igmp-snooping robust-count

Function

The igmp-snooping robust-count command sets the IGMP robustness variable in a VSI, which specifies the query count.

The undo igmp-snooping robust-count command restores the default IGMP robustness variable in a VSI.

By default, the robustness variable in a VSI is 2.

Format

igmp-snooping robust-count robust-count

undo igmp-snooping robust-count

Parameters

Parameter	Description	Value
robust-count	Specifies the IGMP robustness variable in a VSI.	The value is an integer that ranges from 2 to 5. The default value is 2.

Views

VSI view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The IGMP robustness variable is used to adjust the aging time of group member interfaces.

When a member port receives an IGMP Report message from a downstream host, the switch sets the aging time of the interface to: General query count x General query interval + Maximum response time for General Query messages. The igmp-snooping robust-count command sets the general query count. The general query interval is set by the igmp-snooping query-interval command, and the maximum response time for General Query messages is set by the igmp-snooping max-response-time command.
When the member port receives a Leave message from a downstream host, the switch starts the aging timer of the interface to: Last member query interval x Last member query count. The igmp-snooping robust-count command sets the general query count. The last member query interval is set by the igmp-snooping lastmember-queryinterval command.

Prerequisites

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

Precautions

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

Example

# Set the IGMP robustness variable to 5 in VSI company1.

<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 robust-count 5