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Configuring Online Diagnostics
This chapter describes how to configure the generic online diagnostics (GOLD) feature. It contains the following sections:
Information About Online Diagnostics
Online Diagnostics Overview
Cisco Nexus 5000 Series switches support bootup diagnostics and runtime diagnostics. Bootup diagnostics include disruptive tests and nondisruptive tests that run during system bootup and system reset.
Runtime diagnostics (also known as health monitoring diagnostics) include nondisruptive tests that run in the background during normal operation of the switch.
Bootup Diagnostics
Bootup diagnostics detect faulty hardware before bringing the switch online. Bootup diagnostics also check the data path and control path connectivity between the supervisor and the ASICs. The following table describes the diagnostics that are run only during switch bootup or reset.
Table 1 Bootup Diagnostics Diagnostic
Description
PCIe
Tests PCI express (PCIe) access.
NVRAM
Verifies the integrity of the NVRAM.
In band port
Tests connectivity of the inband port to the supervisor.
Management port
Tests the management port.
Memory
Verifies the integrity of the DRAM.
Bootup diagnostics also include a set of tests that are common with health monitoring diagnostics.
Bootup diagnostics log any failures to the onboard failure logging (OBFL) system. Failures also trigger an LED display to indicate diagnostic test states (on, off, pass, or fail).
You can configure Cisco Nexus 5000 Series switches to either bypass the bootup diagnostics, or run the complete set of bootup diagnostics.
Health Monitoring Diagnostics
Health monitoring diagnostics provide information about the health of the switch. They detect runtime hardware errors, memory errors, software faults, and resource exhaustion.
Health monitoring diagnostics are nondisruptive and run in the background to ensure the health of a switch that is processing live network traffic.
The following table describes the health monitoring diagnostics for the switch.
Table 2 Health Monitoring Diagnostics Tests Diagnostic
Description
LED
Monitors port and system status LEDs.
Power Supply
Monitors the power supply health state.
Temperature Sensor
Monitors temperature sensor readings.
Test Fan
Monitors fan speed and fan control.
The following table describes the health monitoring diagnostics that also run during system boot or system reset.
Table 3 Health Monitoring and Bootup Diagnostics Tests Diagnostic
Description
SPROM
Verifies the integrity of backplane and supervisor SPROMs.
Fabric engine
Tests the switch fabric ASICs.
Fabric port
Tests the ports on the switch fabric ASIC.
Forwarding engine
Tests the forwarding engine ASICs.
Forwarding engine port
Tests the ports on the forwarding engine ASICs.
Front port
Tests the components (such as PHY and MAC) on the front ports.
Expansion Module Diagnostics
During switch bootup or reset, the bootup diagnostics include tests for the in-service expansion modules in the switch.
When you insert an expansion module into a running switch, a set of diagnostics tests are run. The following table describes the bootup diagnostics for an expansion module. These tests are common with the bootup diagnostics. If the bootup diagnostics fail, the expansion module is not placed into service.
Table 4 Expansion Module Bootup and Health Monitoring Diagnostics Diagnostic
Description
SPROM
Verifies the integrity of backplane and supervisor SPROMs.
Fabric engine
Tests the switch fabric ASICs.
Fabric port
Tests the ports on the switch fabric ASIC.
Forwarding engine
Tests the forwarding engine ASICs.
Forwarding engine port
Tests the ports on the forwarding engine ASICs.
Front port
Tests the components (such as PHY and MAC) on the front ports.
Health monitoring diagnostics are run on in-service expansion modules. The following table describes the additional tests that are specific to health monitoring diagnostics for expansion modules.
Configuring Online Diagnostics
ProcedureYou can configure the bootup diagnostics to run the complete set of tests, or you can bypass all bootup diagnostic tests for a faster module boot up time.
Note
We recommend that you set the bootup online diagnostics level to complete. We do not recommend bypassing the bootup online diagnostics.
