Brocade TurboIron 24X Series Configuration Guide - Manual (Page 812)

778 Brocade TurboIron 24X Series Configuration Guide
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Configuring IGMP snooping
The <interval> parameter specifies the time between queries. You can specify a value from 10 -
3600 seconds. The default is 125 seconds.
Modifying the maximum response time
The maximum response time is the number of seconds that a client can wait before responding to
a query sent by the switch. The default response time is 10 seconds maximum.
To change the maximum response time, enter a command such as the following
TurboIron(config)#ip multicast max-response-time 5
Syntax: [no] ip multicast max-response-time <interval>
For <interval>, enter a value from 1 – 10 seconds. The default is 10 seconds.
Configuring report control
A device in passive mode forwards reports and leave messages from clients to the upstream router
ports that are receiving queries.
You can configure report control to rate-limit report forwarding within the same group to no more
than once every 10 seconds. This rate-limiting does not apply to the first report answering a
group-specific query.
NOTE
This feature applies to IGMP V2 only. The leave messages are not rate limited.
IGMP V2 membership reports of the same group from different clients are considered to be the
same and are rate-limited.
Use the following command to alleviate report storms from many clients answering the upstream
router query.
TurboIron(config)#ip multicast report-control
Syntax: [no] ip multicast report-control
The original command, ip igmp-report-control, has been renamed to ip multicast report-control. The
original command is still accepted; however, it is renamed when you issue a show configuration
command.
Modifying the wait time before stopping traffic when receiving a leave
message
You can define the wait time before stopping traffic to a port when a leave message is received.
The device sends group-specific queries once per second to ask if any client in the same port still
needs this group. The value range is from 1 to 5, and the default is 2. Due to internal timer
granularity, the actual wait time is between n and (n+1) seconds (n is the configured value).
TurboIron(config)#ip multicast leave-wait-time 1
Syntax: [no] ip multicast leave-wait-time <num>
<num> is the number of seconds from 1 to 5. The default is 2 seconds.