Hi Simone,

Here the ntopng and nNrobe configuration used.

Ntopng:
--interface eth0
--interface tcp://127.0.0.1:5556
--local-networks 172.22.9.0/24,192.168.0.0/16,172.22.0.0/16,10.0.0.0/8
--daemon
--user ntopng
--pid /var/run/ntopng/ntopng.pid
--http-port 0
--https-port :3001
--data-dir /var/lib/nst/ntopng
--dns-mode 1
--disable-autologout
--disable-login 0
--sticky-hosts none
--http-prefix /ntopng
--ndpi-protocols /etc/ntopng/protos.txt

nProbe:
/usr/local/bin/nprobe -i none -n none --zmq tcp://*:5556 -b 2 -3 6343 
--online-license-check 
--as-list=/usr/share/ntopng/httpdocs/geoip/GeoIPASNum.dat 
--city-list=/usr/share/ntopng/httpdocs/geoip/GeoLiteCity.dat -G --pid-file 
/var/run/nprobe/nprobe.pid -V 9 --disable-cache --zmq-disable-buffering

I don't know if I can attach pictures to this message to explain what I mean by 
saying that my collector ntopng return sflow to the remote Meraki device.

Traffic from my collector IP is almost 100% sent and when I check the Protocol 
detail, it show that it's sFlow (Sent 100%) to my remote Meraki device under 
the Peers tab!

Gerhard,


> On May 17, 2018, at 3:53 AM, Simone Mainardi <maina...@ntop.org> wrote:
> 
> Gerhard,
> 
> Can you enclose nProbe and ntopng configurations used as well as an example 
> of what you mean with 'my collector return the flow to the Meraki device'?
> 
> Thank you
> 
>> On 16 May 2018, at 19:59, Gerhard Mourani <gmour...@prival.ca> wrote:
>> 
>> 
>> Hello,
>> 
>> I've activated Netflow v9 on Cisco Meraki and receive flow on nProbe (v 
>> 8.2.171206-5975) correctly. The problem is that my collector (ntopng v 3.2) 
>> return the flow to the Meraki device and I don't understand why? This 
>> generate lot of data in our case ~1TB per hour for sflow!.
>> 
>> Regards,
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