Brocade switch port offline and in “No light” state with Rx power showing as -inf

• Switch port state shows as No_Light under switchshow output:

Index Port Address Media Speed      State   Proto
==================================================
   1  1   XXXXX      id   N4    No_Light    FC

• portshow of the affected port reports Offline status:

portshow 1
portDisableReason: None
portCFlags: XXXX
portFlags: XXXX PRESENT LED
LocalSwcFlags: 0x0
portType:  18.0
POD Port: Port is licensed
portState: 2 Offline
Protocol: FC
portPhys:  4 No_Light  portScn:  2 Offline
port generation number:    XXXX
state transition count:    12

• sfpshow reports Rx state as  -inf:

RX Power:    -inf    dBm (0.0 uW)   1.0    uW 6550.0 uW  49.0   uW  1100.0 uW
TX Power:    -6.2    dBm (239.7 uW)  50.0  uW  700.0  uW 100.0  uW   600.0 uW

• fabriclog indicates that the port flapped and went Offline

Switch 0; Sun Oct 22 20:28:32 2023 GMT (GMT+0:00)
20:28:32.074305 SCN Port Offline;g=0xa8d2                   D2,P0  D2,P0 1     NA

• SFP and cable have been replaced on the switch side, but that did not help.