Allied Telesis AT-PWR06, AT-DC2552XS, AT-FAN06 manual Troubleshooting, Chapter

Chapter 7

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. Refer to “Contacting Allied Telesis” on page 13.

Problem: The NET MGMT twisted pair port on the switch is connected to a network device but the port’s LINK/ACT LED is off.

Solutions: The port is unable to establish a link to a network device. Try the following:

Verify that the network device connected to the twisted pair port is powered on and is operating properly.

Verify that the port is connected to the correct twisted pair cable. This is to eliminate the possibility that the port is connected to the wrong network device.

Try connecting another network device to the twisted pair port with a different cable. If the twisted pair port is able to establish a link, then the problem is with the cable or the other network device.

Verify that the twisted pair cable does not exceed 100 meters (328 feet).

Verify that you are using the appropriate category of twisted pair cable. The cable types are listed in Table 1 on page 22 for the 10/ 100Base-TX ports and Table 1 on page 22 for the 10/100/ 1000Base-T ports.

Problem: The LINK/ACT LED for a SFP+ transceiver is off.

Solutions: The fiber optic port on the module is unable to establish a link to a network device. Try the following:

Verify that the network device connected to the fiber optic port is operating properly.

Verify that the fiber optic cable is securely connected to the port on the SFP+ transceiver and to the port on the remote network device.

Check that the SFP module is fully inserted in the slot.

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