periodic patterns in juniper netflow exports

Thu Jan 3 12:03:32 UTC 2008

On Jan 3, 2008, at 7:53 PM, Fernando Silveira wrote:

>  The patterns I'm
> talking about would imply an absolute clock (independent of any flow)
> ticking every minute, and flushing the entire flow cache. The result
> of this would be the binning effect I mentioned.

Yes, what you're describing is in fact different from the Cisco active  
flow timer.  The Cisco active flow timer is set relative to the  
beginning of the flow, as you indicate, and not a system-wide purge of  
the entire cache (I didn't parse that properly in your initial query,  
apologies) on some sort of fixed-time basis.

There are folks involved in various NetFlow collection/analysis  
efforts on this list, I'm sure one of them or someone from Juniper  
will respond.  juniper-nsp might also be a good place to ask.

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Roland Dobbins <rdobbins at cisco.com> // 408.527.6376 voice

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