Cisco WS-C3560X-48PF-L Hardware Installation Guide - Page 81

Troubleshooting, Diagnosing Problems, Switch POST Results, Switch LEDs

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Troubleshooting 4 C H A P T E R • Diagnosing Problems, page 4-1 • Resetting the Switch to the Factory Default Settings, page 4-5 • Finding the Switch Serial Number, page 4-6 • Replacing a Failed Data Stack Member (Catalyst 3750-X Switches), page 4-6 Diagnosing Problems The switch LEDs 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, the CLI, or 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. 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 Status LED turns green. The System LED blinks green, and the other LEDs stay green. When POST completes successfully, the System LED remains green. The XPS LED is 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 turn amber. Note POST failures are usually fatal. Contact your Cisco technical support representative if your switch does not pass POST. Switch LEDs Look at the port LEDs for information when troubleshooting the switch. See the "LEDs" section on page 1-9 for descriptions of the LED colors and their meanings. OL-19593-02 Catalyst 3750-X and 3560-X Switch Hardware Installation Guide 4-1

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CHAPTER
4-1
Catalyst 3750-X and 3560-X Switch Hardware Installation Guide
OL-19593-02
4
Troubleshooting
•
Diagnosing Problems, page 4-1
•
Resetting the Switch to the Factory Default Settings, page 4-5
•
Finding the Switch Serial Number, page 4-6
•
Replacing a Failed Data Stack Member (Catalyst 3750-X Switches), page 4-6
Diagnosing Problems
The switch LEDs 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, the CLI, or 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.
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 Status LED turns green. The System LED blinks green, and the other
LEDs stay green.
When POST completes successfully, the System LED remains green. The XPS LED is 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 turn amber.
Note
POST failures are usually fatal. Contact your Cisco technical support representative if your switch does
not pass POST.
Switch LEDs
Look at the port LEDs for information when troubleshooting the switch. See the
“LEDs” section on
page 1-9
for descriptions of the LED colors and their meanings.