This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).
# AWS::EC2::NatGateway AvailabilityZoneAddress

For regional NAT gateways only: The configuration specifying which Elastic IP address (EIP) to use for handling outbound NAT traffic from a specific Availability Zone. 
A regional NAT gateway is a single NAT Gateway that works across multiple availability zones (AZs) in your VPC, providing redundancy, scalability and availability across all the AZs in a Region.
For more information, see [Regional NAT gateways for automatic multi-AZ expansion](https://docs.aws.amazon.com/vpc/latest/userguide/nat-gateways-regional.html) in the *Amazon VPC User Guide*.
## Syntax

To declare this entity in your CloudFormation template, use the following syntax:
### JSON

```
{
 "[AllocationIds](#cfn-ec2-natgateway-availabilityzoneaddress-allocationids)" : {{[ String, ... ]}},
 "[AvailabilityZone](#cfn-ec2-natgateway-availabilityzoneaddress-availabilityzone)" : {{String}},
 "[AvailabilityZoneId](#cfn-ec2-natgateway-availabilityzoneaddress-availabilityzoneid)" : {{String}}
}
```
### YAML

```
 [AllocationIds](#cfn-ec2-natgateway-availabilityzoneaddress-allocationids): {{
 - String}}
 [AvailabilityZone](#cfn-ec2-natgateway-availabilityzoneaddress-availabilityzone): {{String}}
 [AvailabilityZoneId](#cfn-ec2-natgateway-availabilityzoneaddress-availabilityzoneid): {{String}}
```
## Properties

`AllocationIds` 
The allocation IDs of the Elastic IP addresses (EIPs) to be used for handling outbound NAT traffic in this specific Availability Zone. 
*Required*: Yes 
*Type*: Array of String 
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)
`AvailabilityZone` 
For regional NAT gateways only: The Availability Zone where this specific NAT gateway configuration will be active. Each AZ in a regional NAT gateway has its own configuration to handle outbound NAT traffic from that AZ. 
A regional NAT gateway is a single NAT Gateway that works across multiple availability zones (AZs) in your VPC, providing redundancy, scalability and availability across all the AZs in a Region. 
*Required*: No 
*Type*: String 
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)
`AvailabilityZoneId` 
For regional NAT gateways only: The ID of the Availability Zone where this specific NAT gateway configuration will be active. Each AZ in a regional NAT gateway has its own configuration to handle outbound NAT traffic from that AZ. Use this instead of AvailabilityZone for consistent identification of AZs across AWS Regions. 
A regional NAT gateway is a single NAT Gateway that works across multiple availability zones (AZs) in your VPC, providing redundancy, scalability and availability across all the AZs in a Region. 
*Required*: No 
*Type*: String 
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)</div><div class="naked_ctrl">
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