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. ----------------------------------------------------------------------- Roland Dobbins <rdobbins@cisco.com> // 408.527.6376 voice Culture eats strategy for breakfast. -- Ford Motor Company