Transit Gateways
Table of Contents
1 Introduction
A Transit Gateway is a virtual router which can be leveraged to route traffic between VPCs. Some important properties are:
- DefaultRouteTableAssociation: when enabled, all transit gateway attachments are automatically added to a default route table. Note this table is the default association route table, and the default propagation route table.
- DefaultRouteTablePropagation: enables automatic propagation of routes to the default propagation route table
2 Definitions
Transit Gateway Route Tables: when a Transit Gateway is created, all Transit Gateway attachments are automatically added to a default route table. All transit gateway attachments will also have this route table set as Example:
Destination Target Route Type VPC A CIDR Attachment for VPC A propagated VPC B CIDR Attachment for VPC B propagated VPC C CIDR Attachment for VPC C propagated