[mrtg] Re: Returned values being rolling over, clipped or something

[Alex van den Bogaerdt]

> A few weeks ago I had a problem when the values to be graphed by MRTG seemed
> to be lower than should be expected. The interfaces being graphed having
> this problem all regularly see in the order of at least 100Mb going through
> them. When the traffic over the interface gets up to around 100Mb MRTG
> starts to graph it as being much lower, as if suddenly there were a lot of
> dropped packets. I checked the interface and the number of packets through
> it did not compare to that shown by MRTG. When I change the frequency of the
> crontab for running MRTG from every 5 minutes to every minute the graphing
> becomes normal. I don't much like the idea of having to send snmp gets to
> the interfaces that frequently if I can otherwise help it. Is this due to a
> limitation of SNMP, of MRTG or something that I have overlooked?
> Rod Oliver
> 

Yup, you've overlooked the mail list archive. Please look back for
numerous discussions on this.

In short: switch to RRDtool so you won't get caught by 32 bit counters.

Alex

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