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Manage interface bondings through sysfs interface

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This is a easy way to manage your bondings through the sysfs interface.

Load the bond module:

# modprobe bond

Create a new bonding bond0:

echo "+bond0" >  /sys/class/net/bonding_masters

View the existing bondings:

# cat /sys/class/net/bonding_masters
bond0 bond1

Add interfaces to bond0 bonding:

echo "+eth0" > /sys/class/net/bond0/bonding/slaves
echo "+eth1" > /sys/class/net/bond0/bonding/slaves

Remove an interface from an existing bonding

echo "-eth0" > /sys/class/net/bond0/bonding/slaves

Remove the bond0 inteface

echo "-bond0" >  /sys/class/net/bonding_masters

Change the bonding mode (The bond interface must be down before the mode can be changed.):

echo balance-alb > /sys/class/net/bond0/bonding/mode

or

echo 6 > /sys/class/net/bond0/bonding/mode

A full example:

# modprobe bonding
# modprobe e100
# echo balance-alb > /sys/class/net/bond0/bonding/mode
# ifconfig bond0 192.168.1.1 netmask 255.255.255.0 up
# echo 100 > /sys/class/net/bond0/bonding/miimon
# echo +eth0 > /sys/class/net/bond0/bonding/slaves
# echo +eth1 > /sys/class/net/bond0/bonding/slaves

References: https://www.kernel.org/doc/Documentation/networking/bonding.txt [3.4]