send-router-alert (MLD view)

Function

The send-router-alert command configures the switch to send MLD messages containing the Router-Alert option in IPv6 headers.

The undo send-router-alert command disables the switch from sending MLD messages containing the Router-Alert option in IPv6 headers.

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

Format

send-router-alert

undo send-router-alert

Parameters

None

Views

MLD view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

By default, the MLD messages sent by the switch contain the Router-Alert option in their IPv6 headers. If the switch needs to communicate with a device that does not support the Router-Alert option, run the undo send-router-alert command to configure the switch to send MLD messages without the Router-Alert option. The send-router-alert command is usually used together with the require-router-alert (MLD view) command.

Prerequisites

Layer 3 IPv6 multicast has been enabled using the multicast ipv6 routing-enable command in the system view.

Precautions

The function of this command is the same as that of the mld send-router-alert command used in the interface view. The configuration in the MLD view is globally valid, whereas the configuration in the interface view takes effect only for the specified interface. The configuration in the interface view takes precedence over the configuration in the MLD view. The configuration in the MLD view is used only when no configuration is performed in the interface view.

Example

# In the MLD view, configure the switch to send MLD packets with the Router-Alert option in IPv6 headers.

<HUAWEI> system-view
[HUAWEI] multicast ipv6 routing-enable
[HUAWEI] mld
[HUAWEI-mld] send-router-alert