[mrtg] False Alarms

[bwoodcoc]

Hello,

We had an occurrence yesterday which, after post evaluation, indicates mrtg 
did not handle threshold alarms as I would have hoped. I searched the 
archives but did not find a reference to this issue so please forgive if I 
missed it.

When a router becomes unavailable, the first poll thereafter I receive 
utilization and/or congestion error alarms on all (or many) of it's 
interfaces. In fact the values are more often then not unrealistic upon 
close inspection of the speed. On the second poll they clear (unless 
connectivity is flapping). Bug?? In our case we have a site with several 
routers behind a firewall which became unavailable. The barrage of mrtg 
alarms for a flapping site confused us to no end. In fact it led us astray, 
a bit of a sin in my book so hopefully there is a fix/option of some sort.

Are there any options which could be set? UnKnAsZero was a thought. But 
what would happen if we had a *real* utilization/congestion issue causing 
intermittent connectivity? Would this option force an alarm clear when we 
actually would want to see the condition?

I'm running 2.9.17 with rrd.

Thanks in advance for your inputs.

cheers,
woody...

--
Unsubscribe mailto:mrtg-request at list.ee.ethz.ch?subject=unsubscribe
Archive     http://www.ee.ethz.ch/~slist/mrtg
FAQ         http://faq.mrtg.org    Homepage     http://www.mrtg.org
WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi