Ensure that the Managed Server is not running.
Install the WebLogic Server/Portal 10 agent as you would in a stand-alone environment, with these exceptions:
When you are prompted to enter the startup script location, specify the same path that you provided when you installed the agent on the Administration Server.
When you are prompted to enter the WebLogic Server instance name, specify the Managed Server instance name. For example: server1
Start the Managed Server using the appropriate startup script:
Solaris and Linux systems: domain-name/bin/startManagedWeblogic.sh
Windows systems: domain-name\bin\startManagedWeblogic.cmd
where domain-name is where you located the domain.
For example, on a Solaris system:
cd /opt/bea/user_projects/domains/domain1/bin ./startManagedWeblogic.sh server1 http://adminhost.example.com:7001
Alternatively, you can start a Managed Server instance using Node Manager. See Configuring Node Manager for the WebLogic Server/Portal 10 Agent in a Cluster.