I could use some advice with regards to Windows 2016 active directory scenario.
I have 3 domain controllers, each holding a copy of the global catalogue.
The domain controllers are spread out globally in 3 locations:
North America, Asia, and Europe. The all are inter-connected via VPN tunnels, and have no problem replicating / communicating with each other.
North america was the first DC built.
I am trying to account for different scenarios and I am currently trying to test what happens in the event of a failure.
What happens if say Europe VPN tunnels go done and it loses communication to the other 2 DC's? How is it handled if the VPN tunnels are down (DC is still working in Europe) for anywhere from a few minutes to say 24-48 hours? Would there be a serious problem when the VPN tunnels come back up and Europe can communicate with the other 2 servers again?
I need to understand better and hopefully someone can explain what happens and how tombstoning plays a part in this.
Thanks in advance,