Installation guide

5 – Diagnostics/Troubleshooting
Recovering a Switch
59055-00 B 5-11
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2. Inspect the AC power source. Is the power source delivering the proper
voltage?
 Yes - Continue
 No - Make necessary repairs. If the condition remains, contact your
authorized maintenance provider.
5.2.2
System Fault LED is Illuminated
The System Fault LED illuminates to indicate that the switch logic circuitry is
overheating or that a POST error has occurred. The System Fault LED is always
accompanied by a Heartbeat LED error blink code. If the System Fault LED
illuminates, Identify the Heartbeat LED error blink pattern and take the necessary
actions. Refer to ”Heartbeat LED Blink Patterns” on page 5-2.
5.3
Recovering a Switch
A switch can become inoperable or unmanageable for the following reasons:
 Firmware becomes corrupt
 IP address is lost
 Switch configuration becomes corrupt
 Forgotten password
In these specific cases, you can recover the switch using maintenance mode.
Maintenance mode temporarily returns the switch IP address to 10.0.0.1 and
provides opportunities to do the following:
 Unpack a firmware image file
 Restore the network configuration parameters to the default values
 Remove all user accounts and restore the Admin account name password to
the default.
 Copy the log file
 Restore factory defaults for all but user accounts and zoning
 Restore all switch configuration parameters to the factory default values
 Reset the switch
 Display firmware versions stored on the switch
 Select the firmware image to activate
 Update the system boot loader