It seems your router is recieving a lot of traffic that needs te be encrypted but it seems the router can't handle the load.
Does the router has an hardware vpn accelator? If not Encryption is handled by the router CPU.
Maybe try to reduce the traffic that needs to be encrypted.
If you can find one then a "AIM-vpn/epII" would help by offloading the encryption
(someone please correct me if I'm wrong I know that the aim-vpn/ep works on a 2651 but I'm unsure about the II)
it maybe possible something on the other side of the tunnle has changed
for sure the problem is not on the traffic load ,traffic didnt exceed 30% on the lease line..suddenly the cpu utilization become 99% the process utilizing the cpu is "encrypt proc"
any other suggestion??
thanks for all replies.....
When you stop to use encrypt something happen? A proccess go down? Infact, when the proccess grow up? when you start some proccess in a router, like dhcp, nat, etc...?