There is a five (5) minute minimum interval that bandwidth can actually be polled. If you change the Nagios check to use a shorter interval, it will not have any real effect. This is because bandwidth is pulled and calculated by MRTG at five minute intervals. The interval is controlled through a cron job. If you want to edit that, the cron job entries can be found in:
There is some info on the net about changing MRTG to use a shorter interval. Recent versions of MRTG might be able to support an interval < 5 minutes, so the link below may no longer have required information. We haven't tried this, but the following might be helpful if you decide to make this change:
Note that you will likely see a performance hit from this, especially if you're monitoring several switches. There's a pretty high I/O cost to constantly updating RRD files.
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Its been a while since I looked at the demo of nagiosxi due to other work isuses. The demo has now expired so cant check anything on it but would like to get this product in here at work.
Does anyone know if the port name issue has been looked at and fixed or not .
It was mentioned to download and patch a wizard but im not sure on how to do that.
The other question was about the polling times. I never did get it to work a 1 min intervals. The performance graphs etc would do 1 min put port usage on a cisco switch for example only does 5 mins. I've looked at the links posted by admin above but as it says in them mrtg cant do less that 5 mins on its own, you need rrd running, is these even possible on nagiosxi and ifd so how would you do it.
If anyone could help with this as I would like the get the product in here but need to fix these.
