[Xen-users] Creating multiple bridges

[Andrew Kilham <andrew@xxxxxxxxxxxxxx>]

Hi,

In addition to the standard bridge eth0 that Xen creates, I had added a 
second bridge using "brctl addbr beth1" command which worked fine, and I 
then added some IP's to my domU's using the second bridge. However, when 
I restarted the server the second bridge was not there any more (as 
expected).
When I typed in "brctl addbr beth1" it said:

> device beth1 already exists; can't create bridge with the same name
Even though beth1 was not listed in "ifconfig" and there is no 
ifcfg-beth1 file in /etc/sysconfig/network-scripts . I wasn't sure how 
to fix this, so I moved on to trying a wrapper script.
I vaguely knew that you needed to create a wrapper script to 
automatically set up multiple bridges on boot, so I did some Googling 
and came up with this file:
> dir=$(dirname "$0")
> "$dir/network-bridge" "$@" vifnum=0 netdev=peth0 bridge=eth0
> "$dir/network-bridge" "$@" vifnum=1 netdev=eth1 bridge=beth1
I chmodded the file to 755 and I changed the appropriate line in 
xend-config.sxp to execute it. However, booting the server with this 
file in place returns nothing when I run "brctl show":
> [root@mars ~]# brctl show
> bridge name     bridge id               STP enabled     interfaces
The public IP assigned to dom0 works, but none of the IP's assigned to 
the domU works.
So, how do I have a bridge named beth1 with the physical interface eth1 
assigned to it, in addition to the default bridge eth0/peth0 created 
when I boot the server?
Thanks!

Cheers,

Andrew

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