> 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/zec/qos-policy-group/modifyqospolicygroup.md).

# ModifyQosPolicyGroup

## 1. API Description

This API (ModifyQosPolicyGroup) is used to modify the name or bandwidth limit of a QoS policy group.

{% hint style="info" %}
**Bandwidth Limit**

* The minimum bandwidth limit is 10,000 Mbps (10G) by default.
* If you need a bandwidth limit lower than 10G, please contact [Zenlayer Support](https://www.zenlayer.com/support/).
  {% endhint %}

## 2. Input Parameters

The following request parameter list only provides API request parameters.

| Parameter Name   | Required | Type                                                                       | Description                                                                                                |
| ---------------- | -------- | -------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------- |
| qosPolicyGroupId | Yes      | String                                                                     | QoS policy group ID.                                                                                       |
| name             | No       | String                                                                     | <p>New name for the QoS policy group.</p><p>Cannot exceed 64 characters.</p>                               |
| bandwidthLimit   | No       | Integer                                                                    | <p>New bandwidth limit, in Mbps.</p><p>Maximum is 100,000,000 Mbps.</p><p>Value range: \[-, 100000000]</p> |
| rateLimitMode    | No       | [RateLimitMode](/api-reference/compute/zec/datastructure.md#ratelimitmode) | New rate limit mode.                                                                                       |

## 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" %}
**1. Modify the name and bandwidth limit of a QoS policy group.**

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

Request：
{
  "qosPolicyGroupId": "qos-xxxxxxxx",
  "name": "new-qos-group-name",
  "bandwidthLimit": 2000,
  "rateLimitMode": "STRICT"
}

Response：
{
  "requestId": "TEEFDCA5B-76FB-4E91-A18E-DF7F5D2CE41F",
  "response": {
    "requestId": "TEEFDCA5B-76FB-4E91-A18E-DF7F5D2CE41F"
  }
}
```

{% 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                                      |
| ---------------- | ----------------------------------------- | ------------------------------------------------ |
| 404              | INVALID\_QOS\_POLICY\_GROUP\_NOT\_FOUND   | The QoS policy group does not exist.             |
| 400              | INVALID\_BANDWIDTH\_LIMIT\_OUT\_OF\_RANGE | The bandwidth limit is out of the allowed range. |