Before I reply, can you tell me if your 40+ routers all see different / unique 
flows?  OR - is this some sort of massive crazy mesh with asymmetrical routing 
and such?  If the latter - you will have a difficult time de-duping the same 
flow reported from multiple routers.

-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of Jim Rice
Sent: Tuesday, March 22, 2011 12:54 PM
To: [email protected]; [email protected]
Subject: Re: [Ntop] Basic configuration for multiple netflow data

Thanks Gary,

That does help.  But I am still a bit confused.  ;-)

What I am trying to accomplish is to collect netflow data from our network that 
has 40+ routers.  We have ax x.y.z.0/21 network.  Each router is on its own 
subnet of that.

Do I create a separate netflow device for each one?

What would be the Virtual Netflow Interface Network Address "network address" 
and "network mask" I would configure?

If the network address is the IP of the router itself, and it has a netmask of 
/30, do I use that, or would I specify the netmask for the entire network range 
(/19)?

Or am I just looking at this all wrong?

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