Xen networking trouble

["Gábor Gábris" <gabrisgabor%gmail.com@localhost>]

Hi!

I have a problem with xen networking. My little home network looks like the following:
I have a router at 192.168.1.1 that connects to the internet and gives the IPs 
192.168.1.2 and 192.168.1.4 through DHCP to two computers. On the machine with 192.168.1.2 I am trying to establish a system with a linux xen dom0 (frugalware) and with a NetBSD 
3.1 domU. I use xen 3.0.3 with 

(network-script network-bridge) and 
(vif-script vif-bridge) 

entries in my /etc/xen/xend-config.sxp file. The netbsd.cfg config file I have the following entries for networking:

vif = [ '' ]
dhcp = "dhcp"

(I tried to keep it as simple as I could, because I am not very experienced in networking.)
The problem is that the domU does not get a DHCPOFFER when the installer tries to run dhclient.
Can anybody help me a bit?