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Configuring bridge interfaces
To build a bridge interface, the bridge-utils package is required. The bridge interface should be configured in /etc/sysconfig/network-scripts/ to be automatically started by the network service or by the ifup command.
For example, to build a bridge interface br0 over the eth0 and eth1 interfaces, the following configuration files can be used:
DEVICE=br0 TYPE=Bridge IPADDR=192.168.0.1 NETMASK=255.255.255.0 ONBOOT=yes
DEVICE=eth0 BRIDGE=br0 ONBOOT=yes
DEVICE=eth1 BRIDGE=br0 ONBOOT=yes