[Samba] About BDC

[Loc Nguyen]

Hi list,

First let me give something about my network
structure

192.168.4.0-->192.168.4.3(BDC)
|
VPN GATEWAY
|
Internet
|
VPN
GATEWAY
|
192.168.5.0-->192.168.5.3 (PDC)

Right now I'm having
192.168.5.3(SAMBA+LDAP PDC) and WINS server, and I want to build a BDC
(192.168.4.3) on the other side of the VPN.

my questions are:
1. is it
possible?
2. is BDC needs to be setup as a WINS server as well?
3. when
one of the gateway down or internet connection going down, can each side
of the VPN talk to PDC or BDC?
4. if one of the Domain Controler is
down, can the whole network talk to the remainder?
5. What need to setup
on each side

It could be great if a communication flow diagram is given
in normal

Any experience in setting a BDC is appreciated.

Thanks!