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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide
OL-21561-02
Appendix C Troubleshooting the Installation
Troubleshooting the Power Supply
Step 2 Verify that the LEDs on the front panel are lit:
• The STATUS LED flashes orange during diagnostic boot tests. It is green when the switch is
operational (online). If the system software is unable to start up, this LED stays orange.
• The port LEDs (1-48 plus the 4 SFP/SFP+ ports) are green when the port is operational (online). If
no signal is detected, the LINK LED is off. The port LED remains orange if the port is disabled. The
port orange flashes yellow if the port tested faulty at startup.
Step 3 If a STATUS LED is red, contact a customer service representative for instructions.
Step 4 If the boot information and system banner are not displayed, verify that the terminal is set correctly and
that it is connected properly to the console port.
Troubleshooting the Power Supply
To help isolate a power subsystem problem, follow these steps:
Step 1 Verify that the power supply is plugged in and that the on/off switch is set to ON (if the power supply is
an AC-input power supply).
Step 2 Look at the power supply LED (PS1 or PS2). If the LED is off or if the LED is red, unplug the power
cord, and then plug the power cord in. Be sure the on/off switch is OFF before removing the power cord
from the power supply.
If the LED remains off, there might be a problem with the AC or DC source or the power cable.
Step 3 Connect the power cord to another power source if one is available.
Step 4 If the LED then lights, the problem is the first power source.
Step 5 If the LED fails to light after you connect the power supply to a new power source, replace the power
cord.
If the LED still fails to light when the switch is connected to a different power source with a new power
cord, the power supply is probably faulty.
Step 6 If you are unable to resolve the problem, contact a customer service representative for instructions.
Contacting Customer Service
If you are unable to solve a startup problem after using the troubleshooting suggestions in this chapter,
contact a customer service representative for assistance and further instructions. Before you call, have
the following information ready to help your service provider assist you as quickly as possible:
• Date you received the switch
• Chassis serial number (located on a label on the top of the chassis
• Type of software and release number
• Maintenance agreement or warranty information
• Brief description of the problem
• Brief explanation of the steps you have already taken to isolate and resolve the problem