Cisco Systems 3750-E, 3560-E manual Diagnosing Problems, Check Switch Post Results

C H A P T E R 4

Troubleshooting

This chapter describes these Catalyst 3750-E and Catalyst 3560-E switch troubleshooting topics:

•Diagnosing Problems, page 4-1

•How to Clear the Switch IP Address and Configuration, page 4-5

•Finding the Switch Serial Number, page 4-6

•How to Replace a Failed Stack Member, page 4-6

Diagnosing Problems

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

Check Switch POST Results

As the switch powers on, it begins the power-on self-test (POST), a series of tests that runs automatically to ensure that the switch functions properly. It might take several minutes for the switch to complete POST.

When the switch begins POST, the switch status LEDs turn green. The System LED blinks green, and the other LEDs remain continuous green.

When POST completes successfully, the System LED remains green. The RPS LED remains green for some time and then returns to its operating status. The other LEDs turn off and return to their operating status. If the switch fails POST, the System and Ethernet management port LEDs are amber.

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

Catalyst 3750-E and Catalyst 3560-E Switch Hardware Installation Guide

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