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# Configure Node Manager

Before you begin

Ensure that you have created a machine and that you have installed and configured Node Manager on each physical machine that contains a WebLogic Server instance. For more information on creating a machine, see Create and configure machines. For information on installing and configuring Node Manager, see Using Node Manager to Control Servers.

Node Manager is program that is used to control WebLogic Server instances. A single Node Manager instance is used to control all of the server instances running on the same physical machine. These instances can reside in different clusters, domains, etc. You must configure each machine in your domain to communicate with Node Manager.

For general information on Node Manager, see Using Node Manager to Control Servers.

Perform the following procedures to configure your machine to communicate with Node Manager.

1. If you have not already done so, in the Change Center of the Administration Console, click Lock & Edit (see Use the Change Center).
2. In the Administration Console, expand Environment and select Machines.
3. Select the machine for which you want to configure Node Manager.
4. Select the Configuration tab, then select Node Manager.
5. Select the Node Manager type from the drop down box in the Type field.

   For more information on different Node Manager types, see "Using Node Manager to Control Servers".

   Note: The values you provide here must correspond to the values used when you configured the Node Manager instance.

6. Enter the DNS name or IP address upon which Node Manager listens in the Listen Address box.

   If you identify the Listen Address by IP address, you must disable Host Name Verification on Administration Servers that will access Node Manager. For more information and instructions, see "Using Hostname Verification" in Managing WebLogic Security.

7. Enter a value in the Listen Port field. This is the port where Node Manager listens for incoming requests.
8. If you have set the Type field to SSH or RSH, you should specify values in the Node Manager Home and Shell Command fields.

   For more information on configuring Node Manager using SSH or RSH, see Configuring Script-based Node Manager.

9. Click Save.
10. To activate these changes, in the Change Center of the Administration Console, click Activate Changes.
    Not all changes take effect immediately—some require a restart (see Use the Change Center).