C Troubleshooting

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.

Troubleshooting

 

Table 26 provides a list of issues, possible causes, and recommended actions.

TABLE 26

Troubleshooting the Brocade DCX 8510-4

 

 

 

 

 

Issue

 

Possible cause

Recommended action

 

 

 

Entire chassis powers off

Power supplies are inadequate to support the

Add an additional power supply.

automatically.

 

installed components.

 

 

 

 

Several or all components are not

One or both power cables may not be

Ensure that both power cables are connected to live

operating.

 

connected to a live source.

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

Serial cable is not connected correctly.

Ensure that the cable is firmly connected to

port logs have incorrect or missing

 

workstation computer and to the Brocade DCX

information.

 

 

8510-4.

 

 

 

 

 

 

Terminal emulator application parameters

Ensure that the terminal emulator application is

 

 

are not set correctly.

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 8510-4 is connected to an RS-232 port. RS-423 serial ports might experience difficulties due to corner-case incompatibilities of the standards.

Pins on the serial cable or serial port might be damaged.

Remove the cable and inspect the pins on the cable and in the serial port. Do not reinstall if the pins on either component have any visible damage, as this could damage the pins on the other component. Replace the components as required.

CP Ethernet link speed is different than expected or a link cannot be established.

There might be a conflict with the CP Ethernet link speed negotiation set up by the network.

Specify the CP Ethernet link speed by typing the ifModeSet command.

For more information about Ethernet connectivity to the Brocade DCX 8510-4, refer to the LAN guidelines provided through the MyBrocade Web site.

Configuration data is inaccurate or cannot be accessed.

Chassis was powered off/on while an WWN card was uninstalled or failed.

The Brocade DCX 8510-4 was rebooted while an WWN card was uninstalled or failed.

Install an operational WWN card and power the system off/on again.

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Brocade Communications Systems DCX 8510-4 Troubleshooting the Brocade DCX, Issue Possible cause Recommended action