Determine Port a Server is connected to

mike, using the IP address you need to find associated mac address. The easiest way to do this is to go to the router connected to the switchand show arp to see the ip addresses and mac addresses. This will tell you the mac address you need. Then go to the switch and show mac address table and see what port the mac address is on. This will show you which port the server with the designated ip address is connected to.

Thanks, there is NO router involved. This is a Administrative net that does not attach to the outside world.

Is there a Show ARP command on the switch itself?

Can you tell when a new port is connected? A log of some sort?

Mike

If the management IP address of the switch is on the same subnet as the Sun server -- then yes, you can use the arp table of the switch to help you.

If you can login to the Sun box, you can run snoop to decode the CDP frames the switch sends -- it's a neat trick that will give you the switch and port (and many other things):

solaris$ snoop -d qfe0 -x0 01:00:0c:cc:cc:cc

Or, other boxes may have tcpdump:

linux$ tcpdump -i eth0 ether host 01:00:0c:cc:cc:cc

CatOS or IOS?

reboot the server and see which port goes down:-)) Check the logs as the interface will flap. The arp and mac address is the best way of course but brute force works too.

Get the MAC address, then

If it's CatOS, try sh cam dyn ? If it's IOS, try sh mac ?