Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 2659

Changing the IGMP Snooping Group Query Membership Timeout Value (CLI Procedure)
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Documentation
Copyright © 2010, Juniper Networks, Inc.
Generally, you do not need to explicitly set the group membership timeout value for IGMP
snooping groups on an EX Series switch. The group membership timeout value, which
determines how long the switch waits before removing an IGMP snooping group from
its multicast cache table. is implicitly set to 260 seconds when you configure IGMP
snooping.
When you enable IGMP snooping on a switch, the
values are set to their default values and are applied to all VLANs
query-response-interval
created on the switch. The default values are:
query-interval —125 seconds
query-response-interval
The software automatically calculates the group membership timeout value for an IGMP
snooping-enabled switch by multiplying the
the query-response-interval
= 260.
If you need to explicitly set the group membership timeout value, you reset the
and
query-interval query-response-interval
level. (Notice that you are not resetting the values at the
hierarchy level.) When you reset these values, the IGMP snooping configuration inherits
the new values and recalculates the group membership timeout value accordingly. For
more information on changing these values, see the
Configuration Guide.
To change the IGMP snooping group membership timeout value to 350:
Configure the
query-interval
1.
[edit protocols]
user@switch# set igmp query-interval 150
Configure the query-response-interval
2.
[edit protocols]
user@switch# set igmp query-response-interval 50
Example: Configuring IGMP Snooping on EX Series Switches on page 2543
Verifying That the IGMP Snooping Group Query Timeout Value Has Been Changed
Correctly on page 2558
Configuring IGMP Snooping (CLI Procedure) on page 2551
Configuring IGMP Snooping (J-Web Procedure) on page 2552
Chapter 83: Configuring IGMP Snooping and Multicast
query-interval
—10 seconds
query-interval
value. For example, using the default values: (125 x 2) + 10)
values at the
value to be 150:
value to be 50:
and
value by 2 and then adding
hierarchy
[edit protocols igmp]
[edit protocols igmp-snooping]
Junos OS Multicast Protocols
2555