» aws_default_route_table

Provides a resource to manage a Default VPC Routing Table.

Each VPC created in AWS comes with a Default Route Table that can be managed, but not destroyed. This is an advanced resource, and has special caveats to be aware of when using it. Please read this document in its entirety before using this resource. It is recommended you do not use both aws_default_route_table to manage the default route table and use the aws_main_route_table_association, due to possible conflict in routes.

The aws_default_route_table behaves differently from normal resources, in that Terraform does not create this resource, but instead attempts to "adopt" it into management. We can do this because each VPC created has a Default Route Table that cannot be destroyed, and is created with a single route.

When Terraform first adopts the Default Route Table, it immediately removes all defined routes. It then proceeds to create any routes specified in the configuration. This step is required so that only the routes specified in the configuration present in the Default Route Table.

For more information about Route Tables, see the AWS Documentation on Route Tables.

For more information about managing normal Route Tables in Terraform, see our documentation on aws_route_table.

» Example usage with tags:

resource "aws_default_route_table" "r" {
  default_route_table_id = "${aws_vpc.foo.default_route_table_id}"

  route {
    # ...

  tags = {
    Name = "default table"

» Argument Reference

The following arguments are supported:

  • default_route_table_id - (Required) The ID of the Default Routing Table.
  • route - (Optional) A list of route objects. Their keys are documented below.
  • tags - (Optional) A mapping of tags to assign to the resource.
  • propagating_vgws - (Optional) A list of virtual gateways for propagation.

» route Argument Reference

One of the following destination arguments must be supplied:

One of the following target arguments must be supplied:

Note that the default route, mapping the VPC's CIDR block to "local", is created implicitly and cannot be specified.

» Attributes Reference

In addition to all arguments above, the following attributes are exported:

  • id - The ID of the routing table
  • owner_id - The ID of the AWS account that owns the route table