Robert,

From the picture enclosed, it seems you are using ntopng to capture from a 
physical interface -- ens192.

As you've said your scenario is:

Cisco L3 Device ——>>>>>netFlow collector (acting as a proxy/forwarder) ——>>>>> 
nProbe——>>>>>NTOPNG

So you have to connect ntopng and nprobe together via ZMQ to see the actual 
content of flow records. See 
https://www.ntop.org/guides/ntopng/using_with_other_tools/nprobe.html 
<https://www.ntop.org/guides/ntopng/using_with_other_tools/nprobe.html>

In particular, you have to use option --collector-port to tell nProbe on which 
port the netflow arrives.


Regards,

Simone



> On 17 Jun 2020, at 22:42, Robert Racioppoli <[email protected]> 
> wrote:
> 
>  
> Hi Simone,
>  
> Are there special settings/commands required on NTOPNG or nProbe to allow 
> this to happen ?  To better explain our current setup,, the communication 
> between the proxy Flow Collector (10.177.45.18) and nProbe is established and 
> can  be  seen in NTOPNG (see item #1 ).  The issue is that the actual Flow 
> record information or if you prefer the Flow dataset does not appear in 
> NTOPNG.
>  
> No individual router conversation flow can be seen.
>  
>  
>  
> Grazie mille.
>  
> Robert
>  
> Item #1
>  
> <image001.png>
>  
>  
> Here is a small sample of the expected flows as seen by another solution.
>  
> <image003.jpg>
>   
>  
>  
>  
>  
> Robert Racioppoli
>  
> Conseiller Technique Senior en Télécommunications - Surveillance Réseau
> Senior Technical Advisor - Telecommunications - Network Monitoring
> 2020  Robert Bourassa
> Montréal QC
> H3A 2A5
> Canada
> [ intact ] Corporation financière
> Téléphone : (866)  440-8300  x61257
>  
>  
> [email protected] <mailto:[email protected]>
>  
>  
> De : [email protected] <[email protected]> De 
> la part de Simone Mainardi
> Envoyé : 17 juin 2020 15:57
> À : [email protected]
> Cc : [email protected]; Michel Labrecque <[email protected]>
> Objet : [E!] Re: [Ntop] nProbe modes
>  
> Robert,
>  
> Yes, nProbe can be on the receiving end of an alternative Flow Collector - 
> provided that the alternative Flow Collector is exporting NetFlow 
> v5/v9/IPFIX/sFlow or any other format which is interoperable with them.
>  
> Regards,
> Simone
> 
> 
> On 17 Jun 2020, at 19:18, Robert Racioppoli <[email protected] 
> <mailto:[email protected]>> wrote:
>  
> Hello,
>  
>  
> Your documentation clearly describes a scenario where nProbe can act as a 
> flow proxy/collector.  My question is  can nProbe be on the receiving end of 
> an alternative Flow Collector acting as a proxy/forwarder ?
>  
>  
>  
> Thank You!
>  
>  
>  
>  
>  
>  
> Robert Racioppoli
>  
> Conseiller Technique Senior en Télécommunications - Surveillance Réseau
> Senior Technical Advisor - Telecommunications - Network Monitoring
> 2020  Robert Bourassa
> Montréal QC
> H3A 2A5
> Canada
> [ intact ] Corporation financière
> Téléphone : (866)  440-8300  x61257
>  
>  
> [email protected] <mailto:[email protected]>
>  
>  
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