On Dec 14, 2007, at 3:21 PM, Les Mikesell wrote: > Jerry Geis wrote: >> I have a device on my network that is not DHCP and I dont know the >> IP address of it >> and it has not method of finding it or changing it unless you know >> the IP address (setable by browser). >> Is there a way on linux, based on MAC address, to get the IP of >> the unit? > > You accumulate a table of mac<->ip assocations, but only after > communicating with something. arp -a will show the current entries > (which expire fairly quickly). You might ping everything in the > network range, then look for the mac in the arp list. to ping every address, check out broadcast pings here http://www.macworld.com/article/53277/2006/10/pingfind.html (or google other how-to's) then do the arp -a but keep in mind not everything responds to broadcast pings. Brian