About Cisco NX-OS System-Level High Availability
Cisco NX-OS system-level HA mitigates the impact of hardware or software failures and is supported by the following features:
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Redundant hardware components:
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Power supply
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Fan tray (Cisco Nexus 9500 platform only) or modules (Cisco Nexus 9200/9300/9300-EX/9300-FX)
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Switch fabric (Cisco Nexus 9504, 9508, and 9516 chassis only)
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System controller (Cisco Nexus 9504, 9508, and 9516 chassis only)
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Supervisor (Cisco Nexus 9504, 9508, and 9516 chassis only)
For details about physical requirements and redundant hardware components, see the Hardware Installation Guide for your specific Cisco Nexus 9000 Series chassis.
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HA software features:
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Nonstop forwarding (NSF)—For details about nonstop forwarding, also known as graceful restart, see the Cisco Nexus 9000 Series NX-OS Unicast Routing Configuration Guide.
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Embedded Event Manager (EEM)—For details about configuring EEM, see the Cisco Nexus 9000 Series NX-OS System Management Configuration Guide.
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Smart Call Home—For details about configuring Smart Call Home, see the Cisco Nexus 9000 Series NX-OS System Management Configuration Guide.
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