[CentOS] Re: [OT] What is the best network monitoring tool?

so has anybody had any good exp. with zenoss? I fired it up once for a
couple of hours, tried to get the disk usage info using it, but
failed. didn't have that much time to get into it, just used cacti
instead.. but i would love to get some more functionality out of it,
like auto discovery (the plugin for cacti doesn't do anything useful)