6 switches have one fw and 2 older fw one of them had no spikes.

I cant find any anomalies in network or logs which would cause such spikes. I was using 8 cronjobs for poller. I switched back to one now. No spikes so far. Could that have been the case?

I used cronjobs like mentioned in docs.

*/5 * * * * root /opt/observium/poller.php -i 8 -n 0 >> /dev/null 2>&1

*/5 * * * * root /opt/observium/poller.php -i 8 -n 1 >> /dev/null 2>&1

*/5 * * * * root /opt/observium/poller.php -i 8 -n 2 >> /dev/null 2>&1

*/5 * * * * root /opt/observium/poller.php -i 8 -n 3 >> /dev/null 2>&1

*/5 * * * * root /opt/observium/poller.php -i 8 -n 4 >> /dev/null 2>&1

*/5 * * * * root /opt/observium/poller.php -i 8 -n 5 >> /dev/null 2>&1

*/5 * * * * root /opt/observium/poller.php -i 8 -n 6 >> /dev/null 2>&1

*/5 * * * * root /opt/observium/poller.php -i 8 -n 7 >> /dev/null 2>&1

Now using one poller

*/5 * * * * root /opt/observium/poller.php -h all >> /dev/null 2>&1

From: observium [mailto:observium-bounces@observium.org] On Behalf Of Adam Armstrong
Sent: Tuesday, May 7, 2013 11:37 AM
To: Observium Network Observation System
Subject: Re: [Observium] Getting wierd spike graph

Its not obvious what the problem is.

The spikes seem to be evenly spaced, which is odd.

Its likely either a bug in the switch SNMP stack which is returning zero or referring to the 32bit counters, or a network congestion issue caused by a crown job.

Do all of the devices have the same software versions?

Adam.

Kristjan Hinn - PERH <Kristjan.Hinn@regionaalhaigla.ee> wrote:

Hello,

Im having trouble graphing Avaya ERS5530 switches. Graphs generated have very wierd spikes of ~700 Gbps what is impossible.

I have other switches drawing graphs just fine. And to get this even more wierder one of my eight Avaya ERS5530 is drawing graphs just fine.

Picture of the problematic graph: https://dl.dropboxusercontent.com/u/41978197/observium/xtuum1.JPG

Has anyone got any idea what could case this?

BR,

Kristjan Hinn