I currently have a 2611XM and a 1720 router setup with a GRE tunnel between them running over Ipsec.
When I run 'show processes cpu', the 'Encrypt Proc' process is always consuming a high percentage of the cpu resources. This affects the throughput I'm getting as well as the general responsiveness of the routers. The overall CPU usage hovers around 96% when there is high data throughput. This is on both routers.
I am likely to want to setup additional VPN tunnels that terminate at these routers. Do I need to look at replacing these routers, with 1800 series routers for example?