computer/network knowledgibles

[Dave20046]

:-k Got a bit of a problem wondering if anyone can give me a hand.
I need to find the IP address of a device on my network, the **** that was here before me messed with my switch and didn't record the details. All I have is the physical box, it's mac address and it's serial number. I can't nuke it as the only way to do so is with a command line through a console cable which apparently no one in sheffield knows what it is.

Any ideas?

[Kinvig]

cmd -> ipconfig?

[ophic]

ping the whole network, then run arp -a and look for the mac address.

[Dave20046]

ping the whole network, then run arp -a and look for the mac address.
Would that have the same result as scouring my dhcp pool for the mac address?

worth a pop anyway cheers ophic :)

[Dave20046]

cmd -> ipconfig?
Nice try but switches don't have keyboards and monitors unfortunately :mad:
Cheers anyway kinvig

[timwilky]

Would that have the same result as scouring my dhcp pool for the mac address?

worth a pop anyway cheers ophic :)


Not really, I would never put static devices on dhcp, unless with a reserved address.

[ophic]

Would that have the same result as scouring my dhcp pool for the mac address?

worth a pop anyway cheers ophic :)
Not quite - my method would work regardless of whether it uses dhcp or not :cool:

[Dave20046]

Not really, I would never put static devices on dhcp, unless with a reserved address.
We've had a new server meaning the reservation for the switch has gone, and there is no record of it's ip address (unless it is getting it from dhcp) so I want to find the IP to give it a reservation and hopefully it'll start behaving.

[Dave20046]

Not quite - my method would work regardless of whether it uses dhcp or not :cool:
cool ta, just doing a scan now :thumright:

[jamesw1024]

Switches normally have a console port, can you not login directly to the switch via that and find the IP address?

[Sudoxe]

Download (http://http://nmap.org/download.html) NMAP for windows and run a scan on your subnet, i.e
if your network is 192.168.0.0 - 255 with a netmask of 255.255.255.0 scan 192.168.0.0/24

That will tell you everything on the network, and open ports.

Dan

[Dave20046]

cool ta, just doing a scan now :thumright:
hmm results are back - there's a couple of IP's showing as live but the hostname is 'n/a' thinking one of these two might be me switch :cool:

[ophic]

only other suggestion is that most switches have a "default" setting - some default to dhcp, others to a particular IP address that you have to look up in the manual.

If you can find this information and a way of resetting the switch to its default presets.... you're in business.

[Dave20046]

only other suggestion is that most switches have a "default" setting - some default to dhcp, others to a particular IP address that you have to look up in the manual.

If you can find this information and a way of resetting the switch to its default presets.... you're in business.
Only way to reset to defaults is to run a commandline via a cable that's impossible to source locally. (If I can't get this done today I'll have to order one of the web)
There's a html type admin panel if you type the ip into your borswer (like a domestic router) but for some reason this isn't showing if I type it into my client machine ...hmm...might try that locally. Pretty sure I have the address now.

[Dave20046]

Download (http://http://nmap.org/download.html) NMAP for windows and run a scan on your subnet, i.e
if your network is 192.168.0.0 - 255 with a netmask of 255.255.255.0 scan 192.168.0.0/24

That will tell you everything on the network, and open ports.

Dan
cheers dan, got my answer with angry ip scanner but downloaded that too for future use :thumbsup:

[Dave20046]

Bingo! Proxy exception added,discovered IP typed and I have a control panel!

Now to guess the password :(

Anmyway with that knowledge I've added it a reservation now so I'll wait and see if that stops the weird connection drops clients have been getting. Fingers crossed.
Thanks everyone - I'll update as applicable if you're interested.