REPOST: Source: Only Ubuntu Linux:
Bonding is creation of a single bonded interface by combining 2 or more ethernet interfaces. This helps in high availability and performance improvement.
How to setup dual-dual bonding (two bonds of two interfaces each) on Ubuntu as quickly as possible.
1. Add two lines to /etc/modules
bonding bond0 -o bond0 mode=1 miimon=100
bonding bond1 -o [...]

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From the site:
GroundWork Monitor Community Edition provides a essential IT monitoring solution that enables you to maintain network visibility and control.
This is a single server deployment that leverages the strengths of 15 other open source projects such as Nagios, rrdtool and nmap. It combines the results of these projects in to a system that evaluates [...]

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