AWS Transit Gateways supports dynamic and static layer 3 routing between Amazon Virtual Private Clouds (VPCs). Routes determine the next hop depending on the destination IP address of the packet, and can point to an Amazon VPC.

Amazon VPC feature interoperability

AWS Transit Gateway enables the resolution of public DNS hostnames to private IP addresses when queried from Amazon VPCs that are also attached to the AWS Transit Gateway.

An instance in an Amazon VPC can access a NAT gateway, Network Load Balancer, AWS PrivateLink, and Amazon Elastic File System in others Amazon VPCs that are also attached to the AWS Transit Gateway.


AWS Transit Gateway provides statistics and logs that are then used by services such as Amazon CloudWatch and Amazon VPC Flow Logs. You can use Amazon CloudWatch to get bandwidth usage between Amazon VPCs, packet flow count, and packet drop count. You can also enable Amazon VPC Flow Logs on AWS Transit Gateway so you can capture information on the IP traffic routed through the AWS Transit Gateway.


You can use the command-line interface (CLI), AWS Management Console, or AWS CloudFormation to create and manage your AWS Transit Gateway. AWS Transit Gateway provides Amazon CloudWatch metrics, such as the number of bytes sent and received between Amazon VPCs, the packet count, and the drop count. In addition, you can use Amazon VPC Flow Logs with AWS Transit Gateway to capture information about the IP traffic going through the AWS Transit Gateway attachment.


AWS Transit Gateway is integrated with Identity and Access Management (IAM), enabling you to manage access to AWS Transit Gateway securely. Using IAM, you can create and manage users and groups of your AWS services, and use permissions to allow and deny their access to the AWS Transit Gateway.


With Transit Gateway multicast, you can now easily create and manage multicast groups in the cloud, much easier than deploying and managing legacy hardware on premises. You can scale up and down your multicast solution in the cloud to simultaneously distribute a stream of content to multiple subscribers. With Transit Gateway multicast you have fine-grain control on who can produce and who can consume multicast traffic. 

Inter-region peering

AWS Transit Gateway inter-region peering allows customers to route traffic across AWS China Regions. Inter-region peering provides a simple and cost-effective way to share resources between AWS China Regions or replicate data for geographic redundancy.

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