multicast-vlan igmp-querier-election user-vlan

Function

The multicast-vlan igmp-querier-election user-vlan command enables the querier election for user VLANs.

The undo multicast-vlan igmp-querier-election user-vlan command disables the querier election for user VLANs.

By default, the querier election is disabled.

Format

multicast-vlan igmp-querier-election user-vlan { { vlan-id1 [ to vlan-id2 ] } &<1-10> }

undo multicast-vlan igmp-querier-election user-vlan { all | { vlan-id1 [ to vlan-id2 ] } &<1-10> }

Parameters

Parameter	Description	Value
vlan-id1	Specifies the ID of the first user VLAN.	The value is an integer ranging from 1 to 4094.
to vlan-id2	Specifies the ID of the last user VLAN. The vlan-id2 value must be greater than the vlan-id1 value. vlan-id2 and vlan-id1 define a range together. If vlan-id2 is not specified, only the VLAN specified by vlan-id1 serves as the user VLAN.	The value is an integer ranging from 1 to 4094. The vlan-id2 value must be greater than the vlan-id1 value.
all	Indicates all user VLANs.	-

Parameter

Description

Value

vlan-id1

Specifies the ID of the first user VLAN.

The value is an integer ranging from 1 to 4094.

to vlan-id2

Specifies the ID of the last user VLAN.

The vlan-id2 value must be greater than the vlan-id1 value. vlan-id2 and vlan-id1 define a range together. If vlan-id2 is not specified, only the VLAN specified by vlan-id1 serves as the user VLAN.

The value is an integer ranging from 1 to 4094. The vlan-id2 value must be greater than the vlan-id1 value.

all

Indicates all user VLANs.

Views

VLAN view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2mc	write

Usage Guidelines

Usage Scenario

If the multicast VLAN function is configured on two Routers connected to the same user VLAN, the users in the user VLAN will receive two copies of identical multicast data. To resolve this issue, run the multicast-vlan igmp-querier-election user-vlan command to enable the querier election function for user VLANs. With this function enabled, a Router that does not win a querier election will delete forwarding entries and will not create forwarding entries after receiving Report messages from user VLANs. As a result, the Router will not send multicast data to the user VLAN.

Prerequisites

The igmp-snooping send-query source-address command has been run on each Router to set a source IP address contained in Query messages sent by a querier.

Configuration Impact

If the multicast-vlan igmp-querier-election user-vlan command is run more than once, all configurations take effect.

Example

# Enable the querier election of user VLAN 100.

<HUAWEI> system-view
[~HUAWEI] vlan 200
[*HUAWEI-vlan200] quit
[*HUAWEI] igmp-snooping enable
[*HUAWEI] vlan 100
[*HUAWEI] quit
[*HUAWEI] vlan 10
[*HUAWEI-vlan10] igmp-snooping enable
[*HUAWEI-vlan10] multicast-vlan enable
[*HUAWEI-vlan10] multicast-vlan user-vlan 100
[*HUAWEI-vlan10] multicast-vlan igmp-querier-election user-vlan 100