Broadcom Brocade 7850 - Interpreting POST Results; Interpreting Boot Results; Running Diagnostic Tests

7850-Install-IG101 Installation Guide Brocade
®
7850 Extension Switch Hardware Installation Guide
LED Color Hardware Status Recommended Action
Steady amber The fan assembly is in one of the following
conditions:
•
A fan assembly is powered on.
•
The fan assembly has failed.
Try one of the following options:
•
Check the power cable connection.
•
Verify that the assembly is powered on.
•
Replace the fan assembly.
Interpreting POST Results
Each time the switch is powered on, rebooted, or reset, it performs a power-on self-test (POST). The total boot time
with the POST can take several minutes. The POST can be bypassed after subsequent reboots by using the fastboot
command or entering the diagDisablePost command to persistently disable the POST. The success or failure results
of the diagnostic tests that run during the POST can be monitored through LED activity, the error log, or the command line
interface. During the POST, the LEDs flash different colors.
The POST performs the following tasks:
•
Conducts preliminary diagnostics.
•
Initializes the operating system.
•
Initializes the hardware.
•
Runs diagnostic tests on several functions, including the circuitry, port functionality, memory, statistics counters, and
serialization.
Perform the following steps to determine whether the POST completed successfully and whether any errors were
detected:
1. Verify that the LEDs on the device indicate that all components are healthy. If one or more LEDs do not display a
healthy state, perform the following steps:
a) Verify that the LEDs are not set to beacon (this setting can be determined through the switchShow command or
Web Tools).
b) Follow the recommended action for the observed LED behavior.
2. Verify that the diagShow command shows that the diagnostic status for all ports in the device is OK.
3. Review the system log for errors. Errors that are detected during the POST are written to the system log, which can be
viewed by using the errShow command.
Interpreting Boot Results
Boot performs the following tasks after the POST is complete:
•
Performs universal port configuration.
•
Initializes links.
•
Analyzes the 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.
Running Diagnostic Tests
In addition to the POST, switch firmware includes diagnostic tests to help you troubleshoot the hardware and firmware.
These diagnostics test the internal connections and circuitry, the fixed media, and the transceivers and cables in use.
The tests are implemented by command, either through an SSH session or through a terminal setup for a serial
connection to the device. Some tests require that the ports be connected by external cables to allow diagnostics to verify
the serializer or deserializer interface, transceiver, and cable. Some tests require loopback plugs.
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