All Products
Search
Document Center

Anycast Elastic IP Address:AssociateAnycastEipAddress

Last Updated:Dec 06, 2025

Associates an Anycast EIP with a specified backend cloud resource.

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

eipanycast:AssociateAnycastEipAddress

create

*AnycastEipAddress

acs:eipanycast:{#regionId}:{#accountId}:anycast/{#anycastId}

LoadBalancer

acs:eipanycast:{#regionId}:{#accountId}:loadbalancer/{#LoadBalancerId}

Instance

acs:eipanycast:{#regionId}:{#accountId}:networkinterface/{#InstanceId}

None None

Request parameters

Parameter

Type

Required

Description

Example

BindInstanceId

string

Yes

The ID of the cloud resource with which you want to associate the Anycast EIP.

lb-d7oxbixhxv1uupnon****

BindInstanceRegionId

string

Yes

The ID of the region where the cloud resource is deployed.

You can associate Anycast EIPs with cloud resources in specific regions. You can call the operation to query the region IDs.

us-west-1

BindInstanceType

string

Yes

The type of the cloud resource with which you want to associate the Anycast EIP. Valid values:

  • SlbInstance: a Classic Load Balancer (CLB) instance in a virtual private cloud (VPC).

  • NetworkInterface: an elastic network interface (ENI).

SlbInstance

AnycastId

string

Yes

The ID of the Anycast EIP instance.

aeip-bp1ix34fralt4ykf3****

ClientToken

string

No

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

You can use the client to generate the token, but you must make sure that the token is unique among different requests. The token can contain only ASCII characters and cannot exceed 64 characters in length.

Note

If you do not specify this parameter, the system automatically uses the RequestId of the request as the ClientToken. The RequestId may be different for each request.

123e4567-e89b-12d3-a456-426655440000

DryRun

boolean

No

Specifies whether to perform a dry run, without performing the actual request. Valid values:

  • true: performs a dry run. The system checks the request for potential issues, including missing parameter values, incorrect request syntax, and service limits. If the request fails the dry run, an error message is returned. If the request passes the dry run, the DryRunOperation error code is returned.

  • false (default): performs a dry run and performs the actual request. If the request passes the dry run, a 2xx HTTP status code is returned and the operation is performed.

false

PopLocations

array<object>

No

The information about the access points in the access areas that are associated with the cloud resource.

If this is your first time to associate a cloud resource, you do not need to configure this parameter. The system automatically associates all access areas.

You can call the operation to query the information about the access points in the supported access areas.

object

No

The information about the access points in the access areas that are associated with the cloud resource.

If this is your first time to associate a cloud resource, you do not need to configure this parameter. The system automatically associates all access areas.

You can call the operation to query the information about the access points in the supported access areas.

PopLocation

string

No

The information about the access points in the access areas that are associated with the cloud resource.

If this is your first time to associate a cloud resource, you do not need to configure this parameter. The system automatically associates all access areas.

You can call the operation to query the information about the access points in the supported access areas.

us-west-1-pop

AssociationMode

string

No

The association mode. Valid values:

  • Default: the default mode. In this mode, the associated cloud resource is the default origin server.

  • Normal: the normal mode. In this mode, the associated cloud resource is a normal origin server.

Note

An Anycast EIP can be associated with cloud resources in multiple regions. However, you can specify only one default origin server and multiple normal origin servers. When you do not specify an access point or add a new access point, requests are forwarded to the default origin server by default.

  • If this is your first time to associate a cloud resource with the Anycast EIP, the association mode is Default by default.

  • If this is not your first time to associate a cloud resource with the Anycast EIP, you can set the association mode to Default. This makes the new cloud resource the default origin server, and the original default origin server becomes a normal origin server.

Default

PrivateIpAddress

string

No

The secondary private IP address of the ENI.

This parameter is required when BindInstanceType is set to NetworkInterface. If you do not specify this parameter, the primary private IP address of the ENI is used.

192.168.XX.XX

Response elements

Element

Type

Description

Example

object

The response.

RequestId

string

The request ID.

FBDB18D8-E91E-4978-8D6C-6E2E3EE10133

Examples

Success response

JSON format

{
  "RequestId": "FBDB18D8-E91E-4978-8D6C-6E2E3EE10133"
}

Error codes

HTTP status code

Error code

Error message

Description

400 InstanceNotExist.ENI Instance does not exist: The specified Elastic Network Interface (ENI) was not found. Please verify the instance ID or check if the resource has been released.
400 InstanceNotExist.SLB Instance does not exist: The specified Server Load Balancer (SLB) was not found. Please verify the instance ID or check if the resource has been released.
400 IncorrectStatus.Anycast The status of the Anycast instance is invalid.
400 OperationFailed.BindOnFreeNetworkInterface Operation failed because the specified network interface is not bound on instance. The operation failed because the specified ENI is not bound to the instance.
400 OperationFailed.Conflict Operation failed: The request was too frequent or there was a concurrency conflict. Please try again later.
400 OperationUnsupported.BACKEND_REGION_NOT_OPEN The specified Region is not supported. The specified region is not supported.
400 OperationUnsupported.ServiceManaged Operation is forbidden because this instance belongs to Service manager. The operation is prohibited and the instance belongs to a managed resource.
400 ResourceNotFound.BindInstanceId Resource not found: The specified BindInstanceId does not exist.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.