Discover IP address from MAC address

dboese13 · 07-08-2009, 10:46 AM

I have a piece of equipment I need to access. Someone else has been using the equipment and I do not have the IP address to access the device. No manuals are available.

A few years ago I found a way to discover an IP address with only the MAC address, but I am unable to find the solution again.

It was simple command line.

Any ideas would be helpful.

repo · 07-08-2009, 10:52 AM

Hi,

Welcome to LQ

First do a nmap to all the ip's in your network

Code:

nmap 10.0.0./24

then do a

Code:

arp -a

and look for the mac

pljvaldez · 07-08-2009, 10:57 AM

Not used it before, but a quick google seems to turn up arp and rarp. Here's a link, though it's not clear if he's running these commands from a switch or just any machine on the network.