Start link problem determination
During fiber optic channel link problem determination, the devices at each end of the link are identified as device 1 and device 2. Always refer to the device where you start these procedures as device 1.
Problem determination consists of measuring the link at specific points. These measured values
are then compared to acceptable or maximum values to determine if the link loss is within
specifications. Table 1 and Table 2 contain these values for the MAP
procedures; Table 1 contains the
fast-path values. If it is determined that a device transmitter or receiver is not within
specifications and the device is maintained by IBM®, replace the transceiver card according to the device
maintenance procedure and verify correct link operation. If the device is not maintained by IBM, inform the
customer that the transceiver is out of specification and that this is the probable source of the
error, then return to the IBM device that generated the call and follow its maintenance procedures for end
of call. If the problem still exists after replacing the transceiver card, go to 0300: Start to perform link problem determination or
verification.
Go to 0300: Start to perform link problem determination or verification.