There is no direct method to upgrade an existing server using the interfaces file to one that uses lightweight directory services. To upgrade a previous release of Adaptive Server to Adaptive Server version 15.0, see the Installation Guide.
Once you have upgraded the server, you can configure your server to use LDAP service.
Shut down the server. See Chapter 2, “Starting and Stopping Servers.”
Edit the $SYBASE/$SYBASE_OCS/config/libtcl.cfg or libtcl64.cfg file to add the directory service. See “Enabling LDAP directory services”.
Use dsedit and add the server entry to directory service. See “Adding a server to the directory services”.
Restart your server.
