README.md

Transit Gateway

Network topologies can become complicated

Solution to this is Transit Gateway

• For having transitive peering between thousands of VPC and on-premises, hub-and-spoke (star) connection
• Regional resource, can work cross-region
• Share cross-account using Resource Access Manager (RAM)
• You can peer Transit Gateways across regions
• Route Tables: limit which VPC can talk with other VPC
• Works with Direct Connect Gateway, VPN connections
• Supports $IPMulticast$ (not supported by any other AWS service)

Site to Site VPN ECMP

• ECMP = Equal-cost multi-path routing
• Routing strategy to allow to forward a packet over multiple best path
• Use case: create multiple Site-to-Site VPN connections to increase the bandwidth of your connection to AWS

Throughput with ECMP

VPN To Private Gateway

VPN To Transit Gateway

Share Direct Connect between multiple accounts