[mrtg] Re: negative counters SOLVED

Tobias Oetiker oetiker at ee.ethz.ch
Mon Oct 1 22:54:56 MEST 2001

Today Tyler J. Frederick wrote:

> Gang... I think I solved it..
> Upon reviewing the MRTG source code, it appears that all RRD's are created
> with a minimum of zero.  This being the case, if anyone is querying
> Checkpoint's mib, make sure you run an "rrdtool tune <file> -i
> ds0:-100000000 -i ds1:-10000000" or something similar so it will handle
> the negative numbers correctly.. Perhaps a "MinBytes" option in the next
> mrtg?

Hi Tyler,

Sorry to disapoint you, but this will not solve the problem ... min
and max in rrdtool are related to the data rate and not to the
counter values ....

It is highly likely that the counter in your device is rather
broken ... you could try to 'and' the counter value with 2^31-1


> tf.

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