Huawei quidway s7700 - Optional) Configuring Prompt Leave for Interfaces

Step 3 Run:
igmp-snooping group-policy acl-number [ version number ]
A multicast group policy is configured for the VLAN. Interfaces in the VLAN can dynamically
join only the multicast group that matches the specified ACL rules.
By default, no multicast group policy is available in a VLAN. That is, hosts in a VLAN can join
any multicast group. If the IGMP version is not specified for a multicast policy, the S7700 applies
the policy to all IGMP messages regardless of their versions.
NOTE
If an advanced ACL is referenced by the group-policy, the ACL applies to the multicast group regardless
of the protocol type specified in the ACL.
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2.3.9 (Optional) Configuring Prompt Leave for Interfaces
Prerequisite
A basic ACL is configured to specify the IP multicast groups that hosts can leave.
For the configuration of the ACL, see ACL Configuration in the Quidway S7700 Smart Routing
Switch Configuration Guide - Security.
Context
When an interface on the S7700 receives an IGMP Leave message from a host, the S7700 deletes
the forwarding entry that corresponds to the interface from the multicast forwarding table
immediately without waiting for the aging of the forwarding entry. This is called prompt leave.
When each interface in a VLAN is connected to only one host, you can enable prompt leave for
interfaces in the VLAN.
NOTE
Prompt leave takes effect for interfaces in a VLAN only when the S7700 can process IGMPv2 or IGMPv3
messages.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
vlan vlan-id
The VLAN view is displayed.
Step 3 Run:
igmp-snooping prompt-leave [ group-policy acl-number ]
Prompt leave is enabled for interfaces in the VLAN.
If group-policy acl-number is not specified, the S7700 immediately deletes the forwarding entry
corresponding to a member interface after receiving the Leave message from the interface.
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 2 IGMP Snooping Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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