Re: [Xen-users] 1 host, 1 nick, 1 regular bridge, 1 local bridge, 5 vm

[Simon Hobson <linux@xxxxxxxxxxxxxxxx>]

John Rounds wrote:
> So Working on CEntOS 5  I am trying to sett up Xen with 2 bridges, 
> one that connects dom0 and most of the domU to the physical card and 
> the out to the network.  Got that figured out no problem, now i want 
> to have a second bridge that runs a local network for all the doms 
> that doesn't connect to the network.
> With code I have found used in multiple places I can easily get 2 
> bridges, and have all the Domu connected to it but i can't get Dom 0 
> to have an interface.
> Script to set up bridges called fine from xend-config.sxp
>
> ]# cat multiple-bridge
> #!/bin/sh
> dir=$(dirname "$0")
> "$dir/network-bridge" "$@" vifnum=0 netdev=eth0 bridge=xenbr0
> "$dir/network-bridge" "$@" vifnum=2 netdev=dummy bridge=xenbrloc1
I'd suggest you setup the local bridge manually - not in Xen.

Is this Debian ? If so then you can put something like this in 
/etc/network/interfaces - check the syntax, I'm typing this from 
memory :
auto xenbrloc1
xenbrloc1 inet static
  ip address a.b.c.d
  netmask w.x.y.z
  pre-up brctl addbr xenbrloc1
  post-down brctl delbr xenbrloc1

I think this should work for you. What happens is that when the I/F 
is brought up, the bridge is created first (pre-up), and then the IP 
addr is added to it. The bridge is automatically deleted if the I/F 
is taken down.
For other distros you'll need to adapt as required.

--
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.

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