Cisco 2970 Hardware Installation Guide - Page 93

No Connectivity., Amber System LED., Amber Module Slot LED., Unreadable Characters, on the Management

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Chapter 3 Troubleshooting Diagnosing Problems 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. Possible Cause Resolution 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. • 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. Corrupted software. Use the show POST EXEC command to see which test failed. Module not seated in module slot. Tighten the thumb screws on the module front panel. Incorrect baud rate. Reset the emulation software to 9600 baud. Telephone cable loose or not connected properly. Reseat telephone cable into telephone wall jack and Cisco LRE CPE. Telephone cable defective. Replace telephone cable. Cable trunking defective. Repair cable trunking or select an alternative pair. Cisco LRE CPE not communicating with or might be attempting to exceed rate or reach selected by the Catalyst 2900 LRE XL switch. Verify switch and upstream network status. 78-6461-04 Catalyst 2900 Series XL Hardware Installation Guide 3-5

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3-5
Catalyst 2900 Series XL Hardware Installation Guide
78-6461-04
Chapter 3
Troubleshooting
Diagnosing Problems
No Connectivity.
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.
•
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.
Amber System LED.
Corrupted software.
Use the
show POST
EXEC
command to see which test failed.
Amber Module Slot LED.
Module not seated in module slot.
Tighten the thumb screws on the
module front panel.
Unreadable Characters
on the Management
Console.
Incorrect baud rate.
Reset the emulation software to
9600 baud.
LRE LED not turned on.
Telephone cable loose or not connected
properly.
Reseat telephone cable into
telephone wall jack and Cisco
LRE CPE.
Telephone cable defective.
Replace telephone cable.
Cable trunking defective.
Repair cable trunking or select an
alternative pair.
Cisco LRE CPE not communicating with
or might be attempting to exceed rate or
reach selected by the Catalyst 2900 LRE
XL switch.
Verify switch and upstream
network status.
Table 3-2
Common Problems and Their Solutions (continued)
Symptom
Possible Cause
Resolution