What is a VBR-to-VPC connection-Express Connect(Express Connect)-阿里云帮助中心

Important

VBR-to-VPC connection is discontinued. We recommend that you use Express Connect Router (ECR). ECR is a forwarding service component for global hybrid cloud networks that provides features such as global private network interconnection, fully dynamic route-based networking, and unified route advertisement and management.

A VBR-to-VPC connection enables private communication between a VPC and a VBR.

Initiator and accepter

The two ends of a VBR-to-VPC connection are the initiator and the accepter. The initiator establishes the connection, while the accepter waits for the request. These roles only control the connection setup process. After the connection is established, the communication link is bidirectional, and both ends function identically.

For a VBR-to-VPC connection, Express Connect automatically creates both the initiator and the accepter. You do not need to manually initiate the connection. The system automatically sends a request and establishes the connection.

The following table compares the initiator and the accepter.

Feature	Initiator	Accepter
Billing for intra-region connections	Free	Free
Billing for inter-region connections	Charged	Free
Requires peer configuration before connecting	Required	Required
Can initiate connections	Yes	No
Can send messages to the peer after connecting	Yes	Yes

Connection process and states

To establish a peering connection, the initiator sends a request that the accepter must accept.

The following table describes the peering connection states throughout the connection process.

Action	Initiator state	Accepter state
Initiator sends a connection request	Connecting	Accepting
Connection established	Activated	Activated
Suspend connection	Suspending	Suspending
Connection suspended	Suspended	Suspended
Reactivate connection	Activating	Activating
Connection reactivated	Activated	Activated

Billing

Billing method	Description	Supported actions	Expiration and overdue
Pay-as-you-go	You are charged daily for usage with this pay-as-you-go method. Bills for the previous day's usage are generated and settled daily at 00:00. Important Billing is not stopped for a suspended peering connection that uses the pay-as-you-go billing method. To stop billing, you must delete the peering connection.		The system checks if your account balance is sufficient to cover the fees for the next three billing cycles based on the average billable amount of the initiator instance in the last 24 hours. If your account balance is insufficient, you receive a notification via SMS or email. If you enable low balance alerts, you receive a notification via SMS or email when your account balance drops below the specified threshold. After your payment becomes overdue, the service for the initiator instance is not affected if the overdue amount is within the quota of your Grace Period for Overdue Payments. Note Alibaba Cloud provides the extended suspension-free benefit. When a pay-as-you-go resource is overdue, you can continue to use cloud services for a certain amount or duration. Normal fees apply during the extended period. For more information, see Extended Suspension-Free Benefit. If your overdue payment exceeds the Grace Period for Overdue Payments quota, the initiator instance is locked, and service and billing stop. If you clear the overdue payment within 7 days of the service suspension, the service is automatically re-enabled. If you do not clear the overdue payment within 7 days after the service is stopped, the instance is deleted. You receive a notification one day before the instance is deleted. After an instance is deleted, its configurations and data are permanently deleted. For more information about how to top up your account, see How to top up your account.

For VBR-to-VPC connections, only the initiator instance is billed; the accepter instance is not. Fees are determined by the bandwidth of the initiator instance and the distance of the connection.

Intra-region connections are free of charge.
For the pricing of inter-region connections, refer to the prices on the buy page. If you have any questions, contact your account manager.