Re: [gentoo-user] sub-net 0.0.0.0 [SOLVED]

[Nick Rout <nick@rout.co.nz>]

On Sat, 2005-08-27 at 23:35 -0600, Joseph wrote:
> On Sat, 2005-08-27 at 10:23 +0100, Neil Bothwick wrote:
> > On Fri, 26 Aug 2005 17:20:12 -0600, Joseph wrote:
> > 
> > > Is there a way to check what IP the device has on the network?
> > > I know the device MAC address and when I plug it IN, it obtains one of
> > > the IP via DHCP.   With 
> > > arp -a IP
> > > arp -e 
> > > I can only check the MAC address.   Is there a way to other way around. 
> > 
> > Try arp -a
> 
> Very closed.  but better yet is:
> Knowing MAC address but looking for IP
> tcpdump -e -i eth0 |grep -i "00:09:45:52:04:da"
> Since I know the MAC address, the above command will capture the IP
> address of the device when plugged into the server.
> 
> Knowing IP address but looking for MAC
> ping IP
> arp -e

of course arp will only work if the device has actually done anything on
the network within arp's cache period. I just tried arp -a and found my
wireless AP did not appear in the list, probably because I haven't used
wireless for a few days. I pinged the (known) address and then tried
again and it showed up. 

> 
> -- 
> #Joseph
-- 
Nick Rout <nick@rout.co.nz>

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