Troubleshooting
4-3
General Guidelines
Factors affecting network performance include wiring problems, software or hardware
problems on the device or network interface card, inclusion of pre-10BaseT devices
on a 10BaseT network, and incorrect hub configuration.
Wiring Problems and Solutions
• Degraded network performance. Check to see whether stranded wire has
been used. Use only solid conductor wire.
Check for electrical interference (EMI) from
high-powered machinery near network links.
Ensure that such machinery is placed at a
distance, or purchase cable with more EMI
shielding. Building may need to be earth-
grounded.
Make sure that physical connections are in
place, tightly attached, and properly
terminated. Use well-built cables with strong
cable/connector joints and good EMI
shielding. Place away from high-activity areas
of the building, to avoid mechanical damage.
See Chapter 1, "Quick Start " for wiring for
star and thin backbone networks. See
Chapter 3: "Network Planning," for other
configurations.
Ensure that your network is within 802.3
specifications for segment lengths and the
like. Table 3-1 lists specifications for all
supported Ethernet media types.
• Unable to establish link on one or more
connections (lengths over 15 ft.)
See above
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