mld-snooping router-learning

Function

The mld-snooping router-learning command disables router interfaces from dynamically learning forwarding entries.

The undo mld-snooping router-learning command enables router interfaces to dynamically learn forwarding entries.

By default, router interfaces are enabled to dynamically learn forwarding entries.

Format
Parameters
Views
Default Level
Task Name and Operations
Usage Guidelines
Example

Format

mld-snooping router-learning

undo mld-snooping router-learning

Parameters

None

Views

VLAN view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2mc	write

Usage Guidelines

Usage Scenario

On a device enabled with MLD snooping, interfaces that receive MLD general Query messages with source IP addresses other than 0::0 or Protocol Independent Multicast (PIM) Hello packets are considered as dynamic router interfaces. The device records all router interfaces in a list. Using this mechanism, the device is incapable of controlling data forwarding to users. To resolve this issue, run the undo mld-snooping router-learning command to disable router interfaces in a VLAN/VSI from dynamically learning forwarding entries.

Prerequisites

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

Configuration Impact

After the undo mld-snooping router-learning command is run, interfaces in the specified VLAN/VSI do not listen to MLD Query messages and static router interfaces must be configured.

Follow-up Procedure

Run the mld-snooping static-router-port command to configure static router interfaces.

Precautions

If multicast VLAN is enabled for a VLAN, do not run the undo mld-snooping router-learning command. Otherwise, the multicast VLAN function fails.

If a VLAN is bound to a VSI, enable MLD snooping in the VSI view.

The

undo mld-snooping router-learning command fails to be run in a VLAN in any of the following conditions:

The VLAN is bound to a VSI.
The
undo mld-snooping router-learning command fails to be run in a VSI in the following condition:
The VSI is bound to a BD.

Example

# Enable interfaces in VLAN 10 to dynamically learn forwarding entries.

<HUAWEI> system-view
[~HUAWEI] mld-snooping enable
[*HUAWEI] vlan 10
[*HUAWEI-vlan10] undo mld-snooping router-learning

# Enable interfaces in VSI vsi0 to dynamically learn forwarding entries.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] quit
[*HUAWEI] vsi vsi0
[*HUAWEI-vsi-vsi0] pwsignal ldp
[*HUAWEI-vsi-vsi0-ldp] vsi-id 1
[*HUAWEI-vsi-vsi0-ldp] quit
[*HUAWEI-vsi-vsi0] undo mld-snooping router-learning