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Express Connect:ConnectRouterInterface

Last Updated:Aug 24, 2026

Calls the ConnectRouterInterface operation to initiate a connection from the requester VPC router interface to the accepter.

Operation description

After you invoke this operation, the router interface enters the Connecting state and transitions to the Active state after the connection is established.

When you invoke this operation to create a VPC, note the following items:

  • Only a requester VPC router interface in the Idle state can initiate a connection to the accepter VPC.

  • A maximum of one pair of interconnected router interfaces can exist between any two routers.

  • If your account has a router interface with an overdue payment, you cannot initiate a connection.

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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

vpc:ConnectRouterInterface

update

*RouterInterface

acs:vpc:{#regionId}:{#accountId}:routerinterface/{#RouterInterfaceId}

None None

Request parameters

Parameter

Type

Required

Description

Example

RegionId

string

Yes

The region where the router interface is located.

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

cn-hangzhou

RouterInterfaceId

string

Yes

The ID of the requester VPC router interface.

ri-2zeo3xzyf38r4urzd****

Response elements

Element

Type

Description

Example

object

The request ID.

RequestId

string

The request ID.

DE77A7F3-3B74-41C0-A5BC-CAFD188C28B6

Examples

Success response

JSON format

{
  "RequestId": "DE77A7F3-3B74-41C0-A5BC-CAFD188C28B6"
}

Error codes

HTTP status code

Error code

Error message

Description

400 IncorrectRole.NotInitiatingSide The specified RouterInterface is not InitiatingSide.
400 IncorrectRIStatus RouterInterface can be operated by this action only when it's status is Idle. You can perform the operation only when the router interface is in the Idle state.
400 IncorrectOppositeInterfaceInfo.NotSet OppositeInterfaceId/OppositeRouterId/OppositeRouterType/OppositeInterfaceOwnerId must be all set. You must specify OppositeInterfaceId, OppositeRouterId, OppositeRouterType, and OppositeInterfaceOwnerId.
400 IncorrectOppositeInterfaceInfo Cannot connect on the same router
400 Forbidden.OnlyOneConnection The Specified routers have a connection already
400 Forbidden.BillsOutstanding You cannot use this action because you have bills outstanding.
400 InvalidAccount.NotFound The specified account is not exists.
400 ErrCode.Invalid got error
400 AttrMismatching.AcceptingSideRole %s
400 AttrMismatching.AcceptingSideInstanceId %s
400 AttrMismatching.AcceptingSideRegionNo %s
400 AttrMismatching.AcceptingSideRouterId %s
400 AttrMismatching.AcceptingSideRouterType %s
400 AttrMismatching.AcceptingSideAliUid %s
400 AttrMismatching.AcceptingSideOppositeInterfaceOwnerId %s
400 AttrMismatching.AcceptingSideOppositeRegionNo %s
400 AttrMismatching.AcceptingSideOppositeInterfaceId %s
400 AttrMismatching.AcceptingSideOppositeRouterId %s
400 AttrMismatching.AcceptingSideOppositeRouterType %s
400 IllegalParam.InstanceOwner The router instance owener error.
400 InvalidRegionId.NotFound The specified RegionId does not exist. The specified region does not exist.
404 InvalidRegionId.NotFound The RegionId provided does not exist in our records. The parameter is invalid.
404 InvalidRouterInterfaceId.NotFound The specified RouterInterfaceId does not exist in our record.
404 CROSS_BID.FORBIDDEN Connect RouterInterface across bid is illegal

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.