igmp send-router-alert

Function

The igmp send-router-alert command specifies that the IGMP message sent on the interface contain the Router-Alert in its IP packet header.

The undo igmp send-router-alert command specifies that the IGMP message sent on the interface does not contain the Router-Alert in its IP packet header.

Format

igmp send-router-alert

undo igmp send-router-alert

Parameters

None

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

By default, the IGMP message sent on the interface contains the Router-Alert in its IP packet header.

The command is often used together with the igmp require-router-alert command.

The function of this command is the same as that of the send-router-alert command used in the IGMP view, except for the function range. The configuration in the IGMP view is globally valid in the instance, whereas the configuration in the interface view is valid only for the current interface. The system prefers the configuration in the system view. The configuration in the IGMP view is used only when the configuration in the interface view is not done.

You must run the multicast routing-enable command to enable the multicast function before using the command.

Example

# Set that the IGMP message sent on GigabitEthernet 0/0/1 does not contain the Router-Alert in its IP packet header.

<sysname> system-view
[sysname] multicast routing-enable
[sysname] interface GigabitEthernet 0/0/1
[sysname-GigabitEthernet0/0/1] undo igmp send-router-alert