> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/api-reference/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/api-reference/networking/cdn/domain/startdomain.md).

# StartDomain

## 1. API Description

This interface is used to enable an acceleration domain.

{% hint style="info" %}
**Note**

* An acceleration domain can only be successfully called when it is in the `Stopped` state.
* This interface is asynchronous. After a successful return from the interface, the operation to enable the acceleration domain is not immediately completed. During this period, the state of the acceleration domain will be `Deploying`. You can check the accelerator status by calling the `DescribeCdnDomains` interface. If the acceleration domain status (domainStatus) changes from `Deploying` (in deployment) to `Deployed` (deployment successful), it indicates that the deployment is successful. `Failed` indicates deployment failure.
  {% endhint %}

## 2. Request Parameters

The following request parameters list only includes the required parameters for the interface.

| Parameter Name | Required | Type   | Description            |
| -------------- | -------- | ------ | ---------------------- |
| domainId       | Yes      | String | Acceleration domain Id |

## 3. Output Parameters

| Parameter Name | Type   | Description                                                                                 |
| -------------- | ------ | ------------------------------------------------------------------------------------------- |
| requestId      | String | Unique request ID, returned with each request. Provide this requestId when locating issues. |

## 4. Code Example

{% tabs %}
{% tab title="Example" %}

1. **Enable Acceleration Domain**

```json
POST / HTTP/1.1
Host: console.zenlayer.com/api/v2/cdn
Content-Type: application/json
X-ZC-Action: StartDomain
<Common Request Params>

Request:
{
    "domainId": "domainIdxxxxx"
}


Response:
{
    "requestId": "TEEFDCA5B-76FB-4E91-A18E-DF7F5D2CE41F",
}
```

{% endtab %}
{% endtabs %}

## 5. Error Codes

The following includes error codes encountered in business logic. For other error codes, see [Common Error Codes](/api-reference/api-introduction/instruction/commonerrorcode.md).

| HTTP Status Code | Error Code                        | Description                                      |
| ---------------- | --------------------------------- | ------------------------------------------------ |
| 404              | INVALID\_DOMAIN\_NOT\_FOUND       | The specified accelerated domain does not exist. |
| 403              | DOMAIN\_OPERATION\_NO\_PERMISSION | Operation denied due to lack of permission.      |


---

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