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Ip route-cache age out on 3600.

What is the age out time of a entry in the ip route-cache (Fast Switching) on a 3600? This time seems to vary but I cannot figure out what determine when each entry is removed from the cache.

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Anonymous
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Re: Ip route-cache age out on 3600.

For fast switching:

"Aging Fast Switching Entries

To keep the fast switching entries from losing their synchronization with the routing table and ARP cache, and to keep unused entries in the fast cache from unduly consuming memory on the router, 1/20th of the

fast cache is invalidated, randomly, every minute. If the routers memory drops below a very low watermark, 1/5th of the fast cache entries are invalidated every minute. "

For other mechanisms you can find information at:

http://www.cisco.com/warp/public/105/20.html

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