Another replication question

["Theodore Reph" <ted@reph.org>]

In the documentation http://www.openldap.org/doc/admin21/replication.html in
section 13.4.5, it states:

"Note that the DN given by the binddn= directive must exist in the slave
slapd's database (or be the rootdn specified in the slapd config file) in
order for the bind operation to succeed."

What does it mean that the binddn = directive must must exist in the slave
slapd's database?  How does one do that?

Theodore Reph
treph@att.net