H3C Technologies H3C S12500 Series Switches - Manual (Page 110)

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Step Command Remarks
8. Configure the IGMP
last-member query interval. last-member-query-interval
interval
1 second by default.
9. Configure the other querier
present interval.
timer other-querier-present
interval
By default, the other querier
present interval is [ IGMP general
query interval ] × [ IGMP
robustness variable ] + [ maximum
response time for IGMP general
queries ] / 2.
To configure IGMP query and response parameters on an interface:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure the IGMP querier's
robustness variable.
igmp robust-count robust-value
2 by default.
A higher robustness variable
makes the IGMP querier more
robust, but results in longer
multicast group timeout time.
4. Configure the startup query
interval.
igmp startup-query-interval
interval
By default, the startup query
interval is one-quarter of the "IGMP
general query interval."
5. Configure the startup query
count.
igmp startup-query-count value
By default, the startup query count
is the same as the IGMP querier's
robustness variable.
6. Configure the IGMP general
query interval.
igmp timer query interval 60 seconds by default.
7. Configure the maximum
response delay for IGMP
general queries.
igmp max-response-time interval 10 seconds by default.
8. Configure the IGMP last
member query interval. igmp last-member-query-interval
interval
1 second by default.
9. Configure the other querier
present interval.
igmp timer other-querier-present
interval
By default, the other querier
present interval is [ IGMP general
query interval ] × [ IGMP
robustness variable ] + [ maximum
response time for IGMP general
queries ] / 2.
Configuring IGMP fast-leave processing
In some applications, such as ADSL dial-up networking, only one multicast receiver host is attached to a
port of the IGMP querier. To allow fast response to the leave messages of the host when it switches
frequently from one multicast group to another, you can enable IGMP fast-leave processing on the IGMP
querier.