To start a node that is running the middleware agent, you must supply a user name and password for the node.
To access this administrative console page, click System administration > Middleware nodes. Select a node, and select the Start agent operational action. Click Perform.
To have the user name and password saved, you can enter them in the installation targets administrative console panel. Click Centralized Installation Manager > Installation targets. Add the node as an installation target, including your user name and password.