l2 binding vlan

Function

The l2 binding vlan command associates a specified VLAN with a BD.

The undo l2 binding vlan command restores the default settings.

By default, a VLAN is not associated with a BD.

Format

l2 binding vlan vlan-id

undo l2 binding vlan vlan-id

Parameters

Parameter	Description	Value
vlan-id	Specifies a VLAN ID.	The value is an integer that ranges from 1 to 4094. Currently, VLAN 1 cannot be associated with a BD.

Parameter

Description

Value

vlan-id

Specifies a VLAN ID.

The value is an integer that ranges from 1 to 4094.

Currently, VLAN 1 cannot be associated with a BD.

Views

BD view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

VXLAN needs to be deployed on a downlink interface to provide access services and an uplink interface to establish a VXLAN tunnel.

On the access side, two methods are available for creating a large Layer 2 BD.

Based on VLAN: You can associate one or multiple VLANs with a BD to add users in these VLANs to the BD. This VLAN-based mode implements larger-granularity control, but is easy to configure. It applies to VXLAN deployment on a live network.
Based on encapsulation mode: The device sends packets of different encapsulation modes to different Layer 2 sub-interfaces based on the VLAN tags contained in the packets. You can bind a Layer 2 sub-interface to a BD to add specified users to the BD. This mode implements refined and flexible control but requires more complex configuration. It applies to VXLAN deployment on a new network.

After you run this command to associate specified VLANs with a BD, different VLANs associated with the same BD form a large Layer 2 network. Users belong to these VLANs can communicate at Layer 2 through VXLAN tunnels.

Prerequisites

The VLAN to be bound to the BD has been created using the vlan command.

Precautions

One VLAN can be associated with only one BD, but one BD can be associated with multiple VLANs.
After a global VLAN is associated with a BD, you need to add corresponding interfaces to the VLAN.
If a VLAN is configured as a voice VLAN on the S6720-EI and S6720S-EI, the VLAN cannot be associated with a BD.
In NAC authentication scenarios, if there are online users in a VLAN, running the undo l2 binding vlan command to unbind the VLAN from a BD makes the users go offline.
If a VLAN is an ISP VLAN authorized to users and users exist in the VLAN on the device, the VLAN cannot be associated with a BD.
If a VLAN is used as the management VLAN of a Fit AP, it is not recommended that the VLAN be associated with a BD.

Example

# Associate VLAN 10 with BD 10.

<HUAWEI> system-view
[HUAWEI] vlan 10
[HUAWEI-vlan10] quit
[HUAWEI] bridge-domain 10 
[HUAWEI-bd10] l2 binding vlan 10