Chapter 9: Troubleshooting - Allied Telesis AT-x510-28GTX Installation Manual

Chapter 9
Troubleshooting
This chapter contains suggestions on how to troubleshoot the switch if a
problem occurs.
Note
For further assistance, please contact Allied Telesis Technical
Support at www.alliedtelesis.com/support.
Problem 1: The Switch ID LED on the front of the switch is off.
Solutions: The unit is not receiving power. Try the following:
Verify that the power cord is securely connected to the power

source and to the AC connector on the back panel of the switch.
Verify that the power outlet has power by connecting another

device to it.
Try connecting the unit to another power source.

Try a different power cord.

Verify that the voltage from the power source is within the required

levels for your region.
Problem 2: All the port LEDs are off even though the ports are connected
to active network devices.
Solution: The switch may be operating in the low power mode. To toggle
on the LEDs, press the eco-friendly button on the front panel of the switch.
You may also toggle the LEDs off and on with the ECOFRIENDLY LED
and NO ECOFRIENDLY LED commands in the command line interface.
Problem 3: The SHOW STACK command is not displaying all the
switches in the stack.
Solutions: One or more switches cannot join the stack. Try the following:
Verify that the stacking transceivers in the S1 and S2 slots of the

switches are properly cabled. The stacking cables must cross over
to different slots on the switches. For instructions, refer to Chapter
6, "Cabling the Stacking Ports" on page 91.
Verify that the transceivers are fully inserted into the S1 and S2

slots.
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