Units incorrect

[wlolato]

Hi,

My graph on grafana displays units in Tbps, that is incorrect.

PRTG displays correct traffic in Mbits/S

What can a fix to resolve this ?

Thanks.

[ktngoykalolo]

Hi, any update on this ? I have the same issue

[Zxurian]

It looks like the response from PRTG may be off? This is the raw XML received by grafana from pinging PRTG:

   <item>
    <datetime>6/25/2018 12:10:14 PM</datetime>
    <datetime_raw>43276.6737732870</datetime_raw>
    ...
    <value channel="Traffic In (volume)" channelid="0">32 MByte</value>
    <value_raw channel="Traffic In (volume)" channelid="0">33635451.0000</value_raw>
    <value channel="Traffic In (speed)" channelid="0">0.90 Mbit/s</value>
    <value_raw channel="Traffic In (speed)" channelid="0">112118.1700</value_raw>
    <value channel="Traffic Out (volume)" channelid="1">85 MByte</value>
    <value_raw channel="Traffic Out (volume)" channelid="1">89027133.0000</value_raw>
    <value channel="Traffic Out (speed)" channelid="1">2.37 Mbit/s</value>
    <value_raw channel="Traffic Out (speed)" channelid="1">296757.1100</value_raw>
    ...
    <coverage>100 %</coverage>
    <coverage_raw>0000010000</coverage_raw>
   </item>

the volume channel matches up to it's raw, but the speed channel doesn't look like the calculations are matching up.

If I view the sensor directly on PRTG, and view the table as XML, the raw value shown matches what is received by Grafana. so the problem might be with PRTG?

[tehSMK]

They Problem lies within the value_raw format. It is returned as bytes instead of bits. So what happens is that there is some calculation between value_raw and value.

when you look at the values from above this post:

2.37 Mbit/s

<value_raw channel="Traffic Out (speed)" channelid="1">296757.1100</value_raw>

296757 bytes/s / 1000 / 1000 =~ 0.297Mbytes/s

Now multiply by 8 0.297Mbytes/s * 8 =~ 2.37MBits/s

Don't know why this is done this way. So its a "problem" of PRTG instead of Grafana(Plugin)

Hope this is understandable :D

[hungdohuy]

Hi,

I notice the same issue here, On PRTG:

But on Grafana:

Max on PRTG is 10,450 kbit/s Max on Grafana is 1153615 so as from comment of tehSMK, is it possible to convert it to bits?

[biloriaj]

How could we solve this issue? I am having the same problem when I pull out the data from the PRTG and try to graph in the Grafana. Any comments that it could help to overcome this issue or any workaround?

[tehSMK]

there is a multiplier field in the grafana dashboard when you choose PRTG Datasource on the metrics tab.

[biloriaj]

Hi, TehSMk. I could not find any field, could you please share more details about this? Thank you in advance. Jesus Viloria

[tehSMK]

@biloriaj you should have an option when you select your datasource.

[biloriaj]

Hi, TehSMK. Thank you for your comments. unfortunately, I do not have the option, please take a look:

[biloriaj]

guys! any comments about this issue I am having, thanks in advance. Jesus Viloria

[neuralfraud]

Prtg bandwidth values are in Bytes/s.

The dev branch has a feature which allows you to specify a multiplier for the data if you wish to scale it down to bits, kbytes, etc.

Sent from my iPhone

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guys! any comments about this issue I am having, thanks in advance. Jesus Viloria

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[RamiroCarlos]

Hi, thanks for your work, it definitely helped us to solve the problem, cuted the work in half. We fixed the units in (data rate) bits/sec(SI) ignoring the raw values that are in Bytes, next we Transform the value from Bytes to Bits throught the multiplication of 8