I'm using ntop to analyze netflow data only. The instructions to
configure Netflow are very straight forward from the netflow plugin
menu, however I have problems when more than one virtual interface is
configured and there is only ONE (cisco core switch) sending netflow
to ntop: Netflow activity is only reported for the last interface
configured.
So far I can only on virtual netflow interface work per netflow sender.

Let me explain what I'm trying to accomplish (perhaps I'm asking too much):
- Send netflow data(version 5) from ONE Cisco core device
- Configure Ntop virtual interfaces for as many network segments as
this Cisco device is configured for (currently no more than 4).
- Have Ntop split the netflow data for analysis through its virtual
interface switching so each interface reports on every segment.

After configuring the above, I found that only the last interface
configured is the one reporting netflow activity. (verified by
checking: rrd graphs truncated, ntop log show netflow received on last
"deviceId=4" only, editing ntop netflow interface plugin for previous
three shows no netflow stats)

Again, so far I've only succeeded by having multiple Cisco devices
sending netflow data to ntop on different destination udp ports.

I tried this using compiled ntop 3.1.1 (from cvs March 29, 05) and
using ntop rpm 3.1 for Linux, both with the same result.

Any suggestions or recommendations will be appreciated.

-Tomas
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