Each service, such as OSPF or BGP, runs as an independent process. If a process fails, it can be restarted statefully without impacting the entire system.

To ensure rapid recovery, NX-OS uses PSS to store operational runtime information, allowing services to restore their last known state instantly upon restart.

Unlike traditional IOS, NX-OS is designed for maximum scalability and application availability through a highly modular and self-healing design.