net flow

Unanswered Question
Dec 20th, 2009


i configured on my cisco 1841 net flow

can i change the interval from the minimum 1 minute to few seconeds ?

ip flow-cache timeout active 1


I have this problem too.
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Giuseppe Larosa Sun, 12/20/2009 - 07:26

Hello Golan,

according to Neflow command reference


Specifies the active flow timeout.


(Optional) The number of minutes that an active flow remains in the cache before it times out. The range is from 1 to 60. The default value is 30.

you cannot specify a time less then 1 minute.

However, I wonder if this makes sense the flow cache needs to store active flow for some time. Of course the table has a limited size and to avoid overflow it can be wise to reduce the time an active flow uses one entry in the cache but the lower limit is 1 minute.

Hope to help



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