[mrtg] Re: Spikes

[Graham King]

I too get spikes sometimes when a device, monitored by MRTG using RRD,
has
been rebooted.

Am I right in thinking that any interface can show spikes when the
monitored
Device is reset, because the traffic counts will start again at zero and
MRTG just thinks there's been a lot of traffic and the counters have
wrapped round? If the resulting difference is less than MAXBYTES the you
get a spurious spike on the graph. If so, it would be nice to have an
option that ignores data readings where this reading is less than the
previous one, or maybe check the devices uptime?

Graham King
Kingston University
UK

-----Original Message-----
From: mrtg-bounce at list.ee.ethz.ch [mailto:mrtg-bounce at list.ee.ethz.ch]
On Behalf Of Paul C. Williamson
Sent: Sunday, January 20, 2002 9:48 PM
To: kth at hp.is; mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: Spikes


I think there's a script called "killspike" in the 
contribs to do just this.

Paul

>>> "Kristjan Thordarson" <kth at hp.is> 01/20/02 09:40 AM >>>

Hi, I get BIG spikes in my graphs when I reload a Cisco 3640 with an ATM
interface.  All atm sub interfaces show this spike right after a reload
(or perhaps during reload).  I'm using rrdtool, is it possible to "edit"
these out or somehow work around this?

Regards,

Kristjan


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