POST

The device automatically performs POST each time it is powered on or reset. To verify that POST has completed without error, do the following tasks:

• Verify that all LEDs return to a normal state after POST completes.

  If one or more LEDs do not return to a normal state, and this is not due to the device being set to beacon, refer to the relevant LED table to identify and correct the problem. For port blades, and CP and core switch blades, the slotShow command can be used to check the status of the slots. For information about turning beaconing on or off, refer to the Brocade Fabric OS Administration Guide.

• Verify that the switch prompt displays when POST completes.

  If it does not display, POST was not successfully completed. Contact the device supplier for support.

• Review the system error log using the errShow or errDump commands.

  Any errors detected during POST are written to the system log, which is accessible through the errShow command. For information about error messages, refer to the Brocade Fabric OS Message Reference Manual.

POST includes the following steps:

1. Preliminary POST diagnostics are run.
2. The operating system is initialized.
3. Hardware is initialized.
4. Diagnostic tests are run on several functions, including circuitry, port functionality, ability to send and receive frames, all aspects of memory, parity, statistics counters, and serialization.