The LDAP directory services means that it is no longer necessary to use an interfaces file in both the client and the server. Version 12.5 supports LDAP services for obtaining server information, and so does Component Integration Services. When a connection to a remote server is attempted, CIS instructs Open Client software to reference either the interfaces file or an LDAP server.
CIS uses LDAP services only when the configuration file (libtcl.cfg) specifies it. libtcl.cfg can be found at $SYBASE/$SYBASE_OCS/config/libtcl.cfg.
Note: When an LDAP Server is specified in libtcl.cfg then server information becomes accessible from the LDAP Server only and ASE/CIS ignores any (traditional) interfaces file.