We have one Controller PM866 with modules s800 using TB840 and TK811 fiber, the S800 modules fails ramdomly each 2 minutes aprox, the module appears as module missing for 2 or 3 seconds, the indication in hardware appear in red like module is not well plugged . we have 3 racks of modules 36 modules in total and 3 Tb840 and the fails are presented ramdomly in any module of 3 racks.
we change tb840, fiber and CPU, but the problem persist,
Someone have a possible test to do? or someone have a similar experience and have any solution.
1. Check if the optical connectors are plugged in with correct orientation, we had a customer who plugged them in with the locking clips on the wrong side. 2. Read product bulletin 3BSE084764 about a problem with failing cluster modems and check if your components are in the range of effected serial numbers.