# UnassignNetworkInterfaceIpv4

## 1. API Description

This API (UnassignNetworkInterfaceIpv4) is used to unassign the private IPv4 from the vNIC.

{% hint style="info" %} <mark style="color:blue;">**Note**</mark>

* <mark style="color:blue;">The default public IPv4 on the vNIC cannot be unassigned.</mark>
* <mark style="color:blue;">When a vNIC has elastic public IPs assigned, its private IP cannot be unassigned.</mark>
  {% endhint %}

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name          | Required | Type            | Description                                                                                                                                                                  |
| ----------------------- | -------- | --------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| nicId                   | Yes      | String          | ID of the vNIC.                                                                                                                                                              |
| ipAddress \[Deprecated] | No       | String          | <p>The IPv4 address to unassign.</p><p>This field is deprecated; use <code>ipAddresses</code> instead. If both are specified, <code>ipAddresses</code> takes precedence.</p> |
| ipAddresses             | No       | Array of String | Private IPv4 to unassign.                                                                                                                                                    |

## 3. Output Parameters

| Parameter Name | Type   | Description                                                                                                           |
| -------------- | ------ | --------------------------------------------------------------------------------------------------------------------- |
| requestId      | String | <p>The unique request ID, which is returned for each request.</p><p>RequestId is required for locating a problem.</p> |

## 4. Code Example

{% tabs %}
{% tab title="Example" %}
**Unassign the private IPv4 from the vNIC.**

```json
POST /api/v2/zec HTTP/1.1
Host: console.zenlayer.com
Content-Type: application/json
X-ZC-Action: UnassignNetworkInterfaceIpv4
<Common Request Params>

Request：
{
  "nicId": "<nicId>",
  "ipAddresses": ["10.0.0.2"]
}

Response：
{
  "requestId": "T05992D0C-7E8B-4047-B0C0-780F2CD549D3",
  "response": {
    "requestId": "T05992D0C-7E8B-4047-B0C0-780F2CD549D3"
  }
}
```

{% endtab %}
{% endtabs %}

## 5. Developer Resources

Zenlayer Cloud API 2.0 integrates [SDKs](/api-reference/api-introduction/toolkit/api-sdk.md)，to make it easier for you to call APIs. More programming languages will be supported.

## 6. Error Codes

The following only lists the error codes related to the API business logic. For other error codes, see [Common Error Codes](/api-reference/api-introduction/instruction/commonerrorcode.md).

| HTTP Status Code | Error Code                                  | Description                                                                                          |
| ---------------- | ------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
| 409              | INVALID\_NIC\_LB\_ASSOCIATED                | Operation is not supported because the private IP is associated with a load balancer backend server. |
| 404              | INVALID\_NIC\_NOT\_FOUND                    | vNIC does not exist.                                                                                 |
| 409              | INVALID\_NIC\_PRIMARY\_IP\_CANT\_DETACH     | The default public IPv4 on the vNIC cannot be unassigned.                                            |
| 400              | INVALID\_NIC\_STATUS                        | Current vNIC state does not allow this operation.                                                    |
| 409              | INVALID\_NIC\_HAS\_PUBLIC\_IP\_CANT\_DETACH | Operation is not supported when elastic public IP(s) are assigned.                                   |


---

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