Hi,

In an attempt to fix the issues I mentioned a few days ago, I am trying to 
validate the theory that nprobe and/or ntopng are doubling up flows due to 
certain traffic (not all traffic) passes through our equipment twice on 
different VLANs. When looking at the flows in ntopng, I see two flows for 
everything. They only difference is the VLAN; source IP, dest IP, packets, 
bytes, speed, etc are all identical as expected.

Some posts online suggest there are ways to ignore VLANs and I have tried the 
following.

In /etc/nprobe/nprobe.conf:
-p=0/1/1/1/0/0/0

In /etc/ntopng/ntopng.conf:
--ignore-vlans=

Perhaps the options don't function as I assumed they would. At any rate, the 
end result is that ntopng still shows duplicate flows and the list under Hosts 
-> VLANs continues to populate with data.

Here are the entire nprobe and ntopng configuration files. I am not able to 
spot a typo such as a missing '=' that would might cause a line to be 
interpreted as the option to the line right above it. Maybe I've overlooked 
something.

nprobe.conf
-i=none
-n=none
-3=2055
--zmq=tcp://127.0.0.1:5556
-T="@NTOPNG@"
-V=9
--idle-timeout=30
--lifetime-timeout=600
--disable-cache=
--enable-ipv4-deduplication=
--verbose=1
-p=0/1/1/1/0/0/0
--local-networks=10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,208.118.68.0/24,208.118.95.34/32
--local-traffic-direction=

ntopng.conf
-G=/var/run/ntopng.pid
-i=tcp://127.0.0.1:5556
--local-networks="10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,208.118.68.0/24,208.118.95.34/32"
--ignore-vlans=


Thanks,
Gerard Beekmans
Sr. Network Engineer
First Nations Technical Services Advisory Group Inc.
Phone: 780-638-2739
Fax: 780-483-8632
Helpdesk: 1-888-999-3356
Email: [email protected]<mailto:[email protected]>
Santa Fe Plaza
18232 - 102 Avenue NW
Edmonton, AB T5S 1S7
http://www.tsag.net<http://www.tsag.net/>

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