Subject: Re: dom0/domU bridging - don't get it to work
To: Florian Heigl <floh@deranfangvomen.de>
From: Manuel Bouyer <bouyer@antioche.eu.org>
List: port-xen
Date: 09/12/2005 22:37:59
On Mon, Sep 12, 2005 at 01:30:53AM +0200, Florian Heigl wrote:
> Hi,
>
> I don't want to waste anyone's time, but I just don't get this to work.
>
> I'm running xen-2.0.7 on what I think is the most current snapshot of
> 3_BETA (NetBSD 3.0_BETA (XEN0) #0: Sat Aug 13 13:50:25), and my dom0
> luckily is running fine, with X and everything I could wish for.
>
> I'm trying to run another NetBSD in the first domU; after problems
> using a file backend I've simply plugged in an USB stick. It's too
> small for any real work of course, but OK for testing.
> Unfortunately, I don't get to ftp the distribution packages.
>
> I need to be able to DHCP the ip address for the domU and somehow just
> don't get the bridge to work, and hope someone is able to spot where
> I went wrong.
>
> Bridge configuration:
>
> xen-host-2# cat /etc/ifconfig.bridge0
> create
> !brconfig add fxp0 up
>
> xen-host-2# brconfig -a
> bridge0: flags=41<UP,RUNNING>
> [...]
> Interfaces:
> fxp0 flags=3<LEARNING,DISCOVER>
> port 1 priority 128
> [...]
>
>
> Domain Config
>
> xen-host-2# cat xm.dom1.netbsd
> kernel = "/export/xen/dom1/netbsd-INSTALL_XENU.gz"
> memory = 64
> name = "xen-u-1"
> nics = 1
> root = "/dev/wd0d"
> vif = [ 'mac=aa:00:00:55:03:f0','bridge=bridge0' ]
>
> in ifconfig I see fxp0, bridge0, and the vif for the domU,
> the later is not in state 'UP', but manually changing this state
> made no difference as far as I can tell.
Is the domU's xvif added to the bridge ? check with brconfig.
Here is my xen/scripts/vif-bridge:
#!/bin/sh
set -e
echo "vif-bridge $*"
# Operation name.
OP=$1
shift
# Pull variables in args into environment
for arg ; do export "${arg}" ; done
# Required parameters. Fail if not set.
domain=${domain:?}
vif=${vif:?}
mac=${mac:?}
bridge=${bridge:?}
# Optional parameters. Set defaults.
ip=${ip:-''} # default to null (do nothing)
case $OP in
up)
ifconfig x${vif} up
brconfig ${bridge} add x${vif}
exit 0
;;
down)
exit 0
;;
*)
echo 'Invalid command: ' $OP
echo 'Valid commands are: up, down'
exit 1
;;
esac
--
Manuel Bouyer <bouyer@antioche.eu.org>
NetBSD: 26 ans d'experience feront toujours la difference
--