# Modify Elastic IP Exit Weight - ModifyEIPWeight

## Overview

Modify the outbound weight of the Elastic IP

 > 💡 This interface is only effective when the EIP is bound to a host or network card (in non-through mode) resource.




## Definition

### Public Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Action**     | string  | Corresponding API command name, the current API is `ModifyEIPWeight`.                      | **Yes** |
| **PublicKey**  | string  | The user's public key can be obtained from [Console](https://console.scloudsg.com/uaccount/api_manage)                                             | **Yes** |
| **Signature**  | string  | User signature generated based on public key and API command, see [Signature Algorithm](/docs/api/summary/signature.md)  | **Yes** |

### Request Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Region** | string | Region. See [List of Regions and Availability Zones](/docs/api/summary/regionlist) |**Yes**|
| **ProjectId** | string | Project ID. If not filled in, the default project is used, sub-accounts must be filled in. Please refer to the [GetProjectList interface](/docs/api/summary/get_project_list). |No|
| **EIPId** | string | Elastic IP Resource ID |**Yes**|
| **Weight** | int | Outbound Internet traffic weight, range [0-100]; This weight value is only effective when the EIP bound resource is a host/network card (non-through mode); When the same host/network card actively accesses the Internet, the EIP with the highest weight will be used as the source IP; When the weights are the same, the behavior is uncertain. |**Yes**|

### Response Field

| Field Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **RetCode** | int | Return status code. If it is 0, it means successful return. If it is not 0, it means failure. |**Yes**|
| **Action** | string | Operation command name. |**Yes**|
| **Message** | string | Returns an error message, providing detailed description when `RetCode` is non-zero. |No|




## Example

### Request Example
    
```
https://api.scloudsg.com/?Action=ModifyEIPWeight
&Region=cn-bj2
&EIPId=eip-XXXXX
&Weight=4
```

### Response Example
    
```json
{
  "Action": "ModifyEIPWeightResponse",
  "Request_uuid": "aad2bbf8-b12e-4057-83dd-XXXXXX",
  "RetCode": 0
}
```