Context
After receiving a Leave message from a host, the querier reports the message to the upstream
router instead of sending a Last Member Query message. This process is called IGMP prompt
leave. In this manner, the delay in response is reduced and the bandwidth occupied by various
messages is saved.
NOTE
l IGMP prompt leave is applicable only to IGMPv2.
l When the IGMP version is IGMPv1 or IGMPv3, the IGMP prompt leave does not take effect even
if there is information about this function in current configuration.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
The S9300 communicates with hosts through this interface. On the S9300, VLANIF interfaces
and loopback interfaces support IGMP.
Step 3 Run:
igmp prompt-leave [ group-policy basic-acl-number ]
The S9300 leaves the group immediately without sending the Last Member Query message.
By default, the S9300 sends the Last Member Query message after receiving a Leave message
from a host.
----End
2.5.6 Checking the Configuration
Prerequisite
The configuration of basic IGMP functions and parameters is complete.
Procedure
l Run the display igmp group [ group-address | interface interface-type interface-
number ] [ static | verbose ] command to check the information about members of an IGMP
multicast group.
l Run the display igmp interface [ interface-type interface-number ] [ verbose ] command
to check the configuration and running status of IGMP on the interface.
l Run the display igmp routing-table [ group-address [ mask { group-mask | group-mask-
length } ] | source-address [ mask { source-mask | source-mask-length } ] ]
*
[ static ]
command to check the information about the IGMP routing table.
Run the preceding command, and you can obtain the following result:
Quidway S9300 Terabit Routing Switch
Configuration Guide - Multicast 2 IGMP Configuration
Issue 01 (2009-07-28) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
2-15
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