NIC bonding with Ubuntu

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Network interfaces can be bonded to provide fault-tolerant operation. Here’s how to do it in Ubuntu. I will assume the interfaces to be bonded are eth0 and eth1.

First, install the ifenslave package. The ifenslave tool will be used to actually bond the interfaces.

Create file /etc/modprobe.d/bonding with the following contents:

Load the bonding module:

Add a bonded interface into /etc/network/interfaces:

Restart networking:

That’s it! The bonded interface should come up automatically after a reboot as well.

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