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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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Clearing MLD Group Information

Clearing MLD Group Information


After MLD group entries are cleared, group members may fail to receive multicast data. Therefore, exercise caution when clearing MLD group information.


  • Run the reset mld explicit-tracking { all | interface interface-type interface-number [ host ipv6-host-address [ group ipv6-group-address [ source ipv6-source-address ] ] ] } command in the user view to remove hosts that dynamically join a multicast group using MLD from an interface.
  • Run the following commands in the user view to clear multicast group entries that are dynamically generated on an interface.

    • reset mld group all

    • reset mld group interface interface-type interface-number { all | ipv6-group-address [ ipv6-group-mask-length ] [ ipv6-source-address [ ipv6-source-mask-length ] ] }

  • Run the following commands in the user view to clear multicast group entries established with MLD SSM mapping.

    • reset mld group ssm-mapping all

    • reset mld group ssm-mapping interface interface-type interface-number { all | ipv6-group-address [ ipv6-group-mask-length ] }

Updated: 2019-04-08

Document ID: EDOC1100065742

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