Find the IP address of a computer with know MAC address (ethernet ID)

So, on my server it is reporting an issue with a computer with MAC address AA:BB:CC:DD:EE:FF (obviously I made this one up).

Trouble is, I know this computers MAC address but not it's IP address. So how do you find it?

Well, found this forum and this forum which basically tells you to use the command 'arp':

arp -a | grep "AA:BB:CC:DD:EE:FF "

arp lists all MAC address of computers on your subnet. But it's taking a long time. Reading more in the forum it looks like it works by pinging all the IP addresses, then asking it for it's MAC address. Long winded!

Xserver OS X 10.4.11 no ping

We've been having this problem where the server doesn't return a ping for some time. The work around is to simply unplug the network cable and plug it back in. I have noticed on two occasions (I didn't check the other occasions) that in the system log:


Jan 27 14:38:44 Xserve servermgrd: servermgr_dns: no name available via DNS for 172.25.1.81
Jan 27 14:38:44 Xserve servermgrd: servermgr_dns: no reverse DNS entry for server, various services may not function properly
Jan 27 14:38:44 Xserve servermgrd: servermgr_dns: gethostname() doesn't match the configured name - use changeip to repair

It might be worth running this "changeip"