https://fortinetcloudcse.github.io/fortinet-ui-terraform/3_example_templates/3_3_ha_pair/3_3_operations.htmlTransit Gateway Routing Two-Stage Routing Approach The ha_pair template implements automatic TGW route updates: Stage 1: After existing_vpc_resources deployment East/West spoke VPC default routes –> Management VPC attachment Allows spoke instances to bootstrap via jump box NAT Stage 2: After ha_pair deployment ha_pair template deletes old default routes from east/west TGW route tables Creates new default routes –> Inspection VPC attachment Traffic now flows through FortiGate HA pair Management VPC routes remain for ongoing access This two-stage approach is handled automatically by tgw_routes.tf.Hugoen-US