Operation Manual

Verifying Network Service
Diagnosing Low-Level Network Problems
11-19
11
Table 11-2. Diagnosing Low-Level Network Problems (cont.)
• Duplex mismatch on the network.
• Too many stations within the collision domain.
• Faulty hub, switch, NIC, or other device.
• Cabling is too long.
• 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.
Faulty or misconfigured hardware or software.
Collision rate averaging above 5 %
Errors detected (any rate above 0 %)
Broadcast rate too high (acceptable rates vary among networks)