mld-snooping proxy

Function

The mld-snooping proxy command enables MLD snooping proxy in a VLAN/VSI.

The undo mld-snooping proxy command disables MLD snooping proxy in a VLAN/VSI.

By default, MLD snooping proxy is disabled in a VLAN/VSI.

Format

mld-snooping proxy

undo mld-snooping proxy

Parameters

None

Views

VLAN view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2mc	write

Usage Guidelines

Usage Scenario

Forwarding entries are set up based on MLD messages exchanged between a Layer 3 device and user hosts. If there are many user hosts, redundant MLD messages increase the workload of the Layer 3 device.

MLD snooping proxy can address this problem. MLD snooping proxy provides two functions: querier and unified message transmission, which should be both implemented on the Layer 3 device without MLD snooping proxy. With the querier function, a Layer 2 device can send MLD Query messages. With the unified message transmission function, a Layer 2 device can receive and terminate MLD Query messages sent from users, and then send them in a unified manner. To enable MLD snooping proxy, run the mld-snooping proxy command, which helps reduce the burden of the Layer 3 device and saves bandwidth resources on the Layer 2 and Layer 3 devices.

Configuration Impact

After MLD snooping proxy is enabled on a device, users' Report messages will be terminated on the device and cannot be sent to upstream devices.

Precautions

The

mld-snooping proxy command fails to be run in a VLAN view in any of the following conditions:

The VLAN is bound to a VSI.
The querier function is enabled in the VLAN.
IPv6 PIM is enabled on Layer 3 VLANIF interface of the VLAN.
Report message suppression is enabled in the VLAN using the mld-snooping report-suppress command.
The
mld-snooping proxy command fails to be run in a VSI view in any of the following conditions:
The VSI is bound to a BD.
The querier function is enabled in the VSI.
Report message suppression is enabled in the VSI using the mld-snooping report-suppress command.

Example

# Enable MLD snooping proxy in VSI vsi0.

<HUAWEI> system-view
[~HUAWEI] mld-snooping enable
[*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-vsi0] mld-snooping proxy

# Enable MLD snooping proxy in VLAN 10.

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