Troubleshooting; Understanding Post Results - Cisco Catalyst 3560 Hardware Installation Manual

Understanding POST Results

Note
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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
You can also get statistics from the browser interface, from the command-line
interface (CLI), or from a Simple Network Management Protocol (SNMP)
workstation. Refer to 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:
• Understanding POST Results, page 4-1
Diagnosing Problems, page 4-3
•
When the switch powers on, it automatically begins the power-on self test
(POST), a series of tests that verifies that the switch functions properly. 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. Call Cisco Systems if your switch does not pass
POST.
C H A P T E R
2-7.
Catalyst 3560 Switch Hardware Installation Guide
4
4-1