We have 2 domain controllers in our office one acting as primary and the other additional domain controller we installed for redundancy. Yesterday our primary domain controller wont boot up due to memory issue and thats when we realized that the additional domain controller isnt serving logon request thereby destroying the whole purpose of redundant design.
We discovered that he additional AD server was not GC enabled and hence was unable to serve logon request.
I need some advice on whether its recommended to enable Global Catalogue on the additional AD server as well. I was told that enabling GC on both the domain controllers will have some performance issues on the server.
Is there any other way to accomplish redundancy apart from enabling GC and Universal caching?