Cisco Netflow......

Unanswered Question
Jul 19th, 2007


I've done some digging and cannot seem to find any relevant information on Cisco Netflow, with respect to Layer3 switches.

Is it possible to obtain Netlfow data from a Layer3 Cisco switch. How about from an ASA?

Appreciate any help.


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Overall Rating: 5 (1 ratings)
Jan Nejman Fri, 07/20/2007 - 00:14


NetFlow is supported on the Cisco 800, 1700, 2600, 1800, 2800, 3800, 4500, 6500, 7200, 7300, 7500, 7600, 10000, 12000, CRS-1.

Netflow is NOT supported on the: Cisco 2900, 3500, 3750.

(On Cat4000 you need a special card for netflow support).

More netflow related information you may find on the:


Kind regards

Jan Nejman

Caligare Co.,

94halldah Mon, 07/23/2007 - 12:39

To get the info your looking for, you will need to enable mls flows as well as netflow.

snippet from working 6509:

mls rp nde-address x.x.x.x

mls flow ip full

mls nde sender version 5

ip flow-export source Loopback1

ip flow-export version 5 peer-as

ip flow-export destination x.x.x.x %udp port%

ip flow-aggregation cache as

export destination x.x.x.x %udp port%


You also have to enable " ip route-cache flow" for each interface that you want stats from.



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