Tim, I believe throughput measurement has to do with the way you compute it. ntop calculates the actual thpt on an interval >= 10 sec. The thpt graphs are calculated as follows: - last 60 mins. thpt: ntop computes the throughput every minute - last 24 hours thpt: Each hor ntop calculates the average thput on the last 60 mins - 30 days Similar to 24 h. MRTG by default (I think) calculates the thput evry 5 minutes. In the same period of time ntop computes 5 times the thpt. Hence the thpt measurement has to be different expecially if you have burst traffic. Nevertheless in general the measurement of both MRTG and ntop shopuld be similar. Retransmitted data has nothing to do with thpt calculation (see the ntop code). Cheers, Luca > "Walker, Tim" wrote: > > Luca, > > We're still seeing discrepancies in throughput (load) usage, > and I'm supposing it has something to do with how retransmits are > counted. We were just wondering how you count those packets in the > Load graph at all. > > Tim Walker -- Luca Deri Telecom Italia IT Via Matteucci 34/B 56124 Pisa, Italy. Ph. +39/050/968.639 Fax. +39/050/968.626 Email: [EMAIL PROTECTED] WWW: http://luca.ntop.org/ ICQ: 68183632 Software is about stuff, about getting hands dirty - Jim Coplien
