ip multicast age-interval

Configures the time that group entries can remain in an IGMP group table on a specific VLAN or on all VLANs.
Syntax
ip multicast age-interval[vlanvlan-id]interval
no ip multicast age-interval[vlanvlan-id]interval
Command Default

Group entries can remain in the IGMP group table for up to 260 seconds.

Parameters
vlanvlan-id
Specifies a VLAN.
interval
Specifies time, in seconds, that group entries can remain in the IGMP group table. The range is 20 through 26000 seconds. The default is 260 seconds.
Modes

Global configuration mode

Usage Guidelines

When entered without the vlan keyword, this command configures the time that group entries can remain in an IGMP group table on all VLANs.

When a device receives a group membership report it makes an entry for that group in the IGMP group table. You can configure the ip multicast age-interval to specify how long the entry can remain in the table before the device receives another group membership report. When multiple devices are connected, they must all be configured for the same age interval, which must be at least twice the length of the query interval, so that missing one report does not stop traffic.

Non-querier age intervals must be the same as the age interval of the querier.

Note: When there are two or more possible queriers, it is recommended to configure the IP multicast age interval to 20 seconds more than the default calculated age interval on all switches enabled with IGMP snooping. This prevents the aging of groups when the active querier fails.

The no form of this command restores the default age interval to 260 seconds.

Examples

This example configures the IGMP group-table age interval to 280 seconds. 

device#configure terminal
device(config)#ip multicast age-interval 280
Parent topic: Commands I