All Products
Search

This Product

    Elastic Compute Service:DetachClassicLinkVpc

    Document Center

    Elastic Compute Service:DetachClassicLinkVpc

    Last Updated:Jun 05, 2026

    Unlinks an Elastic Compute Service (ECS) instance that resides in the classic network from a virtual private cloud (VPC) by closing the ClassicLink connection between the instance and the VPC. After the instance is unlinked from the VPC, the instance can no longer communicate with instances in the VPC.

    Try it now

    Try this API in OpenAPI Explorer, no manual signing needed. Successful calls auto-generate SDK code matching your parameters. Download it with built-in credential security for local usage.

    Test

    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

    ecs:DetachClassicLinkVpc

    update

    *Instance

    acs:ecs:{#regionId}:{#accountId}:instance/{#instanceId}

    *VPC

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

    		 None None

    Request parameters

    Parameter

    Type

    Required

    Description

    Example
    RegionId

    string

    Yes

    The region ID of the instance. You can call the DescribeRegions operation to query the most recent region list.

    cn-hangzhou
    InstanceId

    string

    Yes

    The ID of the instance that resides in the classic network.

    i-bp67acfmxazb4p****
    VpcId

    string

    Yes

    The ID of the VPC to which the instance is connected.

    vpc-bp67acfmxazb4p****

    Response elements

    Element

    Type

    Description

    Example

    object

    RequestId

    string

    The request ID.

    473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E

    Examples

    Success response

    JSON format

    {
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E"
}

    Error codes

    HTTP status code

    Error code

    Error message

    Description
    403 InvalidInstanceId.NotFound The InstanceId provided does not exist in our records.
    403 InvalidRegionId.Malformed The specified parameter ?RegionId? is not valid.
    403 InvalidVpcId.Malformed The specified parameter ?VpcId? is not valid.
    403 InvalidInstanceId.MalFormed The specified instance is not a classic network instance.
    403 OperationDenied The instances are not allowed to detach from the linked vpc. The instance cannot be unlinked from the VPC.
    403 InvalidParameter.InvalidInstanceIdAndVpcId The parameter InstanceId and VpcId are not allowed to be empty at the same time. At least one of the InstanceId and VpcId parameters must be specified.
    403 InvalidStatus.InstanceStatus The specified instance status is not support this operation ,expect status is running or shutted. The instance is in a state that does not support the operation. The operation can be performed only when the instance is in the Running or Stopped state.
    403 Forbidden.SubUser User not authorized to operate on the specified resource. Your RAM user is not authorized to manage this resource.
    403 InvalidOperation.InvalidVpc The specified instance not link specify vpc.
    403 InvalidRegionId.NotFound The RegionId provided does not exist in our records.
    403 InvalidParameter.RegionIdAndInstanceId The specified instance does not exist.
    404 InvalidInstanceId.NotFound Specified instance does not exist. The specified instance does not exist. Check whether the instance ID is correct.

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.