normally, kun naa ka Windows domain controller sa imo network setup, mao sad na imo configure as local DNS/DHCP server. As for subnetting your network, depende on what kind of network devices you have now or are you willing to invest a bit on your core switch. All you need is a cheap layer 3 switch to serve as your core switch where you configure your subnets (kun wala ka L3 switch pwede sad router nalang gyud

) Then create ka 3 subnets, 2 for the clients and 1 for your main infrastructure servers. Dali ra na implement kun naa ka router or L3 switch. Just enable the IP Helper sa imo core switch or router ayos na.