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Table 4-1. Troubleshooting (continued)
Symptom
Collision LED blinking
Problems with Port 8
on the Model FE508 hub
or with Port 16 on the
Model FE516 hub
Troubleshooting
Installation Guide for the Model FE508 and FE516 Fast Ethernet Hubs
LEDs
Check
Collision on
Collisions are normal on Ethernet networks and occur when two or
more computers transmit data on the network simultaneously.
Computers that caused the collision retry transmission at different
intervals until the transmission succeeds. Excessive collisions can
result when multiple hubs are cascaded and when many
computers are connected on the network. Incorrect cabling,
connectors and wiring techniques are other causes for excessive
collisions.
Check the Normal/Uplink push button on the front panel.
If you are using a straight-through cable connected to an
MDI-wired device, make sure the Normal/Uplink push button is in
the Normal position.
If you are using a straight-through cable connected to an
MDI-X-wired device, make sure the Normal/Uplink push button is
in the Uplink position.
4-3
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