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Cloud Enterprise Network:DeleteTransitRouterCidr

Last Updated:Aug 12, 2026

Deletes a CIDR block from a transit router.

Operation description

A transit router CIDR block that has allocated IP addresses cannot be deleted.

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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

cen:DeleteTransitRouterCidr

delete

*TransitRouter

acs:cen:*:{#accountId}:centransitrouter/{#centransitrouterId}

None None

Request parameters

Parameter

Type

Required

Description

Example

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 client token can contain only ASCII characters.

Note

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

123e4567-e89b-12d3-a456-426****

TransitRouterId

string

Yes

The ID of the transit router instance.

tr-p0w3x8c9em72a40nw****

TransitRouterCidrId

string

Yes

The ID of the transit router CIDR block.

You can call the ListTransitRouterCidr operation to query the ID of the transit router CIDR block.

cidr-0zv0q9crqpntzz****

RegionId

string

Yes

The ID of the region where the transit router instance is deployed.

You can call the DescribeChildInstanceRegions operation to query the region ID.

cn-hangzhou

DryRun

boolean

No

Specifies whether to perform a dry run. Valid values:

  • true: performs a dry run. The system checks the required parameters, request syntax, and business restrictions. If the request fails the dry run, an error message is returned. If the request passes the dry run, the error code DryRunOperation is returned.

  • false (default): performs a dry run and sends the request. If the request passes the dry run, the transit router CIDR block is deleted.

false

Response elements

Element

Type

Description

Example

object

The response parameters.

RequestId

string

The request ID.

0876E54E-3E36-5C31-89F0-9EE8A9266F9A

Examples

Success response

JSON format

{
  "RequestId": "0876E54E-3E36-5C31-89F0-9EE8A9266F9A"
}

Error codes

HTTP status code

Error code

Error message

Description

400 OperationFailed.CidrBlockAllocated Cidr blocks are allocated from the cidr, which should be released first. The error message returned because the specified CIDR block is already occupied. Release the resources that occupy the CIDR block and try again.
400 OperationFailed.CidrNotExist cidr is not exist. The error message returned because the specified CIDR block does not exist.
400 InvalidParameter Invalid parameter. The error message returned because the parameter is set to an invalid value.
400 Unauthorized The AccessKeyId is unauthorized. The error message returned because you do not have the permissions to perform this operation.
400 InvalidParameter.TransitRouterCidrId The specified parameter TransitRouterCidrId is invalid. The parameter TransitRouterCidrId entered is illegal.
400 InvalidParameter.TransitRouterId The specified parameter TransitRouterId is invalid. The parameter TransitRouterId entered is illegal.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.