Interpreting Post And Boot Results; Post; Boot - Brocade Communications Systems DCX Backbone Hardware Installation Manual

Interpreting POST and boot results

TABLE 17 Environmental status and maintenance commands (continued)
Command
psShow
fanShow
chassisShow
slotShow
errShowerrDump
Interpreting POST and boot results
The Brocade DCX performs Power-On Self-Test (POST) by default each time the chassis is powered on, rebooted, or reset. The Brocade
DCX can be rebooted using the reboot (to reboot each CP individually) or fastBoot commands. The fastBoot command reboots the
switches without running POST. If the active CP blade is rebooted, it fails over to the standby CP blade.

POST

The Brocade DCX automatically performs POST each time it is powered on or reset.
To verify that POST has completed without error:
• 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 Brocade DCX 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 Brocade DCX 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.
POST includes the following steps:
1. Preliminary POST diagnostics are run.
2. 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.

Boot

In addition to POST, boot includes the following steps after POST is complete:
1. Universal port configuration is performed.
2. Links are initialized.
144
Information displayed
Status of all operational power supplies
Status and RPM of all operational fans
Serial number, time awake, and additional information about each
component
Slot occupancy
System error log. Refer to the Brocade Fabric OS Message Reference for
more information on the messages in this log.
(Monitoring System Components
Brocade DCX Backbone Hardware Installation Guide
on page 63).
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