Neil Aggarwal wrote: > I just need something that gives me a usage graph > at daily, weekly, and monthly intervals with a 95% > line. Don't use RRD for billing 95% it will not be accurate as RRD averages values over time. I use rtg (not mrtg, but rtg) together with SNMP to get accurate 95% readings at the interface/port level. sflow is also a sampling mechanism, but it is pretty accurate depending on the interval, you can see this site for accuracy on sflow: http://www.sflow.org/packetSamplingBasics/index.htm If your just using rrd for casual monitoring, no problem but if your using it for billing at 95% then be careful. nate