find what switch a server is conected to

[fzx5v0]

Hi

is there anyway to find out what switch a windows server is conected to with out sending someone to phisically to look

tracert only shoows router I need to find the switches

Thanks

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[lerdalt]

How I usually end up tracking devices down is if I have the IP address, I go to the routers and do a "show arp | include xxx.xxx.xxx" where xxx.xxx.xxx is the ip address. This then gives the MAC address of the device.

Then the hard part is connecting to each switch and doing a "show mac-address-table | inc xxxx.xxxx.xxxx.xxxx" where the xxxx.xxxx.xxxx.xxxx is the mac address. Just repeat on each switch until you find the one where it is not connected to an uplink/trunk port.

 

[fzx5v0]

thanks for that it will be cheaper to send someone as there is about 100 switches

thanks

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[lerdalt]

you might be surprised...if all your switches connect back to a single point, then you will narrow it down pretty quickly. I use it all the time and my primary campus has about 100 switches. I can usually find a device in about 5-10 minutes or less

 

[burtsbees]

Also, though this is only a secondary methed, this command
router#sh cdp nei det
will work on Cisco devices with cdp enabled (enabled by default). Usually, however, it is wise to disable cdp on edge routers.

Burt

 

[whykap]

cdp will not work finding a windows server.

fzx if you think going on site and tracing every cable on every switch will be faster than what lerdalt suggested more power to you.

i guarantee I can do the same in a third of the time or less and I'll never have to leave my office.

 

[burtsbees]

I know CDP will not find the server---neither will sh arp or sh mac-add-tab..."tracert only shoows router I need to find the switches"---this is what I was talking about. But thanks for the info...

Burt

 

[jdeisenm]

Usually the last 4 of the mac address is unique on a network.
That way you only have to type.

"sh mac- | inc cccc" where the mac address is aaaa.bbbb.cccc

If the device is a windows computer, you the verify the mac address with "nbtstat -a 111.222.111.222" (where 111.222.111.222 is the ip address).