Create a VPC attachment using Amazon VPC Transit Gateways

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Create a VPC attachment using Amazon VPC Transit Gateways - Amazon VPC

Open the Amazon VPC console at https://console.aws.amazon.com/vpc/.
On the navigation pane, choose Transit Gateway Attachments.
Choose Create transit gateway attachment.
For Name tag, optionally enter a name for the transit gateway attachment.
For Transit gateway ID, choose the transit gateway for the attachment. You can choose a transit gateway that you own or a transit gateway that was shared with you.
For Attachment type, choose VPC.
Choose whether to enable DNS Support, IPv6 Support and Appliance mode support.

If appliance mode is chosen, traffic flow between a source and destination uses the same Availability Zone for the VPC attachment for the lifetime of that flow.
Choose whether to enable Security Group Referencing support. Enable this feature to reference a security group across VPCs attached to a transit gateway. For more information about security group referencing, see Security group referencing.
Choose whether to enable IPv6 Support.
For VPC ID, choose the VPC to attach to the transit gateway.

This VPC must have at least one subnet associated with it.
For Subnet IDs, select one subnet for each Availability Zone to be used by the transit gateway to route traffic. You must select at least one subnet. You can select only one subnet per Availability Zone.
Choose Create transit gateway attachment.