Configure required client parameters needed for external naming methods, including Network Information Service (NIS) and Cell Directory Service (CDS) in the profile.
To configure external naming method parameters:
In the navigator pane, expand Oracle Net Configuration > Local > Profile.
From the list in the right pane, select Naming.
Select the External tab.
Enter a value in the appropriate field for the external naming method that you are using.
Choose File > Save Network Configuration.