출처 : http://www.techotopia.com/index.php/Creating_a_CentOS_6_KVM_Networked su – cd /etc/sysconfig/network-scripts
If the interface to be bridged is currently running it should be taken down before proceeding:
ifdown eth0
The next step is to add a script file to establish the bridge for the physical network device. In this example the device is eth0 so we need to create a file name ifcfg-eth0 and add the following lines to it. For the purposes of this example we will name the interface br0:
DEVICE=eth0
onBOOT=yes
BRIDGE=br0
The next step is to create a script file for the bridge interface. The name of this file must take the form ifcfg-<bridgename> where <bridgename> matches the name of the bridge defined in the BRIDGE= directive outlined above. Given this requirement, we will name the file ifcfg-br0. The contents of this file for this example will read as follows:
DEVICE=br0
onBOOT=yes
TYPE=Bridge
BOOTPROTO=dhcp
STP=on
DELAY=0
Note that the DEVICE= line must refer to the bridge name previously specified (i.e. bridge0 in this instance). Save the file and then start up both interfaces:
ifup eth0
ifup br0
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