Automatic conversion Slave/Master

[Joao Pereira <joaopedro17@netvisao.pt>]

Hello,
At the moment i'm developing a system with 2 ldap servers, one is the 
Master and the Other the Slave.
My problem is if Master is shuted down, i want the system to keep 
working, i need stuff to continue to be writen to the database of the 
slave, is it possible??? and when the Master comes online again the 
Slave update Masters DB and become Slave again. Or they can start 
working in the reverse order, the one that was a Master becomes Slave, 
and the Slave becomes the Master
Can LDAP do this alone??? or i need to develop code to do this????
Thanx for your help
Joao Pereira