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::TransitGatewayConnectPeer TransitGatewayConnectPeerConfiguration

Describes the Connect peer details.
## Syntax

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

```
{
 "[BgpConfigurations](#cfn-ec2-transitgatewayconnectpeer-transitgatewayconnectpeerconfiguration-bgpconfigurations)" : {{[ TransitGatewayAttachmentBgpConfiguration, ... ]}},
 "[InsideCidrBlocks](#cfn-ec2-transitgatewayconnectpeer-transitgatewayconnectpeerconfiguration-insidecidrblocks)" : {{[ String, ... ]}},
 "[PeerAddress](#cfn-ec2-transitgatewayconnectpeer-transitgatewayconnectpeerconfiguration-peeraddress)" : {{String}},
 "[Protocol](#cfn-ec2-transitgatewayconnectpeer-transitgatewayconnectpeerconfiguration-protocol)" : {{String}},
 "[TransitGatewayAddress](#cfn-ec2-transitgatewayconnectpeer-transitgatewayconnectpeerconfiguration-transitgatewayaddress)" : {{String}}
}
```
### YAML

```
 [BgpConfigurations](#cfn-ec2-transitgatewayconnectpeer-transitgatewayconnectpeerconfiguration-bgpconfigurations): {{
 - TransitGatewayAttachmentBgpConfiguration}}
 [InsideCidrBlocks](#cfn-ec2-transitgatewayconnectpeer-transitgatewayconnectpeerconfiguration-insidecidrblocks): {{
 - String}}
 [PeerAddress](#cfn-ec2-transitgatewayconnectpeer-transitgatewayconnectpeerconfiguration-peeraddress): {{String}}
 [Protocol](#cfn-ec2-transitgatewayconnectpeer-transitgatewayconnectpeerconfiguration-protocol): {{String}}
 [TransitGatewayAddress](#cfn-ec2-transitgatewayconnectpeer-transitgatewayconnectpeerconfiguration-transitgatewayaddress): {{String}}
```
## Properties

`BgpConfigurations` 
The BGP configuration details. 
*Required*: No 
*Type*: Array of [TransitGatewayAttachmentBgpConfiguration](aws-properties-ec2-transitgatewayconnectpeer-transitgatewayattachmentbgpconfiguration.md) 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`InsideCidrBlocks` 
The range of interior BGP peer IP addresses. 
*Required*: Yes 
*Type*: Array of String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`PeerAddress` 
The Connect peer IP address on the appliance side of the tunnel. 
*Required*: Yes 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`Protocol` 
The tunnel protocol. 
*Required*: No 
*Type*: String 
*Allowed values*: `gre` 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)
`TransitGatewayAddress` 
The Connect peer IP address on the transit gateway side of the tunnel. 
*Required*: No 
*Type*: String 
*Update requires*: [Replacement](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)</div><div class="naked_ctrl">
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