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CHAPTER
3-1
Catalyst 3750 Switch Hardware Installation Guide
OL-6336-07
3
Troubleshooting
The LEDs on the front panel provide troubleshooting information about the switch. They show failures
in the power-on self-test (POST), port-connectivity problems, and overall switch performance. For a full
description of the switch LEDs, see the “LEDs” section on page 1-13.
You can also get statistics from the browser interface, from the command-line interface (CLI), or from
a Simple Network Management Protocol (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.
This chapter describes these topics for troubleshooting problems:
• Diagnosing Problems, page 3-1
• Clearing the Switch IP Address and Configuration, page 3-6
• Replacing a Failed Stack Member, page 3-6
• Finding the Switch Serial Number, page 3-7
Diagnosing Problems
The LEDs on the front panel provide troubleshooting information about the switch. They show power-on
self-test (POST) failures, port-connectivity problems, and overall switch performance. You can also get
statistics from the CLI or from an SNMP workstation. See the software configuration guide and the
switch command reference on Cisco.com or the documentation that came with your SNMP application
for more information.
This section includes these troubleshooting topics:
• “Verify Switch POST Results” section on page 3-2
• “Monitor Switch LEDs” section on page 3-2
• “Verify Switch Connections” section on page 3-2
• “Monitor Switch Performance” section on page 3-5