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Communication Mode
The communication mode of each port (half or full duplex and
10 Mbps or 100 Mbps) must be identical to the mode of the
attached device. Verify that each port is set to the same
communication modes used by the attached device. Each
100BASE-FX port must be configured for half- or full-duplex
operation. For each 10BASE-T/100BASE-TX port, the
communication mode is configured automatically via Auto-
Negotiation. However, if the attached device does not support
Auto-Negotiation, then you must configure the port manually.
(See Chapter 4, “Configuration and Management”, for port
configuration instructions.)
Cabling
Verify that the cabling type is correct. Be sure all cable
connectors are securely seated in the required ports. Also
check to be sure you are using the proper cable type: straight-
through or crossover. Use Category 5 twisted-pair cable for
100BASE-TX connections and Category 3, 4 or 5 cable for
10BASE-T connections. Use 62.5/125 micron core multimode
fiber cable for 100BASE-FX connections.
Make sure all devices are connected to the network. Equipment
may have been disconnected unintentionally.
Network Cards
Make sure the network interface hardware and software drivers
for the attached devices are functioning properly. Check the
network cards and associated drivers used in any attached
workstation or server.
Physical Configuration
If problems occur after altering the network configuration,
restore the original connections, and try to track the problems
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ROUBLESHOOTING
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