Information About Online Diagnostics
Online diagnostics provide verification of hardware components during switch bootup or reset, and they monitor the health of the hardware during normal switch operation.
Cisco Nexus 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.
|
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 device 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.
|
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 the fan speed and fan control. |
 Note |
When the switch reaches the intake temperature threshold and does not go within the limits in 60 seconds, the switch will power off and the power supplies will have to be re-seated to recover the switch |
The following table describes the health monitoring diagnostics that also run during system boot or system reset.
|
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. |
Note |
When the switch exceeds the intake temperature threshold of 40 degrees Celsius and does not decrease to within the threshold limits in 60 seconds, the switch powers off and the power supplies must be re-seated to recover the switch. |
Expansion Module Diagnostics
During the 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.
|
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.
|
Diagnostic |
Description |
|---|---|
|
LED |
Monitors port and system status LEDs. |
|
Temperature Sensor |
Monitors temperature sensor readings. |
Feedback