Re: mrtg : option when mrtg cannot reach the targeted device

Darren Murphy <[email protected]> Wed, 30 Nov 2016 18:33:21 +0800

Newsgroups	gmane.network.mrtg.user
Message-ID	<CAJYt4JsGz=nZihiHR_-Dnve-_wMUqZjT_n9ffVA3P0MVAFy-cQ@mail.gmail.com>

On 29 November 2016 at 16:27,  <[email protected]> wrote:
> Hello,
>
> Does someone can explain what are the configuration options when mrtg cannot
> reach the target ?
>

If MRTG cannot reach the target, then there will be no data for that
polling cycle.
The default behaviour in this case is to repeat the last value.
If this is not desirable, then the 'unknaszero' option may be used,
which will cause MRTG to log all unknown values as zero.

So essentially, there are two options:

1. Repeat the last known value
2. Log as zero

See http://oss.oetiker.ch/mrtg/doc/mrtg-reference.en.html

cheers,
Darren