Chapter 1 2 Configuring Online Diagnostics; Bootup Diagnostics; Runtime Or Health Monitoring Diagnostics - Cisco Nexus 9000 Series Configuration Manual

Bootup Diagnostics

Bootup Diagnostics
Bootup diagnostics run during bootup and detect faulty hardware before Cisco NX-OS brings a module online.
For example, if you insert a faulty module in the device, bootup diagnostics test the module and take it offline
before the device uses the module to forward traffic.
Bootup diagnostics also check the connectivity between the supervisor and module hardware and the data and
control paths for all the ASICs. The following table describes the bootup diagnostic tests for a module and a
supervisor.
Table 11: Bootup Diagnostics
Diagnostic
Module
OBFL
Supervisor
USB
ManagementPortLoopback
EOBCPortLoopback
OBFL
Bootup diagnostics log failures to onboard failure logging (OBFL) and syslog and trigger a diagnostic LED
indication (on, off, pass, or fail).
You can configure the device to either bypass the bootup diagnostics or run the complete set of bootup
diagnostics.

Runtime or Health Monitoring Diagnostics

Runtime diagnostics are also called health monitoring (HM) diagnostics. These diagnostics provide information
about the health of a live device. They detect runtime hardware errors, memory errors, the degradation of
hardware modules over time, software faults, and resource exhaustion.
Health monitoring diagnostics are nondisruptive and run in the background to ensure the health of a device
that is processing live network traffic. You can enable or disable health monitoring tests or change their
runtime interval.
The following table describes the health monitoring diagnostics and test IDs for a module and a supervisor.
Cisco Nexus 9000 Series NX-OS System Management Configuration Guide, Release 6.x
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Description
Verifies the integrity of the onboard failure logging (OBFL) flash.
Nondisruptive test. Checks the USB controller initialization on a module.
Disruptive test, not an on-demand test. Tests loopback on the
management port of a module.
Disruptive test, not an on-demand test. Ethernet out of band.
Verifies the integrity of the onboard failure logging (OBFL) flash.
Configuring Online Diagnostics