I’m doing the labs again and so many things are not working out of the box. Today I configured three routers in an NSSA area and one of them insisted on being the translator. The problem was that it wasn’t an ABR. It thought mistakenly that it was connected to the backbone but show ip ospf topology showed status of its backbone area as INACTIVE.
The solution (as always) is to delete the route config and type it in again.
I wonder if the lab images are just as buggy during the exam.