# ModifyVpcAttribute

## 1. API Description

This API (ModifyVpcAttribute) is used to modify the attributes of a global VPC.

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name  | Required | Type    | Description                                                                                                                                                                                                                                                                                                  |
| --------------- | -------- | ------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| vpcId           | Yes      | String  | Global VPC ID.                                                                                                                                                                                                                                                                                               |
| vpcName         | No       | String  | <p>Global VPC name.</p><p>This parameter must start and end with a number or a letter, containing 2 to 63 characters. Only letters, numbers, -/\_ and periods (.) are supported.</p>                                                                                                                         |
| cidrBlock       | No       | String  | <p>IPv4 CIDR block to be modified.</p><p>The IPv4 CIDR block should be a valid subnet within these ranges:</p><p>10.0.0.0/9 10.128.0.0/9 172.16.0.0/12 192.168.0.0/16</p><p>If the global VPC has subnets, the new CIDR must include the original CIDR.</p><p>The default global VPC cannot be modified.</p> |
| enableIPv6      | No       | Boolean | Whether to enable the private IPv6 CIDR block. Currently, only enabling ( true ) is allowed. Once enabled, private IPv6 CIDR block function cannot be disabled.                                                                                                                                              |
| securityGroupId | No       | String  | <p>Modifies the security group ID associated to the VPC.</p><p>If not specified, no changes will be made.</p>                                                                                                                                                                                                |

## 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" %}
**Modify the information of a global VPC, and enable the private IPv6 CIDR block.**

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

Request：
{
    "vpcId": "<vpcId>",
    "vpcName": "TestVpcName",
    "enableIpv6": true
}

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                                                        |
| ---------------- | ------------------------------------------- | ------------------------------------------------------------------ |
| 400              | INVALID\_CIDR\_BLOCK\_FORMAT                | Invalid CIDR block format.                                         |
| 400              | INVALID\_CIDR\_BLOCK\_NETMASK\_RANGE        | CIDR block range is invalid.                                       |
| 400              | INVALID\_CIDR\_BLOCK\_NOT\_EMPTY            | CIDR block cannot be empty.                                        |
| 400              | INVALID\_CIDR\_BLOCK\_NOT\_LAN\_IP          | CIDR block must be a private IP range.                             |
| 400              | INVALID\_IP\_BROADCAST\_ADDRESS             | The IP address cannot be a broadcast address.                      |
| 404              | INVALID\_SECURITY\_GROUP\_NOT\_FOUND        | The specified security group does not exist.                       |
| 404              | INVALID\_VPC\_NOT\_FOUND                    | The global VPC does not exist.                                     |
| 400              | OPERATION\_DENIED\_DEFAULT\_VPC             | The default global VPC cannot be modified.                         |
| 400              | OPERATION\_DENIED\_VPC\_CANT\_DISABLE\_IPV6 | Once enabled, IPv6 CIDR block function cannot be disabled.         |
| 400              | OPERATION\_DENIED\_VPC\_CIDR\_CONFLICT      | CIDR blocks conflict. The new CIDR must include the original CIDR. |


---

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