HP-UX Directory Server Administrator Guide HP-UX Directory Server Version 8.1 (5900-3098, May 2013)

5. In the Enter a new Smart Referral field, enter a referral in the LDAP URL format, then click Add.
The LDAP URL must be in the following format:
ldap://hostname:portnumber/[optional_dn]
optional_dn is the explicit DN for the server to return to the requesting client application.
90 Configuring Directory Databases