alert tool for out-of-norm bandwidth?

["matthew zeier" <mrz () velvet org>]

I'm looking for some sort of tool that tracks bandwidth on a switch port and
when the bit rate "suddenly" changes from the baseline alerts me.

I'm playing with Team Cymru's darknet project and basically need an
automated way of noting darknet traffic increase and then trigger a nagios
alert.

If there isn't something like this, I'll have to write it I guess.

thanks.

--
matthew zeier - "Curiosity is a willing, a proud, an eager confession
of ignorance." - Leonard Rubenstein