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PRTG measuring traffic volume either by half or double

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I'm using traffic sensors on my Zyxel switches. In the graph below

https://i.imgur.com/5CnC6Co.png

I was transferring some large files from Server 1 to Server 2, going through 4 switches. I have these sensors set for vertical scaling. Switch 1 and 4 max out at 1000000 kbit/s, and Switch 2 and 3 max out at 500000 kbit/s.

The graphs match up but the speeds do not. And it's not the vertical scaling doing it because if I put switch 2 and 3 to 1000000 kbit/s like the others the graph reduces by half.

Below is the data from the beginning of the file transfer

https://i.imgur.com/vSRC1Ti.png

You can see that the trunk ports between switch 1 and switch 2 show a difference of about half.

So my question is does anyone know why this is happening? Which one is correct? And is it possible to fix?

prtg snmp-traffic snmptrafficsensor

Created on Mar 7, 2019 1:15:41 PM by  dreniarb (10) 1



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Hi dreniarb,

Please clarify your second screenshot (with the tables) in detail. So that we can identify the important values more easily.

Thank you in advance!

Best Regards,
Moritz Heller
Paessler Support Team

Created on Mar 8, 2019 1:04:36 PM by  Moritz Heller [Paessler Support]



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My apologies. Hopefully this makes a bit more sense.

https://i.imgur.com/VsJZnkn.png

Created on Mar 8, 2019 1:30:24 PM by  dreniarb (10) 1



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Hi dreniarb,

Please provide these additional information:

  • Screenshot of the "Vertical Axis Scaling"
  • Where did you "put switch 2 and 3 to 1000000 kbit/s" in PRTG or your target device?
  • Historic Data from 03.05. 12:10-12:40

Furthermore, please send these information via email to [email protected] and refer to the Case "PAE1168424".

Thank you in advance!

Best Regards,
Moritz Heller
Paessler Support Team

Created on Mar 11, 2019 7:24:35 AM by  Moritz Heller [Paessler Support]



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