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Cloud Enterprise Network:CreateCen

Last Updated:Oct 26, 2026

Creates a Cloud Enterprise Network (CEN) instance, which is a basic resource for managing an integrated network. A CEN instance manages a network that can span one or more regions. Before you connect network instances, you must call the CreateCen operation to create a CEN instance.

Operation description

The CreateCen operation is asynchronous. The system first returns a CEN instance ID, but the instance is not yet fully created because the creation task is still running in the background. You can call the DescribeCens operation to query the status of the CEN instance.

  • When the CEN instance is in the Creating state, it is being created. In this state, you can only perform query operations on the CEN instance.

  • When the CEN instance is in the Active state, it is created.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

cen:CreateCen

create

*CenInstance

acs:cen:*:{#accountId}:ceninstance/*

None None

Request parameters

Parameter

Type

Required

Description

Example

ClientToken

string

No

The client token that is used to ensure the idempotence of the request.

You can generate a parameter value on your client to ensure that the value is unique across different requests. The ClientToken parameter supports only ASCII characters.

Note

If you do not specify this parameter, the system automatically uses the RequestId of the API request as the ClientToken. The RequestId of each API request is unique.

02fb3da4-130e-11e9-8e44-001****

Name

string

No

The name of the CEN instance.

The name can be left empty or must be 1 to 128 characters in length. It cannot start with http:// or https://.

testname

Description

string

No

The description of the CEN instance.

The description can be left empty or must be 1 to 256 characters in length. It cannot start with http:// or https://.

testdesc

ProtectionLevel

string

No

Specifies the level of CIDR block overlap.

Valid values:

  • REDUCED (default): CIDR blocks can overlap but cannot be identical.

REDUCED

Tag

array<object>

No

The tag information.

You can specify up to 20 tags at a time.

object

No

Key

string

No

The tag key of the resource.

The tag key cannot be an empty string. It can be up to 64 characters in length, and cannot start with aliyun or acs:. It cannot contain http:// or https://.

You can specify up to 20 tag keys at a time.

tagtest

Value

string

No

The tag value of the resource.

The tag value cannot be empty. It can be up to 128 characters in length, and cannot start with aliyun or acs:. It cannot contain http:// or https://.

Each tag key corresponds to a tag value. You can specify up to 20 tag values at a time.

tagtest

Response elements

Element

Type

Description

Example

object

The response.

CenId

string

The ID of the CEN instance.

cen-dc4vwznpwbobrl****

RequestId

string

The ID of the request.

0C2EE7A8-74D4-4081-8236-CEBDE3BBCF50

Examples

Success response

JSON format

{
  "CenId": "cen-dc4vwznpwbobrl****",
  "RequestId": "0C2EE7A8-74D4-4081-8236-CEBDE3BBCF50"
}

Error codes

HTTP status code

Error code

Error message

Description

400 IllegalParam.ResourceGroupId ResourceGroupId is illegal. The error message returned because the specified resource group is invalid.
400 InvalidTagValue The tag values are not valid. The error message returned because the specified tag value is invalid.
400 InvalidParameter Invalid parameter. The error message returned because the parameter is set to an invalid value.
400 Unauthorized The AccessKeyId is unauthorized. The error message returned because you do not have the permissions to perform this operation.
400 InvalidParameter.TagValue The specified parameter TagValue is invalid. The input parameter Tag Value is invalid.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.