As part of my evaluation of PRTG as my organization's future network monitor I am using the web interface on PRTG version 16.2(the new trial version) to try to determine the downtime of some network interfaces and I'm unsure how to interpret the results I am seeing.
On one hand I have log messages that are printed with specific timestamps and the status of the sensor. See this info below.
5/5/2016 3:04:08 PM Up
5/5/2016 3:03:23 PM Down
5/5/2016 3:02:23 PM Warning
On the other hand I go to the historic data and for the same sensor and the same time period the information is as follows:
SENSOR STATUS HISTORY
Up - 5/5/2016 1:24:53 PM − 5/5/2016 3:07:38 PM (=1 h 42 m)
In other words the historic data seems to show that there was not a Down event in the same time period that log messages were recorded showing the same sensor being down.
I can certify that the sensor was down because I disconnected the cable from the physical device.
Log messages show the sensor as being down for at least 45 seconds from 5/5/2016 3:03:23 PM to 5/5/2016 3:04:08 PM.
My questions are:
Why doesn't the event show in the historic data report generated in HTML format?
Am I missing something?
Is there a minimum time threshold that an event needs to pass before being reported as a true down event?
if so, what is that time interval for a sensor of type SNMP Traffic 64bit sensor?
Thanks in advance,