# CreateDirectConnectGatewayAttachment
<a name="API_CreateDirectConnectGatewayAttachment"></a>

Creates an AWS Direct Connect gateway attachment 

## Request Syntax
<a name="API_CreateDirectConnectGatewayAttachment_RequestSyntax"></a>

```
POST /direct-connect-gateway-attachments HTTP/1.1
Content-type: application/json

{
   "ClientToken": "{{string}}",
   "CoreNetworkId": "{{string}}",
   "DirectConnectGatewayArn": "{{string}}",
   "EdgeLocations": [ "{{string}}" ],
   "NatGatewayRules": [ 
      { 
         "MatchSourceCidr": "{{string}}",
         "NatCidr": "{{string}}",
         "RuleNumber": {{number}}
      }
   ],
   "NatGatewaySupport": "{{string}}",
   "NatSystemRouteSupport": {{boolean}},
   "RoutingPolicyLabel": "{{string}}",
   "Tags": [ 
      { 
         "Key": "{{string}}",
         "Value": "{{string}}"
      }
   ]
}
```

## URI Request Parameters
<a name="API_CreateDirectConnectGatewayAttachment_RequestParameters"></a>

The request does not use any URI parameters.

## Request Body
<a name="API_CreateDirectConnectGatewayAttachment_RequestBody"></a>

The request accepts the following data in JSON format.

 ** [ClientToken](#API_CreateDirectConnectGatewayAttachment_RequestSyntax) **   <a name="networkmanager-CreateDirectConnectGatewayAttachment-request-ClientToken"></a>
client token  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 256.  
Pattern: `[\s\S]*`   
Required: No

 ** [CoreNetworkId](#API_CreateDirectConnectGatewayAttachment_RequestSyntax) **   <a name="networkmanager-CreateDirectConnectGatewayAttachment-request-CoreNetworkId"></a>
The ID of the Cloud WAN core network that the Direct Connect gateway attachment should be attached to.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 50.  
Pattern: `^core-network-([0-9a-f]{8,17})$`   
Required: Yes

 ** [DirectConnectGatewayArn](#API_CreateDirectConnectGatewayAttachment_RequestSyntax) **   <a name="networkmanager-CreateDirectConnectGatewayAttachment-request-DirectConnectGatewayArn"></a>
The ARN of the Direct Connect gateway attachment.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 500.  
Pattern: `^arn:[^:]{1,63}:directconnect::[^:]{0,63}:dx-gateway\/[0-9a-f]{8}-([0-9a-f]{4}-){3}[0-9a-f]{12}$`   
Required: Yes

 ** [EdgeLocations](#API_CreateDirectConnectGatewayAttachment_RequestSyntax) **   <a name="networkmanager-CreateDirectConnectGatewayAttachment-request-EdgeLocations"></a>
One or more core network edge locations that the Direct Connect gateway attachment is associated with.   
Type: Array of strings  
Length Constraints: Minimum length of 1. Maximum length of 63.  
Pattern: `[\s\S]*`   
Required: Yes

 ** [NatGatewayRules](#API_CreateDirectConnectGatewayAttachment_RequestSyntax) **   <a name="networkmanager-CreateDirectConnectGatewayAttachment-request-NatGatewayRules"></a>
The NAT rules for the Direct Connect gateway attachment, up to 50 rules.  
Type: Array of [NatRuleRequest](API_NatRuleRequest.md) objects  
Array Members: Minimum number of 0 items. Maximum number of 50 items.  
Required: No

 ** [NatGatewaySupport](#API_CreateDirectConnectGatewayAttachment_RequestSyntax) **   <a name="networkmanager-CreateDirectConnectGatewayAttachment-request-NatGatewaySupport"></a>
Specifies whether to enable NAT gateway support on the Direct Connect gateway attachment. To enable NAT gateway support, you must also specify at least one NAT rule. If you don't specify a value, NAT gateway support is disabled. Only the core network owner can configure NAT on an attachment.  
Type: String  
Valid Values: `ENABLE | DISABLE`   
Required: No

 ** [NatSystemRouteSupport](#API_CreateDirectConnectGatewayAttachment_RequestSyntax) **   <a name="networkmanager-CreateDirectConnectGatewayAttachment-request-NatSystemRouteSupport"></a>
Specifies whether the core network installs system routes for the NAT CIDR blocks of the attachment's NAT rules. System routes have a route type of `SYSTEM`. NAT is applied to traffic whether or not this option is enabled. The default is `true`.  
Type: Boolean  
Required: No

 ** [RoutingPolicyLabel](#API_CreateDirectConnectGatewayAttachment_RequestSyntax) **   <a name="networkmanager-CreateDirectConnectGatewayAttachment-request-RoutingPolicyLabel"></a>
The routing policy label to apply to the Direct Connect Gateway attachment for traffic routing decisions.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 256.  
Pattern: `[\s\S]*`   
Required: No

 ** [Tags](#API_CreateDirectConnectGatewayAttachment_RequestSyntax) **   <a name="networkmanager-CreateDirectConnectGatewayAttachment-request-Tags"></a>
The key value tags to apply to the Direct Connect gateway attachment during creation.  
Type: Array of [Tag](API_Tag.md) objects  
Required: No

## Response Syntax
<a name="API_CreateDirectConnectGatewayAttachment_ResponseSyntax"></a>

```
HTTP/1.1 200
Content-type: application/json

{
   "DirectConnectGatewayAttachment": { 
      "Attachment": { 
         "AttachmentId": "string",
         "AttachmentPolicyRuleNumber": number,
         "AttachmentType": "string",
         "CoreNetworkArn": "string",
         "CoreNetworkId": "string",
         "CreatedAt": number,
         "EdgeLocation": "string",
         "EdgeLocations": [ "string" ],
         "LastModificationErrors": [ 
            { 
               "Code": "string",
               "Message": "string",
               "RequestId": "string",
               "ResourceArn": "string"
            }
         ],
         "NatGatewaySupport": "string",
         "NatSystemRouteSupport": boolean,
         "NetworkFunctionGroupName": "string",
         "OwnerAccountId": "string",
         "ProposedNetworkFunctionGroupChange": { 
            "AttachmentPolicyRuleNumber": number,
            "NetworkFunctionGroupName": "string",
            "Tags": [ 
               { 
                  "Key": "string",
                  "Value": "string"
               }
            ]
         },
         "ProposedSegmentChange": { 
            "AttachmentPolicyRuleNumber": number,
            "SegmentName": "string",
            "Tags": [ 
               { 
                  "Key": "string",
                  "Value": "string"
               }
            ]
         },
         "ResourceArn": "string",
         "SegmentName": "string",
         "State": "string",
         "Tags": [ 
            { 
               "Key": "string",
               "Value": "string"
            }
         ],
         "UpdatedAt": number
      },
      "DirectConnectGatewayArn": "string"
   }
}
```

## Response Elements
<a name="API_CreateDirectConnectGatewayAttachment_ResponseElements"></a>

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

 ** [DirectConnectGatewayAttachment](#API_CreateDirectConnectGatewayAttachment_ResponseSyntax) **   <a name="networkmanager-CreateDirectConnectGatewayAttachment-response-DirectConnectGatewayAttachment"></a>
Describes the details of a `CreateDirectConnectGatewayAttachment` request.  
Type: [DirectConnectGatewayAttachment](API_DirectConnectGatewayAttachment.md) object

## Errors
<a name="API_CreateDirectConnectGatewayAttachment_Errors"></a>

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** AccessDeniedException **   
You do not have sufficient access to perform this action.  
HTTP Status Code: 403

 ** ConflictException **   
There was a conflict processing the request. Updating or deleting the resource can cause an inconsistent state.    
 ** ResourceId **   
The ID of the resource.  
 ** ResourceType **   
The resource type.
HTTP Status Code: 409

 ** InternalServerException **   
The request has failed due to an internal error.    
 ** RetryAfterSeconds **   
Indicates when to retry the request.
HTTP Status Code: 500

 ** ResourceNotFoundException **   
The specified resource could not be found.    
 ** Context **   
The specified resource could not be found.  
 ** ResourceId **   
The ID of the resource.  
 ** ResourceType **   
The resource type.
HTTP Status Code: 404

 ** ThrottlingException **   
The request was denied due to request throttling.    
 ** RetryAfterSeconds **   
Indicates when to retry the request.
HTTP Status Code: 429

 ** ValidationException **   
The input fails to satisfy the constraints.    
 ** Fields **   
The fields that caused the error, if applicable.  
 ** Reason **   
The reason for the error.
HTTP Status Code: 400

## See Also
<a name="API_CreateDirectConnectGatewayAttachment_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/networkmanager-2019-07-05/CreateDirectConnectGatewayAttachment) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/networkmanager-2019-07-05/CreateDirectConnectGatewayAttachment) 
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/networkmanager-2019-07-05/CreateDirectConnectGatewayAttachment) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/networkmanager-2019-07-05/CreateDirectConnectGatewayAttachment) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/networkmanager-2019-07-05/CreateDirectConnectGatewayAttachment) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/networkmanager-2019-07-05/CreateDirectConnectGatewayAttachment) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/networkmanager-2019-07-05/CreateDirectConnectGatewayAttachment) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/networkmanager-2019-07-05/CreateDirectConnectGatewayAttachment) 
+  [AWS SDK for Python (Boto3)](https://docs.aws.amazon.com/goto/boto3/networkmanager-2019-07-05/CreateDirectConnectGatewayAttachment) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/networkmanager-2019-07-05/CreateDirectConnectGatewayAttachment)