How often does the CEF table get updated on a 7604 router?

[olga.aceves]

How often does the CEF table get updated on a 7604 router with 7604-SUP7203B-PS card and IOS: Advanced IP Services v15.1(3)S3 SSH - thanks!

[Nagendra Kumar Nainar]

Hi,

Per my understanding, it updates teh CEF table whenever there the routing table changes and need a update. I am not aware of any periodic update.

-Nagendra

[olga.aceves]

Hi Kumar,

I wasn't sure if it is done dynamically whenever there are changes or if there were timers that it uses to conduct it's table refresh rates and are those timers adjustable?  The documentation on the Cisco site is very vague when it comes to CEF tables on IOS's 15.1 and above.  Any good links you have on how it does it's updating would be very helpful to me - thanks!