1. 在 redhat host机器上:
### Create br0 file on proper folder of host and input data.
[root@ilx0fc06a network-scripts]# pwd 
/etc/sysconfig/network-scripts
 
[root@ilx0fc06a network-scripts]# vi ifcfg-br0
 
DEVICE="br0"
IPADDR=9.11.216.37
NETMASK=255.255.254.0
GATEWAY=9.11.216.1
TYPE=Bridge
STP=on
DELAY=0
 
2.在 redhat host机器上:
### Check the bridge created correctly as:
[root@ilx0fc06a network-scripts]# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.e41f13da124a yes eth2 vnet0
virbr0 8000.525400621050 yes virbr0-nic
3. 到redhat Host VMM GUI 上, 将 虚拟机 网络的 adapter 设为 br0 
4. 在 redhat 虚拟机上 Set IP:
ifconfig etch1 9.11.216.74 netmask 255.255.254.0 up 
route add default gw 9.11.216.1 dev eth1
service network restart