This is getting weirder and weirder. I have verified that LDAP is reachable on the LDAP host by telnetting to it from the mailbox host:
And I have further verified the fact that ldap is running on the ldap host with with command.
root@cloud4:~# telnet cloud3.example.com 389
Connected to cloud3.example.com.
Escape character is '^]'.
Yet this condition persists and it's driving me nuts!!!
zimbra@cloud3:~$ ps -ef | grep zimbra | grep slapd
zimbra 2973 1 0 May20 ? 00:00:11 /opt/zimbra/openldap/sbin/slapd -l LOCAL0 -4 -u zimbra -h ldap://cloud3.example.com:389 ldapi:/// -F /opt/zimbra/data/ldap/config
zimbra 27784 12789 0 07:40 pts/0 00:00:00 grep slapd
1) Common Configuration:
+Ldap master host: cloud3.example.com
+Ldap port: 389
******* +Ldap Admin password: Not Verified
+LDAP Base DN: cn=zimbra
+Secure interprocess communications: yes