AWS SDK Version 3 for .NET
API Reference

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Associates Elastic IP addresses (EIPs) and private IPv4 addresses with a public NAT gateway. For more information, see Work with NAT gateways in the Amazon VPC User Guide.

By default, you can associate up to 2 Elastic IP addresses per public NAT gateway. You can increase the limit by requesting a quota adjustment. For more information, see Elastic IP address quotas in the Amazon VPC User Guide.

When you associate an EIP or secondary EIPs with a public NAT gateway, the network border group of the EIPs must match the network border group of the Availability Zone (AZ) that the public NAT gateway is in. If it's not the same, the EIP will fail to associate. You can see the network border group for the subnet's AZ by viewing the details of the subnet. Similarly, you can view the network border group of an EIP by viewing the details of the EIP address. For more information about network border groups and EIPs, see Allocate an Elastic IP address in the Amazon VPC User Guide.


This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginAssociateNatGatewayAddress and EndAssociateNatGatewayAddress.

Namespace: Amazon.EC2
Assembly: AWSSDK.EC2.dll
Version: 3.x.y.z


public virtual Task<AssociateNatGatewayAddressResponse> AssociateNatGatewayAddressAsync(
         AssociateNatGatewayAddressRequest request,
         CancellationToken cancellationToken


Type: Amazon.EC2.Model.AssociateNatGatewayAddressRequest

Container for the necessary parameters to execute the AssociateNatGatewayAddress service method.

Type: System.Threading.CancellationToken

A cancellation token that can be used by other objects or threads to receive notice of cancellation.

Return Value

The response from the AssociateNatGatewayAddress service method, as returned by EC2.

Version Information

Supported in: 8.0 and newer, Core 3.1

.NET Standard:
Supported in: 2.0

.NET Framework:
Supported in: 4.5 and newer

See Also