mld-snooping send-router-alert

Function

The mld-snooping send-router-alert command configures the switch to send MLD messages with the Router-Alert option in the IPv6 header to a VLAN.

The undo mld-snooping send-router-alert command configures the switch to send MLD messages without the Router-Alert option to a VLAN.

By default, the MLD messages sent by the switch contain the Router-Alert option.

Format

mld-snooping send-router-alert

undo mld-snooping send-router-alert

Parameters

None

Views

VLAN view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The Router-Alert option identifies the protocol messages that need to be processed by upper-layer routing protocols.

By default, the switch sends MLD messages with the Router-Alert option. If some devices in the same VLAN as the switch can process only the MLD messages without the Router-Alert option, use the undo igmp-snooping send-router-alert command to configure the switch to send MLD messages without the Router-Alert option.

The switch adds the Router-Alert option only to locally originated MLD messages and does not add this option to MLD messages received from other devices.

Prerequisites

MLD snooping has been enabled globally using the mld-snooping enable command.

Precautions

The configuration takes effect only after you run the mld-snooping_enable command to enable MLD snooping in the VLAN.

Example

# Configure the switch to send MLD messages that do not contain the Router-Alert option in the IPv6 header to VLAN 3.

<HUAWEI> system-view
[HUAWEI] mld-snooping enable
[HUAWEI] vlan 3
[HUAWEI-vlan3] mld-snooping enable
[HUAWEI-vlan3] undo mld-snooping send-router-alert