Self-provisioning a VPC per stack hits the soft 5-VPC/region quota, capping concurrent boxes.
Add aws/template-shared.yaml that takes a mandatory AWS::EC2::Subnet::Id (real console picker) and creates NO network, so N boxes share one pre-built IPv6 subnet (0 VPCs each). Keep the current self-provisioning template as the single-box 1-click.
Note: CFN can't offer an optional picker (AWS-typed params are mandatory; a plain String loses the dropdown), which is why this is a second template rather than a toggle on the existing one.
Self-provisioning a VPC per stack hits the soft 5-VPC/region quota, capping concurrent boxes.
Add
aws/template-shared.yamlthat takes a mandatoryAWS::EC2::Subnet::Id(real console picker) and creates NO network, so N boxes share one pre-built IPv6 subnet (0 VPCs each). Keep the current self-provisioning template as the single-box 1-click.Note: CFN can't offer an optional picker (AWS-typed params are mandatory; a plain String loses the dropdown), which is why this is a second template rather than a toggle on the existing one.