Table of Contents

Troubleshooting the Installation

This chapter describes how to troubleshoot the Catalyst 2948G, 2948G-GE-TX, and 2980G switch installations. It contains these sections:

If you have problems starting up your system, use the information in this chapter to help isolate the cause. Problems with the initial startup are often caused by poor or improper connections. Temperature conditions above the maximum acceptable level are rarely the source of problems at startup; however, environmental monitoring functions are included in the following sections because they also monitor DC-line voltages.

For configuration questions or problems, refer to the software configuration guide or the command reference for your switch.

Getting Started

When the initial system boot is complete, verify the following:

If all of these conditions are met and the hardware installation is complete, refer to the software configuration guide and the command reference for your switch to troubleshoot the software. However, if any of these conditions is not met, use the procedures in this chapter to isolate and, if possible, resolve the problem.

Problem Solving to the System Component Level

The key to success when troubleshooting the system is to isolate the problem to a specific system component. The first step is to compare what the system is doing to what it should be doing. Because a startup problem can usually be attributed to a single component, it is more efficient to isolate the problem to a subsystem rather than troubleshoot each component in the system separately.

The switch consists of the following subsystems:

The following are simple checks you can make to determine if there is a fan problem:

If you encounter a problem in performing any of the above checks, you should contact a customer service representative.

Identifying Startup Problems

LEDs indicate all system states in the startup sequence. By checking the LEDs, you can determine when and where the system failed in the startup sequence. If you have problems after the switch is powered on and the startup sequence is complete, refer to the software configuration guide for your switch.

After you connect the power cord to the Catalyst 2948G, 2948G-GE-TX, or 2980G switches, follow these steps:

Step 2   Check the power supply LEDs as follows:

Step 3   Check that the LEDs on the front panel light as follows:

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Note    After the diagnostic boot tests, the single flash of amber on the Link LED may occur too quickly to be detected visually.

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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:

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Note    Power supply LEDs are labeled PSI, PWR, and RPS.

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If the LED then lights, the problem is the first power source.

If the LED still fails to light, the power supply is probably faulty.

Step 2   If a Redundant Power System (RPS) is installed, check the RPS LED:

If the LED is amber or off, repeat the previous procedure to troubleshoot the second power supply.

Note   If the power supply is a Cisco RPS 675 and the LED is amber, the RPS may be in standby mode. Press the Standby/Active button on the RPS to put it in active mode and the LED should then turn to green.

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Note    If you are using an RPS, do not apply power to the RPS and the switch simultaneously. Disconnect power from the internal power supply before turning the power on for the RPS. The RPS contains multiple power supplies for redundant power protection. Refer to the RPS documentation for installation and configuration details.

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Step 3   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 customer service representative assist you as quickly as possible: