Can anyone reply us please.
Have a look at these documents
Is It Possible To Use Ldap.Ora On The Client To Get Tnsname Entries From An Oid? (Doc ID 461151.1)
Using TNS_ADMIN with LDAP.ORA and Net Manager (Doc ID 189627.1)
What Is The Search Order For The LDAP.ORA File ? (Doc ID 363283.1)
We have to use tnsnames.ora file for connectivity.