Peter, > 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?
Correct > 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. Simone > >> -----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. >> Once >> you've created the pools, visit the ntopng preferences and enable the >> timeseries creation for them. >> >> Simone >> >>> 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: >>> --local-networks= >> "192.168.0.0/23,192.168.2.0/24,192.168.3.0/24,192.168.6.0/24,192.168.7.0/24, >> 192.168.30.0/24,192.168.60.0/24,192.168.32.0/24,192.168.62.0/24,192.168.33. >> 0/24,192.168.3.0/24,192.168.37.0/24,192.168.67.0/24" >>> >>> 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 + >> 192.168.62.0/24. >>> >>> 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@listgateway.unipi.it >>> http://listgateway.unipi.it/mailman/listinfo/ntop >> >> _______________________________________________ >> Ntop mailing list >> Ntop@listgateway.unipi.it >> http://listgateway.unipi.it/mailman/listinfo/ntop > _______________________________________________ > Ntop mailing list > Ntop@listgateway.unipi.it > http://listgateway.unipi.it/mailman/listinfo/ntop _______________________________________________ Ntop mailing list Ntop@listgateway.unipi.it http://listgateway.unipi.it/mailman/listinfo/ntop
