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4
Interpreting POST results
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:
•
•
•
•
Boot
In addition to POST, boot includes the following tasks after POST is complete:
•
•
•
•
•
•
Interpreting POST results
POST is a system check that is performed each time the switch is powered on, rebooted, or reset.
During POST, the LEDs flash either amber or green. Any errors that occur during POST are listed in
the error log.
Complete the following steps to determine whether POST completed successfully and whether any
errors were detected.
1. Verify that the switch LEDs indicate that all components are healthy.
2. Verify that the switch prompt displays on the terminal of a computer workstation connected to
3. Review the switch system log for errors. Any errors detected during POST are written to the
For information about all referenced commands, and on accessing the error log, refer to the
Brocade Network OS Administrator's Guide. For information about error messages, refer to the
Brocade Network OS Message Reference.
30
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.
Performs 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.
Refer to
Table 3
and
Table 4
the switch.
If there is no switch prompt when POST completes, press Enter. If the switch prompt still does
not display, try opening a Telnet session or accessing the switch through another management
tool. If this is not successful, the switch did not successfully complete POST. Contact your
switch supplier for repair.
system log, accessible through the show logging raslog command.
for descriptions and interpretations of LED patterns.
Brocade VDX 6740 Hardware Reference Manual
53_1002829_02
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