igmp-snooping router-aging-time

Function

The igmp-snooping router-aging-time command sets the aging time of dynamic router ports in a VSI.

The undo igmp-snooping router-aging-time command restores the default aging time of dynamic router ports in a VSI.

By default, the aging time of dynamic router ports in a VSI is 180 seconds.

Format

igmp-snooping router-aging-time router-aging-time

undo igmp-snooping router-aging-time

Parameters

Parameter	Description	Value
router-aging-time	Specifies the aging time of dynamic router ports in a VSI.	The value is an integer that ranges from 1 to 1000, in seconds. The default value is 180 seconds.

Views

VSI view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When a short-term congestion occurs on the network, it takes a longer time to transmit Query messages from the IGMP querier to the switch. If a router port on the switch ages in this period, the switch does not send Report or Leave messages to the router port. As a result, multicast data forwarding may be interrupted. Therefore, set a long aging time for router ports if the network is unstable.

Prerequisites

IGMP snooping has been enabled for VPLS using the igmp-snooping over-vpls enable command in the system view.

Configuration Impact

If a router port receives an IGMP Query message, the switch sets the remaining aging time of the router port to the configured value.

Precautions

The configuration takes effect only when IGMP snooping is enabled in the VSI using the igmp-snooping enable (VSI view) command.

A too short aging time causes frequent aging of router ports and degrades system performance.

Example

# Set the aging time of router ports in VSI company1 to 500 seconds.

<HUAWEI> system-view
[HUAWEI] igmp-snooping enable
[HUAWEI] igmp-snooping over-vpls enable
[HUAWEI] vsi company1
[HUAWEI-vsi-company1] igmp-snooping enable
[HUAWEI-vsi-company1] igmp-snooping router-aging-time 500