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Cloud Enterprise Network:DeleteTransitRouterPrefixListAssociation

Last Updated:Sep 02, 2026

Dissociates a prefix list from an Enterprise Edition transit router route table.

Operation description

Warning After a prefix list is dissociated from an Enterprise Edition transit router route table, the system automatically withdraws all route entries related to the prefix list from the Enterprise Edition transit router route table. Before dissociating the prefix list, make sure that redundant routes exist in the Enterprise Edition transit router route table. Otherwise, network interruptions may occur.

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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:DeleteTransitRouterPrefixListAssociation

delete

*All Resource

*

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 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-a456-4266****

RegionId

string

Yes

The region ID of the transit router instance.

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

cn-hangzhou

TransitRouterId

string

Yes

The ID of the transit routing instance.

tr-6ehx7q2jze8ch5ji0****

PrefixListId

string

Yes

The ID of the prefix list.

pl-6ehtn5kqxgeyy08fi****

TransitRouterTableId

string

Yes

The ID of the transit router route table.

vtb-6ehgc262hr170qgyc****

NextHop

string

Yes

The ID of the next hop connection.

If the CIDR blocks in the prefix list are blackhole routes, set this parameter to BlackHole.

tr-attach-flbq507rg2ckrj****

NextHopType

string

No

The next hop type. Valid values:

  • BlackHole: All CIDR blocks in the prefix list are blackhole routes. All traffic destined for the CIDR blocks in the prefix list is dropped.

  • VPC: The next hop of the CIDR blocks in the prefix list is a Virtual Private Cloud (VPC) connection.

  • VBR: The next hop of the CIDR blocks in the prefix list is a Virtual Border Router (VBR) connection.

  • TR: The next hop of the CIDR blocks in the prefix list is an inter-region connection.

  • ECR: The next hop of the CIDR blocks in the prefix list is an Express Connect Router (ECR) instance.

VPC

DryRun

boolean

No

Specifies whether to perform a dry run. Valid values:

  • true: performs a dry run without dissociating the prefix list. 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 DryRunOperation error code is returned.

  • false (default): performs a dry run and sends the request. If the request passes the dry run, the prefix list is dissociated.

Note

This parameter is not yet available.

false

Response elements

Element

Type

Description

Example

object

The response parameters.

RequestId

string

The request ID.

835E7F4B-B380-4E0F-96A5-6EA572388047

Examples

Success response

JSON format

{
  "RequestId": "835E7F4B-B380-4E0F-96A5-6EA572388047"
}

Error codes

HTTP status code

Error code

Error message

Description

400 NoPermission.AliyunServiceRolePolicyForCEN You are not authorized to create the service linked role. Role Name: AliyunServiceRolePolicyForCEN. Service Name: cen.aliyuncs.com. Make sure that the user has been granted the ram:CreateServiceLinkedRole permission. The error message returned because you do not have the permissions to create the service-linked role whose role name is AliyunServiceRolePolicyForCEN and service name is cen.aliyuncs.com. You must acquire the ram:CreateServiceLinkedRole permission before you can create the service-linked role.
400 ResourceNotFound.PrefixlistCidrs Can not find any cidr of specified prefix list. The error message returned because the specified prefix list does not contain a CIDR block.
400 ResourceNotFound.Nexthop The specified nexthop instance is not exsit. The error message returned because the specified next hop does not exist.
400 ResourceNotFound.PrefixlistAssociation The prefix list is not associated with this route table.
400 MultipleFound.PrefixlistAssociation multiple same prefix association record found. The error message returned because multiple configuration duplicates exist in the system.
400 InvalidStatus.PrefixlistAssociation The prefix list association is not in a valid state for the operation. The error message returned because the status of the specified prefix list does not support this operation. Try again later.
400 ResourceNotFound.PrefixList The specified prefixlist does not found. The error message returned because the specified prefix list does not exist.
400 OperationDenied.SystemPrefixList SystemPrefixList can not be operated. The error message returned because this operation is not supported by the system prefix list.
400 OperationFailed.OperateShareResource Operate share prefixlist failed. The error message returned because the specified prefix list failed to be shared.
400 InvalidStatus.Prefixlist Prefixlist is not in a operate status. The error message returned because the status of the specified prefix list does not support this operation.
400 IncorrectStatus.RouteTable RouteTable status is invalid. The error message returned because the operation is not supported when the specified route table is in an unstable state.
400 OperationFailed.TransitRouterNotExist Operation failed because transit router not exist. The error message returned because the specified transit router does not exist.
400 IncorrectStatus.TransitRouter TransitRouter status is invalid. The error message returned because the status of the transit router does not support this operation. Try again later.
400 IllegalParam.TransitRouterTableId The specified Route Table ID is invalid. The Route Table ID is invalid.
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.TransitRouterTableId The specified parameter TransitRouterTableId is invalid. The parameter TransitRouterTableId entered is illegal.
400 InvalidParameter.NextHop The specified parameter NextHop is invalid. The parameter NextHop entered is illegal.
400 InvalidParameter.TransitRouterId The specified parameter TransitRouterId is invalid. The parameter TransitRouterId entered is illegal.
404 InvalidRouteTableId.NotFound The specified RouteTableId is not found. The specified route table ID does not exist.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.