[mrtg] Re: Wrong log entries when using high AbsMax-option?

[Christoph Wagner]

The reason for using the AbsMax of 1024Mbit/s was that this is the highest
bandwidth we have. So I could set AbsMax[_] as global option for all
interfaces (about 1000 are monitored)  and all devices (would work fine with
cfgmaker-script).

I don´t really know how a counter roll-over can cause such a mistake so I
think it must be a buggy software.

But since the problem with inactive device showing 1 percent cpu util within
MRTG2-9-17(by gauge-option) I am not sure if MRTG is not the thing causing
my problems.

Regards,
Chris
----- Original Message -----
From: "Alex van den Bogaerdt" <alex at slot.hollandcasino.nl>
To: "Christoph Wagner" <christoph-w at gmx.at>
Cc: "MRTG users" <mrtg at list.ee.ethz.ch>
Sent: Wednesday, September 19, 2001 1:40 PM
Subject: [mrtg] Re: Wrong log entries when using high AbsMax-option?


>
> Christoph Wagner wrote:
>
> > I have a router which has a frame-relay-connection and the bandwidth ist
set
> > to the CIR-value and CIR=MAXBYTES. As a higher value can occur I
activated a
> > AbsMAX[_]: 128000000 on all my interfaces (=1Gbit/s).
>
> No, 128000000 is not 1000 Mbit/s, it is 1024 Mbit/s.
>
> > Now I got wrong entries showing up to 80Mbit/s on a line with interface
> > clock 1Mbit/s. Can anybody explain me how this can happen and what to
do?
>
> You told MRTG that the maximum can be 1024 Mbps.  You wonder why
> you get values of upto 80 Mbps.  You know the interface speed is
> 1 Mbps.
>
> I just wonder why you didn't set AbsMax to 1 Mbps (125000) and MaxBytes
> to the CIR.
>
> Counter roll-overs may be the cause of the spikes.  Other possibilities
> include buggy software (MRTG or the SNMP agent on the device).
>
> cheers,
> --
>    __________________________________________________________________
>  / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
> | work                                                         private |
> | My employer is capable of speaking therefore I speak only for myself |
> +----------------------------------------------------------------------+
> | Technical questions sent directly to me will be nuked. Use the list. |
> +----------------------------------------------------------------------+
> | http://faq.mrtg.org/                                                 |
> | http://rrdtool.eu.org  --> tutorial                                  |
> +----------------------------------------------------------------------+
>
> --
> Unsubscribe mailto:mrtg-request at list.ee.ethz.ch?subject=unsubscribe
> Archive     http://www.ee.ethz.ch/~slist/mrtg
> FAQ         http://faq.mrtg.org    Homepage     http://www.mrtg.org
> WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi
>


--
Unsubscribe mailto:mrtg-request at list.ee.ethz.ch?subject=unsubscribe
Archive     http://www.ee.ethz.ch/~slist/mrtg
FAQ         http://faq.mrtg.org    Homepage     http://www.mrtg.org
WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi