Trying to create master/slave solution with syncrepl

Hello,

I am trying to create an OpenLDAP master/slave solution with syncrepl, but I have not been successful so far.

I followed the suggestions of this site, with another sync password:

https://www.itzgeek.com/how-tos/linux/configure-openldap-master-slave-replic...

One thing I made different, on the master server, I created the replication user with a userPassword: in SSHA-Format instead of clear text. Additionally, I set, following the suggestion of another website:

olcDbIndex: entryUUID eq olcDbIndex: entryCSN eq

Now, I can see with tcpdump that the slave server contacts the master server and that the master server send replies, but no LDAP users are synchronized to the slave. Unfortunately, nothing about replication is logged to syslog, though I started slapd on both master and slave with options "-s Sync -c rid=001".

Any idea what is wrong or how I can at least get some debgging output about what is happening on master and slave, related to replication?

Regards Christoph