Allied Telesis AT-x510-52GTX Installationsanleitung PDF herunterladen (Seite 82)

Chapter 6: Troubleshooting

 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 24 for the 10/

100/1000Base-T ports.

Note

A 1000Base connection may require five to ten seconds to establish

a link.

Problem 4: The LINK/ACT LED for an SFP or SFP+ transceiver is off.

Solutions: The fiber optic port on the transceiver is unable to establish a

link to a network device. Try the following:

 Verify that the remote 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 or SFP+ module and to the port on the remote network

device.

 Check that the transceiver is fully inserted in the slot.

 If you are using SFP+ slots 27 or 28 on the 28-port switches or

slots 51 and 52 on the 52-port switches, check that VCStack is

disabled on the switch. The VCStack feature has to be disabled

before you can use these slots for regular SFP or SFP+

transceivers. For instructions, refer to “Configuring the Switch for

Stand-alone Operations” on page 74

 Verify that the operating specifications of the fiber optic ports on

the transceiver and remote network device are compatible.

 Verify that the correct type of fiber optic cabling is being used.

 Verify that the port is connected to the correct fiber optic cable.

This is to eliminate the possibility that the port is connected to the

wrong remote network device.

 Try connecting another network device to the fiber optic port using

a different cable. If the port is able to establish a link, then the

problem is with the cable or with the other network device.

 Use the switch’s management software to verify that the port is

enabled.

 If the remote network device is a managed device, use its

management firmware to determine whether its port is enabled.

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Allied Telesis AT-x510-52GTX Installationsanleitung Seite 82