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Configuration Guide - IP Multicast

CloudEngine 12800 and 12800E 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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Configuring Fast Leave for Member Ports

Configuring Fast Leave for Member Ports


When the switch receives IGMP Leave messages from a group member port, the fast leave function allows the switch to immediately delete forwarding entries of the member port but does not reset the aging timer.

  • Enable fast leave in a VLAN only when each interface in the VLAN is connected to one receiver host.

  • Fast leave takes effect for member ports in a VLAN only when the switch can process IGMPv2 or IGMPv3 messages.


  1. Run system-view

    The system view is displayed.

  2. Run vlan vlan-id

    The VLAN view is displayed.

  3. Run igmp snooping prompt-leave [ group-policy { acl-number | acl-name acl-name } ]

    Fast leave is configured on the member port.

    By default, no member port is allowed to fast leave a multicast group.

    You can limit the number of member ports that fast leave a multicast group by using the group-policy parameter. In this case, create an access control list (ACL) and configure an ACL rule. The default ACL rule permit is applicable to all multicast groups. Therefore, to enable the member ports to fast leave a specified multicast group, run the rule deny source any command. For details on how to configure an ACL, see "ACL Configuration" in the CloudEngine 12800 and 12800E Series Switches Configuration Guide - Security.

  4. Run commit

    The configuration is committed.

Updated: 2019-04-20

Document ID: EDOC1100074724

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