Switch User Manual

ROUBLESHOOTING

A-2

Diagnosing Power Problems with the LEDs

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

as follows.

Stack Link LED is

Flashing Green/Amber

• The uplink/downlink has failed.

• 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.

Table A-2 Power/RPU 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.

Table A-1 Troubleshooting Chart (Continued)

Symptom Action