Brocade 300 Hardware Reference Manual - Manual (Page 28)

Brocade 300 LED Patterns During Normal Operation (Continued) TABLE 1
LED Name LED Color Status of Hardware Recommended Action
Steady amber (for
more than five
seconds) Port is receiving light or signal
carrier at 4 Gbps; but is not yet
online. No action required.
POST and boot specifications
When the switch is turned on or rebooted, the switch performs POST (power on, self test). Total boot
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 Manual .
POST
The success or failure results of the diagnostic tests that run during POST can be monitored through
the error log or the command line interface.
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, memory,
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, and if any ports are connected to other switches, the switch participates in a
fabric configuration.
4. Switch obtains a domain ID and assigns port addresses.
5. Unicast routing tables are constructed.
6. Normal port operation is enabled.
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.
To determine that POST completed successfully and whether or not any errors were detected:
POST and boot specifications
28 Brocade 300 Hardware Reference Manual
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