igmp-snooping learning vlan

Function

The igmp-snooping learning vlan command enables an interface to dynamically learn forwarding entries of VLAN.

The undo igmp-snooping learning vlan command disables an interface from dynamically learning forwarding entries of VLAN.

By default, an interface is enabled to dynamically learn forwarding entries.

Format

igmp-snooping learning vlan { { vlan-id1 [ to vlan-id2 ] } &<1-10> | all }

undo igmp-snooping learning vlan { { vlan-id1 [ to vlan-id2 ] } &<1-10> | all }

Parameters

Parameter	Description	Value
vlan-id1	Specifies a start VLAN ID.	The value is an integer ranging from 1 to 4094.
to vlan-id2	Specifies an end VLAN ID. If you do not specify to vlan-id2 interfaces are added only to the VLAN specified by vlan-id1.	The value is an integer ranging from 1 to 4094. vlan-id2 must be greater than or equal to vlan-id1. vlan-id2 and vlan-id1 specify a VLAN ID range.
all	Indicates that dynamic forwarding entry learning is enabled in all the VLANs to which a specific interface belongs.	-

Parameter

Description

Value

vlan-id1

Specifies a start VLAN ID.

The value is an integer ranging from 1 to 4094.

to vlan-id2

Specifies an end VLAN ID. If you do not specify to vlan-id2 interfaces are added only to the VLAN specified by vlan-id1.

The value is an integer ranging from 1 to 4094. vlan-id2 must be greater than or equal to vlan-id1. vlan-id2 and vlan-id1 specify a VLAN ID range.

all

Indicates that dynamic forwarding entry learning is enabled in all the VLANs to which a specific interface belongs.

Views

Layer 2 100GE interface view, Layer 2 10GE interface view, 25GE-L2 view, 400GE-L2 view, Layer 2 40GE interface view, Layer 2 50GE interface view, Eth-Trunk interface view, Layer 2 GE interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2mc	write

Usage Guidelines

Usage Scenario

After you run the igmp-snooping learning vlan command to enable an interface dynamically to learn forwarding entries, the interface can both be added to a multicast group statically and learn forwarding entries dynamically based on received IGMP Report messages. After the interface is disabled from dynamically learning forwarding entries, you can only add the interface to a multicast group statically.If the igmp-snooping learning vlan command is run more than once, all configurations take effect.

Example

# Disable GE 0/1/0 that belongs to VLANs 3 and 4 from dynamically learning forwarding entries.

<HUAWEI> system-view
[~HUAWEI] igmp-snooping enable
[*HUAWEI] vlan 3
[*HUAWEI-vlan3] igmp-snooping enable
[*HUAWEI-vlan3] quit
[*HUAWEI] vlan 4
[*HUAWEI-vlan4] igmp-snooping enable
[*HUAWEI-vlan4] quit
[*HUAWEI] interface GigabitEthernet 0/1/0
[*HUAWEI-GigabitEthernet0/1/0] portswitch
[*HUAWEI-GigabitEthernet0/1/0] port link-type trunk
[*HUAWEI-GigabitEthernet0/1/0] port trunk allow-pass vlan 3 to 4
[*HUAWEI] undo igmp-snooping learning vlan 3 to 4