Slave-Master OpenLdap

- Replication ( Structure & Config  )
http://www.openldap.org/doc/admin24/replication.html#syncrepl%20replication

- Replication & Referral  ( information about configuring LDAP systems for Replication and Referral. )

http://www.zytrax.com/books/ldap/ch7/

6 April 2012  : )