We've got a medium sized network, around 800 end user ports, all HP 2610-48-PWR switches using 2gig uplinks into a pair of HP core switches. There haven't been any complaints of slowness or any indications of network problems. I'm currently using intermapper (http://www.intermapper.com/
) to monitor the network cores, server uplinks and switch uplinks.
I'm looking for a way to trigger an email alert for any time a particular network port hits a configurable percentage of utilization.
I'm not opposed to using cacti or some other product, I just don't want to scroll through 2 dozen switches at the end of every day looking for high usage spikes.