Wireless Networks Thread, How to find switch ip? in Technical; Ive got a 2nd hand switch recently, and i need to find its ip, is there any way to find ...
28th May 2008, 03:43 PM #1
How to find switch ip?
Ive got a 2nd hand switch recently, and i need to find its ip, is there any way to find the switches ip by talking to its mac address some how to find the ip cause thats all ive got. The switch did have a ip set before but i dont know what it is. I also dont have a null modem cable that i can use to connect it via serial. Its a 3com Superstack II 3900
28th May 2008, 03:50 PM #2
Check your DHCP on the off chance it is set to obtain IP address automatically.
28th May 2008, 03:58 PM #3
Nope nothing in DHCP for it
28th May 2008, 04:11 PM #4
Loads of info about how to reset one of these switches here: 3Com: Switches - Password Recovery for all 3COM superstack switches but you do need a null modem lead
28th May 2008, 04:12 PM #5
The leads are not expensive just take a look on eBay.
28th May 2008, 04:43 PM #6
Plug it into a machine running wireshark and power cycle it and look for arp stuff. It's cheap and might just work
28th May 2008, 04:44 PM #7
Good idea. or you could use the 3com network utility, for the life of me I can't remember the name of it.
28th May 2008, 04:48 PM #8
I suspect this will only work if your on the same ip range / subnet as the switch. You could try some common ones I suppose....
Originally Posted by FN-Greatermanchester
28th May 2008, 05:29 PM #9
I'll buy a cable if i cant get the ip some other way, is there no programs that will let me input the mac and it will find out the ip some way
28th May 2008, 05:31 PM #10
You can assign an ip address to a MAC address using the ARP command. The console port is usually the best be though.
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