I solve the problem, just replace Routerboard 751U (RB751G-2HnD ) with 750 GL and problem is gone.
Оbviously there is a problem with RB751G-2HnD, one more topic http://forum.mikrotik.com/t/rb751u-2hnd-crashing-when-using-skype/53367/1
I solve the problem, just replace Routerboard 751U (RB751G-2HnD ) with 750 GL and problem is gone.
Оbviously there is a problem with RB751G-2HnD, one more topic http://forum.mikrotik.com/t/rb751u-2hnd-crashing-when-using-skype/53367/1