I am trying to replace the functionality (from sites/enabled/default) of,

             ldap_server_1 {
                      notfound = return
             }

with a redundant set of servers.  I cannot have

        redundant-load-balance {
                ldap_server_1 {
                      notfound = return
             }
                ldap_server_2{
                      notfound = return
             }
        }

Does anyone know any way to (functionally) do this?