DHCP will not grab ip.

Dave Feustel dfeustel at mindspring.com
Thu Oct 9 13:12:15 UTC 2008


On Thu, Oct 09, 2008 at 02:16:23PM +0200, Michael Magua wrote:
> On Thu, Oct 9, 2008 at 12:15 AM, Dave Feustel <dfeustel at mindspring.com>wrote:
> 
> > On Wed, Oct 08, 2008 at 10:20:17PM +0100, Laura Speck wrote:
> > > Hey all,
> > >
> > > I am having a problem with a brand new install of Fedora 9. This
> > > machine has two nic's, eth0 and eth1. They are both . We currently
> > > have eth0 plugged into a router, had eth1 plugged in earlier to try it
> > > as well but we have this problem on both nics.
> > >
> > > Basically, on install we specified that both nics were to be dhcp, and
> > > to come up on boot. But neither of them get an ip on boot. I know that
> > > it's not a problem with the cable, as we plugged it into a different
> > > machine and it works fine. I don't think it's a problem with the nics
> > > as I can't see both of them being toast on a new machine.
> > >
> > > ifconfig eth0 up does nothing. I've gotten someone local to the server
> > > to try dhclient eth0 and then tail /var/log/messages. We see
> > > DHCPREQUEST, a bunch of DHCPDISCOVER lines and then end with a "No
> > > DHCPOFFERS received" message. ifconfig never shows either interface as
> > > having an "inet ..." line, but they get an "inet6 ..." line. I know
> > > it's not a problem with the dhcp server because it's our isp's, and
> > > our other machines can grab an ip fine.
> > >
> > > I've shut off Networkmanager (service NetworkManager stop) and started
> > > the network (service network start).
> > >
> > > service network start outputs:
> > > Bringing up loopback interface [OK]
> > > Bringing up interface eth0:
> > > Determining IP information for eth0... failed. [FAILED]
> > > Bringing up interface eth0:
> > > Determining IP information for eth1... failed. No link available.
> > > Check cable. [FAILED]
> > >
> > > Our /etc/sysconfig/network-scripts/ifcfg-eth0 looks like...
> > >
> > > DEVICE=eth0
> > > BOOTPROTO=dhcp
> > > ONBOOT=yes
> > >
> > > Any tips would be greatly appreciated. Thanks in advance!
> > >
> > > Laura
> >
> > I have F9 running on a computer with just one nic. Everything worked
> > until about a week ago, when the nic suddenly no longer automatically
> > got a dhcp address. My work around is to run dhclient etho &. DHCP
> > connects then. I still haven't figured out why this happened or what
> > the correct fix is.
> >
> 
>  You're missing the HWADDR= stanzas in your configs. This tells the kernel
> which NIC is actually eth0 and eth1 by identifying the MAC address.

F9 worked fine for a couple of weeks before dhclient stopped working.
Where can I get copies of the missing stanzas and into which file(s) should they
be reinserted?

Thanks.




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