see Configuring MSDP Peers.


An autonomous system (AS) may contain multiple MSDP peers. To prevent these MSDP peers from flooding Source-Active (SA) messages, configure an MSDP mesh group to optimize data traffic control.

MSDP peers in a mesh group forward SA messages that are sent by a peer out of the mesh group and pass RPF checks to other members in the group. SA messages sent by a group member are accepted without RPF checks and are not forwarded to other group members. This prevents MSDP peers from flooding SA messages and simplifies the RPF check mechanism on MSDP peers

You can set up an MSDP mesh group by configuring the same mesh group name for multiple MSDP peers.


  1. Run:


    The system view is displayed.

  2. Run:

    msdp [ vpn-instance vpn-instance-name ]

    The MSDP view is displayed.

  3. Run:

    peer peer-address mesh-group name

    A remote MSDP peer is added to the mesh group.

    • peer-address: specifies the address of the remote MSDP peer.

    • name: specifies the name of the mesh group. Members of the same mesh group have the same group name.

    Configuration notes:

    • Every two members of a mesh group must set up an MSDP peer relationship.

    • Every two members of a mesh group must recognize each other as the member of the same mesh group.

    • One MSDP peer can join only one mesh group. If an MSDP peer is added to different mesh groups, the latest configuration takes effect.

Updated: 2019-08-21

Document ID: EDOC1000141903

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