[mrtg] Re: Alert on No Response

Williams, Garth gkwilliams at epcor.ca
Tue Jul 16 17:12:13 MEST 2002

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

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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