Cisco Exam 352-001 Topic 4 Question 34 Discussion

A network administrator is in charge of multiple IPsec VPN headend devices that service thousands of remote connectivity, point-to-point, IPsec/GRE tunnels. During a recent power outage, in which it was found that a backup power supply in one of those head routers suffered a complete shutdown event. When the router was successfully recovered, remote users found intermittent connectivity issues. There issue stopped after several hours. The network operations staff accessed the headend devices and found that the recently recovered unit was near 100% CPU utilization for a long period of time. How would you redesign the network VPN headend devices to prevent this from happening again in the future?