[mrtg] Percentage and calculation with OIDs ??

[BALLO Ismaël]

Hi,

I use a formula to obtain Frame Error Rate for a radio-modem :

%Error = RF/(RF+TF)*100

where RF : Retransmitted Frame
TF : Transmitted Frame.

In terms of OIDS for BreezeAccess Products, it gives :
WorkDir: /home
Target[bmbms]:
1.3.6.1.4.1.710.3.3.8.2.3.3.0&1.3.6.1.4.1.710.3.3.8.2.3.3.0:public at bmbms /
(1.3.6.1.4
.1.710.3.3.8.2.3.3.0&1.3.6.1.4.1.710.3.3.8.2.3.3.0:public at bmbms +
1.3.6.1.4.1.710.3.3.8.2.3.1.0&1.3.
6.1.4.1.710.3.3.8.2.3.1.0:public at bmbms)
Unscaled[bmbms]: ym
MaxBytes[bmbms]: 1
Factor[bmbms]: 100
Suppress[bmbms]: y
Options[bmbms]:  gauge, nobanner, transparent, noo, dorelpercent
#Xsize[bmbms]: 600
#Ysize[bmbms]: 200
YLegend[bmbms]: % Error
LegendO[bmbms]:  Frame Error Rate
Legend2[bmbms]: Errors in %
Title[bmbms]:  Frame Errors.
PageTop[bmbms]: Average Signal Strength / Errors -- Sample.


But, unfortunately, I don't receive what I expect.
I 've got no errors but obtain always 0.
MRTG does some round maybe or do i have to use an option ?
MaxBytes confuses me but it complains in not using it in cfg file.

TIA.

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