[mrtg] Re: Alert on No Response

[jrb]

Garth,

By "when a device fails to respond to MRTG" I meant when a device times-out
or MRTG fails to read the SNMP data for any reason.  I like your idea,
although there's a small chance that a separate SNMP query could succeed and
MRTG could still fail.

Regarding your 'doubling-up' question, I'm not so much interested in testing
each OID.  I'm more concerned with knowing when an MRTG run failed to read
any of the polled data.  Essentially, I was hoping for a way to test MRTG's
return value and respond if the run was not a complete success.

Thanks for the feedback,
jrb


----- Original Message -----
From: "Williams, Garth" <gkwilliams at epcor.ca>
To: <mrtg at list.ee.ethz.ch>
Sent: Tuesday, July 16, 2002 10:12 AM
Subject: [mrtg] Re: Alert on No Response



I have been following this thread with some interest.

What is meant by "No MRTG response"?

Most of the time, MRTG takes advantage of the SNMP_Util module to query the
intended target, right?

So, why not write a small SNMP query before MRTG scan and if fail, send an
email or somrthing?

For example, before I start my MRTG run, I PING the target.  If it fails,
then I send an email and move onto the next target.  Etc., etc.  Works
great!

If I were doing it via SNMP, then I would use the SNMP_Util module, and
query the sysDescr or sysObjectID value, and make sure I get a valid return
(i.e. not 0 or undef).

Beyond that seems to me that you would be doubling up on the query if you
were to test each target OID before MRTG was.

... Or am I way out in left field?

> Hi everyone.
>
> I have a question that I thought would be common, but only shows up in the
> archive a couple times with no responses.  What I'd like to do is call a
> shell script when a device fails to respond to MRTG.
>
> Any suggestions you can offer would be much appreciated.
>
> -jrb
>
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