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::NetworkManager::TransitGatewayRouteTableAttachment
<a name="aws-resource-networkmanager-transitgatewayroutetableattachment"></a>

Creates a transit gateway route table attachment.

## Syntax
<a name="aws-resource-networkmanager-transitgatewayroutetableattachment-syntax"></a>

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

### JSON
<a name="aws-resource-networkmanager-transitgatewayroutetableattachment-syntax.json"></a>

```
{
  "Type" : "AWS::NetworkManager::TransitGatewayRouteTableAttachment",
  "Properties" : {
      "[NetworkFunctionGroupName](#cfn-networkmanager-transitgatewayroutetableattachment-networkfunctiongroupname)" : String,
      "[PeeringId](#cfn-networkmanager-transitgatewayroutetableattachment-peeringid)" : String,
      "[ProposedNetworkFunctionGroupChange](#cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange)" : ProposedNetworkFunctionGroupChange,
      "[ProposedSegmentChange](#cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange)" : ProposedSegmentChange,
      "[RoutingPolicyLabel](#cfn-networkmanager-transitgatewayroutetableattachment-routingpolicylabel)" : String,
      "[Tags](#cfn-networkmanager-transitgatewayroutetableattachment-tags)" : [ Tag, ... ],
      "[TransitGatewayRouteTableArn](#cfn-networkmanager-transitgatewayroutetableattachment-transitgatewayroutetablearn)" : String
    }
}
```

### YAML
<a name="aws-resource-networkmanager-transitgatewayroutetableattachment-syntax.yaml"></a>

```
Type: AWS::NetworkManager::TransitGatewayRouteTableAttachment
Properties:
  [NetworkFunctionGroupName](#cfn-networkmanager-transitgatewayroutetableattachment-networkfunctiongroupname): String
  [PeeringId](#cfn-networkmanager-transitgatewayroutetableattachment-peeringid): String
  [ProposedNetworkFunctionGroupChange](#cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange): 
    ProposedNetworkFunctionGroupChange
  [ProposedSegmentChange](#cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange): 
    ProposedSegmentChange
  [RoutingPolicyLabel](#cfn-networkmanager-transitgatewayroutetableattachment-routingpolicylabel): String
  [Tags](#cfn-networkmanager-transitgatewayroutetableattachment-tags): 
    - Tag
  [TransitGatewayRouteTableArn](#cfn-networkmanager-transitgatewayroutetableattachment-transitgatewayroutetablearn): String
```

## Properties
<a name="aws-resource-networkmanager-transitgatewayroutetableattachment-properties"></a>

`NetworkFunctionGroupName`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-networkfunctiongroupname"></a>
The name of the network function group.  
*Required*: No  
*Type*: String  
*Pattern*: `[\s\S]*`  
*Minimum*: `0`  
*Maximum*: `256`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`PeeringId`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-peeringid"></a>
The ID of the transit gateway peering.  
*Required*: Yes  
*Type*: String  
*Pattern*: `^peering-([0-9a-f]{8,17})$`  
*Minimum*: `0`  
*Maximum*: `50`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`ProposedNetworkFunctionGroupChange`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange"></a>
Describes proposed changes to a network function group.   
*Required*: No  
*Type*: [ProposedNetworkFunctionGroupChange](aws-properties-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`ProposedSegmentChange`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange"></a>
This property is read-only. Values can't be assigned to it.  
*Required*: No  
*Type*: [ProposedSegmentChange](aws-properties-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`RoutingPolicyLabel`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-routingpolicylabel"></a>
Property description not available.  
*Required*: No  
*Type*: String  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

`Tags`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-tags"></a>
The list of key-value pairs associated with the transit gateway route table attachment.  
*Required*: No  
*Type*: Array of [Tag](aws-properties-networkmanager-transitgatewayroutetableattachment-tag.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`TransitGatewayRouteTableArn`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-transitgatewayroutetablearn"></a>
The ARN of the transit gateway attachment route table. For example, `"TransitGatewayRouteTableArn": "arn:aws:ec2:us-west-2:123456789012:transit-gateway-route-table/tgw-rtb-9876543210123456"`.  
*Required*: Yes  
*Type*: String  
*Pattern*: `[\s\S]*`  
*Minimum*: `0`  
*Maximum*: `500`  
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)

## Return values
<a name="aws-resource-networkmanager-transitgatewayroutetableattachment-return-values"></a>

### Ref
<a name="aws-resource-networkmanager-transitgatewayroutetableattachment-return-values-ref"></a>

When you pass the logical ID of this resource to the intrinsic `Ref` function, `Ref` returns the attachment ID of the transit gateway route table. For example: `attachment-12367e74104d31234`.

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).

### Fn::GetAtt
<a name="aws-resource-networkmanager-transitgatewayroutetableattachment-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.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html).

#### 
<a name="aws-resource-networkmanager-transitgatewayroutetableattachment-return-values-fn--getatt-fn--getatt"></a>

`AttachmentId`  <a name="AttachmentId-fn::getatt"></a>
The ID of the transit gateway route table attachment.

`AttachmentPolicyRuleNumber`  <a name="AttachmentPolicyRuleNumber-fn::getatt"></a>
The policy rule number associated with the attachment.

`AttachmentType`  <a name="AttachmentType-fn::getatt"></a>
The type of attachment. This will be `TRANSIT_GATEWAY_ROUTE_TABLE`.

`CoreNetworkArn`  <a name="CoreNetworkArn-fn::getatt"></a>
The ARN of the core network.

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

`CreatedAt`  <a name="CreatedAt-fn::getatt"></a>
The timestamp when the transit gateway route table attachment was created.

`EdgeLocation`  <a name="EdgeLocation-fn::getatt"></a>
The Region where the core network edge is located.

`LastModificationErrors`  <a name="LastModificationErrors-fn::getatt"></a>
Property description not available.

`OwnerAccountId`  <a name="OwnerAccountId-fn::getatt"></a>
The ID of the transit gateway route table attachment owner.

`ResourceArn`  <a name="ResourceArn-fn::getatt"></a>
The resource ARN for the transit gateway route table attachment.

`SegmentName`  <a name="SegmentName-fn::getatt"></a>
The name of the attachment's segment.

`State`  <a name="State-fn::getatt"></a>
The state of the attachment. This can be: `REJECTED` \$1 `PENDING_ATTACHMENT_ACCEPTANCE` \$1 `CREATING` \$1 `FAILED` \$1 `AVAILABLE` \$1 `UPDATING` \$1 ` PENDING_NETWORK_UPDATE` \$1 `PENDING_TAG_ACCEPTANCE` \$1 `DELETING`. 

`UpdatedAt`  <a name="UpdatedAt-fn::getatt"></a>
The timestamp when the transit gateway route table attachment was last updated.

# AWS::NetworkManager::TransitGatewayRouteTableAttachment ProposedNetworkFunctionGroupChange
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange"></a>

Describes proposed changes to a network function group. 

## Syntax
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-syntax"></a>

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

### JSON
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-syntax.json"></a>

```
{
  "[AttachmentPolicyRuleNumber](#cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-attachmentpolicyrulenumber)" : Integer,
  "[NetworkFunctionGroupName](#cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-networkfunctiongroupname)" : String,
  "[Tags](#cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-tags)" : [ Tag, ... ]
}
```

### YAML
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-syntax.yaml"></a>

```
  [AttachmentPolicyRuleNumber](#cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-attachmentpolicyrulenumber): Integer
  [NetworkFunctionGroupName](#cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-networkfunctiongroupname): String
  [Tags](#cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-tags): 
    - Tag
```

## Properties
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-properties"></a>

`AttachmentPolicyRuleNumber`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-attachmentpolicyrulenumber"></a>
The proposed new attachment policy rule number for the network function group.  
*Required*: No  
*Type*: Integer  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`NetworkFunctionGroupName`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-networkfunctiongroupname"></a>
The proposed name change for the network function group name.  
*Required*: No  
*Type*: String  
*Pattern*: `[\s\S]*`  
*Minimum*: `0`  
*Maximum*: `256`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Tags`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-proposednetworkfunctiongroupchange-tags"></a>
The list of proposed changes to the key-value tags associated with the network function group.  
*Required*: No  
*Type*: Array of [Tag](aws-properties-networkmanager-transitgatewayroutetableattachment-tag.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

# AWS::NetworkManager::TransitGatewayRouteTableAttachment ProposedSegmentChange
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange"></a>

Describes a proposed segment change. In some cases, the segment change must first be evaluated and accepted. 

## Syntax
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-syntax"></a>

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

### JSON
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-syntax.json"></a>

```
{
  "[AttachmentPolicyRuleNumber](#cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-attachmentpolicyrulenumber)" : Integer,
  "[SegmentName](#cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-segmentname)" : String,
  "[Tags](#cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-tags)" : [ Tag, ... ]
}
```

### YAML
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-syntax.yaml"></a>

```
  [AttachmentPolicyRuleNumber](#cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-attachmentpolicyrulenumber): Integer
  [SegmentName](#cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-segmentname): String
  [Tags](#cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-tags): 
    - Tag
```

## Properties
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-properties"></a>

`AttachmentPolicyRuleNumber`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-attachmentpolicyrulenumber"></a>
The rule number in the policy document that applies to this change.  
*Required*: No  
*Type*: Integer  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`SegmentName`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-segmentname"></a>
The name of the segment to change.  
*Required*: No  
*Type*: String  
*Pattern*: `[\s\S]*`  
*Minimum*: `0`  
*Maximum*: `256`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Tags`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-proposedsegmentchange-tags"></a>
The list of key-value tags that changed for the segment.  
*Required*: No  
*Type*: Array of [Tag](aws-properties-networkmanager-transitgatewayroutetableattachment-tag.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

# AWS::NetworkManager::TransitGatewayRouteTableAttachment Tag
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-tag"></a>

Describes a tag.

## Syntax
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-tag-syntax"></a>

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

### JSON
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-tag-syntax.json"></a>

```
{
  "[Key](#cfn-networkmanager-transitgatewayroutetableattachment-tag-key)" : String,
  "[Value](#cfn-networkmanager-transitgatewayroutetableattachment-tag-value)" : String
}
```

### YAML
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-tag-syntax.yaml"></a>

```
  [Key](#cfn-networkmanager-transitgatewayroutetableattachment-tag-key): String
  [Value](#cfn-networkmanager-transitgatewayroutetableattachment-tag-value): String
```

## Properties
<a name="aws-properties-networkmanager-transitgatewayroutetableattachment-tag-properties"></a>

`Key`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-tag-key"></a>
The tag key.  
Constraints: Maximum length of 128 characters.  
*Required*: Yes  
*Type*: String  
*Pattern*: `[\s\S]*`  
*Minimum*: `0`  
*Maximum*: `10000000`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Value`  <a name="cfn-networkmanager-transitgatewayroutetableattachment-tag-value"></a>
The tag value.  
Constraints: Maximum length of 256 characters.  
*Required*: Yes  
*Type*: String  
*Pattern*: `[\s\S]*`  
*Minimum*: `0`  
*Maximum*: `10000000`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)