G400-D MAC Address

I am using BuiltIn Ethernet on G400-D with netmf.
When i read physical address, I saw it’s different from the MAC-Address lable on the chip.
Why is this different? And is the physical address on BuiltIn Ethernet really a unique MAC-address?

The MAC address you see the default one built in the firmware. It must be updated.

The MAC on the label is a unique one we provide for convenience.