> 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/compute/bmc/cidr-block/bindcidrblockips.md).

# BindCidrBlockIps

## 1. API Description

This API (BindCidrBlockIps) is used to bind one or more CIDR block IPs to instances.

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

* <mark style="color:blue;">Only operations on</mark> <mark style="color:blue;">CIDR blocks in</mark> <mark style="color:blue;">`AVAILABLE`</mark> <mark style="color:blue;">status are supported.</mark>
* <mark style="color:blue;">CIDR block</mark> <mark style="color:blue;">IPs can only be assigned to instances in the same zone.</mark>
* <mark style="color:blue;">The instance to be assigned a</mark> <mark style="color:blue;">CIDR block</mark> <mark style="color:blue;">IP should be in status of</mark> <mark style="color:blue;">`RUNNING`</mark><mark style="color:blue;">.</mark>
* <mark style="color:blue;">This API is an async API. A request ID is returned after the request is sent. However, it does not mean the binding has been completed. You can use</mark> [<mark style="color:purple;">`DescribeCidrBlockIps`</mark>](/api-reference/compute/bmc/cidr-block/describecidrblockips.md) <mark style="color:blue;">to query the status of the</mark> <mark style="color:blue;">CIDR block</mark> <mark style="color:blue;">IPs.</mark>
* <mark style="color:blue;">You need first assign an IPv4 CIDR to the instance before adding another IPv6 CIDR.</mark>
  {% endhint %}

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name | Required | Type                                                                            | Description                                                                                                     |
| -------------- | -------- | ------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------- |
| ipBindList     | Yes      | Array of [IpBindParam](/api-reference/compute/bmc/datastructure.md#ipbindparam) | List of IPs to be assigned.                                                                                     |
| cidrBlockId    | Yes      | String                                                                          | <p>ID of the CIDR block.</p><p>You can find the cidrBlockId in the response by calling DescribeCidrBlocks .</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" %}
Assign CIDR block IPs to instances.

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

Request:
{
  "cidrBlockId": "cidrBlockId",
  "ipBindList": [
    {
      "instanceId": "instanceId1",
      "ip": "1111:1111:2:25::2"
    },
    {
      "instanceId": "instanceId2",
      "ip": "1.1.1.1"
    }
  ]
}

Response:
{
  "requestId": "T2979BBDB-5B06-444F-857E-93FEFE665C0D",
  "response": {
    "requestId": "T2979BBDB-5B06-444F-857E-93FEFE665C0D"
  }
}
```

{% 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                                                        |
| ---------------- | ----------------------------------------------------- | ------------------------------------------------------------------ |
| 403              | OPERATION\_DENIED\_SERVER\_NO\_IPV4                   | The specified instance does not have an IPv4 address.              |
| 403              | OPERATION\_DENIED\_CIDRBLOCK\_IP\_COUNT\_REACH\_LIMIT | The number of assigned IPs has reached the limit.                  |
| 403              | OPERATION\_DENIED\_DIFFERENT\_ZONE                    | Instances can only be added into the subnet in the same zone.      |
| 403              | OPERATION\_DENIED\_CIDRBLOCK\_RECYCLED                | This operation is not supported for CIDR block in the recycle bin. |
| 404              | INVALID\_CIDRBLOCK\_NOT\_FOUND                        | The specified CIDR block does not exist.                           |
| 403              | OPERATION\_DENIED\_INSTANCE\_NOT\_RUNNING             | Only operations on instances in RUNNING status are supported.      |
| 404              | INVALID\_INSTANCE\_NOT\_FOUND                         | Instance does not exist.                                           |


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.console.zenlayer.com/api-reference/compute/bmc/cidr-block/bindcidrblockips.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.