Hello,

I'm running ntop3.2 compiled from code on an FC6 box.

I have several ntop processes running one one box and listening for flows on 
separate ports.   This is to provide separate information for "subnets" under 
our larger Class B network range.  For example, we are interested in seeing 
stats specific to the network for our Veterinary School as compared to the 
stats for our Education school...each of which resides on separate address 
spaces in our Class B network but "reside" off the same physical router.

These processes have their "local-subnets" defined as the network range 
corresponding to the various colleges.  I also have a process which defines a 
local-subnet as our entire Class B as I'm curious to get a picture of all 
traffic going in/out of the router.

The odd thing is that the network load graph (Summary -> Network Load) for the 
entire ClassB is *less* than that for each of the colleges.  This doesn't make 
sense to me.  You'd think that the various subnets under our Class B would add 
up to the total for the Class B!?  So, for example, our Veterinary School's 
network load  graph shows an average of 16.2 Mbits, but the total for our 
entire Class B off that same router shows 16.0Mbits.

Given these are different processes, each analyzing flow data from the same 
router, they should be seeing the same thing, yet they are coming up with 
conflicting reports.


I'm not sure why this is, and was wondering if anyone had any ideas or has seen 
similar results?

Thank you --Greg Redder

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Greg Redder                         Academic Computing & Networking Services
Colorado State University, ACNS     Phone:(970)491-7222  FAX:  (970)491-1958
601 S. Howes, Room 625              E-mail: [EMAIL PROTECTED]
Fort Collins, CO 80523       PGP Fprint:CD62EAE6227D96FC7C232B16DFE3B5D9B2F64352
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