Quick Reference Guide

530 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
IGMP V3
19
For example, two clients (Client A and Client B) belong to group1 but each is receiving traffic
streams from different sources. Client A receives a stream from (source_1, group1) and Client B
receives it from (source_2, group1). The router still waits for three seconds before it stops the
traffic because the two clients are in the same group. If the clients are in different groups, then the
three second waiting period is not applied and traffic is stopped immediately. The show ip igmp
group tracking command displays that clients in a group that are being tracked.
If a client sends a leave message, the client is immediately removed from the group. If a client does
not send a report during the the specified group membership time (the default is 140 seconds),
that client is removed from the tracking list.
Using the CLI
To enable the tracking and fast leave feature, enter commands such as the following.
PowerConnect(config)# interface ve 13
PowerConnect(config-vif-13)# ip igmp tracking
Syntax: ip igmp tracking
Setting the query interval
The IGMP query interval period defines how often a router will query an interface for group
membership. Possible values are 10 – 3,600 seconds and the default value is 60 seconds, but
the value you enter must be a little more than twice the group membership time.
To modify the default value for the IGMP query interval, enter the following.
PowerConnect(config)# ip igmp query-interval 120
Syntax: ip igmp query-interval <10-3600>
The interval must be a little more than two times the group membership time.
Setting the group membership time
Group membership time defines how long a group will remain active on an interface in the absence
of a group report. Possible values are from 20 – 7200 seconds and the default value is 140
seconds.
To define an IGMP membership time of 240 seconds, enter the following.
PowerConnect(config)# ip igmp group-membership-time 240
Syntax: ip igmp group-membership-time <20-7200>
Setting the maximum response time
The maximum response time defines the maximum number of seconds that a client can wait
before it replies to the query sent by the router. Possible values are 1 – 10. The default is 10.
To change the IGMP maximum response time, enter a command such as the following at the global
CONFIG level of the CLI.
PowerConnect(config)# ip igmp max-response-time 8
Syntax: [no] ip igmp max-response-time <num>