# CreateTransitGatewayPeering
<a name="API_CreateTransitGatewayPeering"></a>

Creates a transit gateway peering connection.

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

```
POST /transit-gateway-peerings HTTP/1.1
Content-type: application/json

{
   "ClientToken": "string",
   "CoreNetworkId": "string",
   "Tags": [ 
      { 
         "Key": "string",
         "Value": "string"
      }
   ],
   "TransitGatewayArn": "string"
}
```

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

The request does not use any URI parameters.

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

The request accepts the following data in JSON format.

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

 ** [CoreNetworkId](#API_CreateTransitGatewayPeering_RequestSyntax) **   <a name="networkmanager-CreateTransitGatewayPeering-request-CoreNetworkId"></a>
The ID of a core network.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 50.  
Pattern: `^core-network-([0-9a-f]{8,17})$`   
Required: Yes

 ** [Tags](#API_CreateTransitGatewayPeering_RequestSyntax) **   <a name="networkmanager-CreateTransitGatewayPeering-request-Tags"></a>
The list of key-value tags associated with the request.  
Type: Array of [Tag](API_Tag.md) objects  
Required: No

 ** [TransitGatewayArn](#API_CreateTransitGatewayPeering_RequestSyntax) **   <a name="networkmanager-CreateTransitGatewayPeering-request-TransitGatewayArn"></a>
The ARN of the transit gateway for the peering request.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 500.  
Pattern: `[\s\S]*`   
Required: Yes

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

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

{
   "TransitGatewayPeering": { 
      "Peering": { 
         "CoreNetworkArn": "string",
         "CoreNetworkId": "string",
         "CreatedAt": number,
         "EdgeLocation": "string",
         "LastModificationErrors": [ 
            { 
               "Code": "string",
               "Message": "string",
               "MissingPermissionsContext": { 
                  "MissingPermission": "string"
               },
               "RequestId": "string",
               "ResourceArn": "string"
            }
         ],
         "OwnerAccountId": "string",
         "PeeringId": "string",
         "PeeringType": "string",
         "ResourceArn": "string",
         "State": "string",
         "Tags": [ 
            { 
               "Key": "string",
               "Value": "string"
            }
         ]
      },
      "TransitGatewayArn": "string",
      "TransitGatewayPeeringAttachmentId": "string"
   }
}
```

## Response Elements
<a name="API_CreateTransitGatewayPeering_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.

 ** [TransitGatewayPeering](#API_CreateTransitGatewayPeering_ResponseSyntax) **   <a name="networkmanager-CreateTransitGatewayPeering-response-TransitGatewayPeering"></a>
Returns information about the transit gateway peering connection request.  
Type: [TransitGatewayPeering](API_TransitGatewayPeering.md) object

## Errors
<a name="API_CreateTransitGatewayPeering_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_CreateTransitGatewayPeering_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/CreateTransitGatewayPeering) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/networkmanager-2019-07-05/CreateTransitGatewayPeering) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/networkmanager-2019-07-05/CreateTransitGatewayPeering) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/networkmanager-2019-07-05/CreateTransitGatewayPeering) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/networkmanager-2019-07-05/CreateTransitGatewayPeering) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/networkmanager-2019-07-05/CreateTransitGatewayPeering) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/networkmanager-2019-07-05/CreateTransitGatewayPeering) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/networkmanager-2019-07-05/CreateTransitGatewayPeering) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/networkmanager-2019-07-05/CreateTransitGatewayPeering) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/networkmanager-2019-07-05/CreateTransitGatewayPeering)