On Wed, Jul 15, 2009 at 5:53 PM, nate<centos at linuxpowered.net> wrote: > Les Mikesell wrote: > >> There are several tools that will collect interface traffic data via >> SNMP and record it so you can graph, show high/low/average values over a >> time span, etc. Cacti (in the epel repo) is probably the easiest to set >> up, OpenNMS (http://www.opennms.org) probably the most complete. These >> could also get their data from a port on a managed switch or router if >> that makes it easier to show the connections you need to split out. > > One thing to note for billing, often times bandwidth is billed on > a 95th percentile level, and cacti is not good for that if you want > accuracy. > > We use RTG(in my research last year it seemed RTG was the most > frequently mentioned tool that was best for this purpose) to measure > our main pipes for billing comparison purposes, matches much closer > to what the ISPs say, and cacti is quite a bit off. I wouldn't rely > on RTG for normal network monitoring(UI isn't that good etc), but > for links where billing information is important at least for 95th > percentile, don't rely on cacti alone. > > Note RTG is not the same as MRTG, though I think I recall seeing RTG > was inspired by MRTG. > > Not sure how OpenNMS handles that sort of thing. > > Not to knock cacti, I use it extensively, currently have a server > collecting more than 20 million points of data a day. > > nate > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > +1 for RTG