bridge-domain (Layer 2 sub-interface view)

Function

The bridge-domain command associates a Layer 2 sub-interface with a BD.

The undo bridge-domain command restores the default settings.

By default, no Layer 2 sub-interface is associated with a BD.

Format

bridge-domain bd-id

undo bridge-domain [ bd-id ]

Parameters

Parameter	Description	Value
bd-id	Specifies the ID of the BD that is associated with a Layer 2 sub-interface.	The value is an integer that ranges from 1 to 16777215.

Views

Layer 2 sub-interface 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.

To create a BD based on encapsulation mode, create a Layer 2 sub-interface first. Then run the encapsulation (Layer 2 sub-interface view) command to configure a supported encapsulation mode on the sub-interface. After you run the bridge-domain (Layer 2 sub-interface view) command to associate a Layer 2 sub-interface with a BD, packets containing the same VLAN tag from different LANs can communicate at Layer 2.

Prerequisites

Run the command bridge-domain to create the BD.
Run the command interface to create the Layer 2 VXLAN sub-interface.

Precautions

One Layer 2 sub-interface can be associated with only one BD.

For the BD that bind to the Layer 2 sub-interfaces which use dot1q encapsulation, the VBDIF interface of this BD cannot be created on the device.

Example

# Associate Layer 2 sub-interface GE0/0/1.1 with BD 10.

<HUAWEI> system-view
[HUAWEI] bridge-domain 10
[HUAWEI-bd10] quit
[HUAWEI] interface GigabitEthernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] port link-type hybrid
[HUAWEI-GigabitEthernet0/0/1] quit
[HUAWEI] interface gigabitethernet 0/0/1.1 mode l2
[HUAWEI-GigabitEthernet0/0/1.1] bridge-domain 10