I agree with the previous poster. If you know the router acting as the gateway for the IP, start there and go step by step. It sounds like a hassle, but I can assure you that usually users are usually no more than a few layer 2 hops away from their gateway router. Shouldn't take more than a minute to pinpoint an exact switchport given the MAC (or IP). I do this all the time, and it's a piece of cake.
Mike W. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38604&t=38560 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

