[mrtg] Monitoring a target only during certain hours

Daniel McDonald dan.mcdonald at austinenergy.com
Fri Jan 7 14:48:43 CET 2011

On 1/6/11 5:40 PM, "Geoff Powell" <geoff at g8kbz.demon.co.uk> wrote:

> I have an MRTG installation running here on my home network.
> MRTG version is 2.10.13, running in rateup mode from cron
> My ISP places a download limit of 200GB on a 30-day rolling average, and
> I've worked out a way to handle that, but they recently added a clause
> "we will not count data transferred between the hours of midnight and 8
> a.m.".
> Does anyone have an idea of how to implement this?

Exclude those hours from the crontab entry, and use unknownaszero so that
the non-polled intervals are not interpolated.

A second method would be to switch to rrdtool, use Routers2.cgi, and set the
worktime options appropriately.

Daniel J McDonald, CCIE # 2495, CISSP # 78281

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