Allied Telesis IE340 Series, Руководство по установке, Страница: 121 / 136

Chapter 6: Troubleshooting
121
Twisted Pair Ports
Problem: The switch is powered on and forwarding traffic, but all the port
LEDs are off.
Solutions: The port LEDs may have been turned off with the
ECOFRIENDLY LED command in the AlliedWare Plus operating system.
To turn on the LEDs, establish a management session with the unit and
issue the NO ECOFRIENDLY LED command in the Global Configuration
mode. The default setting for the LEDs is on.
Problem: A 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 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.

Verify that the network device connected to the twisted pair port is
powered on and is operating properly.

Verify that the network cable is securely connected to the ports on
the switch and remote 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. Refer to “Cable Requirements” on page 28.

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 verify that its port is enabled.
Note
A 1000Base connection might require five to ten seconds to
establish a link.