[et-mgmt-tools] Xen guest not receiving dhcp address

Daniel P. Berrange berrange at redhat.com
Tue Jul 24 19:14:40 UTC 2007

On Tue, Jul 24, 2007 at 03:05:37PM -0400, Caetano, Greg wrote:
> I'm working with a RHEL5 AP system (kernel 2.6.18-8.1.8.el5xen, xen
> 3.0.3-25.0.3.el5) and am not able to get the Xen guest to receive a DHCP
> address from the Dom0 dhcpd server.
> I have defined the xen mac address in the dhcpd.conf file to assign it a
> fixed address.
> >From /var/log/messages on Dom0 I can see DHCPDISCOVER and DHCPOFFER
> entries with the appropriate mac and ip address being offered but the
> Xen guest does not accept the DHCPoffer and fails to start the network
> on eth0

Try to turn off TCP checksum offload

  ethtool -K eth0 tx off

In the Dom0. If that doesn't work, try the bridge device in Dom0 too

|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=| 

More information about the et-mgmt-tools mailing list