configure igmp snooping timer

configure igmp snooping timer router_timeout host_timeout {vr vrname} {vlan vlan_name}

Description

Configures the IGMP snooping timers.

Syntax Description


`router_timeout`	Specifies the time in seconds before removing a router snooping entry.
`host_timeout`	Specifies the time in seconds before removing a host‘s group snooping entry.
`vrname`	Specifies a virtual router.
`vlan_name`	Specifies the VLAN name. If no VLAN is specified, the setting is applied to all existing VLANs.

Default

The router timeout default setting is 260 seconds. The host timeout setting is 260 seconds.

Usage Guidelines

Timers should be set to approximately 2.5 times the router query interval in use on the network. Specify the following:

router timeout—The maximum time, in seconds, that a router snooping entry can remain in the IGMP snooping table without receiving a router report. If a report is not received, the entry is deleted. The range is 10 to 214,748,364 seconds (6.8 years). The default setting is 260 seconds.
host timeout—The maximum time, in seconds, that a group snooping entry can remain in the IGMP snooping table without receiving a group report. If a report is not received, the entry is deleted. The range is 10 to 214,748,364 seconds. The default setting is 260 seconds.
Note
The host_timeout value should be less than or equal to the query timeout value, which is defined by the following: (query_interval x robustness) + query_response_interval.

IGMP snooping expects at least one device on every VLAN to periodically generate IGMP query messages. Without an IGMP querier, the switch eventually stops forwarding IP multicast packets to any port, because the IGMP snooping entries time out, based on the value specified in host_timeout or router_timeout.

Example

The following example configures the IGMP snooping timers:

configure igmp snooping timer 600 600

History

This command was first available in ExtremeXOS 10.1.

Platform Availability

This command is available on platforms that support the appropriate license. For complete information about software licensing, including how to obtain and upgrade your license and which licenses support the IGMP snooping feature, see the Switch Engine 32.2 Feature License Requirements document.