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PPENDIX
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T
ROUBLESHOOTING
Diagnosing Switch Indicators
Troubleshooting Chart
Symptom
Action
Power LED is Off
•
Internal or redundant power supply has failed or
is disconnected.
•
Check connections between the switch, the
power cord, the wall outlet, and the RPU if you
are using one.
•
If the switch is installed in a rack, check the
connections to the punch-down block and patch
panel.
•
Contact SMC Tech Support.
Power LED is Flashing
•
The switch is either downloading firmware or
running the Power-On Self-Diagnostics Test
(POST). If this LED does not stop flashing, then
POST has failed, and you should contact SMC
Tech Support.
Link LED is Off
•
Verify that the switch and attached device are
powered on.
•
Be sure the cable is plugged into both the switch
and corresponding device.
•
Verify that the proper cable type is used and its
length does not exceed specified limits.
•
Check the adapter on the attached device and
cable connections for possible defects. Replace
the defective adapter or cable if necessary.
Summary of Contents for 48-Port
Page 2: ......
Page 14: ...TABLE OF CONTENTS viii ...
Page 34: ...NETWORK PLANNING 2 10 ...
Page 46: ...MAKING NETWORK CONNECTIONS 4 6 ...
Page 50: ...TROUBLESHOOTING A 4 ...
Page 58: ...CABLES B 8 ...
Page 64: ...SPECIFICATIONS C 6 Warranty Limited lifetime ...
Page 66: ...SPECIFICATIONS C 8 Network Management Module Model SMC6948NMM Ports RS 232 console port ...
Page 68: ...ORDERING INFORMATION D 2 ...
Page 74: ...GLOSSARY Glossary 6 ...
Page 79: ......