Brocade Communications Systems VA-40FC, Hardware Reference Manual

Page: 35 / 60

Brocade VA-40FC Hardware Reference Manual 23
53-1001540-04
POST and boot specifications
3
POST and boot specifications
When the switch is turned on or rebooted, the switch performs POST. 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 tasks:
1. Conducts preliminary POST diagnostics.
2. Initializes the operating system.
3. Initializes hardware.
4. Runs diagnostic tests on several functions, including circuitry, port functionality, memory,
statistics counters, and serialization.
Boot
In addition to POST, boot includes the following tasks after POST is complete:
1. Performs universal port configuration.
2. Initializes links.
3. Analyzes fabric. If any ports are connected to other switches, the switch participates in a fabric
configuration.
4. Obtains a domain ID and assigning port addresses.
5. Constructs unicast routing tables.
6. Enables normal port operation.
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.
See Table 1 for descriptions and interpretations of LED patterns. If one or more LEDs do not
display a healthy state, verify that the LEDs on the switch are not set to “beacon” by entering
the switchShow command to detect if beaconing is active.