When you deploy an EJB, you specify the servers and clusters to which the EJB deployment is targeted. After you have deployed an EJB, you can update the servers and clusters to which it is targeted.
To set target servers and clusters for a deployed EJB:
The right pane lists the EJBs and other modules that you have deployed, or tried to deploy.
By default, the Administration Console deploys an EJB to all server instances in the cluster (the "All servers in the cluster" option). To deploy the EJB to selected servers in a cluster, select "Part of the cluster", and then select the individual server instances to which you want to deploy the EJB.