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Direct Connect

Overview

What is Direct Connect

Introduction

Direct Connect (DC) is an exclusive, stable, secure, high-speed, and low-latency connection channel that links your on-premises data center to a Virtual Private Cloud (VPC). Compared to common cloud access methods, such as Virtual Private Networks (VPNs), Elastic IP Addresses (EIPs), and Internet NAT Gateways, DC offers high bandwidth, low latency, and enhanced privacy, supporting private network interconnection between the on-premises data centers and multiple VPCs.

Basic components

Component	Description
DC access point	An access point is the geographical location where a DC Connection connects to cloud services. VolcanoEngine access points support DC Connections from multiple line operators.
DC Connection	A DC Connection is a private physical link that connects your on-premises data center to a VolcanoEngine access point. Physically, it is implemented as a fiber optic cable.
DC Gateway	A DC Gateway is an access router that acts as the logical access gateway for a DC Connection to access a VPC. It requires no physical hardware on the cloud platform. When using DC, you can connect multiple DC Connections through one DC Gateway.
Virtual Interface	A Virtual Interface is a logical interface created on a DC Connection. It links the DC Connection to a DC Gateway, enabling your on-premises data center to communicate with multiple VPCs. Supports both static and BGP routing modes.

Benefits

High reliability: Supports multi-line disaster recovery across regions, and has capabilities of automatic fault detection and link auto-switching, with an SLA up to 99.95%, ensuring stable communication.

High security: The DC Connection is exclusively owned by the user and transmits data between the cloud and the on-premises through a private network, enhancing security and meeting the strict requirements of government, financial, and other industries.

Low latency: Achieve data transmission via a private network with fixed routing paths, resulting in low and stable transmission latency.

Strong scalability: Based on the Cloud Enterprise Network (CEN), you can associate multiple VPCs and multiple IDCs at any time with immediate effect, enabling flexible and scalable hybrid cloud deployment.

High bandwidth: A single DC connection supports bandwidth of up to 400 Gbps. You can add multiple connections to achieve higher overall bandwidth, thereby enhancing transmission performance.

Access method comparison

Comparison	Dedicated Line	Shared Line
Connection solution	A Dedicated Line offers an exclusive port from VolcanoEngine, establishing an exclusive, stable, secure, high-speed, and low-latency connection channel between your data center and a VPC.	A Shared Line directly uses a DC Connection of a line operator that is connected to the VolcanoEngine access point. The tenant only needs to connect the network between the data center and the line operator's DC access point. Share the DC Connection created by the line operator to use DC capabilities.
Port type	Exclusive port	Shared port
Overall construction scope	Requires you to contact a line operator to implement a physical link from your data center to the VolcanoEngine access point.	Only requires connecting the network between your data center and the DC access point of the line operator.
Overall construction period	2-3 months	Within 1 month
VolcanoEngine billing items	Port occupancy fee: Charged based on the port specification of the Dedicated Line. Outbound traffic fee: Charge based on the total traffic from the cloud egressing through the DC Gateway.	Port occupancy fee: Charged based on the port specification of the Shared Line. Paid by the Shared Line's actual user (tenant). Outbound traffic fee: Charged based on the total traffic from the cloud egressing through the DC Gateway. Paid by the Shared Line's actual user (tenant).
Recommended bandwidth	1 Gbps-400 Gbps	<1 Gbps

Access methods

Access methods	Description
Console access	You can log in to the Direct Connect Connection console to manage directly through the web page.
API access	You can use either HTTP or HTTPS to request online API calls or custom development. For details, see API reference.
SDK access	You can use the SDK to call APIs more conveniently for creating and managing resources. For details, see Direct Connect SDK overview.

Last updated: 2026.08.24 11:30:44