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::NetworkPerformanceMetricSubscription

Describes Infrastructure Performance subscriptions.
## Syntax

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

```
{
 "Type" : "AWS::EC2::NetworkPerformanceMetricSubscription",
 "Properties" : {
 "[Destination](#cfn-ec2-networkperformancemetricsubscription-destination)" : {{String}},
 "[Metric](#cfn-ec2-networkperformancemetricsubscription-metric)" : {{String}},
 "[Source](#cfn-ec2-networkperformancemetricsubscription-source)" : {{String}},
 "[Statistic](#cfn-ec2-networkperformancemetricsubscription-statistic)" : {{String}}
 }
}
```
### YAML

```
Type: AWS::EC2::NetworkPerformanceMetricSubscription
Properties:
 [Destination](#cfn-ec2-networkperformancemetricsubscription-destination): {{String}}
 [Metric](#cfn-ec2-networkperformancemetricsubscription-metric): {{String}}
 [Source](#cfn-ec2-networkperformancemetricsubscription-source): {{String}}
 [Statistic](#cfn-ec2-networkperformancemetricsubscription-statistic): {{String}}
```
## Properties

`Destination` 
The Region or Availability Zone that's the target for the subscription. For example, `eu-west-1`. 
*Required*: Yes 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`Metric` 
The metric used for the subscription. 
*Required*: Yes 
*Type*: String 
*Allowed values*: `aggregate-latency` 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`Source` 
The Region or Availability Zone that's the source for the subscription. For example, `us-east-1`. 
*Required*: Yes 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`Statistic` 
The statistic used for the subscription. 
*Required*: Yes 
*Type*: String 
*Allowed values*: `p50` 
*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 `primaryIdentifier` property, which consists of the following properties: `source`, `destination`, `metric`, and `statistic`, with each value separated by a pipe (\|). For example, `{ "Ref": "us-east-1|us-east-2|aggregate-latency|p50" }`.
For more information about using the `Ref` function, see [https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html).</div><div class="naked_ctrl">
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