[mrtg] MRTG-bugs

nangineni praneeth nv_2030 at yahoo.com
Wed Dec 17 21:11:28 CET 2008



Hello everyone

                      ... I am using MRTG in my masters project and i
think i have noticed few errors in it...........

1) I have
calculated the log file entries in the log file and took the average
over the time for which i ran MRTG.......The value which it shows it
different from the value which it graphed....Ther were couple of people
who posted this question on the mrtg forum but no one has replied....So
does anyone think this is a error or the way i am calculating it is wrong

2)
I posted this on the MRTG forum and one of them
tried to give me an explanation for this.......its  with the green
colour traffic....the traffic is showing as if it starts from
zero....because i limited the amount of traffic the server sends to
4kBPs so i must see a constant line(or sawtooth like graph) on MRTG
graphs but everything starts from zero......i
have checked my logfile and there are no zeroes in it.........But the
outbound traffic is showingup correctly like a sawtooth
waverform(because of TCP).........The same thing happened when i was
monitoring TCP connections on the server i suppressed the blue colour
graph and the same story every sample MRTG is graphing starts from
zero..........I am attaching a png image so that everyone can understand it
better

3) 
I am using cisco router and when i saw the 5 min average input rate and
output rate..The values are different from the values MRTG is
reporting.................I have checked this many times.......

....I ran MRTG  continuously for 15 hours and and found
 these things

Regards
Venkat




      
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