Cacti

The Poohbah’s Endorse Cacti: The Complete RRDTool-based Graphing Solution

Cacti is a complete network graphing solution designed to harness the power of RRDTool’s data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an intuitive, easy to use interface that makes sense for LAN-sized installations up to complex networks with hundreds of devices.

Screenshots | Features

I set this up the other day on our generic network administration Fedora Core 3 box and it took about 30 minutes from downloading to the first graph. Truly an excellent package. No programming necessary, everything can be run through the web gui. Full effectiveness does require a knowledge of what you are measuring and why.