Brocade 6520 Hardware Reference Manual - Manual (Page 33)

Brocade 6520 Hardware Reference Manual 21
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POST and boot-up specifications
3
POST and boot-up specifications
When the switch is turned on or rebooted, the switch performs power-on self-test (POST). Total
boot-up time with POST can be several minutes. POST can be omitted after subsequent reboots by
using the fastboot command or entering the diagDisablePost command to persistently disable
POST.
For more information about these commands, refer to the Fabric OS Command Reference.
POST
The success or failure results of the diagnostic tests that run during POST can be monitored
through LED activity, the error log, or the command line interface.
POST includes the following tasks:
• Conducts preliminary POST diagnostics.
• Initializes the operating system.
• Initializes hardware.
• Runs diagnostic tests on several functions, including circuitry, port functionality, memory,
statistics counters, and serialization.
Boot-up
In addition to POST, boot includes the following tasks after POST is complete:
• Performs universal port configuration.
• Initializes links.
• Analyzes fabric. If any ports are connected to other switches, the switch participates in a fabric
configuration.
• Obtains a domain ID and assigns port addresses.
• Constructs unicast routing tables.
• Enables normal port operation.
Fan assembly
status (one
bi-color LED) No light Fan assembly is not receiving
power. Verify that the fan FRU is seated
correctly.
Steady green Fan assembly is operating
normally. No action required.
Steady amber (for
more than 5
seconds) Fan fault for one of the following
reasons:
•
A fan assembly with
mismatched airflow is
present.
•
One or more of the fans in
the fan assembly has
failed.
Try one of the following:
•
Replace the mismatched fan
assembly with one that has the
correct airflow direction.
•
Replace the faulty fan assembly.
TABLE 8 Non-port side LED patterns during normal operation (Continued)
LED name LED color Status of hardware Recommended action