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Cloud Enterprise Network:DetachCenChildInstance

Last Updated:Aug 12, 2026

Detaches a network instance from a Cloud Enterprise Network (CEN) instance.

Operation description

The DetachCenChildInstance operation supports detaching only network instances from a Basic Edition transit router.

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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:DetachCenChildInstance

update

*CenInstance

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

*virtualborderrouter

acs:vpc:*:{#accountId}:virtualborderrouter/{#virtualborderrouterId}

*VPC

acs:vpc:*:{#accountId}:vpc/{#vpcId}

None None

Request parameters

Parameter

Type

Required

Description

Example

CenId

string

Yes

The ID of the CEN instance.

cen-7qthudw0ll6jmx****

ChildInstanceId

string

Yes

The instance ID of the network instance to uninstall.

vpc-bp18sth14qii3pnvx****

ChildInstanceType

string

Yes

The type of the network instance. Valid values:

  • VPC: virtual private cloud.

  • VBR: virtual border router.

  • CCN: Cloud Connect Network.

VPC

ChildInstanceRegionId

string

Yes

The region ID of the network instance.

You can call the DescribeRegions operation to query the region ID.

cn-hangzhou

ChildInstanceOwnerId

integer

No

The ID of the Alibaba Cloud account that owns the network instance.

1699000000000000

CenOwnerId

integer

No

The ID of the Alibaba Cloud account that owns the CEN instance.

1688000000000000

Response elements

Element

Type

Description

Example

object

RequestId

string

The request ID.

0C2EE7A8-74D4-4081-8236-CEBDE3BBCF50

Examples

Success response

JSON format

{
  "RequestId": "0C2EE7A8-74D4-4081-8236-CEBDE3BBCF50"
}

Error codes

HTTP status code

Error code

Error message

Description

400 OperationFailed.AttachmentReferencedVpcRouteEntryExisted Operation is failed because there is at least one route entry which next hop is the specified attachment. The error message returned because this operation is not supported when a route points to an attachment.
400 Forbidden.OptimizationCCNExisted Operation Forbidden. CCN with optimization is on, please turn it off firstly.
400 Forbidden.PrivatezoneRouteExisted Operation Forbidden. There is a Privatezone Route associated with the instance, please dessociate it firstly. The error message returned because the PrivateZone route already exists. Delete the route and relevant configurations and try again.
400 Forbidden.TypeInvalid The specified ChildInstanceType or TransitRouterType is not supported by this operation. The error message returned because the ChildInstanceType or TransitRouterType parameter does not support this operation.
400 IncorrectStatus.Vpc The resource is not in a valid state for the operation. The error message returned because the status of the VPC does not support this operation. Try again later.
400 OperationFailed.VbrAttachedVbrHa The operation is failed because of VbrAttachedVbrHa.
400 OperationFailed.RIInstanceExist Operation is failed because RI exists. The error message returned because this operation is not supported when an RI instance exists.
400 IncorrectStatus.VpcRouteTable The VPC route table is not in a desired state. The error message returned because the VPC route table is in an unstable state. Try again later.
400 OperationFailed.CenReferencedVpcRouteEntryExisted Operation is failed because there is at least one route entry which next hop is the specified cen. The operation is not supported because routes pointing to CEN exist.
400 InvalidOperation.BondVbrAssociated Illegal operation due to associated BondVBR. Illegal operation due to associated BondVBR.
400 OperationFailed.VbrWithAllowPrefixes Operation failed because allow prefixes referenced by vbr exists. A route prefix on the VBR is assigned the Allow action, which causes the operation to fail.
400 InvalidOperation.CustomRegionDomainRouteEntryExist Operation is invalid because custom region-domain route entry exist. Operation is invalid because custom region-domain route entry exist.
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 OperationNotPermitted.AttachmentManagedByCloudService The specified Attachment managed by cloud service can only be deleted through cloud service.
400 InvalidStatus.ResourceStatus The resource is not in a valid state for the attachment operation. The error message returned because the status of the specified resource does not support this operation. Try again later.
400 InvalidParameter.CenId The specified parameter CenId is invalid.
404 Bid.NotFound Not found Bid by specified AliUid. The error message returned because the BID does not exist.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.