Network/Server monitoring.

[Travis Roy]

Hi, one of my new projects at my new job is to set up some network/server
monitoring. Right now they're leaning towards What's Up Gold. Mostly
because it's fairly easy to setup and I've used it in the past at two
previous jobs.

I would like to switch to something linux based. I'm installing Nagios
right now on my home server to tinker with it and see how it compairs. I
was just wondering what people on the list have tried and what they would
suggest I take a look at.

I need it to not only monitor servers by ping, but also services on the
machine, as well as CPU/Memory usage (via SNMP most likely) and routers
and switches (also via SNMP).

Pretty charts and graphs are a big plus :)