Dell PowerVault 51F (8P Fibre Channel Switch) - Manual (Page 106)

5-2 Dell PowerVault 51F 8-Port Fibre Channel Switch Installation and Troubleshooting Guide
To retest a port which has been marked BAD , clear the port and set to OK using the
diagClearError (port#) command. This command clears the port status only and does
not clear the logs or change the port’s condition. The diagClearError (port#) com-
mand should only be used during diagnostic procedures to reset a bad port for re-test.
For more detailed error message information, see Appendix A, “Error Messages.”
Issuing Telnet Commands
Telnet commands (see Chapter 4 “PowerVault 51F Commands”) are available to
determine the switch’s status, error conditions, and switch operating statistics.
The diagnostic procedures are completed using commands during a Telnet session.
Isolating a System Fault
Various loopback paths are built into the switch hardware for diagnostic purposes. A
loopback path test within the switch verifies the proper internal Fibre Channel port
logic functions and the paths between the interfaces and central memory.
The switch’s diagnostics also support external loops, which include interface cards
and their Gigabit Interface Converter (GBIC) modules in cross-port configurations.
These port-to-port diagnostics allow checking installed fiber cables and port fault
isolation.
Removing Power
Error messages are stored in RAM and are lost when power is removed from the
switch. Access the error message log to view and note any error messages before
removing power from the switch.
Status and Activity Indicators
The following status activity indicators apply to G_Port and FL_Port interface cards.
NOTE: FL_Port interface cards have an additional green light-emitting diode (LED) (vis-
ible from the front of the switch) to identify them from G_Port interface cards.
Front-Panel LED Power Indicators
The color and flash speed of the power LED, as described in Table 5-1, indicates the
switch’s status.