---
title: "Edit cluster LB subnet"
slug: "nks-lbsubnet"
updated: 2026-09-17T10:05:54Z
published: 2026-09-17T10:05:54Z
canonical: "api.ncloud-docs.com/nks-lbsubnet"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://api.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Edit cluster LB subnet

Available in VPC

Set up a new load balancer subnet if the load balancer subnet set up for the cluster has been deleted.

## Request

This section describes the request format. The method and URI are as follows:

| Method | URI |
| --- | --- |
| PATCH | /vnks/v2/clusters/{uuid}/lb-subnet (Korea Region) |
| PATCH | /vnks/sgn-v2/clusters/{uuid}/lb-subnet (Singapore Region) |
| PATCH | /vnks/jpn-v2/clusters/{uuid}/lb-subnet (Japan Region) |

### Request headers

For information about the headers common to all Ncloud Kubernetes Service APIs, see [Ncloud Kubernetes Service request headers](/docs/en/compute-vpckubernetesservice#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### Request path parameters

You can use the following path parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `uuid` | String | Required | Cluster UUID - See [Get cluster list](/docs/en/nks-getclusterlist). |

### Request query parameters

You can use the following query parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `lbSubnetNo` | Integer | Conditional | Load balancer subnet instance number - Required if `lbSubnetNoList` is not entered - Ignored if `lbSubnetNoList` is entered |
| `lbSubnetNoList` | Array | Conditional | List of load balancer subnet instance numbers - Required if `lbSubnetNo` is not entered. - For multi-zone configurations, enter up to 2 values (one per zone). Only subnets from different zones are allowed. - Enter by repeating the same parameter (`lbSubnetNoList=1000&lbSubnetNoList=2000`) or separating values with commas (`lbSubnetNoList=1000,2000`). - The first value is used as the representative subnet for single-zone load balancers and network load balancers. |
| `igwYn` | String | Optional | Whether it is a public load balancer subnet - `Y` \| `N` (default) - `Y`: Public load balancer subnet - `N`: Private load balancer subnet |

### Request example

The request example is as follows:

```
curl --location --request PATCH 'https://nks.apigw.ntruss.com/vnks/v2/clusters/****a20e-e0fb-4dc9-af1b-97fd3f8d****/lb-subnet?lbSubnetNo=140000' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Sub Account Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}'
```

The following is a sample request to change the subnet for a multi-zone load balancer.

```
curl --location --request PATCH 'https://nks.apigw.ntruss.com/vnks/v2/clusters/****a20e-e0fb-4dc9-af1b-97fd3f8d****/lb-subnet?lbSubnetNoList=140000&lbSubnetNoList=141000' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Sub Account Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}'
```

## Response

This section describes the response format.

### Response body

The response body includes the following data:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `uuid` | String | - | UUID of the cluster |

### Response status codes

For information about the HTTP status codes common to all Ncloud Kubernetes Service APIs, see [Ncloud Kubernetes Service response status codes](/docs/en/compute-vpckubernetesservice#%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

### Response example

The response example is as follows:

```
{
    "uuid": "****a20e-e0fb-4dc9-af1b-97fd3f8d****"
}
```