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Chapter 11: Troubleshooting
Fiber Optic or Twisted Pair Transceivers
228
This section applies to Ethernet line cards and expansion modules with
transceiver slots.
The L/A LEDs for transceiver slots should be solid or flashing green when
transceiver ports have links to end nodes. If a transceiver is cabled to an
end node but the L/A LED is off, try the following:
If all the L/A LEDs on the line cards in the chassis are off, try
pressing the eco-friendly button on the active master controller
card to turn on the LEDs.
Check that the transceiver is firmly inserted into the slot on the line
or controller card.
Check that both ends of the cable are securely connected to the
ports on the transceiver and end node.
Verify that the end node is powered on and operating properly.
Verify that the switch supports the transceiver. A list of supported
transceivers can be found in the SwitchBlade x8112 data sheet on
the Allied Telesis web site. You should also check the error log for
the following message:
port
n
.
n
.
n
doesn't support this module type.
The message indicates that the switch does not support the
designated transceiver.
Note
The AT-SBx81XLEM/Q2 Module supports revision B of the AT-
QSFPSR4 transceiver. It does not support revision A. The revision
level of the transceiver is printed on the transceiver label, after the
serial number. You can also display it with the SHOW SYSTEM
PLUGGABLE DETAIL command in the AlliedWare Plus operating
system.
Try replacing the cable.
Review the operating specifications of the transceiver and end
node to verify that the devices have the same speed and duplex
mode.
Check that the operating specifications, including wavelength and
maximum operating distance, of the transceiver are compatible
with the fiber optic port on the end node.
Make sure that you are using the appropriate type of fiber optic
cable and that the cable length does not exceed the allowed
maximum distance. The cable specifications for the transceivers
are provided in the installation instructions that ship with the
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