Transit Gateway inter-Region peering - Network Orchestration for AWS Transit Gateway

Transit Gateway inter-Region peering

You can use Transit Gateway peering to directly route traffic between two transit gateways in the same AWS Region or across Regions. This section provides information about how this solution supports peering.

Architecture diagram of AWS resources deployed to support Transit Gateway inter-Region peering.

inter region architecture

  1. When you tag the transit gateway, an EventBridge event initiates. The target for this event is the transit gateway peering attachment Lambda function in the hub account.

  2. The tgw-peering Lambda function creates the peering attachment between the transit gateways based on the tag key and value. The peering attachment state transitions from InitializingRequest to PendingAcceptance.

  3. The Lambda function accepts the peering attachment request in the remote Region.

  4. The solution sets the peering attachment state to Available.