Brocade Communications Systems DCX Backbone, Hardware Installation Manual, Page: 145 / 167

3. Fabric is analyzed. If any ports are connected to other switches, the Brocade DCX participates in a fabric configuration.
4. The Brocade DCX 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. 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 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
Brocade Fabric OS Administration Guide
All diagnostic tests are run at link speeds of 1, 2, 4, and 8 Gbps. 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 Brocade Fabric OS Administration Guide and the Brocade
Fabric OS Command Reference . For information about system error messages ( errShow or errDump ), refer to the Fabric OS
Troubleshooting and Diagnostics Guide .
Troubleshooting
The following table provides a list of issues, possible causes, and recommended actions.
TABLE 18 Troubleshooting the Brocade DCX
Issue Possible cause Recommended action
Entire chassis powers off automatically. Power supplies are inadequate to support the
installed components. Add an additional power supply.
Several or all components are not operating. One or both power cables may not be
connected to a live source. Ensure that both power cables are connected to
live outlets.
One or both AC power switches might be off. Ensure that both AC power switches are on (AC
switches light up green when on).
Serial connection is faulty or serial port logs have
incorrect or missing information. Serial cable is not connected correctly. Ensure that the cable is firmly connected to
workstation computer and to the Brocade DCX.
Terminal emulator application parameters are
not set correctly. Ensure that the terminal emulator application is
configured as follows: 9600 bits per second, 8
databits, no parity, 1 stop bit, no flow control.
Serial port might be incompatible (only RS-232
is supported). Ensure that the Brocade DCX is connected to an
RS-232 port. RS-423 serial ports might
experience difficulties due to corner-case
incompatibilities of the standards.
Troubleshooting
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