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CHAPTER 5: TROUBLESHOOTING
This chapter provides information about troubleshooting the Model FS518T
Fast Ethernet Switch.Table 5-1 lists symptoms, causes, and solutions of
possible problems.
Table 5-1. Troubleshooting Information
Symptom Cause Solution
Power LED is off. No power is received Check the power cord connections for the switch and
at the hub. the connected device.
Check for a defective adapter card, cable, or port by
testing them in an alternate environment where all
products are functioning.
Make sure all cables used are correct and comply
with Ethernet specifications.
Either 10M, 100M, Port connection is Check the crimp on the RJ-45 connectors, and make
or 1000M Link LED not functioning. sure that the plug is properly inserted and locked into
is off or intermittent. the port at both the switch and the connecting device.
Make sure all cables used are correct and comply
with Ethernet specifications.
One or more Not all system Test the components in an alternate environment
components are components are where all other components are functioning properly.
malfunctioning. properly installed.
A segment or device One or more devices Verify that the cabling is correct (refer to
is not recognized as are not properly Appendix C,“Cabling Guidelines”).
part of the network. connected or cabling
Be sure all cable connectors are securely positioned
does not meet
in the required ports. Straight-through cables should
Ethernet guidelines.
be used for all standard twisted pair connections.
Make sure all devices are connected to the network.
Equipment may have been accidentally disconnected.
troubleshooting 5-1
FS518T.Manual.FINAL 5/19/00 12:55 PM Page 31