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Cloud Enterprise Network:CreateCenChildInstanceRouteEntryToAttachment

Last Updated:Mar 25, 2024

Adds a route entry to a network instance and sets the next hop of the destination CIDR block to the transit router in the current region.

Operation description

  • You can add routes only to virtual private clouds (VPCs) or virtual border routers (VBRs) that are connected to an Enterprise Edition transit router.

  • By default, the next hop of the routes is the transit router connection, which is the connection between the VBR and the Enterprise Edition transit router. You cannot modify the next hop.

  • CreateCenChildInstanceRouteEntryToAttachment is an asynchronous operation. After you send a request, the system returns a request ID and runs the task in the background. You can call the DescribeRouteEntryList operation to query the status of a route.

    • If a route is in the Pending state, the route is being created. You can query the route but cannot perform other operations.
    • If a route is in the Available state, the route is created.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer.

Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

  • Operation: the value that you can use in the Action element to specify the operation on a resource.
  • Access level: the access level of each operation. The levels are read, write, and list.
  • Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
    • The required resource types are displayed in bold characters.
    • If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
  • Condition Key: the condition key that is defined by the cloud service.
  • Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.
OperationAccess levelResource typeCondition keyAssociated operation
  • CenInstance

Request parameters


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.

Note If you do not set this parameter, ClientToken is set to the value of RequestId. The value of RequestId for each API request may be different.

Specifies whether to perform a dry run to check information such as the permissions and the instance status. Valid values:

  • false: performs a dry run and sends the request.
  • true: performs a dry run. The system checks the required parameters and request syntax. 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.
Note This parameter is not in use.

The CEN instance ID.


The ID of the network instance connection.


The ID of the route table configured on the network instance.


The destination CIDR block of the route.

Response parameters


The response.


The ID of the request.



Sample success responses


  "RequestId": "A95A100B-3F3A-56F4-A5DE-19DB7E994807"

Error codes

HTTP status codeError codeError messageDescription
400Forbidden.VpcAsInternetGatewayIt’s forbidden that using Vpc as internet gateway for your private IDC.-
400InvalidCIDRBlock.DuplicateSpecified CIDR block is already exists.The error message returned because the specified CIDR block already exists.
400InvalidCidrBlock.MalformedSpecified CIDR block is not valid.The error message returned because the specified CIDR block is invalid.
400OperationFailed.RouteConflictRoute conflict exists in routing table.The error message returned because two or more routes in the route table conflict with each other.
400InvalidOperation.UnsupportnexthopTypeThe specified next hop type is not supported by this operation.The specified next hop type is not supported by this operation.
400IncorrectStatus.VpcRouteEntryThe resource is not in a valid state for the attachment operation.The error message returned because the status of the VPC route entry does not support this operation. Try again later.
400OperationDenied.RouteTableTypeNotPermittedThe operation is not allowed because of RouteTableTypeNotPermitted.The error message returned because this operation is not supported by the specified type of route table.
400InvalidParameterInvalid parameter.The error message returned because the parameter is set to an invalid value.
400UnauthorizedThe AccessKeyId is unauthorized.The error message returned because you do not have the permissions to perform this operation.
404InvalidAttachmentId.NotFoundThe specified AttachmentId is not found.The error message returned because the specified network instance connection ID does not exist.

For a list of error codes, visit the Service error codes.

Change history

Change timeSummary of changesOperation
2022-12-22The Error code has changedsee changesets
Change itemChange content
Error CodesThe Error code has changed.
    Error Codes 400 change
    delete Error Codes: 404
2021-10-23Add Operationsee changesets