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| Terraform template | route-tables.tf |
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Other Resources
Transit Gateway Attachment
We recommend that you do not import the Transit Gateway Attachment resource directly into your Terraform configuration. The utility-resources.tf template provides a Terraform data source that you can use in your configuration when you need to reference the TGW ID or the TGW Attachment ID elsewhere in your Terraform.
Secondary VPC CIDR Block
Each customer VPC had secondary a CIDR block added to it. The utility subnets were created from this CIDR. We do not recommend adding a aws_vpc_ipv4_cidr_block_association resource to your Terraform configuration in order to manage this secondary CIDR block into your Terraform configuration. The reason behind this is that these secondary CIDRs were allocated using Amazon VPC IP Address Manager (IPAM) and customers do not have privileges to these IPAM resources.
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