> On 12 Feb 2018, at 22:06, Peter Shute <psh...@nuw.org.au> wrote:
> Thanks for that. I've also discovered I can separate out the netflow data
> coming from each office's router using dynamic network interfaces. I followed
> the instructions provided at https://github.com/ntop/ntopng/issues/1444 to
> enable Probe IP disaggregation criterion, and to add %EXPORTER_IPV4_ADDRESS
> to the template. I assume this does the same thing as host pooling, assuming
> one wants to pool every subnet on each router?
> I have this running now, so I can't try creating host pools unless I undo
> those changes.
> One thing I've noticed with dynamic interfaces is that if I select one, then
> click on the chart icon, the traffic peaks seem way too high. Eg 85Mbps when
> we only have a 14Mbps link.
Peaks you are seeing are very likely due to the quantized nature of flows. Your
netflow exporters do periodic exports of active flows -- say every 2 minutes --
so the ntopng/nProbe pair is not able to know what happened during the 2
minutes, it just receives the exported flow at the end of the period. This
translates into a potentially high volume of traffic in a very short period
that determines the peak. However, total values over time must be consistent.
> If I click on Hosts/Networks, and select one of the local subnets, it seems
> ok. Is there something wrong with that combined chart?
Interfaces charts are populated with a data point every second. Hosts/networks
every 5 minutes and thus peaks get smoothed because total data is averaged over
a much wider time range.
> Is it possible to name the dynamic network interfaces so I don't have to keep
> a list of all the routers' ip addresses?
Yes, rename it as if it was a normal interface.
>> -----Original Message-----
>> From: ntop-boun...@listgateway.unipi.it [mailto:ntop-
>> boun...@listgateway.unipi.it] On Behalf Of Simone Mainardi
>> Sent: Tuesday, 13 February 2018 1:29 AM
>> To: n...@unipi.it
>> Subject: Re: [Ntop] Combining subnet statistics
>> Yes, you can do that.
>> You should create an host pool for any branch you are interested monitoring.
>> An host pool can be defined as a set of subnets so this will do the trick.
>> you've created the pools, visit the ntopng preferences and enable the
>> timeseries creation for them.
>>> On 12 Feb 2018, at 00:08, Peter Shute <psh...@nuw.org.au> wrote:
>>> We have several subnets in each of our branch offices that can use our
>> WAN. I have listed each of these in ntopng.conf:
>>> I can view charts for each subnet individually, but I would like to see the
>> total for each branch office. E.g 192.168.2.0/24 + 192.168.32.0/24 +
>>> Is there a way to do this? Because of the subnet ranges they've used (last
>> digit of second last number indicates branch office), I can't just define a
>> subnet range to cover them.
>>> Peter Shute
>>> Ntop mailing list
>> Ntop mailing list
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