Few questions about replica (mirror mode?)

I plan few OpenLDAP servers: N readonly secondaries and single writable main.

In my case OpenLDAP is critical as readonly database, and changes are allowed to fail. But I need all readonly replicas contain the same data same time, and I have possibilities to temporarily disconnect readonly secondaries from master.

Is there a some kind of operational\replication mode when: - Transactional changes over all servers: Writable main fails writing to database and propagating them to secondaries in case any of secondaries can not receive same changes - Secondary server may start "empty" and self-register as secondary server on writeable main, then get in sync. Until sync complete, secondary server will not satisfy any requests from clients.