Performing Switch Diagnostics

The switch provides a facility for running normal or extended diagnostics.

In simple terms, a normal routine performs a simple ASIC and packet loopback test on all ports, and an extended routine performs extensive ASIC, ASIC-memory, and packet loopback tests. By running and viewing the results from diagnostic tests, you can detect and troubleshoot any hardware issues.

On Summit family switches, you run the diagnostic routine on the switch or on the stacking ports. Running the switch or stacking port diagnostic routine affects system operation; the switch is unavailable during the diagnostic test.



Before running diagnostics, you must power on the External Power Supply (EPS) when it is connected to the switch.
When you run diagnostics, the switch verifies that the:
  • Registers can be written to and read from correctly.
  • Memory addresses are accessed correctly.
  • Application-Specific Integrated Circuit (ASICs) and Central Processing Unit (CPUs) operate as required.
  • External ports can send and receive packets.
  • Sensors, hardware controllers, and LEDs are working correctly.

When you run diagnostics on the SummitStack stacking ports, the switch completes a hardware test to ensure that the stacking ports are operational.