Dell PowerVault 50F (Fibre Channel Switch) - Manual (Page 68)

Troubleshooting: Dell™ PowerVault™ 50F 8-Port Fibre Channel Switch Installation and Troubleshooting Guide
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Troubleshooting: Dell™ PowerVault™ 50F 8-Port Fibre Channel
Switch Installation and Troubleshooting Guide
Overview • Diagnostic overview • Status and activity indicators
Overview
This chapter discusses troubleshooting, diagnostic testing, and error messages, including the following
sections:
Diagnostic overview
Status and activity indicators
Diagnostic Overview
The switch is designed for maintenance-free operation. When there is a suspected failure, the switch has
self-diagnostic capabilities to aid in isolating any equipment or Fabric failures.
The switch supports power-on self-tests (POSTs) and diagnostic tests. The diagnostic tests determine the
switch's status and isolate problems.
Telnet commands are used to determine the switch's status, error conditions, and switch operating statistics.
Issuing Telnet Commands
Telnet commands (see " PowerVault™ 50F 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
After all data transferring processes external to the switch are completed, removing power from the switch
does not disrupt the Fabric.