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Troubleshooting
This chapter describes these topics for troubleshooting problems:
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Diagnosing Problems
The LEDs on the switch module front panel provide troubleshooting information. They show power-on
self-test (POST) failures, port-connectivity problems, and overall switch module 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:
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•
•
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Verify the Switch Module POST Results
As the switch module powers on, it begins the 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 system LED slowly blinks green. When POST completes, the system
LED blinks amber. If POST fails, the system LED remains amber. If POST completes successfully, the
system LED rapidly blinks green.
POST failures are usually fatal. Contact your Cisco technical support representative if your switch does
Note
not pass POST.
OL-12246-01
Diagnosing Problems, page 3-1
Clearing the Switch Module IP Address and Configuration, page 3-5
Replacing a Failed Stack Member, page 3-5
Locating the Switch Module Serial Number, page 3-6
Verify the Switch Module POST Results, page 3-1
Look at the Switch Module LEDs, page 3-2
Confirm the Switch Module Connections, page 3-2
Verify the Switch Module Performance, page 3-4
C H A P T E R
Cisco Catalyst Blade Switch 3120 for HP Hardware Installation Guide
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- Switch Module Features Overview
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Troubleshooting
