We are licensed for PRTG-1000 - but we recently asked for, and have received, a demo license so we could advocate for consolidating all monitoring in our local data center to PRTG. The last version we downloaded and installed before we applied the demo license is:
PRTG Network Monitor 126.96.36.1990
Our problem is that we are seeing some very weird behavior on one of our SNMP Bandwidth monitors... about every 40 minutes or so, we will see the Inbound traffic drop to 0... which seems impossible as this is our Internet router. Our regular business hours traffic is close to 16-20 mbps, but every 40 minutes, we will get a 1-minute interval reading of 0 on the interface directly connected to our ISP.
For testing - I setup another monitor for this same device in another group to see if we would get the same results, and they are almost identical... the specific timing of the SNMP query being off by a few seconds only.
I also have access to another PRTG install at one of our corporarte remote locations, and they are also monitoring this same router and interface. However, they do not show any 1-minute intervals with 0 bits transferred. The version of PRTG they are using is:
PRTG Network Monitor 188.8.131.521
I am curious if there is a bug in the version we are currently using (184.108.40.2060), as I can reproduce the error under this version, but not on the older version.