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Flexible Netflow v9 | Flow Identification (5 Tuple)

tschafferx
Level 1
Level 1

Hello Cisco Community,

 

I read that the minimum fields to determine a flow in Netflow is the 5 Tuple (SA,DA,SP,DP,PR).

Now I read about flexibleNetFlow and that there is a possibility to define KeyFields. (IP (Source or Destination), Mask (Source or Destination)...

Here comes my question:

 

If the mininimum required fields are the 5 Tuple, then how can I possibly identify a flow that just matches the key field Source IP Address? 

 

Thank you in advance.

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