Brocade SFP reports Laser_Flt error due to faulty switch end sfp

Applies to

• Brocade Fabric OS (FOS)
• Brocade Fibre Channel (FC) switch

Issue

• In switchshow port status is Laser_Flt

Index Slot Port Address Media  Speed        State    Proto
============================================================
--Truncated-- 
20    1   20   701400   id    N16       Laser_Flt   FC

• sfpshow output shows Tx as -inf and Rx in optimal range

Port 41:
=============
Identifier:  3    SFP
Connector:   7    LC
Transceiver: 6801001200000000 8,16,32_Gbps SM lw Long_dist
[...]
Vendor Name: BROCADE         
Vendor OUI:  00:05:1e
Vendor PN:   57-1000486-01   
Vendor Rev:  B   
[...]
Temperature: 31      Centigrade 
Current:     0.000   mAmps 
Voltage:     3333.7  mVolts 
RX Power:    -0.7    dBm (843.9uW) 
TX Power:    -inf    dBm (0.0   uW) 

• portshow output shows the following-

portshow 1 
portDisableReason: None 
portCFlags: 0x1 
portFlags: 0x4441 
PRESENT U_PORT LED FAULT 
LocalSwcFlags: 0x0 
portType: 27.0 
POD Port: Port is licensed 
portState: 2 Offline 
Protocol: FC 
portPhys: 3 Laser_Flt 
portScn: 2 Offline 
port generation number: 76 
state transition count: 18 

• “Laser_Flt” state with Tx showing as -inf indicate that switch SFP is faulty
• In order to further isolate this issue, try to reseat the sfp and check the status.
• In case the port encounters same error again, proceed with the solution.