Diagnosing Problems - Cisco 3524XL - Catalyst Enterprise Edition Switch Hardware Installation Manual

Diagnosing Problems

Table 3-2 Common Problems and Their Solutions
Symptom
Poor performance or excessive
errors.
Catalyst 3500 Series XL 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 100BaseTX 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
100BaseT cabling
guidelines.
For 10BaseT connections: The
•
distance between the port and
the attached device exceeds 100
meters.
Bad adapter in attached device.
• Excessive errors found in port
statistics.
STP checking for possible
•
loops.
Chapter 3 Troubleshooting
Resolution
See the Cisco IOS Desktop
Switching Software
Configuration Guide for
information on identifying
autonegotiation mismatches.
See the Cisco IOS Desktop
•
Switching Software
Configuration Guide for
information on displaying
port statistics.
• Reduce the cable length to
within the recommended
distances.
See your 100BaseT repeater
documentation for cabling
guidelines.
• Reduce the cable length to
within the recommended
distances.
Run adapter card diagnostic
•
utility.
Wait 30 seconds for LED to
•
turn green.
78-6456-03