Configure another network interface using either the system-config-network GUI or creating a new configuration file in /etc/sysconfig/network-scripts. Below is an example configuration file for a second network interface called eth1

#/etc/sysconfig/network-scripts/fcfg-eth1
DEVICE=eth1
BOOTPROTO=static
ONBOOT=yes
USERCTL=no
IPV6INIT=no
PEERDNS=yes
TYPE=Ethernet
NETMASK=255.255.255.0
IPADDR=10.1.1.1
GATEWAY=10.1.1.254
ARP=yes

Copy /etc/xen/scripts/network-bridge to /etc/xen/scripts/network-bridge.xen.

Edit /etc/xen/xend-config.sxp and add line to your new network bridge script (we will call the script network-xen-multi-bridge(example below) The new line should read network-script network-xen-multi-bridge and remove the commenting on the line called network-script network-bridge.

Create a custom script to create multiple Red Hat Virtualization network bridges. A sample scripts is below, this example script will create two Red Hat Virtualization bridges (xenbr0 and xenbr1) one will be attached to eth1 and the other one to eth0. If you want to create additional bridges just follow the example in the script and copy/paste the lines accordingly:

#!/bin/sh
# network-xen-multi-bridge
# Exit if anything goes wrong.
set -e
# First arg is the operation.
OP=$1
shift
script=/etc/xen/scripts/network-bridge.xen
case ${OP} in
start)
	$script start vifnum=1 bridge=xenbr1 netdev=eth1
	$script start vifnum=0 bridge=xenbr0 netdev=eth0
	;;
stop)
	$script stop vifnum=1 bridge=xenbr1 netdev=eth1
	$script stop vifnum=0 bridge=xenbr0 netdev=eth0
	;;
status)
	$script status vifnum=1 bridge=xenbr1 netdev=eth1
	$script status vifnum=0 bridge=xenbr0 netdev=eth0
	;;
*)
	echo 'Unknown command: ' ${OP}
	echo 'Valid commands are: start, stop, status'
	exit 1
esac