Re: DHCP Issues

[Dan Williams <dcbw redhat com>]

On Fri, 2005-12-09 at 13:36 -0700, Ted Lemon wrote:
> On Friday 09 December 2005 07:40, Paul Dugas wrote:
> > Is anybody having trouble with NM with Windows DHCP servers?  NM works
> > like a champ for me at a few of my sites.  At one customer's site
> > however, it's just irritating.  I'm getting no response from the DHCP
> > server when using NM.  When I boot over to Windows, it works fine.  If I
> > disable NM and just 'ifup eth0', it works fine as well.  I think if I
> > pull the plug and put it back about a dozen or more times, it'll
> > eventually work.
> 
> So the same DHCP client works with ifup and not with NM?   In that case, it 
> would be helpful to do a packet trace to see what the two clients are 
> sending.   Try this:
> 
> tcpdump -n -v -v -s 1500 -i eth??? -x -h udp port 67
> 
> eth?? is the name of the network interface on which you want the dump.
> 
> If you don't see anything obvious in the dumps, I can take a look at them.   
> I'd guess it's a difference in the hostname option, the client identifier, or 
> something like that.

That could be it... NM by design doesn't change the hostname of the
machine, because that horribly, horribly screws up X.

But you can add options to dhclient's config file, and those will work
just fine.

Dan