Chapter 5 Troubleshooting

Troubleshooting the Fan Assembly

If the show module command output shows a message that states "not enough power for module," check the “Catalyst 4500 Power Supplies” section on page A-6for the minimum power requirements for the power supply. There may be a problem with the power source itself.

Power Supply Mixing

The 1400 W DC multi-input supply can not be used with other power supply types, but other power supplies in this product line work with the other types during an upgrade. If you mix power supplies in a Catalyst 4500 series chassis, the switch detects the type of power supply in power supply bay 1 (PS1) and ignores the power supply in power supply bay 2 (PS2) while issuing system messages and showing the power supply in bay 2 as in the err-disable state in the output of the show power command. When the power supply in bay 1 is removed, the switch recognizes the power supply in bay 2, and you may then put a new matching power supply in bay 1. Both supplies should resume normal function.

Troubleshooting the Fan Assembly

Note All fans must be operating or a failure will occur.

Environmental problems may initially appear to be problems with the fan tray. To help isolate a fan assembly problem, follow these steps:

Step 1 Check the status LED on the fan tray.

If the LED is off and the rest of the system is functioning, the fan tray is not getting power or is not seated correctly on the backplane.

If the LED is green, the fans are operating normally. There may be conditions impairing fan performance, but they are minimal in impact.

If the LED is red, one or more fans have failed.

Step 2 Connect a terminal and determine the fan tray status shown by the show environment status CLI command. The status and sensor columns should say good.

Step 3 Determine whether the airflow is restricted or if the ambient temperature in the room is too warm.

Step 4 Determine whether the power supply is functioning properly. See the “Troubleshooting the Power Supply” section on page 5-4.

Step 5 Verify that the fan assembly is properly seated in the backplane by loosening the captive installation screws, removing the fan assembly, and reinstalling it.

Step 6 Restart the system.

Step 7 Verify that all fans are operating. You should hear the fans at system start.

Step 8 If the system is still detecting a fan assembly failure, check for details using the CLI and contact the Cisco TAC for assistance.

Catalyst 4500 E-Series Switches Installation Guide

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Cisco Systems WSUPOE12VPSPL, 4500 E-Series manual Troubleshooting the Fan Assembly, Power Supply Mixing

4500 E-Series, WSUPOE12VPSPL specifications

Cisco Systems has long been at the forefront of networking technology, consistently delivering innovative products that shape the future of digital communication. Among its extensive range of offerings, the WSUPOE12VPSPL and the Catalyst 4500 E-Series stand out as exemplary solutions tailored for businesses seeking robust, scalable, and versatile network infrastructure.

The WSUPOE12VPSPL is a 12-port Power over Ethernet (PoE) switch that provides significant advantages for organizations looking to streamline their operations. It is designed to deliver power and data over a single cable, reducing the clutter of additional power supplies and cords. This efficiency not only simplifies deployment but also enhances the flexibility to place devices anywhere within the network environment, making it an ideal choice for powering IP phones, wireless access points, and surveillance cameras.

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