# Install the required packages

yum install bridge-utils

BRIDGE
------

/etc/sysconfig/network-scripts/

#ifcfg-br0
DEVICE=br0
TYPE=Bridge
IPADDR=192.168.1.1
NETMASK=255.255.255.0
ONBOOT=yes
BOOTPROTO=none
NM_CONTROLLED=no
DELAY=0

#ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
HWADDR=AA:BB:CC:DD:EE:FF
BOOTPROTO=none
ONBOOT=yes
NM_CONTROLLED=no
BRIDGE=br0

#### USE SCREEN!!
service network restart 

================================
BOND >>> 2 or more eth interfaces!
----

#ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
USERCTL=no
SLAVE=yes
MASTER=bond0
BOOTPROTO=none
HWADDR=AA:BB:CC:DD:EE:FF
NM_CONTROLLED=no

#ifcfg-eth1
DEVICE=eth1
TYPE=Ethernet
USERCTL=no
SLAVE=yes
MASTER=bond0
BOOTPROTO=none
HWADDR=AA:BB:CC:DD:EE:FF
NM_CONTROLLED=no

#ifcfg-bond0
DEVICE=bond0
ONBOOT=yes
BONDING_OPTS='mode=1 miimon=100'
BRIDGE=br0
NM_CONTROLLED=no

#ifcfg-br0
DEVICE=br0
ONBOOT=yes
TYPE=Bridge
IPADDR=192.168.1.1
NETMASK=255.255.255.0
NM_CONTROLLED=no

# ifup bond0
#### USE SCREEN!!
# service network restart 

==========================

For DHCP and not static

DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes