Jesse,
"We have found four ports, all with HP printers behind them, that
are giving us the occasional gibberish MAC address."
Can you try to update the firmware on the JetDirect cards?
I have a few JetDirect cards to fool around with at home. Could you share the
model and firmware version?
Thanks,
Lou Goddard
PS - I've seen similar things happen before. I had a misbehaving device
generating junk frames with multicast MAC addresses before. I've also
seen older Windows machines pad out packets with the contents of their
memory instead of zeros. Great catch Ernie!
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