/etc/sysconfig/networking/network-scripts/

ifcfg-bond0

DEVICE=bond0
BOOTPROTO=none
BROADCAST=192.168.1.255
IPADDR=192.168.1.220
NETMASK=255.255.255.0
ONBOOT=yes
USERCTL=no

ifcfg-eth1

DEVICE=eth1
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no

ifcfg-eth2

DEVICE=eth2
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no

/etc/modprobe.conf

alias bond0 bonding