100 Managed Layer 3 Switch Installation Guide

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PPENDIX

ROUBLESHOOTING

Diagnosing Switch Indicators

Troubleshooting Chart

Symptom Action

PWR LED is Off • Internal power supply has failed or is disconnected.

• Check connections between the switch, the power

cord, and the wall outlet.

• Contact SMC Technical 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.

• If the switch is installed in a rack, check the

connections to the punch-down block and patch

panel.

• 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.