Cacti

Thanks all! Looks as if the CDEF stuff worked... took a bit to tweak it, but it first adds input 2 and 3 (student traffic primary and failover (something + heartbeat ) ) then subtracts that total from input 1. I had to create a 4th data source (with no datasource associated) to do the final bytes to...

Correct. But I can't find how or where to do simple subtraction of two data sets to graph that difference...

Looking to create a graph of the difference between two interfaces. We have our traffic out to the Internet graphed, and we have our student traffic portion of that traffic graphed. I would love to graph the total traffic (green) minus student traffic (red) resulting in the admin base traffic. Curre...