Question

A network engineer is deploying a Cisco ISE 3.x virtual appliance to serve as a dedicated Policy Service Node (PSN) supporting up to 20,000 concurrent sessions. The virtualization team allocated the VM with sufficient vCPU and RAM but reports intermittent authentication latency and warnings in ISE about performance degradation. Which action should the engineer recommend to ensure the virtual PSN meets Cisco's supported performance specifications?

Accepted Answer

Configure CPU and memory reservations on the VM to guarantee dedicated resources matching the equivalent physical appliance profile

Answer

Enable memory ballooning and CPU oversubscription so the hypervisor can dynamically allocate resources during peak load

Answer

Reduce the vCPU count to lower scheduling overhead and let the hypervisor optimize placement automatically

Answer

Deploy the VM using thin-provisioned disk to improve I/O throughput and reduce authentication latency