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CLI-based Configuration Guide - IP Multicast

AR500, AR510, and AR530 V200R007

This document describes the principles and configurations of IP multicast, and provides configuration examples.
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Configuring IGMP SSM Mapping

Configuring IGMP SSM Mapping

Pre-configuration Tasks

Enabling IGMP

Context

The source-specific multicast (SSM) model allows IGMPv3 hosts to specify the multicast sources which they want to receive data from. However, some hosts can only run IGMPv1 or IGMPv2. To enable these hosts to use the SSM service, configure IGMP SSM mapping on the industrial switch router. IGMP SSM mapping is implemented based on static SSM mapping entries on the industrial switch router. The industrial switch router converts (*, G) information in IGMPv1 and IGMPv2 Report messages to (S, G) information according to static SSM mapping entries to provide the SSM service for IGMPv1 and IGMPv2 hosts. By default, SSM group addresses range from 232.0.0.0 to 232.255.255.255. You can expand this range if required. For details, see (Optional) Configuring an SSM Group Policy.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The interface view is displayed.

  3. Run:

    igmp ssm-mapping enable

    IGMP SSM mapping is enabled on the interface.

    By default, IGMP SSM mapping is disabled on an interface.

    Enable IGMPv3 on industrial switch router interfaces to ensure that hosts running any IGMP version on a network segment can obtain the SSM service.

  4. Run:

    quit

    Return to the system view.

  5. Run:

    igmp [ vpn-instance vpn-instance-name ]

    The IGMP view is displayed.

  6. Run:

    ssm-mapping group-address { group-mask | group-mask-length } source-address

    An SSM mapping rule is configured to map a group address to a multicast source.

    By default, no SSM mapping rule is configured.

Checking the Configuration

Run the following commands in any view to check the configured mapping entries and whether IGMP SSM mapping is enabled on the interface.

  • Run the display igmp [ vpn-instance vpn-instance-name | all-instance ] group [ group-address | interface interface-type interface-number ]* ssm-mapping [ verbose ] command to check information about group memberships established with IGMP SSM mapping.
  • Run the display igmp [ vpn-instance vpn-instance-name | all-instance ] ssm-mapping { group [ group-address ] | interface [ interface-type interface-number ] } command to check SSM mapping entries configured and whether IGMP SSM mapping is enabled on an interface.
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Updated: 2019-06-12

Document ID: EDOC1000097280

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