09-03-2010 01:17 AM - edited 03-06-2019 12:48 PM
Hi, All
We are running a cisco 2811 router in office with route and NAT.
Router#show processes cpu
CPU utilization for five seconds: 51%/46%; one minute: 50%; five minutes: 43%
.......
I know the most of CPU time is used to process interrupt. I don't know what is these interrupts working for , route or nat?
We have about 40 desktops in our office, and there is only one defaut route for internet on the router. Also, We enable the NAT on the router.
What I want to know is what is usring the most of CPU. Can anyone give some advise?
Thanks
09-03-2010 10:11 AM
Hello,
How is your default route configured? Do you have something like "ip route 0.0.0.0 0.0.0.0 fastethernet 0/0"? If that is the case, then the high CPU could be due to ARP as the router will ARP for every destination. If that is not the case, can you check and make sure that you have enabled hardware switching (you do not have "no ip route-cache" under interface configuration)?
Hope this helps.
Regards,
NT
09-05-2010 11:39 PM
Hi,
My router's default route setting is "ip route 0.0.0.0 0.0.0.0 60.247.***.***".
Router#show ip interface | include route-cache
IP route-cache flags are Fast, CEF
IP route-cache flags are Fast, CEF
IP route-cache flags are Fast, CEF
I am not sure if these settings are what you mentioned. If yes, how can I fixe it?
Thanks
09-03-2010 11:21 AM
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