Brocade DCX 8510-4 Backbone Hardware Reference Manual - Manual (Page 133)

Any errors detected during POST are written to the system log, which is accessible through the
errShow command. For information about error messages, refer to the Fabric OS Message
Reference.
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, ability to send and
receive frames, all aspects of memory, parity, 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. If any ports are connected to other switches, the Brocade DCX 8510-4
participates in a fabric configuration.
4. The Brocade DCX 8510-4 obtains a domain ID and assigns port addresses.
5. Unicast routing tables are constructed.
6. Normal port operation is enabled.
Diagnostics
Diagnostic tests are automatically run during POST to check the status of the Brocade DCX 8510-4.
Any error messages generated during POST are sent to the error logs and to the serial console, if
connected.
Diagnostic tests can also be run manually to test and troubleshoot the hardware and the firmware,
including internal connections and circuitry, transceivers, and port cables. However, diagnostic tests are
generally intended for use by support personnel.
NOTE
Error messages do not necessarily indicate that the Brocade DCX 8510-4 requires maintenance.
Each diagnostic test can be implemented by entering the related command through a Telnet or serial
session. For a list of diagnostic tests and commands, refer to the Fabric OS Administrator's Guide
All diagnostic tests are run at all supported link speeds. They might temporarily lock the transmit and
receive speeds to a specific speed. Some diagnostic tests require interconnecting the ports to each
other or using loopback plugs. If ports are interconnected, the media (cables and transceivers) at each
end of the connection must be of the same type. For example, short wavelength media must be
connected to short wavelength media, and likewise with long wavelength media and copper media.
For more information about diagnostic tests and how to run them, refer to the Fabric OS Administrator's
Guide and the Fabric OS Command Reference. For information about system error messages
(errShow or errDump ), refer to the Fabric OS Troubleshooting and Diagnostics Guide.
Boot
Brocade DCX 8510-4 Backbone Hardware Reference Manual 133
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