Installation guide

3-3

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-01

Chapter 3 Troubleshooting

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. For a full description of the switch LEDs, see the “LEDs” section

on page 1-15.

You can also get statistics from the browser interface, 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.

You can access the Technical Support Website

(http://www.cisco.com/techsupport) for a list of known hardware problems and

extensive troubleshooting documentation including:

• Field notices

• Security advisories

• Troubleshooting resources

• Factory defaults

• Password recovery

• Recovery from corrupted or missing software

• Switch port problems

• Network interface cards

• Troubleshooting tools

Common switch problems fall into these categories:

• Poor performance

• No connectivity

• Corrupted software

Table 3-1 describes how to detect and resolve these problems.