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Configuration Guide - IP Multicast

S7700 and S9700 V200R013C00

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, IPv4 PIM, IPv6 PIM, MSDP, multicast VPN, layer 3 multicast CAC, IPv4 multicast route management, IPv6 multicast route management, IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN replication, layer 2 multicast CAC, multicast network management.
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Configuring VSI-based IGMP Snooping SSM Mapping

Configuring VSI-based IGMP Snooping SSM Mapping

Pre-configuration Tasks

Enabling IGMP Snooping

Configuration Procedure

Configuring IGMP Snooping Multicast SSM Mapping is mandatory and (Optional) Configuring an SSM Group Policy is optional.

(Optional) Configuring an SSM Group Policy


If a user joins an any-source multicast (ASM) group, configure a source-specific multicast (SSM) group policy in the virtual switching instance (VSI) to add the multicast group address to the SSM group address range.

By default, the access control list (ACL) applied to an SSM group policy denies all multicast groups. To exclude specific group addresses from the SSM group address range, use a rule permit source any rule with deny rules in the ACL.


  1. Run system-view

    The system view is displayed.

  2. Run vsi vsi-name

    The VSI view is displayed.

  3. Run igmp-snooping ssm-policy basic-acl-number

    An SSM group policy is configured.

    By default, SSM group addresses range from to After you configure an SSM group policy, the multicast groups specified in the SSM policy are treated as SSM groups.

Configuring IGMP Snooping Multicast SSM Mapping


By configuring SSM mapping, you can set up one-to-one mappings between multicast groups and multicast sources.

SSM mapping applies to a VSI only when the IGMP snooping version running in the VSI is V3.


  1. Run system-view

    The system view is displayed.

  2. Run vsi vsi-name

    The VSI view is displayed.

  3. Run igmp-snooping version 3

    The IGMP snooping version is set to V3.

    The default IGMP snooping version is V2, but this version does not support SSM mapping.

  4. Run igmp-snooping ssm-mapping enable

    SSM mapping is enabled in the VSI.

    By default, SSM mapping is disabled.

  5. Run igmp-snooping ssm-mapping ip-group-address { ip-group-mask | mask-length } ip-source-address

    The mapping between a multicast group address and a multicast source is configured.

Verifying the IGMP Snooping SSM Mapping Configuration


The SSM mapping configuration is complete.


  • Run the display igmp-snooping port-info [ vsi vsi-name [ group-address group-address ] ] [ verbose ] command to check information about IGMP snooping interfaces.
Updated: 2019-04-08

Document ID: EDOC1100065742

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