AWS::EC2::TransitGatewayAttachment

Attaches a VPC to a transit gateway.

If you attach a VPC with a CIDR range that overlaps the CIDR range of a VPC that is already attached, the new VPC CIDR range is not propagated to the default propagation route table.

To send VPC traffic to an attached transit gateway, add a route to the VPC route table using AWS::EC2::Route.

To update tags for a VPC attachment after creation without replacing the attachment, use AWS::EC2::TransitGatewayVpcAttachment instead.

Syntax

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

{
  "Type" : "AWS::EC2::TransitGatewayAttachment",
  "Properties" : {
      "Options" : Options,
      "SubnetIds" : [ String, ... ],
      "Tags" : [ Tag, ... ],
      "TransitGatewayId" : String,
      "VpcId" : String
    }
}

Type: AWS::EC2::TransitGatewayAttachment
Properties:
  Options: 
    Options
  SubnetIds: 
    - String
  Tags: 
    - Tag
  TransitGatewayId: String
  VpcId: String

Properties

Return values

Ref

When you pass the logical ID of this resource to the intrinsic Ref function, Ref returns the ID of the attachment.

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

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 Fn::GetAtt.

See also