Networking Misc.

Interesting networking tricks and tips. This one is useful if you have Cisco switches configured with CDP (Cisco Discovery Protocol).

You can issue the following tcpdump command on a host connected to a Cisco Switch:
tcpdump -n -i eth-s1/s1p1 -s 1500 -w - -c 1 ether dst 1:0:c:cc:cc:cc and greater 60|strings -a

This will produce output which will tell you the switch type and port the device is plugged into.