Information About Cisco NX-OS Service Restarts
The Cisco NX-OS service restart features allows you to restart a faulty service without restarting the supervisor to prevent process-level failures from causing system-level failures. You can restart a service depending on current errors, failure circumstances, and the high-availability policy for the service. A service can undergo either a stateful or stateless restart. Cisco NX-OS allows services to store run-time state information and messages for a stateful restart. In a stateful restart, the service can retrieve this stored state information and resume operations from the last checkpoint service state. In a stateless restart, the service can initialize and run as if it had just been started with no prior state.
Not all services are designed for stateful restart. For example, Cisco NX-OS does not store run-time state information for Layer 3 routing protocols (such as Open Shortest Path First [OSPF] and Routing Information Protocol [RIP]). Their configuration settings are preserved across a restart, but these protocols are designed to rebuild their operational state using information obtained from neighbor routers. For details on the high-availability functionality of Layer 3 protocols, see chapter, Network-Level High Availability .
Virtualization Support
For complete information on VDCs, see the Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration Guide.