One day ,local engineer in a country report that there is some subracks out of management .Based on his description ,there are 2 cabinets and 8 subracks .Master-slave mode is used here and the slave subracks in another cabinet lsot management .
subrack 0,1,2,3 belong to cabinet 1
subrack 4,5,6,7 belong to cabinet 2
After reset and replace the AUX board ,problem is still there .
Port connection is right .
Change the cable between subrack 3 and 4 ,problem solved
1.AUX board get fault
2.Connection of ethernet port is not right
3.Cable have problem
It is recommended to use the cable which is accessories of equipment because 8-core straight cable should be used here .