To add an additional network interface to an instance or to remove an interface from your instance perform the steps described below.

Please note: The steps below only provide a basic overview. The exact tasks required will vary depending on your network design. Please refer to the AWS documentation for details.

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When an instance is created, a default Ethernet interface is attached to the system. This is the primary network interface. You can create additional network interfaces and attach them to an instance. 

Please note: If an instance has only one Ethernet interface, a public IP address can be assigned to the interface automatically. However, this automatically assigned address will be removed by AWS if a second interface is added to the instance and the instance is stopped and restarted. Be careful not to lose connectivity to your instance when changing the network configuration. Refer to the section about Elastic IP Addresses for additional information.

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Creating a New Network Interface

The following steps are required to create a new network interface that can later be added to an instance:

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Attaching the Interface to your Instance

After creating a network interface, you have to assign it to the instance where it will be used.

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Assigning a Public IP Address to the Network Interface

Please note:

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The table below describes the steps required to add an Elastic IP address to a network interface.

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Detaching a Network Interface from an Instance

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Address Assignment Information

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