Posts tagged bond

linux bonding without ifenslave
posted on 2016-09-13 15:46

Sometimes you configured bonding on the switch and on the host itself. After a reboot, you figure out your server won't come up.

iKVM tells you, networking's not working.

Now the configuration can be fixed easily, but what if you simply forgot about the ifenslave package? Since your networking config is out of order, how do you get the files there?

  • boot livedisk?
  • manually plug the cable into another switchport and reconfigure unbonded networking?
  • use an USB stick plugged directly into the server and copy the missing package onto there so you can install it?

Heres another way:

#modprobe bond
# (the bonding module has to be present in the kernel)

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

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

# Remove a slave interface from bond0

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

# Delete a bond interface

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

Official documentation can be found here.

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