Cisco Systems 3110G, 3012 Troubleshooting, Diagnosing Problems, Verify Switch Module POST Results

C H A P T E R 3

Troubleshooting

This chapter describes these switch module troubleshooting topics:

•Diagnosing Problems, page 3-1

•Resetting the Switch Module, page 3-4

•How to Replace a Failed Stack Member, page 3-5

Diagnosing Problems

The LEDs on the front panel provide troubleshooting information about the switch module. They show POST failures, port-connectivity problems, and fault indications. You can also get information from the device manager, from the CLI, or from an SNMP workstation. See the switch module software configuration guide and the command reference guide on Cisco.com or the documentation that came with your SNMP application for details.

Verify Switch Module POST Results

As the switch module powers on, it begins the power-on self-test (POST), a series of tests that runs automatically to ensure that the switch module functions properly. It might take several minutes for the switch module to complete POST. When POST completes successfully, the System LED remains green. The other LEDs turn off and return to their operating status. If the switch module fails POST, the System LED is amber.

Note POST failures are usually fatal. Contact your Cisco technical support representative if your switch module does not pass POST.

Verify Switch Module LEDs

If you have physical access to the switch module, look at the port LEDs for troubleshooting information about the switch module. See the “Switch Module LEDs” section on page 1-5for a description of the LED colors and their meanings.

Catalyst Switch Module 3110G, 3110X, and 3012 for IBM BladeCenter Hardware Installation Guide

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