Cisco Catalyst 3550 Hardware Installation Manual page 58
Multilayer switch
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Also See for Catalyst 3550:
- Command reference manual (794 pages) ,
- Installation manual (154 pages) ,
- Hardware installation manual (86 pages)
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Diagnosing Problems
Table 3-2
Common Problems and Their Solutions
Symptom
Poor performance or excessive
errors.
Catalyst 3550 Multilayer Switch Hardware Installation Guide
3-4
Possible Cause
Duplex autonegotiation mismatch.
Cabling distance exceeded.
Port statistics show excessive
•
frame check sequence (FCS),
late-collision, or alignment
errors.
For 10/100/1000BASE-T
•
connections:
The distance between the
–
port and the attached device
exceeds 100 meters.
–
If the switch is attached to a
repeater, the total distance
between the two end
stations exceeds the cabling
guidelines.
For GBIC port connections:
•
–
The distance between the
GBIC port and the attached
device exceeds the GBIC
cabling guidelines.
Bad adapter in attached device.
Excessive errors found in port
•
statistics.
STP checking for possible
•
loops.
Chapter 3
Troubleshooting
Resolution
Refer to the Catalyst 3550
Multilayer Switch Software
Configuration Guide for
information on identifying
autonegotiation mismatches.
Refer to the Catalyst 3550
•
Multilayer Switch Software
Configuration Guide for
information on displaying
port statistics.
Reduce the cable length to
•
within the recommended
distances.
•
Refer to your repeater
documentation for cabling
guidelines.
•
Refer to your GBIC
documentation for cabling
guidelines.
Run adapter card diagnostic
•
utility.
Wait 30 seconds for the port
•
LED to turn green.
78-11358-01
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