Problems with configuring LDAP in Vplex

Hi ,

Can anyone explain me the about how to configure LDAP in vplex.
I have the commands but I have no knowledge about distinguished names , mapped principal and how to find that out.

command used - authentication directory-service configure

error - It asks for a password ( but i have no idea whose password it is asking and which server it s trying to authenticate)

authentication directory-service  Evaluation of < > failed.

Any help will be appreciated !