Xen users - Jul 2006 - Unable to get networking working with HVM guests

All,

I have a Windows machine running as an HVM guest, but I am unable to  
get networking to work. I have tried a number of different things,  
but all with no result.

After each change to /etc/xen/xend-config.sxp I find that I have to  
reboot for the changes to work. Restarting xen by doing /etc/init.d/ 
xend restart kills all dom0 networking.

The two main things that I have tried so far are as follows:
Bridged networking via dummy0
In /etc/xen/xend-config.sxp I have the following:
(network-script network-bridge netdev=dummy)
(vif-script vif-bridge)

In my vm config I have the following:
vif = [ ''type=ioemu, bridge=xenbr0, ip=192.168.11.2'' ]

dummy0 has an IP address of 192.168.11.1 with a subnetmask of  
255.255.255.0
I then configure windows to use 192.168.11.2 as the IP address. I am  
unable to ping 192.168.11.1 and I am unable to ping windows from dom0

I then tried bridging to eth0:2 which is an existing interface on  
dom0 that all the other machines on my network use as their default  
gateway. This results in the following changes...

/etc/xen/xend-config.sxp:
(network-script network-bridge netdev=eth0:2)
(vif-script vif-bridge)

vmconfig:
vif = [ ''type=ioemu, bridge=xenbr0, ip=192.168.10.100'' ]


I restart my actual machine after these changes, then when it comes  
back, I start my guest machine. I then change the IP to be  
192.168.10.100. I am unable to ping 192.168.10.1 from the guest and I  
can''t ping 192.168.10.100 from dom0.

During all of these tests, tcpdump shows no traffic at all.

Can anyone advise how I go about fixing this please ?

-- 
Wayne Pascoe    (gpg --keyserver www.co.uk.pgp.net --recv-keys 79A7C870)
I laugh in the face of danger... Then I
run and hide until it goes away!



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