Many thanks for pointing that out. It seems to be new in ASA 9.1(2):
http://www.cisco.com/c/en/us/td/docs/security/asa/asa-command-reference/A-H/
cmdref1/f2.html#pgfId-2073682

Release         Modification
9.1(2)          This command was introduced.

I have to try this in lab!

Kind Regards
Erik Jans

-----Original Message-----
From: Frank Thilo [mailto:[email protected]] 
Sent: den 4 februari 2015 17:00
To: [email protected]
Subject: Re: [Nfsen-discuss] Traffic spikes when monitoring ASAs

> As far as I know the ASA's Netflow implementation only reports closed 
> flows, you don't get a report for active flows at regular intervals 
> like in IOS routers.

You can use

  flow-export active refresh-interval 5

to get NSEL update events every 5 minutes. Apparently, this config item is
not available on all ASA software versions, though.

-- 
Frank Thilo - [email protected]        IRC: Chestal

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