[CentOS] find IP address of device on network based on MAC address
Brian
brian-list at comcast.net
Fri Dec 14 20:29:16 UTC 2007
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
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