samba - Sep 2012 - add samba 4 pdc to a domain in another subnet

Hi,

I have a SAMBA 4 PDC in L1 (10.20.30.0/24) and need another DC in L2 (
192.168.100.0/24) which uses the same account, group and gpo information
but seperate servers for the storage of the roaming profiles.  What's the
easiest and best way to realize this with SAMBA 4? The speed between both
locations is about 32Mbit/s in both directions!

Greets

Florian Scholz