I have  an architecture with 2 openldap masters in mirormode ( refreshAndPersist ).

and few consumers ( refreshAndPersist )

The provisionning api and consumer request masters via vip ( sorry server configuration ), 

It's complex for me to upgrade all the openldap in the same operation. 

Can i upgrade only the 2 masters in 2.5, and the consumers in a second time ?

The replication between master in 2.5 and consumers in 2.4 work's fine ?

Thank's in advance for your replies.

Regards

Olivier