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Bonding is creation of a single bonded interface by combining 2 or more ethernet interfaces. This helps in high availability and performance improvement.
Steps for bonding in Fedora Core and Redhat Linux
Step 1.
Create the file ifcfg-bond0 with the IP address, netmask and gateway. Shown below is my test bonding config file.
Modify eth0, eth1 and eth2 configuration as shown below. Comment out, or remove the ip address, netmask, gateway and hardware address from each one of these files, since settings should only come from the ifcfg-bond0 file above.
$ cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=none
#HWADDR=00:12:17:5C:A7:9D
#IPADDR=192.168.1.12
#NETMASK=255.255.255.0
#TYPE=Ethernet
#GATEWAY=192.168.1.1
#USERCTL=no
#IPV6INIT=no
#PEERDNS=yes
ONBOOT=yes
# Settings for Bond
MASTER=bond0
SLAVE=yes
Bonding Mode: adaptive load balancing
Primary Slave: None
Currently Active Slave: eth2
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth2
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:13:72:80: 62:f0
Look at ifconfig -a and check that your bond0 interface is active. You are done!
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