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Strange spike in bandwidth speed and usage



From 4am to 5am on 9/18/2013 PRTG says i used 13GB of bandwidth?

My max speed from my ISP is only 7000Kbps

There is no way I can download 13GB in one hour its not possible

Here is were i see the spike


This is a link to the raw data from 4:24 am to 4:31am 9/18/2013

It's just a simple text file be sure to look at it with word wrap off.

bandwidth-monitor prtg-network-monitor spikes

Created on Sep 18, 2013 8:26:59 PM

6 Replies




thank you very much for your KB-Post. Can you please upload a screenshot showing this? Do you know if SNMP v2c or SNMP v1 is used?

best regards.

Created on Sep 19, 2013 2:24:09 PM by  Torsten Lindner [Paessler Support]



Here is a screen capture of the event in question


Created on Sep 19, 2013 3:24:50 PM

Last change on Sep 19, 2013 5:43:10 PM by  Torsten Lindner [Paessler Support]



Do you know if SNMP v2c or SNMP v1 is used? You can check this by simply adding the sensor again, with the parent device set to use SNMP v2c. And then compare the volumes for at least full hours between the old and the new sensor. This might be a simple overflow issue here.

Created on Sep 19, 2013 5:44:24 PM by  Torsten Lindner [Paessler Support]





Created on Sep 19, 2013 9:44:21 PM



I have the option to go to v3 or v1 should i stick with v2c?

Created on Sep 19, 2013 9:46:46 PM



SNMP v2c should be fine. Did you try adding the sensor again? Please check, if during the adding process the "problematic" interface is listed as "64 bit" counter.

Created on Sep 20, 2013 7:34:55 AM by  Torsten Lindner [Paessler Support]

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.