pbb backbone-source-mac (VSI-BVSI view)

Function

The pbb backbone-source-mac command configures a B-SMAC address.

The undo pbb backbone-source-mac command deletes a B-SMAC address.

By default, no B-SMAC address is configured.

Format

pbb backbone-source-mac source-mac-address

undo pbb backbone-source-mac

undo pbb backbone-source-mac source-mac-address

Parameters

Parameter	Description	Value
source-mac-address	Specifies a B-SMAC address.	The value is a 12-digit hexadecimal number, in the format of H-H-H. Each H is 4 digits. If an H contains fewer than 4 digits, the left-most digits are padded with zeros. For example, e0 is displayed as 00e0. The value cannot be all 0s or all 1s (which is a broadcast address) and its eighth bit cannot be 1 (the address whose eighth bit is 1 is a multicast address). A B-SMAC address is a virtual MAC address. The B-SMAC address specified through source-mac-address must be the same as the B-DMAC address on the remote end.

Parameter

Description

Value

source-mac-address

Specifies a B-SMAC address.

The value is a 12-digit hexadecimal number, in the format of H-H-H. Each H is 4 digits. If an H contains fewer than 4 digits, the left-most digits are padded with zeros. For example, e0 is displayed as 00e0. The value cannot be all 0s or all 1s (which is a broadcast address) and its eighth bit cannot be 1 (the address whose eighth bit is 1 is a multicast address).

A B-SMAC address is a virtual MAC address.
The B-SMAC address specified through source-mac-address must be the same as the B-DMAC address on the remote end.

Views

VSI-BVSI view, VSI-IVSI-P2P view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2vpn	write

Usage Guidelines

Usage Scenario

After configuring the I-VSI and B-VSI, perform the following configurations for PBB VPLS to take effect:

Run the pbb service-type p2p command to configure a PBB VPLS service type for the I-VSI.
Run the pbb i-tag command to configure an I-tag for the I-VSI.
Run the pbb backbone-source-mac command to configure a B-SMAC address for the I-VSI.
Run the pbb backbone-destination-mac command to configure a B-DMAC address for the I-VSI or B-VSI.
In PBB VPLS, PEs perform PBB encapsulation on received user-side packets by adding a PBB header containing B-SMAC and B-DMAC addresses to these packets. SPEs on the backbone network need to learn only B-MAC addresses instead of all user MAC addresses. This implementation reduces the burden of MAC address learning on SPEs. To configure a B-SMAC address, run the pbb backbone-source-mac command.

Configuration Impact

If the pbb backbone-source-mac command is run more than once, the latest configuration overrides the previous one.

Precautions

The B-SMAC address must be unique on the entire network.
A B-SMAC address can be configured in either an I-VSI or a B-VSI. If an I-VSI and the B-VSI to which the I-VSI is bound have different B-SMAC addresses, the B-SMAC address configured in the I-VSI takes effect.
After an I-VSI is bound to a B-VSI, you must remove the binding before changing a B-SMAC address or running the undo pbb backbone-source-mac command.
In scenarios where multiple paths are established between two PEs and multiple I-VSIs are bound to a single B-VSI, at least one of B-SMAC addresses must be configured for an I-VSI to carry out load balancing. In addition, B-SMAC addresses configured in different I-VSIs must be different.

Example

# Configure a B-SMAC address of 00e0-fc00-0002 for a B-VSI.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] quit
[*HUAWEI] vsi vsi2
[*HUAWEI-vsi-vsi2] pwsignal ldp
[*HUAWEI-vsi-vsi2-ldp] vsi-id 2
[*HUAWEI-vsi-vsi2-ldp] quit
[*HUAWEI-vsi-vsi1] pbb b-vsi enable
[*HUAWEI-vsi-vsi1] pbb backbone-source-mac 00e0-fc00-0002

# Configure a B-SMAC address of 00e0-fc00-1234 for an I-VSI.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] quit
[*HUAWEI] vsi vsi1
[*HUAWEI-vsi-vsi1] pwsignal ldp
[*HUAWEI-vsi-vsi1-ldp] vsi-id 1
[*HUAWEI-vsi-vsi1-ldp] quit
[*HUAWEI-vsi-vsi1] pbb i-vsi enable
[*HUAWEI-vsi-vsi1] pbb backbone-source-mac 00e0-fc00-1234