
Chapter 3 Troubleshooting
Diagnosing Problems
Table
Table
Symptom | Possible Cause | Resolution |
|
|
|
Poor performance or excessive | Duplex autonegotiation mismatch. | See the switch software |
errors |
| configuration guide for |
|
| information on identifying |
|
| autonegotiation mismatches. |
|
|
|
| Cabling distance exceeded |
|
| • Port statistics show excessive | • See the switch software |
| frame check sequence (FCS), | configuration guide for |
| information on displaying | |
| errors. | port statistics. |
| • For |
|
| connections: |
|
| – The distance between the | • Reduce the cable length to |
| port and the attached device | within the recommended |
| exceeds 328 feet (100 | distances. |
| meters). |
|
| – If the switch is attached to a | • See your repeater |
| repeater, the total distance | documentation for cabling |
| between the two end | guidelines. |
| stations exceeds the cabling |
|
| guidelines. |
|
| • For SFP module port | • See your SFP module |
| connections: | documentation for cabling |
| – The distance between the | guidelines. |
|
| |
| SFP module port and the |
|
| attached device exceeds the |
|
| SFP module cabling |
|
| guidelines. |
|
|
|
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Cisco ME 2400 Ethernet Access Switch Hardware Installation Guide
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