# Service Node

## Add Service Nodes

After creating a listener, you can enable/disable, add, modify or delete the service nodes of the listener according to business needs at any time.

1. Log in to the NLB console.
2. In the top navigation bar, select the region where the NLB instance belongs.
3. On the NLB **Instance** page, find the target NLB instance, and click Instance ID.
4. Click the **Listener Management** tab, select the target listener, and enter the listener details page.
5. Select the listener where you need to add nodes, and click **Add Node** in the service node module.
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6. Configure the following information in Add Node.

| Configuration Item   | Description                                                         |
| :----------------- | :--------------------------------------------------------------- |
| Resource Type      | Select the resource type of backend nodes, supporting selection of cloud servers, physical cloud servers, virtual network cards, and private IPs |
| Associated Region | When the chosen resource type is internal IP, you can choose different regions                |
| Associated VPC | The VPC where the backend node is located                                      |
| Associated Subnet | The subnet where the backend node is located                           |
| Listening Port | The port to forward to                                              |
| Optional Resources | Select the resources that can be added. If you choose an Intranet IP, you need to input the intranet IP of the mount node |

## Manage Service Nodes

After creating a listener, you can enable/disable, add, modify or delete the service nodes of the listener according to business needs at any time.

1. Log in to the NLB console.
2. In the top navigation bar, select the region to which the NLB instance belongs.
3. On the NLB **Instance** page, find the target NLB instance, and click instance ID.
4. Click the **Listener Management** tab, select the target listener, and enter the listener details page.
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5. Click the Service Node tab.
   1. Enable a Node：
      1. Check and select the nodes that need to be enabled, and click Enable in the top left corner of the list.
      2. Find the service node that needs to be enabled, click **Start** in the **Operation** column, and then click **OK** in the pop-up window.
   2. Disable a Node
      1. Check and select the nodes that need to be disabled, and click Disable in the top left corner of the list.
      2. Find the service node that needs to be disabled, click **Disable** in the **Operation** column, and then click **OK** in the pop-up window.
   3. Delete a Node
      1. Check and select the nodes that need to be deleted, and click Delete in the top left corner of the list.
      2. Find the service node that needs to be deleted, click **Delete** in the **Operation** column, and then click **OK** in the pop-up window.