On the router you can do a 'sh mac-addr-table addr xxxx-xxxx-xxxx(mac addr) and it will show you the interface that the Mac-addr is on.
On switches you can do a 'show cam xx-xx-xx-xx-xx-xx and it should give you the port on the switch where the mac-addr is.. This works on our 6500 switches with msfc routing and supervisor cards.. Larry Letterman Cisco Systems [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Jeffrey Reed Sent: Saturday, March 16, 2002 2:15 PM To: [EMAIL PROTECTED] Subject: Finding a MAC address [7:38560] What utilities are you guys using to find MAC addresses across a large campus network? If I have an end users IP address, check the routers ARP for their MAC, whats the easiest way to find out which switch port? Thanks!! Jeff Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38564&t=38560 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
