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Express Connect:API overview

Last Updated:Aug 07, 2025

API standard and pre-built SDKs in multi-language

The OpenAPI specification of this product (ExpressConnectRouter/2023-09-01) follows the RPC standard. Alibaba Cloud provides pre-built SDKs for popular programming languages to abstract low-level complexities such as request signing. This enables developers to call APIs using language-specific syntax without dealing with HTTP details directly.

Custom signature

If your specific needs, such as a customized signature, are not supported by the SDK, manually sign requests using the signature mechanism. Note that manual signing requires significant effort (usually about 5 business days). For support, join our DingTalk group (ID: 78410016550).

Before you begin

An Alibaba Cloud account has full administrative privileges. A compromised AccessKey pair exposes all associated resources to unauthorized access, posing a significant security risk. Create a Resource Access Management (RAM) user with API-only access and use RAM policies to apply the principle of least privilege (PoLP). Alibaba Cloud accounts are only used when explicitly required.

To call APIs securely, configure the following:

Geography

API

Title

Description

DescribeExpressConnectRouterRegion DescribeExpressConnectRouterRegion Queries a list of regions in which resources related to an Express Connect router (ECR) are deployed.
ListExpressConnectRouterSupportedRegion ListExpressConnectRouterSupportedRegion Queries a list of regions in which the Express Connect router (ECR) feature is activated.
SynchronizeExpressConnectRouterInterRegionBandwidth SynchronizeExpressConnectRouterInterRegionBandwidth Synchronizes the forwarding bandwidth limit between regions for an Express Connect router (ECR).
CheckAddRegionToExpressConnectRouter CheckAddRegionToExpressConnectRouter Checks the Cloud Data Transfer (CDT) service required to add a region to an Express Connect router (ECR).

sub-instance management

API

Title

Description

ModifyExpressConnectRouterChildInstance ModifyExpressConnectRouterChildInstance Modifies the properties of a child instance (VBR) associated with an Express Connect Router (ECR).
ModifyExpressConnectRouterAssociation ModifyExpressConnectRouterAssociation Modifies the properties of a child instance associated with an Express Connect Router (ECR).
AttachExpressConnectRouterChildInstance AttachExpressConnectRouterChildInstance Attaches a child instance (VBR) to an Express Connect Router (ECR).
DetachExpressConnectRouterChildInstance DetachExpressConnectRouterChildInstance Disassociates a virtual border router (VBR) from an Express Connect router (ECR).
DescribeExpressConnectRouterChildInstance DescribeExpressConnectRouterChildInstance Queries the virtual border routers (VBRs) that are associated with an Express Connect router (ECR).
DescribeInstanceGrantedToExpressConnectRouter DescribeInstanceGrantedToExpressConnectRouter Queries the network instances whose permissions are granted to an Express Connect router (ECR).
RevokeInstanceFromExpressConnectRouter RevokeInstanceFromExpressConnectRouter Revokes permissions on a virtual private cloud (VPC) or a virtual border router (VBR) from an Express Connect router (ECR) owned by another account.
GrantInstanceToExpressConnectRouter GrantInstanceToExpressConnectRouter Grants permissions on a virtual private cloud (VPC) or a virtual border router (VBR) to an Express Connect router (ECR) of another account.

resource association relationship

API

Title

Description

CreateExpressConnectRouterAssociation CreateExpressConnectRouterAssociation Associates an Express Connect Router (ECR) with a Virtual Private Cloud (VPC) or a transit router (TR).
DeleteExpressConnectRouterAssociation DeleteExpressConnectRouterAssociation Disassociates an Express Connect router (ECR) from a virtual private cloud (VPC) or a transit router (TR).
DescribeExpressConnectRouterAssociation DescribeExpressConnectRouterAssociation Queries the virtual private clouds (VPCs) and transit routers (TRs) associated with an Express Connect router (ECR).

Leased line gateway routing entry

API

Title

Description

DisableExpressConnectRouterRouteEntries DisableExpressConnectRouterRouteEntries Disables route entries of an Express Connect router (ECR).
EnableExpressConnectRouterRouteEntries EnableExpressConnectRouterRouteEntries Enables route entries of an Express Connect router (ECR).
DescribeDisabledExpressConnectRouterRouteEntries DescribeDisabledExpressConnectRouterRouteEntries Queries the route entries that are disabled on an Express Connect router (ECR).
DescribeExpressConnectRouterRouteEntries DescribeExpressConnectRouterRouteEntries Queries the route entries of an Express Connect router (ECR).

Tags and resource groups

API

Title

Description

MoveResourceGroup MoveResourceGroup Modifies the resource group to which an Express Connect router (ECR) belongs.
ListTagResources ListTagResources Queries a list of tags that are added to an Express Connect router (ECR).
UntagResources UntagResources Removes tags from an Express Connect router (ECR).

leased line gateway (ECR)

API

Title

Description

CreateExpressConnectRouter CreateExpressConnectRouter Creates an Express Connect Router (ECR).
DeleteExpressConnectRouter DeleteExpressConnectRouter Deletes an Express Connect router (ECR).
ModifyExpressConnectRouterInterRegionTransitMode ModifyExpressConnectRouterInterRegionTransitMode Modifies the cross-region forwarding mode of an Express Connect router (ECR).
ModifyExpressConnectRouterAssociationAllowedPrefix ModifyExpressConnectRouterAssociationAllowedPrefix Modifies the route prefixes of a virtual private cloud (VPC) or a transit router (TR) that is associated with an Express Connect router (ECR).
ModifyExpressConnectRouter ModifyExpressConnectRouter Modifies the properties such as the name of an Express Connect router (ECR).
DescribeExpressConnectRouterInterRegionTransitMode DescribeExpressConnectRouterInterRegionTransitMode Queries the cross-region forwarding modes of an Express Connect router (ECR).
DescribeExpressConnectRouterAllowedPrefixHistory DescribeExpressConnectRouterAllowedPrefixHistory Queries the historical route prefixes of an Express Connect router (ECR).
DescribeExpressConnectRouter DescribeExpressConnectRouter Queries a list of Express Connect routers (ECRs).
ForceDeleteExpressConnectRouter ForceDeleteExpressConnectRouter Deletes an Express Connect router (ECR) and disassociates the virtual private cloud (VPC), transit router (TR), and virtual border router (VBR) associated with the ECR.

Flow Log

API

Title

Description

CreateFlowLog CreateFlowLog Creates a flow log and enables log delivery by default.
DeleteFlowlog DeleteFlowlog Deletes a flow log.
ModifyFlowLogAttribute ModifyFlowLogAttribute Modifies the name, description, sampling rate, and sampling interval.
DescribeFlowLogs DescribeFlowLogs Queries flow logs.
DeactivateFlowLog DeactivateFlowLog Disables log delivery.
ActivateFlowLog ActivateFlowLog Enables log delivery for flow logs.
TagResources TagResources Adds tags to an Express Connect router (ECR). You can add tags to only one ECR each time you call this operation. You can add multiple tags at a time.