Quoting Francesco Malvezzi francesco.malvezzi@unimore.it:
I was looking for a way to replicate (master -> slave) a sub-portion of the cn=config, namely the cn=schema,cn=config.
OK, so then it looks like this is what you're after:
http://documentation.fusiondirectory.org/en/documentation/replication_syncre...
NOTE: I didn't write that document
-mike