Operation Manual - Multicast
Quidway S3500 Series Ethernet Switches Chapter 5 IGMP Configuration
Huawei Technologies Proprietary
5-5
By default, the interval is 60 seconds.
5.2.6 Configure the Present Time of IGMP Querier
The IGMP querier present timer defines the period of time before the router takes over
as the querier sending query messages, after the previous querier has stopped doing
so.
Perform the following configuration in interface view.
Table 5-5 Configure the present time of IGMP querier
Operation Command
Change the present time of IGMP
querier
igmp timer other-querier-present
seconds
Restore the default value
undo igmp timer other-querier-present
By default, the value is 120 seconds. If the router has received no query message
within twice the interval specified by the igmp timer query command, it will regard the
previous querier invalid.
5.2.7 Configure Maximum Response Time for IGMP Query Message
When a router receives a query message, the host will set a timer for each multicast
group it belongs to. The value of the timer is randomly selected between 0 and the
maximum response time. When any timer becomes 0, the host will send the
membership report message of the multicast group.
Setting the maximum response time reasonably can enable the host to respond to
query messages quickly. In this case, the router can fast master the existing status of
the members of the multicast group.
Perform the following configuration in interface view.
Table 5-6 Configure the maximum response time for IGMP query message
Operation Command
Configure the maximum response time for IGMP
query message
igmp max-response-time
seconds
Restore the maximum query response time to the
default value
undo igmp
max-response-time
The smaller the maximum query response time value, the faster the router prunes
groups. The actual response time is a random value in the range from 1 to 25 seconds.
By default, the maximum query response time is 10 seconds.
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