Configuring Igmp Fast Leave Processing - HP A6600 Configuration Manual

To do...
4. Configure the startup query
interval
5. Configure the startup query
count.
6. Configure the IGMP general
query interval.
7. Configure the maximum
response time for IGMP
general queries.
8. Configure the IGMP last
member query interval.
9. Configure the other querier
present interval.

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.
The IGMP fast leave processing configuration is effective only if the router is running IGMPv2 or IGMPv3.
Configuring IGMP fast leave processing globally
To do...
1. Enter system view.
2. Enter public network IGMP
view or VPN instance IGMP
view.
3. Configure IGMP fast leave
processing.
Use the command...
igmp startup-query-interval
interval
igmp startup-query-count value
igmp timer query interval
igmp max-response-time interval
igmp last-member-query-interval
interval
igmp timer other-querier-present
interval
Use the command...
system-view
igmp [ vpn-instance
vpn-instance-name ]
fast-leave [ group-policy
acl-number ]
77
Remarks
Optional
By default, the startup query
interval is 1/4 of the "IGMP
general query interval".
Optional.
By default, the startup query count
is set to the IGMP querier's
robustness variable.
Optional.
60 seconds by default.
Optional.
10 seconds by default
Optional.
1 second by default.
Optional.
By default, the other querier
present interval is [ IGMP general
query interval ] × [ IGMP
robustness variable ] + [ maximum
response time for IGMP general
queries ] / 2.
Remarks
—
—
Required.
Disabled by default.