Can the MAC address of the BVI interface in a network bridge be changed

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Yes, you can change the media access control (MAC) address of a Bridged Virtual Interface (BVI).

Other related questions:
Can the MAC address of the bridged virtual interface of a bridge on an AR router be modified

The MAC address of the bridged virtual interface (BVI) of a bridge on an AR router can be modified.
You can run the mac-address command in the Bridge-if interface view to modify the MAC address of the current bridged virtual interface.
The MAC address of a bridged virtual interface is the system MAC address, which may conflict with the MAC addresses of other interfaces or virtual interfaces. If the MAC address of a bridged virtual interface conflicts with the MAC addresses of member interfaces of the bridge group, the bridged virtual interface cannot transmit traffic in Layer 3.
When configuring a bridged virtual interface, confirm whether the MAC address of the interface conflicts with the MAC addresses of the member interfaces of the bridge group. If the MAC addresses conflict, you can run the mac-address command to modify the MAC address of the Bridge-if interface.
After the MAC address of the bridged virtual interface is modified, the device proactively sends a free ARP to update the ARP entries on the peer device.

What are the differences between network bridge MAC addresses and common MAC addresses
The two types of MAC addresses have the same functions. Packets bridged by network bridges are complete Ethernet Layer 2 packets.

How do I change the MAC address of an AR
To change the MAC address of an AR, use the following method. Run the set system-mac command in the diagnostic view. For example, # Change the default MAC address to 00e0-0987-7890. [Huawei] diagnose [Huawei-diagnose] set system-mac default 00e0-0987-7890 Info: The public mac-address set pass. Note: A MAC address is globally unique. Do not change the MAC address of an AR in normal situations. When configuring a MAC address, note the following points: - The MAC address cannot be all 0s or all 1s. - The multicast MAC address cannot be configured. - If a device supports multiple MAC addresses, the last four bits of the MAC address must be all 0s.

What are the differences between the MAC address of a bridge on an AR router and a normal MAC address
The MAC address of a bridge on an AR router equals to a normal MAC address. A bridge bridges complete Layer-2 Ethernet packets.

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