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Downtime channel use



I do not understand the downtime channel of the ping sensor. My router is on the same switch as my server hosting PRGT. The average ping time is 2ms but I show a downtime average of about 10.5ms. My graph for this is full of red lines which seem to sit on top of the green, indicating no non-responses from ping.

I have another site which I connect via VPN and am also monitoring. That router shows a downtime average of 2.7ms with an average response time of 13ms.

If I am having communications issues with my local router, then my remote should be worse. What is the downtime showing me?


alerts channel sensor

Created on Sep 20, 2013 8:56:24 AM

3 Replies




thank you very much for your KB-Post. May I ask, for a better understanding, could you please upload some illustrating screenshots showing the issue? Thank you.

best regards.

Created on Sep 23, 2013 9:04:00 AM by  Torsten Lindner [Paessler Support]



Asking me to post images seems like that would become another issue, I don't understand how to do that on this board. If you look at a sensor setup for Ping Time there are two channels: Downtime and Ping Time. If you look at graphs, there are two lines with different colors; red for downtime % and green for ping time (msec). My graphs for a two day shows almost equal red and green lines. Ping times lines spike between .0 and .7, which I can understand. Downtime lines from 0 to 100%, most are around 50%, which I don't understand. Furthermore, looking at the 5 minute table there are 3 columns: Ping Time; DownTime and Coverage. At 7:25 - 7:30 I see: 0 msec, 0% and 100%. At 7:30 - 7:35 I see 0 msec; 19% and 100%. This entry has a red highlight on it. How can I have only a 19% downtime and 100% coverage for one 5 minute period without my network really being down? Hope this helps explain things better.

Created on Sep 23, 2013 1:29:22 PM



You can also send the images via email to us.

Created on Sep 24, 2013 9:31:47 AM by  Torsten Lindner [Paessler Support]

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