Prefered DC

Hi I got two DC on segment 10.52.0.1
one Dc on segment 10.52.1.2 and all the clients machine are on the segments 10.52.1.xx

My two segment communique by a microwave

ok what I want too know is can I force the client too be authenticated by the Dc on the same segment 10.52.1.2 (prefered DC) if yes where and How.

second question what’s the command to see which Dc authenticated the client