[UMG8900] Troubleshooting Experience: Communication failure of the slave FE plan

Problem: Communication failure of the slave FE plane alarm comes in MGWxx

Alarm Log from MGWxx::::::::

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ALARM  116582         Fault         Major     UMG8900     52            Hardware
     Sync serial No.  =  220768
          Alarm name  =  Communication failure of the slave FE plane
   Alarm raised time  = XXXXXXXXXXXXX
       Location info  =  Destination frame No.=1, Destination slot No.=8, Board Position=front, Destination board type=OMU, Destination board No.=0, Source frame No.=3, Source slot No.=7, Board Position=front, Source board type=MPU, Source board No.=3, Fault channel slot=24
          Auto Clear  =  Yes
          Module No.  =  26

ALARM  116637         Fault         Major     UMG8900     52            Hardware
     Sync serial No.  =  220878
          Alarm name  =  Communication failure of the slave FE plane
   Alarm raised time  =  XXXXXXXXXXXXXXXXXXXX
       Location info  =  Destination frame No.=3, Destination slot No.=7, Board Position=front, Destination board type=MPU, Destination board No.=3, Source frame No.=1, Source slot No.=8, Board Position=front, Source board type=OMU, Source board No.=0, Fault channel slot=8
          Auto Clear  =  Yes
          Module No.  =  26

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After analysis,there are two fault point（BLU in Frame0 Slot3 and NET in Frame3 Slot8)  is found in this problem 

Please perform the following steps to solve it（the steps should be perform in the night when the service is not busy）：

 1.Run command to reset FE Lanswitch as following

     DBG CMD:FN=0,SN=3,BP=BACK,CM="bsp 5338 rst";
     DBG CMD:FN=0,SN=3,BP=BACK,CM="bsp 5338 init";
     DBG CMD:FN=0,SN=3,BP=BACK,CM="do funccall byname FamNETBLUSet5338Switch";
     DBG CMD:FN=3,SN=8,BP=BACK,CM="bsp 5338 rst";
     DBG CMD:FN=3,SN=8,BP=BACK,CM="bsp 5338 init";
     DBG CMD:FN=3,SN=8,BP=BACK,CM="do funccall byname FamNETBLUSet5338Switch";

  2.Check whether the alarm clear ot not.If the alarm not cleared then Please plug out the board and plug in again of BLU Board  in Frame0 Slot3 and NET Board in Frame3 Slot8

  3.If still the alarm persists then Please replace the two boards（BLU in Frame0 Slot3 and NET in Frame3 Slot8）