Hi,
I have a 3620 working on overload NAT function, which does NAT roughtly 125 inside IPs to the public IP.. The problem I face is the router CPU utilisation is accumulating periodically and I have to do a "clear ip nat translations" to bring my CPU utilisation to normal. Once I do clear ip nat .. CPU utl drops to 5% or less. Users on the LAN are also feeling the difference as the NAT table is cleared. Iam also using NAT translation time out for TCP as 10seconds, so the NAT table clears automatically when the traffic stops. I have enabled CEF also which has shown slight improvements. Is there any limitations on the number of translations the router can do ?... Can someone also suggest is there any IOS bugs relating to this.
The IOS router uses is : 12.1.3a
Feature set is : IP plus
regards,
KCS Balaji
email : kcsbala@vsnl.net