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::RouteServerAssociation

Specifies the association between a route server and a VPC.
A route server association is the connection established between a route server and a VPC.
## Syntax

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

```
{
 "Type" : "AWS::EC2::RouteServerAssociation",
 "Properties" : {
 "[RouteServerId](#cfn-ec2-routeserverassociation-routeserverid)" : {{String}},
 "[VpcId](#cfn-ec2-routeserverassociation-vpcid)" : {{String}}
 }
}
```
### YAML

```
Type: AWS::EC2::RouteServerAssociation
Properties:
 [RouteServerId](#cfn-ec2-routeserverassociation-routeserverid): {{String}}
 [VpcId](#cfn-ec2-routeserverassociation-vpcid): {{String}}
```
## Properties

`RouteServerId` 
The ID of the associated route server. 
*Required*: Yes 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`VpcId` 
The ID of the associated VPC. 
*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 route server ID and VPC ID separated by the pipe symbol (\&#124;).</div><div class="naked_ctrl">
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