Vorraussetzung: netzwerk mit eth0 und eth1 getestet 

ethtool eth0 | grep 'Link detected: yes'
ethtool eth1 | grep 'Link detected: yes'

/etc/modprobe.conf.local : SLES 11SP1

/etc/modprobe.d/bonding.conf : CentOS 5 

alias bond0 bonding
options bonding miimon=100 mode=0 use_carrier=0

SLES 11SP1

/etc/sysconfig/network/ifcfg-bond0 : 

BOOTPROTO='dhcp4'
STARTMODE='onboot'
NAME='bonding device'
BONDING_MASTER=yes
BONDING_SLAVE_0='eth0'
BONDING_SLAVE_1='eth1'
mv /etc/sysconfig/network/ifcfg-eth0{,.bak}
mv /etc/sysconfig/network/ifcfg-eth1{,.bak}
service network restart

CentOS 5

/etc/sysconfig/network/ifcfg-bond0 : 

DEVICE=bond0
ONBOOT=yes
BOOTPROTO=dhcp
USERCTL=no
BONDING_OPTS="miimon=100 mode=0 use_carrier=0"

/etc/sysconfig/network/ifcfg-eth0 : 

DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
MASTER=bond0
SLAVE=yes
USERCTL=no

/etc/sysconfig/network/ifcfg-eth1 : 

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