[mrtg] Re: Link Errors on Router

Alex van den Bogaerdt alex at slot.hollandcasino.nl
Thu Mar 29 02:05:54 MEST 2001

Martin Rheumer wrote:

> Its now drawing errors..
> BUT..
> The error count went up 8 errors during the 5 min sample
> period and the graph drew 88 errors.

The perhour option is set.  This basically means that the
numbers for the rate are multiplied by 3600.

So, 8 errors in *approximately* 300 seconds
--> 8/300 errors per second
--> 8/300*3600 errors per hour
--> 96 errors per hour.

I said: approximately 300 seconds.  To reach 88 errors per hour
when you measured 8 errors, the interval must have been 327 seconds
or, more likely, the interval wasn't measured on proper boundaries
but for instance one minute off (so: hh:06 to hh:11, not hh:05 to hh:10)
What happens in that case is that a part of the errors are recorded
into another interval just before or after the one having 88 errors
per hour.

 / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
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