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Cisco Catalyst WS-C2924-XL Hardware Installation Manual page 93

Catalyst 2900 series xl hardware installation guide
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Chapter 3
Troubleshooting
Table 3-2
Common Problems and Their Solutions (continued)
Symptom
No Connectivity.
Amber System LED.
Amber Module Slot LED.
Unreadable Characters
on the Management
Console.
LRE LED not turned on.
78-6461-04
Possible Cause
Incorrect or bad cable.
The following are indicated by 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.
•
Corrupted software.
Module not seated in module slot.
Incorrect baud rate.
Telephone cable loose or not connected
properly.
Telephone cable defective.
Cable trunking defective.
Cisco LRE CPE not communicating with
or might be attempting to exceed rate or
reach selected by the Catalyst 2900 LRE
XL switch.
Resolution
•
•
•
Use the show POST EXEC
command to see which test failed.
Tighten the thumb screws on the
module front panel.
Reset the emulation software to
9600 baud.
Reseat telephone cable into
telephone wall jack and Cisco
LRE CPE.
Replace telephone cable.
Repair cable trunking or select an
alternative pair.
Verify switch and upstream
network status.
Catalyst 2900 Series XL Hardware Installation Guide
Diagnosing Problems
For the correct pinouts and
the proper application of
crossover or straight-through
cables, see the "Crossover
and Straight-Through Cable
Pinouts" section on page B-3.
Replace with a tested good
cable.
Wait 30 seconds for the LED
to turn green.
3-5

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