[Xen-users] dhcp requests being ignored wit reason "not authoritative"

[Henning Sprang <henning_sprang@xxxxxx>]

Hi,
I am trying to get an IP adress, nfs root host and directory information
for a xen vm on the kernel level at boot time from dhcp.
When the dhcp requests from the xen VM arrive on my server, my dhcp
server denies to give them an IP address, it's syslog reads:

May  4 05:13:21 amalgam dhcpd: DHCPREQUEST for 255.255.255.255 (1.2.3.4)
from 00:16:3e:00:00:11 via eth0: ignored (not authoritative).

However, if I boot the same vm config without the nfs root option, and
let it request ip configuration from nfs with the userland dhcp client,
everything is fine, but syslog looks slightly different:

May  4 05:09:49 amalgam dhcpd: DHCPDISCOVER from 00:16:3e:00:00:11 via eth0
May  4 05:09:49 amalgam dhcpd: DHCPOFFER on 192.168.0.57 to
00:16:3e:00:00:11 via eth0
May  4 05:09:49 amalgam dhcpd: DHCPREQUEST for 192.168.0.57
(192.168.0.133) from 00:16:3e:00:00:11 via eth0
May  4 05:09:49 amalgam dhcpd: DHCPACK on 192.168.0.57 to
00:16:3e:00:00:11 via eth0

(How)Do I need to tweak xen's or my dhcp's config? Or maybe try another
dhcp server? I am using the isc server from the dchp3-server package on
Debian Sarge.

Henning



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