New Question
 
 
PRTG Network Monitor

Intuitive to Use.
Easy to manage.

200.000 administrators have chosen PRTG to monitor their network. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free PRTG
Download >>

 

What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general. You are invited to get involved by asking and answering questions!

Learn more

 

Top Tags


View all Tags


Last Up, Last Down Confusing

Votes:

0

Your Vote:

Up

Down

Dear Support,

Would you please explain the following?

Status: Up (Downtime: 1h 27m)

Last Up: 25.05.2015 09:01:10 (0 s ago)

Last Down: 25.05.2015 09:00:49 (21 s ago)

last-sensor-state prtg timestamp

Created on May 25, 2015 2:58:09 AM by  darren_shei (0) 1



12 Replies

Votes:

0

Your Vote:

Up

Down

The sensor had a scan result that represented a down state 21 seconds ago, and in the last scan (0 seconds ago), it was up again. Last up is usually equal to last scan, when the sensor is still up. The combined downtime of the sensor is 1h 27m.

Does that explain it? :)

Created on May 26, 2015 9:19:25 AM by  Stephan Linke [Paessler Support]

Last change on May 26, 2015 9:19:43 AM by  Stephan Linke [Paessler Support]



Votes:

0

Your Vote:

Up

Down

Hi Support, I'm sorry that I still don't get it. Here's the situation. The first email notification that I received is:

Status Down Date/Time 26.05.2015 17:18:00 Last Up 26.05.2015 17:13:14 [4 m 45 s ago] *what does 4m45s mean? Last Down 26.05.2015 17:16:25 [94 s ago]

Second email:

Status Up (Downtime: 108 s) * how do we get 108s? Date/Time 26.05.2015 17:19:14 Last Up 26.05.2015 17:19:14 [0 s ago] Last Down 26.05.2015 17:18:14 [59 s ago]

Would you please explain? Thank you very much!

Created on May 26, 2015 9:33:53 AM by  darren_shei (0) 1



Votes:

0

Your Vote:

Up

Down

Could you provide us with a screenshot of the sensors historic data table?

Created on May 27, 2015 6:14:56 AM by  Stephan Linke [Paessler Support]



Votes:

0

Your Vote:

Up

Down

Please advice on how to attach screenshot here?

Created on May 27, 2015 6:22:11 AM by  darren_shei (0) 1



Votes:

0

Your Vote:

Up

Down

{{http://imageurl|Image description}} :)

Created on May 27, 2015 7:20:32 AM by  Stephan Linke [Paessler Support]




Votes:

0

Your Vote:

Up

Down

Image description Image description

Created on May 29, 2015 12:44:37 AM by  darren_shei (0) 1



Votes:

0

Your Vote:

Up

Down

Well, it adds up, doesn't it? I'm not sure where the exact problem is :(

Created on May 29, 2015 10:49:38 AM by  Stephan Linke [Paessler Support]



Votes:

0

Your Vote:

Up

Down

Hi Stephan, May I know how do we get Downtime: 108 s?

Thanks

Created on Jun 1, 2015 1:41:43 AM by  darren_shei (0) 1



Votes:

0

Your Vote:

Up

Down

Hi Darren,

That's the amount of time the sensor has been down since the last down notification, i.e. the duration of this very down state.

Created on Jun 1, 2015 2:04:24 PM by  Stephan Linke [Paessler Support]



Votes:

0

Your Vote:

Up

Down

Image description

Image description

Hi Stephan,

In this case, last down was 23:00:52 and last up was 23:02:07.

The downtime supposed to be 1 m 15 s, right?

But the screenshot shows Downtime: 4 m 1 s.

May I know where did I get wrong? Thanks!

Created on Jun 2, 2015 9:02:57 AM by  darren_shei (0) 1



Votes:

0

Your Vote:

Up

Down

Hi Darren,

Depends on the scanning interval of the sensor. Can you send me a screenshot of the sensors historic data tab with the time and date where the sensor was down? It should be visible how long it was down and if the state was flapping.

Best, Stephan

Created on Jun 4, 2015 9:49:49 AM by  Stephan Linke [Paessler Support]



Please log in or register to enter your reply.


Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.