Cisco Catalyst 3550 Hardware Installation Manual page 53
Cisco systems multilayer switch user manual
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Also See for Catalyst 3550:
- Command reference manual (794 pages) ,
- Installation manual (154 pages) ,
- Hardware installation manual (106 pages)
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Chapter 3
Troubleshooting
Table 3-1
Table 3-1
Problem
System LED is not on, and the
switch does not run POST.
System LED is amber.
OL-6155-01
describes some common problems and their solutions.
Common Problems and Solutions
Solution
•
•
•
•
•
•
Check that the power cable is connected to the switch and to a
known power source.
Test the power cable on another switch.
Connect a working power cable from another switch.
An internal fan fault is detected. Either check the switch itself,
or use the show env user EXEC command to check for a failed
fan.
The switch might be overheating. Use the show env user EXEC
command to check for an overtemperature condition. If there is
an overtemperature condition:
Place the switch in an environment that meets the
–
environmental requirements given in
"Technical Specifications."
Make sure that the fan intake and exhaust areas are clear.
–
A fatal POST error is detected. See the
Results" section on page
3-1.
Catalyst 3550 Switch Hardware Installation Guide
Diagnosing Problems
Appendix A,
"Understanding POST
3-3
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