[c-nsp] Netflow on Sup720 MSFC3/PFC3

[CEW CEW]

Hi..

I am a newbie to netflow, was reading the CCO netflow
documentation on 7600 and have a few points which i
dun quite understand:
We are using Sup 720 MSFC3/PFC3 and exporting the flow
statistic to NFC for usage billing purpose.

(1) the document says that, 
"Netflow cache on the MSFC captures statistics for
flows routed in software".
It also says that "Netflow cache on the PFC captures
statistics for flows routed in hardware".
At the same time, it says NDE on PFC supports NDE
version 5 & 7. Netflow aggregation user version 8.
Netflow aggregation is configured automatically on the
PFC and DFCs when u configure Netflow aggregation on
the MSFC.

Question: If NDE on PFC only supports version 5 and 7,
how is it able to support netflow aggregation which
requires NDE version 8 ?

(2) Can someone explain the concept/logic of sampled
netflow?
If i use sampled netflow, are the statistics collected
still accurate/acceptable?

Any comments will be greatly appreciated.

Thanks
CEW



		
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