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Configuration Guide - IP Multicast

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

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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Clearing IGMP Snooping Entries

Clearing IGMP Snooping Entries

Context

IGMP snooping entries are classified into static and dynamic entries, and they are cleared in different ways.

Static entries cannot be restored after being cleared and can be created when you configure static member ports.

When dynamic entries in a forwarding table are cleared, the hosts in the VLAN do not receive the multicast packets temporarily. The hosts in the VLAN receive the multicast packets again only after the hosts send IGMP Report messages and the forwarding entries are regenerated on the switch.

Procedure

  • Run the undo igmp snooping static-group [ source-address source-ip-address ] group-address group-ip-address vlan { all | { vlan-id1 [ to vlan-id2 ] } &<1-10> } command in the interface view to remove the interface from a multicast group.

    You can run the following commands to batch remove the multicast group addresses that the interface joins.

    • undo igmp snooping static-group [ source-address source-ip-address ] group-address group-ip-address1 to group-ip-address2 vlan vlan-id
    • undo igmp snooping static-group [ source-address source-ip-address ] group-address all vlan { all | { vlan-id1 [ to vlan-id2 ] } &<1-10> }

  • Run the reset igmp snooping group { all | vlan { all | vlan-id } } command in the user view to remove dynamic entries in a forwarding table.
  • Run the reset igmp snooping qinq-group { all | interface interface-type interface-number [ pe-vid pe-vid [ group-address [ mask { group-mask | group-mask-length } ] [ source-address [ mask { source-mask | source-mask-length } ] ] ] ] } command in the user view to remove multicast entries on the Layer 3 sub-interfaces.
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Updated: 2019-04-20

Document ID: EDOC1100075361

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