Yeah, that joke gets used a lot in testing hardware ¨C it may have just not had the correct MAC programmed in. Not the first time. As long as you don¡¯t have another DEAD BEEF 1234 on the same network it shouldn¡¯t cause any real issues on
its own. On the other hand check to make sure everything else is working as expected as there is a small chance that this could be a sign of an impending failure.