No one has yet mentioned logging into the switches. If I may suggest:
Pssst!
"..using the MAC table (CAM table in Cisco-speak) from the switch."
Our scars have the power to remind us that our past was real. -- Hannibal Lecter.
Talent is God given. Be humble. Fame is man-given. Be grateful. Conceit is self-given. Be careful. -- John Wooden
I do apologize. I should have read your whole post thehorse13 I read the beginning and the end, but I missed the part about the switch. I will try not to let it happen again, but I can make no promises.
I hope my post did still help somewhat with the procedure involved. Either way, I think he has some good advice for how to clean up his network.
"Experience is the hardest teacher, it gives the test first and the lesson after." Anonymous