NetFlow

[Paul Williams]

Apologies if this is in the wrong forum. I am trying to understand NetFlow and have the feeling I may ne missing something. I was under the impression that to use NetFlow you needed to have a NetFlow card, but most of my reading around the site would indicate that its all done via software.

Please could someone correct me on this. We have a 6500 with MSFC2

[Collin Clark]

That should work just fine as it is in software.

http://cisco.com/en/US/products/ps6601/prod_white_papers_list.html

http://cisco.com/en/US/tech/tk812/technologies_tech_note09186a008015efaa.shtml

[Paul Williams]

Thanks for the reply. A couple of other questions - we are using mls on the 6500 - is it possible to monitor the traffic on mls as well.

Also I read about a PFC is this needed at all?

Lastly - can I use Cisco LMS as a flow collector or does it need another (third party?) application.

[peter.nowack]

You can use Cisco collector, you can export netflow version 5 or 7 from the mls,

see command mls nde and mls flow ... or visit http://netflow.caligare.com/configuration_native.htm for information how to configure netflow export for the Native IOS.

Peter

[avmabe]

Keep in mind the flow table size is entirely dependent on your msfc version. PFC3b can only handle 128K flows in the table and has a pretty horrible hash efficiency. The BXL is better, but still only has 256K flow entries in the table. I cannot use netflow in my 6500's or 7600's becuase I push around 300K flows per second through the boxes....

[natamen]

Hi Paul,

This might not be the answer you are expecting but as far as I know most/all of the "NetFlow" features are performed via software BUT be sure that your hardware is capable of supporting it. Hardware means Engine version, memory size, processors and so on...

I am sorry no one else has replied to your question.

Maybe we are visting the wrong forum.

Regards,

Nataniel

[natamen]

Upsss, I just saw the replies...

I apologize =S