Help Center/ Enterprise Router/ Best Practices/ Connecting Multiple On-Premises Networks Across Regions Through Enterprise Routers/ Overview
Updated on 2025-04-10 GMT+08:00
View PDF
Share

Overview

Scenarios

Direct Connect establishes a dedicated, secure, stable, and high-speed network connection between your on-premises data center and VPCs. You can attach Direct Connect global DC gateways to enterprise routers to build a large-scale hybrid cloud network globally.

Relying on the Huawei Cloud backbone network, Cloud Connect allows you to build a central network to easily and securely create and manage your global network resources on premises and on the cloud. You can add enterprise routers in two or more regions to a central network to form peering connections, so that resources attached to these enterprise routers can communicate with each other across regions.

The following describes how to use Enterprise Router, Direct Connect, and Cloud Connect central networks to connect on-premises networks in different regions.

Architecture

An enterprise deployed services in the on-premises data centers in region A and region B. To quickly connect the two on-premises networks in different regions, you need to:
  1. Create enterprise router ER-A in region A and enterprise router ER-B in region B.
  2. Create a Cloud Connect central network and add the two enterprise routers (ER-A and ER-B) from different regions to this network.
  3. In region A, connect IDC-A to ER-A through Direct Connect (global DC gateway). In region B, connect IDC-B to ER-B through Direct Connect (global DC gateway).

After the preceding steps are complete, the on-premises networks from different regions can communicate with each other.

Figure 1 Communications between on-premises networks from different regions

Advantages

You can use Cloud Connect central networks and enterprise routers to flexibly build a global network for communications.

Constraints

The CIDR blocks of the VPCs and of the on-premises data centers cannot overlap.