A few times a week I'll get emails from PRTG stating one of my netflow sensors has dropped data (Code: PE082). I have my Cisco router configured with an active timeout of 5 minutes and the sensor configured for 6, as recommended. Something to note about this setup is that the router is sending the netflow packets over the WAN to the PRTG server. From my research that didn't seem to be discouraged, but who knows?
This remote router was recently setup to export flows and ever since I have been getting these messages. For the last year or so I've had another router local to the PRTG server exporting flows without issue. Each of these routers has 2 netflow sensors, so 4 in total. I don't think this is a matter of the server not being able to keep up. Processor is generally below 10%.
The second part of this issue is on the remote router I'm seeing erratic results in the form of bandwidth numbers being far too high. It will report 17 Mbps usage when that router only has 3 Mbps via 2 bonded T1s. A few erratic results like this completely skew the scaling of the graphs and make them unusable. Any idea why this is happening?