Create WLS Clustered Domain

Refer here:
http://www.oracle-base.com/articles/11g/weblogic-11g-clustered-domains.php

Create the Clustered Domain

Below is an example of a clustered domain:

Machines        : wls11g-1.localdomain,
                  wls11g-2.localdomain

Domain Name     : clusterDomain


Managed Servers : AdminServer     - Running on wls11g-1.localdomain
                  clusterServer_1 - Running on wls11g-1.localdomain
                  clusterServer_2 - Running on wls11g-2.localdomain

Cluster         : cluster_1