A cascading OpenLDAP syncrepl setup

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http://serverfault.com – We are planning to have a 3-tier setup with LDAP servers. For simplicity, I shall refer to the tiers as T1, T2, and T3, respectively. The plan is to have changes made on the T1 backend be replicated to T2, and then T2 replicates these to T3. The reverse should also be enabled. Is this possible? How can this be done? I've been trying to set this up but I am stuck with the replication from T2 to T3. According to the logs, syncing to T3 stops at do_syncrep2: rid=003 LDAP_RES_INTERMEDIATE - REFRESH_DELETE and nothing else follows. Meanwhile, at T3's side, the last logged messages are: Feb 1 (HowTos)