---
subcategory: "Compute Engine"
description: |-
  Manages a Cloud Router interface.
---

# google\_compute\_router_interface

Manages a Cloud Router interface. For more information see
[the official documentation](https://cloud.google.com/compute/docs/cloudrouter)
and
[API](https://cloud.google.com/compute/docs/reference/latest/routers).

## Example Usage

```hcl
resource "google_compute_router_interface" "foobar" {
  name       = "interface-1"
  router     = "router-1"
  region     = "us-central1"
  ip_range   = "169.254.1.1/30"
  vpn_tunnel = "tunnel-1"
}
```

## Argument Reference

The following arguments are supported:

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

* `router` - (Required) The name of the router this interface will be attached to.
    Changing this forces a new interface to be created.

In addition to the above required fields, a router interface must have specified either `ip_range` or exactly one of `vpn_tunnel`, `interconnect_attachment` or `subnetwork`, or both.

- - -

* `ip_range` - (Optional) IP address and range of the interface. The IP range must be
    in the RFC3927 link-local IP space. Changing this forces a new interface to be created.

* `vpn_tunnel` - (Optional) The name or resource link to the VPN tunnel this
    interface will be linked to. Changing this forces a new interface to be created. Only
    one of `vpn_tunnel`, `interconnect_attachment` or `subnetwork` can be specified.

* `interconnect_attachment` - (Optional) The name or resource link to the
    VLAN interconnect for this interface. Changing this forces a new interface to
    be created. Only one of `vpn_tunnel`, `interconnect_attachment` or `subnetwork` can be specified.

* `redundant_interface` - (Optional) The name of the interface that is redundant to
    this interface. Changing this forces a new interface to be created.

* `project` - (Optional) The ID of the project in which this interface's router belongs. 
    If it is not provided, the provider project is used. Changing this forces a new interface to be created.

* `subnetwork` - (Optional) The URI of the subnetwork resource that this interface
    belongs to, which must be in the same region as the Cloud Router. When you establish a BGP session to a VM instance using this interface, the VM instance must belong to the same subnetwork as the subnetwork specified here. Changing this forces a new interface to be created. Only one of `vpn_tunnel`, `interconnect_attachment` or `subnetwork` can be specified.

* `private_ip_address` - (Optional) The regional private internal IP address that is used
    to establish BGP sessions to a VM instance acting as a third-party Router Appliance. Changing this forces a new interface to be created.

* `project` - (Optional) The ID of the project in which this interface's routerbelongs.
    If it is not provided, the provider project is used. Changing this forces a new interface to be created.

* `region` - (Optional) The region this interface's router sits in.
    If not specified, the project region will be used. Changing this forces a new interface to be created.

## Attributes Reference

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

* `id` - an identifier for the resource with format `{{region}}/{{router}}/{{name}}`

## Timeouts

This resource provides the following
[Timeouts](https://developer.hashicorp.com/terraform/plugin/sdkv2/resources/retries-and-customizable-timeouts) configuration options: configuration options:

- `create` - Default is 4 minutes.
- `delete` - Default is 4 minutes.

## Import

Router interfaces can be imported using the `project` (optional), `region`, `router`, and `name`, e.g.

* `{{project_id}}/{{region}}/{{router}}/{{name}}`
* `{{region}}/{{router}}/{{name}}`

In Terraform v1.5.0 and later, use an [`import` block](https://developer.hashicorp.com/terraform/language/import) to import router interfaces using one of the formats above. For example:

```tf
import {
  id = "{{project_id}}/{{region}}/{{router}}/{{name}}"
  to = google_compute_router_interface.default
}
```

When using the [`terraform import` command](https://developer.hashicorp.com/terraform/cli/commands/import), router interfaces can be imported using one of the formats above. For example:

```
$ terraform import google_compute_router_interface.default {{project_id}}/{{region}}/{{router}}/{{name}}
$ terraform import google_compute_router_interface.default {{region}}/{{router}}/{{name}}
```