Fluke DTX-1800 Technical Reference Handbook page 303

Collision rate averaging above 5 %
•
Duplex mismatch on the network.
•
Too many stations within the collision domain.
•
Faulty hub, switch, NIC, or other device.
•
Cabling is too long.
Errors detected (any rate above 0 %)
•
Cabling is too long.
•
Faulty cabling (such as intermittent wiring faults, cabling of the wrong category, or poor quality cabling)
•
Faulty or marginal network interface card (NIC).
•
Faulty or misconfigured hardware or software.
•
Electrical noise source near cabling. Use the impulse noise test to check for noise. See page 3-34.
•
Duplex mismatch on the network.
•
Bad grounding for network components.
Broadcast rate too high (acceptable rates vary among networks)
Faulty or misconfigured hardware or software.
Table 11-2. Diagnosing Low-Level Network Problems (cont.)
Verifying Network Service
Diagnosing Low-Level Network Problems
11
11-19