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Configuration Guide - IP Multicast

CloudEngine 8800, 7800, 6800, and 5800 V200R005C00

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, PIM (IPv4), PIM (IPv6), MSDP, multicast VPN, multicast route management (IPv4), multicast route management (IPv6), IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN, multicast network management.
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Configuring MLD Snooping SSM Mapping

Configuring MLD Snooping SSM Mapping

Context

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

  • SSM mapping applies only to the scenario where MLD snooping in a VLAN can process MLDv2 messages.

  • Although SSM mapping takes effect only for MLDv2 messages in a VLAN, a switch does not convert MLDv1 messages into MLDv2 messages before sending the messages to router ports. You can configure MLD snooping proxy or MLD snooping Report suppression on the switch to enable the switch to convert MLDv1 messages into MLDv2 messages before sending the messages to router ports.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run vlan vlan-id

    The VLAN view is displayed.

  3. Run mld snooping version 2

    The MLD snooping version is set to MLDv2 in the VLAN.

    The default version is MLDv2, and the switch can process MLDv2 messages.

    NOTE:

    The CE6810LI does not support this command, and can process only MLDv1 messages.

  4. Run mld snooping ssm-mapping enable [ policy policy-name ]

    SSM mapping is enabled in the VLAN.

    By default, SSM mapping is disabled in a VLAN.

  5. Configure mappings between multicast groups and multicast sources.

    NOTE:

    Multicast group addresses used in the following steps are included in the SSM group address range. For details on how to configure an SSM group address range, see (Optional) Configuring an SSM Group Policy.

    • If you do not specify policy policy-name in step 4, run the mld snooping ssm-mapping group-address mask-length source-address command to configure the mapping between a multicast group address and a multicast source address.
    • If you specify policy policy-name in step 4, perform the following steps:
      1. Run quit

        Return to the system view.

      2. Run ssm-mapping ipv6 policy policy-name

        The SSM mapping policy view is displayed.

      3. Run group group-address group-mask source source-address

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

    The mapping configured in the SSM mapping policy view can be applied to multiple VLANs, whereas the mapping configured in the VLAN view takes effect only in the current VLAN. To apply the same mapping to multiple VLANs, you are advised to configure an SSM mapping policy.

  6. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100039595

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