[Samba] Samba PDC with Slave LDAP server

[ashok cvs]

Hi all

I have a samba PDC with LDAP with samba version 3.0.21,(domain=mydomain.com
).
 the samba and openldap are configured on a single system.
 i would like to setup samba BDC with slave LDAP server for domain
mydomain.com
and samba BDC is also having DNS server for domain .

my query is, the nsswitch.conf and ldap.con of BDC should point to it's own
LDAP server
or Master LDAPserver

and in smb.conf file of BDC, the passdb backed should point to master or
slave.

and smbpasswd -w <password>, (which password should i enter , the master
LDAP server rootdn password or slave LDAP server rootdn passowrd)

please guide me

Regards
ashok