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::ClientVpnTargetNetworkAssociation

Specifies a target network to associate with a Client VPN endpoint. A target network is a subnet in a VPC. You can associate multiple subnets from the same VPC with a Client VPN endpoint. You can associate only one subnet in each Availability Zone. We recommend that you associate at least two subnets to provide Availability Zone redundancy.
## Syntax

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

```
{
 "Type" : "AWS::EC2::ClientVpnTargetNetworkAssociation",
 "Properties" : {
 "[AvailabilityZone](#cfn-ec2-clientvpntargetnetworkassociation-availabilityzone)" : {{String}},
 "[AvailabilityZoneId](#cfn-ec2-clientvpntargetnetworkassociation-availabilityzoneid)" : {{String}},
 "[ClientVpnEndpointId](#cfn-ec2-clientvpntargetnetworkassociation-clientvpnendpointid)" : {{String}},
 "[SubnetId](#cfn-ec2-clientvpntargetnetworkassociation-subnetid)" : {{String}}
 }
}
```
### YAML

```
Type: AWS::EC2::ClientVpnTargetNetworkAssociation
Properties:
 [AvailabilityZone](#cfn-ec2-clientvpntargetnetworkassociation-availabilityzone): {{String}}
 [AvailabilityZoneId](#cfn-ec2-clientvpntargetnetworkassociation-availabilityzoneid): {{String}}
 [ClientVpnEndpointId](#cfn-ec2-clientvpntargetnetworkassociation-clientvpnendpointid): {{String}}
 [SubnetId](#cfn-ec2-clientvpntargetnetworkassociation-subnetid): {{String}}
```
## Properties

`AvailabilityZone` 
Describes Availability Zones, Local Zones, and Wavelength Zones. 
*Required*: No 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`AvailabilityZoneId` 
Property description not available. 
*Required*: No 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`ClientVpnEndpointId` 
The ID of the Client VPN endpoint. 
*Required*: Yes 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`SubnetId` 
The ID of the subnet to associate with the Client VPN endpoint. Required for VPC-based endpoints. For Transit Gateway-based endpoints, use `AvailabilityZone` or `AvailabilityZoneId` instead. 
*Required*: No 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
## Return values

### Ref

When you pass the logical ID of this resource to the intrinsic `Ref` function, `Ref` returns the association ID. For example: `cvpn-assoc-1234567890abcdef0`.
For more information about using the `Ref` function, see [https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html).
## Examples

### Associate a target subnet with a client VPN endpoint

The following example associates a target network with a client VPN endpoint.
#### YAML

```
myNetworkAssociation:
 Type: "AWS::EC2::ClientVpnTargetNetworkAssociation"
 Properties:
 ClientVpnEndpointId: 
 Ref: myClientVpnEndpoint
 SubnetId: 
 Ref: mySubnet
```
#### JSON

```
"myNetworkAssociation": {
 "Type": "AWS::EC2::ClientVpnTargetNetworkAssociation",
 "Properties": {
 "ClientVpnEndpointId": {
 "Ref": "myClientVpnEndpoint"
 },
 "SubnetId": {
 "Ref": "mySubnet"
 }
 }
}
```
## See also

+ [ Getting Started with Client VPN](https://docs.aws.amazon.com/vpn/latest/clientvpn-admin/cvpn-getting-started.html) in the *AWS Client VPN Administrator Guide*
+ [Target Networks](https://docs.aws.amazon.com/vpn/latest/clientvpn-admin/cvpn-working-target.html) in the *AWS Client VPN Administrator Guide*
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