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    ENS:AssociateEnsEipAddress

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    ENS:AssociateEnsEipAddress

    Last Updated:Mar 27, 2026

    Associates an elastic IP address (EIP) with a cloud resource that is deployed in the same region.

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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

    ens:AssociateEnsEipAddress

    update

    *All Resource

    *

    		 None None

    Request parameters

    Parameter

    Type

    Required

    Description

    Example
    AllocationId

    string

    Yes

    The ID of the EIP that you want to associate.

    eip-5sc1sgcrsrwgwdvx44hru****
    InstanceId

    string

    Yes

    The ID of the cloud service with which the EIP is associated.

    Note

    You can specify the ID of an Edge Load Balancer (ELB) instance ID.

    lb-5saivuir6b1mupxjfbhmk****
    InstanceType

    string

    No

    The type of instance with which you want to associate the EIP. Valid values:

    • Nat: NAT gateway.

    • SlbInstance: Edge Load Balancer (ELB) instance.

    • NetworkInterface: secondary elastic network interface (ENI).

    • NatSlbInstance: If you want to associate multiple EIPs with an ELB instance, you need to set the parameter to this value.

    • EnsInstance (default): ENS instance.

    SlbInstance
    Standby

    boolean

    No

    Specifies whether the EIP is a secondary EIP. Valid values:

    • true

    • false

    true

    Response elements

    Element

    Type

    Description

    Example

    object

    Schema of Response

    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
    400 RegionAccessDenied Could not operate this region's resource
    400 InstanceNotFound The input parameter instancdId that is not found.
    400 ens.interface.error An error occurred while call the API.
    400 Invalid%s The specified parameter %s is invalid.
    400 Missing%s You must specify the parameter %s.
    400 IncorrectEipStatus The current status of the resource does not support this operation. The Eip status is incorrect. Check the Eip status.
    400 InvalidAssociation.Duplicated Specified instance already is associated.
    400 LoadBalancerNotFound The input parameter allocationId that is not found.
    400 EipNotFound The input parameter allocationId that is not found.
    400 IncorrectInstanceStatus Current instance status does not support this operation.
    400 InvalidAssociation.AssociateEipFist Associate EIP first.
    400 InvalidAssociation.RegionNotSupportStandby The region of EIP does not support standby.
    400 NatNotFound The input parameter allocationId that is not found.
    400 InvalidAssociation.NetworkTypeNotSupport The instance network type does not support binding to EIP.
    400 EniNotFound The input parameter allocationId that is not found.
    400 IncorrectEniStatus Current instance status does not support this operation.
    400 InvalidParameter.EniServiceManaged The eni is managed by service.
    400 InvalidAssociation.EniNotSupportStandby Eni does not support standby eip.
    400 IncorrectEniType The type of eni is invalid.
    400 NoPermission Permission denied.
    400 InvalidParameter.%s The specified field %s invalid. Please check it again.

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.