HP FlexNetwork 7500 Series Configuration Manual page 93

•
You can configure the IGMP query and response parameters either for the current port in
interface view or globally for all ports in IGMP view. The configuration made in interface view
takes priority over the configuration made in IGMP view.
•
To avoid frequent IGMP querier changes, set the IGMP other querier present timer greater than
the IGMP general query interval. In addition, configure the same IGMP other querier present
timer for all IGMP routers on the same subnet.
•
To avoid mistakenly deleting multicast receivers, set the IGMP general query interval greater
than the maximum response time for IGMP general queries.
•
To speed up the response to IGMP queries and avoid simultaneous timer expirations that cause
IGMP report traffic bursts, set an appropriate maximum response time.
For IGMP general queries, the maximum response time is set by the max-response-time
command.
For IGMP group-specific queries and IGMP group-and-source-specific queries, the
maximum response time equals the IGMP last member query interval.
•
The following configurations take effect only on the devices that run IGMPv2 and IGMPv3:
Maximum response time for IGMP general queries.
IGMP last member query interval.
IGMP last member query count.
IGMP other querier present interval.
Configuring the IGMP query and response parameters globally
Step
Enter system view.
1.
Enter IGMP view.
2.
Set the IGMP querier's
3.
robustness variable.
Set the IGMP startup query
4.
interval.
Set the IGMP startup query
5.
count.
Set the IGMP general query
6.
interval.
Set the IGMP last member
7.
query interval.
Set the IGMP last member
8.
query count.
Set the maximum response
9.
time for IGMP general
queries.
10. Set the IGMP other querier
present timer.
Command
system-view
igmp [ vpn-instance
vpn-instance-name ]
robust-count count
startup-query-interval interval
startup-query-count count
query-interval interval
last-member-query-interval
interval
last-member-query-count count
max-response-time time
other-querier-present-interval
interval
83
Remarks
N/A
N/A
By default, the IGMP querier's
robustness variable is 2.
By default, the IGMP startup
query interval equals one quarter
of the IGMP general query
interval.
By default, the IGMP startup
query count equals the IGMP
querier's robustness variable.
By default, the IGMP general
query interval is 125 seconds.
By default, the IGMP last member
query interval is 1 second.
By default, the IGMP last member
query count equals the IGMP
querier's robustness variable.
By default, the maximum
response time for IGMP general
queries is 10 seconds.
By default, the IGMP other querier
present timer is [ IGMP general
query interval ] × [ IGMP
robustness variable ] +
[ maximum response time for
IGMP general queries ] / 2.