Weblogic Cluster without Apache

Hi All,

for one HA-environment, we need to define "cluster"-URL without Apache, Webtier and/or Hardware Loadbalancer. e.g.

There are N managed servers that they have to a common URL in Weblogic Server. It is clear that we can define Cluster Address: as followed --> host:port,host:port,...

How can I define a common URL für Cluster:Port, that all Managed servers could be for user reachable.

Regards,

Moh