AWS CloudFormation
User Guide (API Version 2010-05-15)


The AWS::EC2::EIP resource allocates an Elastic IP (EIP) address and can, optionally, associate it with an Amazon EC2 instance.


   "Type" : "AWS::EC2::EIP",
   "Properties" : {
      "InstanceId" : String,
      "Domain" : String



The Instance ID of the Amazon EC2 instance that you want to associate with this Elastic IP address.

Required: No

Type: String

Update requires: No interruption


Set to vpc to allocate the address to your Virtual Private Cloud (VPC). No other values are supported.


If you define an Elastic IP address and associate it with a VPC that is defined in the same template, you must declare a dependency on the VPC-gateway attachment by using the DependsOn attribute on this resource. For more information, see DependsOn Attribute.

For more information, see AllocateAddress in the Amazon EC2 API Reference. For more information about Elastic IP Addresses in VPC, go to IP Addressing in Your VPC in the Amazon VPC User Guide.

Required: Conditional. Required when allocating an address to a VPC

Type: String

Update requires: Replacement

Return Values


When you specify the logical ID of an AWS::EC2::EIP object as an argument to the Ref function, AWS CloudFormation returns the value of the instance's PublicIp.

For more information about using the Ref function, see Ref.


Fn::GetAtt returns a value for a specified attribute of this type. This section lists the available attributes and corresponding return values.


The ID that AWS assigns to represent the allocation of the address for use with Amazon VPC. This is returned only for VPC elastic IP addresses. Example return value: eipalloc-5723d13e

For more information about using Fn:GetAtt, see Fn::GetAtt.


To view AWS::EC2::EIP snippets, see Assigning an Amazon EC2 Elastic IP Using AWS::EC2::EIP Snippet.