terraform-provider-google/website/docs/r/compute_subnetwork.html.markdown

---
layout: "google"
page_title: "Google: google_compute_subnetwork"
sidebar_current: "docs-google-compute-subnetwork-x"
description: |-
  Manages a subnetwork within GCE.
---

# google\_compute\_subnetwork

Manages a subnetwork within GCE. For more information see
[the official documentation](https://cloud.google.com/compute/docs/vpc/#vpc_networks_and_subnets)
and
[API](https://cloud.google.com/compute/docs/reference/latest/subnetworks).

## Example Usage

```hcl
resource "google_compute_subnetwork" "default-us-east1" {
  name          = "default-us-east1"
  ip_cidr_range = "10.0.0.0/16"
  network       = "${google_compute_network.default.self_link}"
  region        = "us-east1"
}

resource "google_compute_network" "default" {
  name = "test"
}
```

## Argument Reference

The following arguments are supported:

* `ip_cidr_range` - (Required) The IP address range that machines in this
    network are assigned to, represented as a CIDR block.

* `name` - (Required) A unique name for the resource, required by GCE.
    Changing this forces a new resource to be created.

* `network` - (Required) The network name or resource link to the parent
    network of this subnetwork. The parent network must have been created
    in custom subnet mode.

- - -

* `description` - (Optional) Description of this subnetwork.

* `project` - (Optional) The ID of the project in which the resource belongs. If it
    is not provided, the provider project is used.

* `region` - (Optional) The region this subnetwork will be created in. If
    unspecified, this defaults to the region configured in the provider.

* `private_ip_google_access` - (Optional) Whether the VMs in this subnet
    can access Google services without assigned external IP
    addresses.

* `enable_flow_logs` - (Optional, [Beta](/docs/providers/google/index.html#beta-features))
    Set to `true` to enable [flow logs](https://cloud.google.com/vpc/docs/using-flow-logs)
    for this subnetwork.


- - -

* `secondary_ip_range` - (Optional, [Beta](/docs/providers/google/index.html#beta-features)) An array of configurations for secondary IP ranges for VM instances contained in this subnetwork. Structure is documented below.

The `secondary_ip_range` block supports:

* `range_name` - (Required) The name associated with this subnetwork secondary range, used when adding an alias IP range to a VM instance.

* `ip_cidr_range` - (Required) The range of IP addresses belonging to this subnetwork secondary range. Ranges must be unique and non-overlapping with all primary and secondary IP ranges within a network.

## Attributes Reference

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

* `gateway_address` - The IP address of the gateway.

* `self_link` - The URI of the created resource.

## Timeouts

This resource provides the following
[Timeouts](/docs/configuration/resources.html#timeouts) configuration options:

- `create` - Default is `6 minutes`
- `update` - Default is `6 minutes`
- `delete` - Default is `6 minutes`

## Import

Subnetwork can be imported using the `region` and `name`, e.g.

```
$ terraform import google_compute_subnetwork.default-us-east1 us-east1/default-us-east1
```