Saturday, March 2, 2013 8:27 AM
I was thinking that Windows client systems (XP, Vista, 7, 8) respects link costs. Let's use standard Microsoft diagram.
If PC within Site B with default settings lose connection to every site B Domain Controller, it will not contact DC within Site A, it will try to use as a logon server random DC from the domain. And it could be Site D for example. In the real world scenario PC from New York will use DC from Sydney instead of WashingtonJ.
To enable expected behavior we have to set followed policy:
Now our PC will use DC with the lowest link cost – Washington.