CSS Flow Statistics Description

Unanswered Question
Jul 30th, 2009
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When a flow statistics is performed in debug mode on a CSS what do the following fields actually mean

FM TCP Flows Timed Out 51

FM UDP Flows Timed Out 0

FP TCP Flows Timed Out 4304192

FP UDP Flows Timed Out 869078

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Syed Iftekhar Ahmed Thu, 07/30/2009 - 16:41
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It tells you how many times the CSS removed the flow because it had seen no

activity on it.

Any flow that remains inactive for the default/configured timeout value ( I think its 16sec for http)is timed out.

You can increase this timer by

using the "flow-timeout-multiplier " under the content rule. This parameter

is detailed here:

content yourcontent

add service yourservice1

add service yourservice2

vip address x.x.x.x

advanced-balance sticky-srcip

sticky-inact-timeout 600

flow-timeout-multiplier 5400


(The value to choose with flow-timeout-multiplier command should be in increments of 16 seconds.For eg the above value means one day (5400x16=86400secs).


Syed Iftekhar Ahmed

ppatel Sun, 08/02/2009 - 23:21
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Hi Syed Iftekhar,

What does the FM TCP Flows Timed Out 51 exactly mean. Does it mean a flow is setup in the slow path and it is not pushed to the fast-path cache but still abides by the flow-timeout parameter?



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