Cisco Catalyst 2955 Hardware Installation Manual page 193
Cisco systems switch installation guide
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Also See for Catalyst 2955:
- Installation notes (12 pages) ,
- Configuration manual (710 pages) ,
- Command reference manual (686 pages)
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Chapter 5
Troubleshooting
Table 5-1
Common Problems and Solutions (continued)
Symptom
No connectivity.
Unreadable characters on
the management console.
System LED (Uplink port
status 13 LED) is amber,
and all port LEDs are off.
System LED (Uplink port
13 LED) is amber.
78-14944-03
Possible Cause
Incorrect or bad cable.
No link at both ends.
A crossover cable was used
•
when a straight-through was
required, or vice-versa.
The cable is wired incorrectly.
•
STP checking for possible
•
loops.
Incorrect baud rate.
Corrupted software.
Fatal POST error detected.
•
Resolution
For the correct pinouts and
•
the proper application of
crossover vs.
straight-through cables, see
the
"Cable and Adapter
Specifications" section on
page
Replace it with a tested
•
good cable.
Wait 30 seconds for port
•
status LED to turn green.
Reset the terminal-emulation
software to 9600 baud.
Attach a monitor to the serial
port to display the switch boot
loader. For more information,
see the switch software
configuration guide.
Contact Cisco Systems.
•
Catalyst 2955 Hardware Installation Guide
Diagnosing Problems
B-5.
5-5
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