Figuring out address of peer in DHCP environment

el chino cudeiro r.nevot at gmail.com
Fri Dec 21 17:31:51 UTC 2007


If these clients are in the same subnet, probably you can test something on
multicast dns or similar.
Take a look at http://en.wikipedia.org/wiki/Zeroconf to start your
investigations.
regards


On Dec 21, 2007 3:29 PM, Peter Karlsson <peter at softwolves.pp.se> wrote:

> Hi!
>
> I'm working with two devices that can have their IP addresses configured
> dynamically by DHCP. I know the other device's Ethernet MAC address. Is
> there a way to look up the other device's IP address using DHCP or some
> other protocol?
>
> I cannot simply look up ARP tables because the other device will not be in
> my device's ARP cache before I've actually communicated with it, and the
> other device will not know my address until I send it a message, so it
> cannot initiate communication, either.
>
> I almost thought I had found the solution in InARP, but it doesn't seem to
> be support Ethernet. Does anyone know of an alternative?
>
> I've been toying with the idea of scanning the entire subnet, but if I'm
> on
> something like a 10.0.0.0/8 network, that would take quite some time.
>
>
> I'm sorry if this is the wrong mailing list to ask, it seemed like the
> right
> place for this kind of question, though.
> --
> \\// Peter - http://www.softwolves.pp.se/
>
>




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