The following are some restrictions associated with the LDAP Naming Service.
There is no support for pre-Solaris 8 clients
An LDAP server cannot be its own client
Setting up and managing an LDAP naming service is more complex and requires careful planning
A directory server (an LDAP server) cannot be its own client. In other words, you cannot configure the machine that is running the directory server software to become an LDAP naming service client.