[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

Regards,
Dan.
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