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    Express Connect:DescribeExpressConnectRouterRegion

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    Express Connect:DescribeExpressConnectRouterRegion

    Last Updated:Aug 19, 2025

    Queries the regions that contain Express Connect Router (ECR) resources.

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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

    expressconnectrouter:DescribeExpressConnectRouterRegion

    list

    *ExpressConnectRouter

    acs:expressconnectrouter::{#accountId}:expressconnectrouter/{#EcrId}

    None

    None

    Request parameters

    Parameter

    Type

    Required

    Description

    Example

    EcrId

    string

    Yes

    The ID of ECR.

    ecr-fu8rszhgv7623c****

    DryRun

    boolean

    No

    Specifies whether to perform only a dry run. Valid values:

    • true: Sends a check request without modifying service resources.

    • false (default): Sends a normal request.

    false

    ClientToken

    string

    No

    A client token to ensure the idempotence of the request.

    Generate a unique parameter value from your client for each request. ClientToken supports only ASCII characters.

    Note

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

    02fb3da4-130e-11e9-8e44-00****

    Response parameters

    Parameter

    Type

    Description

    Example

    object

    RpcResponse

    RequestId

    string

    The request ID.

    6FABF516-FED3-5697-BDA2-B18C5D9A****

    Success

    boolean

    Indicates whether the call was successful. Valid values:

    • True: The call was successful.

    • False: The call failed.

    True

    Code

    string

    Indicates whether the call is successful. A value of 200 indicates that the call is successful. Other values indicate that the call failed. For more information, see Error codes.

    200

    Message

    string

    The returned message.

    OK

    HttpStatusCode

    integer

    The HTTP status code.

    200

    DynamicCode

    string

    The dynamic error code.

    IllegalParamFormat.EcrId

    DynamicMessage

    string

    The dynamic error message that is used to replace the %s placeholder in the ErrMessage parameter.

    Note

    If ErrMessage returns The Value of Input Parameter %s is not valid and DynamicMessage returns DtsJobId, it indicates that the value of the DtsJobId parameter is invalid.

    The param format of EcrId **** is illegal.

    AccessDeniedDetail

    string

    Details about the access denial.

    Authentication is failed for ****

    RegionIdList

    array

    The list of regions that contain sub-resources.

    string

    The region that contains sub-resources.

    [\"cn-shanghai\"]

    Examples

    Success response

    JSON format

    {
  "RequestId": "6FABF516-FED3-5697-BDA2-B18C5D9A****",
  "Success": true,
  "Code": "200",
  "Message": "OK",
  "HttpStatusCode": 200,
  "DynamicCode": "IllegalParamFormat.EcrId",
  "DynamicMessage": "The param format of EcrId **** is illegal.",
  "AccessDeniedDetail": "Authentication is failed for ****",
  "RegionIdList": [
    "[\\\"cn-shanghai\\\"]"
  ]
}

    Error codes

    HTTP status code

    Error code

    Error message

    Description

    400

    MissingParam.%s

    The param of %s is missing.

    The request parameters are not specified. Please check the corresponding parameters and try again.

    400

    IllegalParamFormat.%s

    The param format of %s is illegal.

    Illegal parameter format

    404

    ResourceNotFound.EcrId

    EcrId not found.

    ECR instance does not exist

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.