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RE: Dhclient problem



On Tue, 2007-10-23 at 18:25 -0400, Wandell, Doug wrote:
> On Tue, 23 Oct 2007 17:37:10 -0400
> "Wandell, Doug" <dwandell mitre org> took out a #2 pencil and
> scribbled:
> 
> > I've rolled an FC6 live cd that configures eth0 via dhcp. The
> > default configuration works fine
> > - /etc/sysconfig/network-scripts/ifcfg-eth0: DEVICE=eth0
> > ONBOOT=yes
> > BOOTPROTO=dhcp
> > HWADDR=<MAC address>
> >  
> > In Wireshark, I see the DHCP Discover, Offer, and ACK. No problem.
> >  
> > As soon as I add:
> > DHCLIENTARGS="-s 192.168.1.100"
> >  
> > to /etc/sysconfig/network, dhclient hangs indefinitely. Using
> > Wireshark on the dhcp server, I can see the DHCP Discover packets
> > coming in, and the server's DHCP Offer response. But the FC box
> > won't accept the offer.
> >  
> > Anybody know what's going on here?
> 
> Have you attempted to run dhclient in the foreground to see what
> it's doing or possibly spitting to the terminal? Something like
> 
> dhclient -d -s 192.168.1.100 
> 
> This should force it to stay in the foreground and you can see what
> is happening. I forget where dhclient logs. I
> think /var/log/messages...but if you've been muckin' around a
> lot you may have to grep for the dhclient entries.
> 
> -- 
> ethericalzen gmail com
> Life is a prison, death is a release
> 
> 
> I'm making some progress - It looks like dhclient cannot reply to the
> server while running in -s mode due to the lack of a gateway being
> configured.  I ran dhclient as you suggested - there was no output, but
> while it hung, I issued a 'route add default dev eth0' in another
> terminal and boom, it worked.
> 
> Somewhere in the back of my leaky brain I seem to remember a bug report
> citing something similar.  Bugzilla is my next stop if I can't figure
> out how to coax dhclient into setting a gateway.

You can add "prepend routers www.xxx.yyy.zzz" to /etc/dhclient.conf.

----------------------------------------------------------------------
- Rick Stevens, Principal Engineer             rstevens internap com -
- CDN Systems, Internap, Inc.                http://www.internap.com -
-                                                                    -
-         C program run. C program crash. C programmer quit.         -
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