Appendix A: Troubleshooting

Diagnosing Switch Indicators

 

Table A-1 Troubleshooting Chart

 

 

Symptom

Action

 

 

Power LED is Off

• Check connections between the switch, the power cord, and the wall

 

outlet.

 

• Contact your dealer for assistance.

 

 

Power LED is Amber

• Internal power supply has failed. Contact your local dealer for

 

assistance.

 

 

Diag LED is Amber

• Power cycle the switch to try and clear the condition.

 

• If the condition does not clear, contact your local dealer for assistance.

 

 

Stack Master LED is Flashing

• The stack has not completed its initial configuration. Wait a few

Amber

minutes for the process to complete.

 

• Check that all stacking cables are properly connected.

 

 

Stack Link LED is Flashing

• The uplink/downlink has failed.

Green/Amber

• For the indicated stack link, check that the stacking cables are properly

 

connected. Replace the stacking cable if necessary.

 

• Power cycle the switch to try and clear the condition.

 

 

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.

 

 

Diagnosing Power Problems with the LEDs

The Power and RPU LEDs work in combination to indicate power status as follows.

 

 

Table A-2 Power/RPS LEDs

 

 

 

Power LED

RPU LED

Status

Green

Green

Internal power functioning normally; RPU is present.

 

 

 

Green

Amber

Internal power functioning normally; RPU plugged in but faulty.

 

 

 

Green

Off

Internal power functioning normally; RPU not plugged in.

 

 

 

Amber

Green

Internal power faulty; RPU delivering power.

 

 

 

Off

Off

Both internal power and RPU unplugged or not functioning.

 

 

 

A-1

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SMC Networks SMC8950EM, SMC8926EM manual Appendix a Troubleshooting, Diagnosing Switch Indicators

SMC8926EM, SMC8950EM specifications

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