[mrtg] Re: Threshold monitoring

[Kerry Werry]

This should be possible with the basic threshold options. You have min
and max threshold options, so set both for one interface say a max of
70% and a min of 10% and you will bet alarms when you go above the max
9and back below it) and below the min (and back above it)... I think
that does what you want???


Kerry L. Werry
604-699-8087 (office)
604-762-1293 (cell)
-----Original Message-----
From: Keith McCallion [mailto:keith at mccallion.com] 
Sent: Thursday, February 12, 2004 11:52 AM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Threshold monitoring


Has anyone hacked the threshold monitoring to catch large changes in
values? For instance, I use maximum threshold monitoring to catch when
my circuits are above 80% utilization. I would also like to see when my
circuits have large swings in utilization, which usually indicates
something weird going on (DoS, another circuit failure, bad BGP
announcements, device going down, etc).

This is especially useful for those of us with huge traffic variances
between peak and trough. A have interfaces that might be 75% utilized in
the evening and only 5% utilized at 3am. I need something to catch large
drops (or spikes) in traffic at peak without sending out false alerts
every night.

Has anyone written such a monitor, or is this something I need to put
together on my own?


Keith

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