AWS::EC2::TransitGatewayRouteTableAssociation - AWS CloudFormation


Associates the specified attachment with the specified transit gateway route table. You can associate one route table with an attachment.

Before you can update the route table associated with an attachment, you must disassociate the transit gateway route table that is currently associated with the attachment. First update the stack to remove the associated transit gateway route table, and then update the stack with the ID of the new transit gateway route table to associate.


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


{ "Type" : "AWS::EC2::TransitGatewayRouteTableAssociation", "Properties" : { "TransitGatewayAttachmentId" : String, "TransitGatewayRouteTableId" : String } }


Type: AWS::EC2::TransitGatewayRouteTableAssociation Properties: TransitGatewayAttachmentId: String TransitGatewayRouteTableId: String



The ID of the attachment.

Required: Yes

Type: String

Update requires: Replacement


The ID of the route table for the transit gateway.

Required: Yes

Type: String

Update requires: Replacement

Return values


When you pass the logical ID of this resource to the intrinsic Ref function, Ref returns the ID of the transit gateway route table association.

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

See also