System information

Troubleshooting Hardware and Booting Problems 3-31
Catalyst 3000 Series Startup
• Processor and interface subsystem—This subsystem includes the supervisor engine module
(which contains the system operating software), the network interfaces, and all associated
cabling.
Table 3-6 outlines the areas where Catalyst 5000 series startup problems may occur and describes
solutions to those problems.
Table 3-6 Hardware: Catalyst 5000 Series Startup Problems and Solutions
Catalyst 3000 Series Startup
When you start up a Catalyst 3000 series LAN switch, the following should occur:
• The Power LED should come on.
Possible Problem Area Solution
Power subsystem
Step 1 Check to see whether the PS1 LED is on. If it is not, ensure that the
power supply is connected properly and is flush with the back of the
chassis. Make sure that captive installation screws are tight.
Step 2 Check the AC source and the power cable. Connect the power cord to
another power source if one is available and turn the power back on. If
the LED fails to go on after you connect the power supply to a new
power source, replace the power cord.
Step 3 If the LED fails to go on when the switch is connected to a different
power source with a new power cord, the power supply is probably
faulty. If a second power supply is available, install it in the second
power supply bay and contact a customer service representative for
further instructions.
Step 4 Repeat these steps for the second power supply if present.
Cooling subsystem
Step 1 Check to see whether the Fan LED on the supervisor engine module is
green. If it is not, check the power subsystem to see whether it is
operational.
Step 2 If the Fan LED is red, the fan assembly might not be seated properly
in the backplane.
To ensure that the fan assembly is seated properly, loosen the captive
installation screws, remove the fan assembly, and reinstall it. Tighten
all captive installation screws and restart the system.
Step 3 If the Fan LED is still red, the system has probably detected a fan
assembly failure. Contact a technical support representative for
assistance.
Processor and interface
subsystem
Step 1 Check the supervisor engine module Status and Link LEDs. These
should both be green if all diagnostic and self-tests were successful
and ports are operational. For more information about interpreting the
supervisor engine module LEDs, refer to the user guide for your
switch.
Step 2 Check the LEDs on individual interface modules. In most cases these
should be green (or should flicker green, in the case of Transmit and
Receive LEDs) if the interface is functioning correctly. For detailed
information on interpreting interface module LEDs, refer to the user
guide for your switch.
Step 3 Check all cabling and connections. Replace any faulty cabling.