This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::VpcLattice::ServiceNetwork
<a name="aws-resource-vpclattice-servicenetwork"></a>

Creates a service network. A service network is a logical boundary for a collection of services. You can associate services and VPCs with a service network.

For more information, see [Service networks](https://docs.amazonaws.cn/vpc-lattice/latest/ug/service-networks.html) in the *Amazon VPC Lattice User Guide*.

## Syntax
<a name="aws-resource-vpclattice-servicenetwork-syntax"></a>

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

### JSON
<a name="aws-resource-vpclattice-servicenetwork-syntax.json"></a>

```
{
  "Type" : "AWS::VpcLattice::ServiceNetwork",
  "Properties" : {
      "[AuthType](#cfn-vpclattice-servicenetwork-authtype)" : {{String}},
      "[Name](#cfn-vpclattice-servicenetwork-name)" : {{String}},
      "[SharingConfig](#cfn-vpclattice-servicenetwork-sharingconfig)" : {{SharingConfig}},
      "[Tags](#cfn-vpclattice-servicenetwork-tags)" : {{[ Tag, ... ]}}
    }
}
```

### YAML
<a name="aws-resource-vpclattice-servicenetwork-syntax.yaml"></a>

```
Type: AWS::VpcLattice::ServiceNetwork
Properties:
  [AuthType](#cfn-vpclattice-servicenetwork-authtype): {{String}}
  [Name](#cfn-vpclattice-servicenetwork-name): {{String}}
  [SharingConfig](#cfn-vpclattice-servicenetwork-sharingconfig): {{
    SharingConfig}}
  [Tags](#cfn-vpclattice-servicenetwork-tags): {{
    - Tag}}
```

## Properties
<a name="aws-resource-vpclattice-servicenetwork-properties"></a>

`AuthType`  <a name="cfn-vpclattice-servicenetwork-authtype"></a>
The type of IAM policy.  
+ `NONE`: The resource does not use an IAM policy. This is the default.
+ `AWS_IAM`: The resource uses an IAM policy. When this type is used, auth is enabled and an auth policy is required.
*Required*: No  
*Type*: String  
*Allowed values*: `NONE | AWS_IAM`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Name`  <a name="cfn-vpclattice-servicenetwork-name"></a>
The name of the service network. The name must be unique to the account. The valid characters are a-z, 0-9, and hyphens (-). You can't use a hyphen as the first or last character, or immediately after another hyphen.  
If you don't specify a name, CloudFormation generates one. However, if you specify a name, and later want to replace the resource, you must specify a new name.  
*Required*: No  
*Type*: String  
*Pattern*: `^(?!servicenetwork-)(?![-])(?!.*[-]$)(?!.*[-]{2})[a-z0-9-]+$`  
*Minimum*: `3`  
*Maximum*: `63`  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`SharingConfig`  <a name="cfn-vpclattice-servicenetwork-sharingconfig"></a>
Specify if the service network should be enabled for sharing.  
*Required*: No  
*Type*: [SharingConfig](aws-properties-vpclattice-servicenetwork-sharingconfig.md)  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Tags`  <a name="cfn-vpclattice-servicenetwork-tags"></a>
The tags for the service network.  
*Required*: No  
*Type*: Array of [Tag](aws-properties-vpclattice-servicenetwork-tag.md)  
*Minimum*: `0`  
*Maximum*: `50`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

## Return values
<a name="aws-resource-vpclattice-servicenetwork-return-values"></a>

### Ref
<a name="aws-resource-vpclattice-servicenetwork-return-values-ref"></a>

When you pass the logical ID of this resource to the intrinsic `Ref` function, `Ref` returns the Amazon Resource Name (ARN) of the service network.

For more information about using the `Ref` function, see [https://docs.amazonaws.cn/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html](https://docs.amazonaws.cn/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html).

### Fn::GetAtt
<a name="aws-resource-vpclattice-servicenetwork-return-values-fn--getatt"></a>

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.amazonaws.cn/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html](https://docs.amazonaws.cn/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html).

#### 
<a name="aws-resource-vpclattice-servicenetwork-return-values-fn--getatt-fn--getatt"></a>

`Arn`  <a name="Arn-fn::getatt"></a>
The Amazon Resource Name (ARN) of the service network.

`CreatedAt`  <a name="CreatedAt-fn::getatt"></a>
The date and time that the service network was created, specified in ISO-8601 format.

`Id`  <a name="Id-fn::getatt"></a>
The ID of the service network.

`LastUpdatedAt`  <a name="LastUpdatedAt-fn::getatt"></a>
The date and time of the last update, specified in ISO-8601 format.