Hey Greg - same issue again huh?  The graphs can definitely be
frustrating - they seem to have various and sometime numerous issues.

Just for kicks, how about wiping the data files/directories and
restarting?  Maybe something is corrupted? If you want the existing data
you can always rename it instead of wiping it.

If I remember you have quite a complex config.  Are you certain netflow
is configured correctly everywhere - capturing the right traffic in the
directions you want on the interfaces you want?

Have you tried "Host Clusters"?  Might give you some of what you want -
generic "network wide" type stats - convenient for grouping and stuff.

G


-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Redder,Greg
Sent: Tuesday, May 06, 2008 8:51 AM
To: [EMAIL PROTECTED]
Subject: [Ntop] Network Load graphs


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

========================================================================
=======
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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