What problem does it solve? Connecting many VPCs and on-premises networks with point-to-point peering creates an unmanageable mesh, and misconfiguring a central transit gateway can silently drop traffic or expose isolated environments. This Skill provides expert procedures for building and operating AWS Transit Gateway correctly. ## Core Features & Use Cases - Hub and VPC Attachments: Create a Regional transit gateway, attach VPCs with dedicated per-Availability-Zone subnets, and check for overlapping CIDRs before connecting. - Segmentation and Inspection: Isolate environments with route tables, centralize egress through a GWLB or appliances, and force east-west traffic through AWS Network Firewall. - Hybrid and Multi-Region Connectivity: Connect on-premises networks over Site-to-Site VPN (with ECMP and acceleration) or Direct Connect, peer transit gateways across Regions, and migrate off VPC peering meshes. - Use Case: A platform team needs to connect 20 VPCs, isolate production from development, and route all outbound traffic through one inspected egress VPC. The Skill routes them to the matching reference procedure with exact CLI commands and security controls. ## Quick Start Ask the assistant to create a transit gateway in us-east-1 and attach your VPCs with segmentation disabled by default, following the transitgateway skill.
