Grafana Graph not showing the same bandwidth as PRTG

Grafana Configuration
1
  • What Grafana version and what operating system are you using?

10.2 on Windows Server

  • What are you trying to achieve?

Time Series Graphs from PRTG

  • How are you trying to achieve it?

Using PRTG Plugin, on a windows cloud server with Grafana 10.2

  • What happened?

I have managed to get the time series graph, but the data rate (bandwidth) does not match what PRTG is showing.

  • What did you expect to happen?

Grafana time series graph to show the same bandwidth as PRTG

  • Can you copy/paste the configuration(s) that you are having problems with?
    response:"<?xml version=\"1.0\" encoding=\"UTF-8\"?>

    <histdata totalcount="180" listend="1">

    20.4.64.1402

    12/3/2023 6:05:11 AM

    <datetime_raw>45263.2536047569</datetime_raw>

    <value channel="Traffic IN (volume)" channelid="2">31 MB

    <value_raw channel="Traffic IN (volume)" channelid="2">32537436.0000</value_raw>

    <value channel="Traffic IN (speed)" channelid="2">4.34 Mbit/s

    <value_raw channel="Traffic IN (speed)" channelid="2">542742.8857</value_raw>

    <value channel="Traffic OUT (volume)" channelid="3">2.87 MB

    <value_raw channel="Traffic OUT (volume)" channelid="3">3012671.0000</value_raw>

    <value channel="Traffic OUT (speed)" channelid="3">0.40 Mbit/s

    <value_raw channel="Traffic OUT (speed)" channelid="3">50253.0609</value_raw>

    100 %

    <coverage_raw>0000010000</coverage_raw>

  • Did you receive any errors in the Grafana UI or in related logs? If so, please tell us exactly what they were.

No Errors, i have set the “Unit” to Bits/sec (SI)

2

Welcome @ifinnan

Maybe prtg has been wrong all these years :scream::scream::scream:

Can you do a sample manual check for a specific time span data?

3

Hi, the PRTG data is correct for bandwidth, that has been verified.

I can get specific times spans, the graphs look exactly the same between PRTG and Grafana, its just the Axis is showing the incorrect data, i have adjusted the Unit but it doesnt make any difference, i think i need to do some math to convert it, but i dont see any options for that.

Thanks for your help

4

Actually they look identical just a bit more compressed in PRTG hence showing more time series in PRTG.

image
image1544×531 125 KB

5

Hi,

Yes exactly, the graphs are the same, but the actual values they show are not.

PRTG shows the value in Mbit/s and Grafana is kb/s

I have tried changing the unit in Grafana but it just changes the graphs to Mbit/s but the graph changes automatically to Gb/s

It seems i have to do some calculation setting for *8 or /8 to get the correct value but i dont see any option for that.
BOTH

1 Like
6

image
image1105×345 33.7 KB

Standard Options has mb/s

7

Thanks,
This is the option when i select it it changes the bandwidth to Gib/s, the router i am monitoring is constatly using 4.5 Mbps, and the PRTG graph displays that amount, but not Grafana.

standard

8

Hi,

Checking this thread, was the issue resolved? If so, please someone enlighten how as I am facing the similar issue. I see correct bandwidth on the newtwork device and PRTG dashboard but Grafana shows different numbers. I have tried different data rate settings yet nothing close.