53-1002177-19 Hardware Installation Guide
Brocade DCX 8510-4 Backbone Hardware Installation Guide
Interpreting POST and boot results
The device performs Power-On Self-Test (POST) by default each time the chassis is powered on, rebooted, or reset.
The device 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 device automatically performs POST each time it is powered on or reset.
To verify that POST has completed without error, do the following:
•
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.
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.
3. Fabric is analyzed. If any ports are connected to other switches, the device participates in a fabric configuration.
4. The device obtains a domain ID and assigns port addresses.
5. Unicast routing tables are constructed.
6. Normal port operation is enabled.
Diagnostics
Diagnostic tests are automatically run during POST to check the status of the device. Any error messages generated
during POST are sent to the error logs and to the serial console, if connected.
Diagnostic tests can also be run manually to test and troubleshoot the hardware and the firmware, including internal
connections and circuitry, transceivers, and port cables. However, diagnostic tests are generally intended for use by
support personnel.
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