sfx2000
Part of the Furniture
well - because the IEEE OUI assignments are based on the honor system - there's no regulatory enforcement here...
It only takes a couple of keystrokes for a factory in Shenzen to program a MAC address header into the factory line, and build stuff... I usually see things like this on cheap Android TV boxes and IP cameras from China - not calling them out directly, just stating what is...
going back to OP's concerns - it could be a fake switch, or it could be someone re-wrote the MAC addr of the switch itself, this is possible.
