Diagnosing Problems - Cisco Catalyst WS-C2924-XL Hardware Installation Manual

Diagnosing Problems

Table 3-2 Common Problems and Their Solutions
Symptom
Poor Performance or
Excessive Errors.
Catalyst 2900 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 100BASE-TX connections:
•
The distance between the port and the
•
attached device exceeds 328 feet
(100 meters).
If the switch is attached to a repeater,
•
the total distance between the two
end stations exceeds the 100BASE-T
cabling guidelines.
For 10BASE-T connections: The
•
distance between the port and the
attached device exceeds 328 feet
(100 meters).
Bad adapter in attached device.
Excessive errors found in port
•
statistics.
STP checking for possible loops.
•
Chapter 3 Troubleshooting
Resolution
Refer to the Catalyst 2900 Series
XL and Catalyst 3500 Series XL
Software Configuration Guide for
information on identifying
autonegotiation mismatches.
Refer to the Catalyst 2900
•
Series XL and Catalyst 3500
Series XL Software
Configuration Guide for
information on displaying
port statistics.
Reduce the cable length to
•
within the recommended
distances.
Refer to your 100BASE-T
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.
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