Assigning Servers to Clusters

To assign servers to clusters in WebLogic:

Log in to the WebLogic Administration Console with the following URL:
http://<host_name>:<port>/console
In the Change Center pane, click Lock & Edit.
In the Domain Structure Pane, click Environment, then click Clusters.
Click the name of the cluster you want to which you want to assign servers.
On the Settings for <Cluster_Name> page, click the Servers tab.
On the Servers tab, in the Servers table, click Add.
Select Select an existing server, and add it as a member of this cluster, to add a preexisting server to the cluster.
Select a server in the Select a server list.
Click Next.
Click Activate Changes.