mld-snooping querier enable (VSI view)

Function

The mld-snooping querier enable command enables the querier function for a VLAN/VSI.

The undo mld-snooping querier enable disables the querier function for a VLAN/VSI.

By default, the querier is disabled for a VLAN/VSI.

Format

mld-snooping querier enable

undo mld-snooping querier enable

Parameters

None

Views

VSI-AUTO view, VSI-BD view, VSI-DEFAULT view, VSI-STATIC view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2mc	write

Usage Guidelines

Usage Scenario

After the querier function is enabled using the mld-snooping querier enable command on a Layer 2 device, this device will send MLD Query messages, freeing its interworking upstream device from doing this. The Layer 2 device will then also create and maintain multicast forwarding entries to forward data at the link layer.

Before running the

mld-snooping querier enable command, note the following points:

Static multicast groups have been configured on the upstream device. Otherwise, user join messages cannot be sent to the upstream device, and multicast data flows cannot be sent to receivers.
If the links from a multicast source to user hosts are on the same Layer 2 network, the querier function can be enabled on a Layer 2 device. This does not affect the normal receiving of multicast data packets.

Precautions

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

The VLAN is bound to a VSI.
IPv6 PIM is enabled for Layer 3 VLANIF interfaces of the VLAN.
The proxy function is enabled for the VLAN using the mld-snooping proxy command.
The
mld-snooping querier enable command fails to be run in a VSI view in any of the following conditions:
The VSI is bound to a BD.
The proxy function is enabled for the VSI using the mld snooping proxy command.

Example

# Enable the querier function for VLAN 10.

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

# Enable the querier function for 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-vsi-vsi0] mld-snooping querier enable