Look at the options in the " show bridge address-table" command.  I think " show bridge address-table address xx-xx-xx-xx-xx-xx" will be what you need.
can someone please tell me how to track down a mac address on a 3424 p/c. i have a machine that i know its ip and its mac but not sure where in cli that i go about finding out what port its located on. thanks 
tracing mac address to port