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::TransitGatewayConnect

Creates a Connect attachment from a specified transit gateway attachment. A Connect attachment is a GRE-based tunnel attachment that you can use to establish a connection between a transit gateway and an appliance.
A Connect attachment uses an existing VPC or AWS Direct Connect attachment as the underlying transport mechanism.
## Syntax

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

```
{
 "Type" : "AWS::EC2::TransitGatewayConnect",
 "Properties" : {
 "[Options](#cfn-ec2-transitgatewayconnect-options)" : {{TransitGatewayConnectOptions}},
 "[Tags](#cfn-ec2-transitgatewayconnect-tags)" : {{[ Tag, ... ]}},
 "[TransportTransitGatewayAttachmentId](#cfn-ec2-transitgatewayconnect-transporttransitgatewayattachmentid)" : {{String}}
 }
}
```
### YAML

```
Type: AWS::EC2::TransitGatewayConnect
Properties:
 [Options](#cfn-ec2-transitgatewayconnect-options): {{
 TransitGatewayConnectOptions}}
 [Tags](#cfn-ec2-transitgatewayconnect-tags): {{
 - Tag}}
 [TransportTransitGatewayAttachmentId](#cfn-ec2-transitgatewayconnect-transporttransitgatewayattachmentid): {{String}}
```
## Properties

`Options` 
The Connect attachment options. 
+ protocol (gre)
*Required*: Yes 
*Type*: [TransitGatewayConnectOptions](aws-properties-ec2-transitgatewayconnect-transitgatewayconnectoptions.md) 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`Tags` 
The tags for the attachment. 
*Required*: No 
*Type*: Array of [Tag](aws-properties-ec2-transitgatewayconnect-tag.md) 
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)
`TransportTransitGatewayAttachmentId` 
The ID of the attachment from which the Connect attachment was created. 
*Required*: Yes 
*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 transit gateway attachment. 
### Fn::GetAtt

The `Fn::GetAtt` intrinsic function returns a value for a specified attribute of this type. The following are the available attributes and sample return values.
For more information about using the `Fn::GetAtt` intrinsic function, see [https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html).
#### 

`CreationTime` 
The creation time.
`State` 
The state of the attachment.
`TransitGatewayAttachmentId` 
The ID of the transit gateway attachment.
`TransitGatewayId` 
The ID of the transit gateway.</div><div class="naked_ctrl">
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