Overview
The 8320 switch only supports Boot-up Diagnostics (Power On Selftest aka POST).
Power On Self Test (POST) is the first task which verifies the hardware functionality of various modules during boot-up. Based on the criticality of the test, the selftest module decides whether to go ahead with the boot-up sequence of a particular subsystem or interface during a POST failure.
POST comprises of the following:
Front-end Port Loopback tests
This test verifies the physical port front-end interface.
These tests check if a particular interface can function properly. A test failure would mean that the particular interface is marked as "Failed" and thus it would become unavailable for use.
This test is run when "no fastboot" is configured.
Register read/write
This test checks for the registers and tables in the ingress pipeline of ASIC. It is always run during platform initialization only.