R3721-F3210-F3171-HP High-End Firewalls Network Management Configuration Guide-6PW101

Table Of Contents
571
Ste
p
Command Remarks
4. Configure the startup query
interval.
igmp startup-query-interval interval
By default, the startup
query interval is 1/4 of the
"IGMP general query
interval".
5. Configure the startup query count.
igmp startup-query-count value
By default, the startup
query count is set to 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
time 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.
CAUTION:
Make sure the other querier present interval is greater than the IGMP
g
eneral query interval. Otherwise
the IGMP querier might change frequently on the network.
Make sure the IGMP general query interval is greater than the maximum response time for IGMP
general queries. Otherwise, multicast group members might be wrongly removed.
The configurations of the maximum response time for IGMP general queries, the IGMP last member
query interval and the IGMP other querier present interval are effective only for IGMPv2 and IGMPv3.
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.
With fast leave processing enabled, after receiving an IGMP leave message from a host, the IGMP
querier directly sends a leave notification to the upstream without sending IGMP group-specific queries
or IGMP group-and-source-specific queries. Thus, the leave latency is reduced on one hand, and the
network bandwidth is saved on the other hand.
To configure IGMP fast leave processing globally:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter public network IGMP view.
igmp N/A