The pbb backbone-source-mac command configures a B-MAC address for an interface.
The undo pbb backbone-source-mac command deletes a B-MAC address for an interface.
By default, no B-MAC address is configured for an interface.
| Parameter | Description | Value |
|---|---|---|
| mac-address | Specifies a B-MAC 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 MAC address cannot be 0000-0000-0000. |
100ge sub-interface view, 100GE interface view, 10GE sub-interface view, 10GE interface view, 200GE sub-interface view, 25GE sub-interface view, 25GE interface view, 400GE sub-interface view, 400GE interface view, 40GE sub-interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk sub-interface view, Eth-Trunk interface view, GE optical interface view, GE sub-interface view, GE interface view, GE electrical interface view, Global VE sub-interface view, PW-VE sub-interface view, VE sub-interface view
Usage Scenario
PBB-EVPN uses the MAC-in-MAC technique to forward user packets over an EVPN. Specifically, PBB-EVPN adds backbone MAC (B-MAC) addresses before customer MAC (C-MAC) addresses in user packets and enables PEs to transmit these user packets based only on these B-MAC addresses. PEs' control planes have to learn only the B-MAC addresses of other PEs.
B-MAC addresses configured in these views must be different. PBB preferentially uses the B-MAC addresses configured in the interface view for packet encapsulation. If no B-MAC addresses are configured in the interface view, PBB uses B-MAC addresses configured in the I-EVPN instance view instead. If no B-MAC addresses are configured in the I-EVPN instance view either, PBB uses B-MAC addresses configured in the B-EVPN instance view.Precautions
Only an interface bound to an I-EVPN instance can have a B-MAC address configured.
B-MAC addresses cannot be configured on the member interfaces of an Eth-Trunk interface bound to an I-EVPN instance. In addition, an interface with a B-MAC address configured cannot join an Eth-Trunk interface bound to an I-EVPN instance. If a CE is dual-homed to PEs, the PE interfaces that connect to the same CE must have the same ESI and B-MAC address configured.<HUAWEI> system-view [~HUAWEI] evpn vpn-instance ievpn i-evpn [~HUAWEI-i-evpn-instance-ievpn] q [~HUAWEI] interface Eth-Trunk1 [~HUAWEI-Eth-Trunk1] evpn b vpn-instance ievpn Warning: EVPN ALL-Active does not take effect because the E-Trunk is not bound to an Eth-Trunk interface. [*HUAWEI-Eth-Trunk1] pbb backbone-source-mac 00e0-fc12-3456