Connecting Regions with Alibaba Cloud Enterprise Network

By Fouad Yousuf Dar, Aftersales Engineer II

For a distributed or hybrid network, the interconnectivity between different tenants is crucial. There are many ways to connect different parts of a network depending on your business needs. For a small hub and spoke type network, a Virtual Private Network (VPN) connection will suffice. But as your network grows geographically, you need to connect different tenants with a low-latency, high-speed network with a systematic and centralized network management platform. Above all, redundant connections to ensure the connectivity even in disastrous conditions is highly desirable.

Alibaba Cloud Enterprise Network (CEN) fulfils these requirements for both small and large enterprise network architectures. CEN helps to build a business system that is distributed in the hybrid cloud or over Alibaba Cloud across multiple geographic locations.

It is simple to use; you can bring up the connectivity between two tenants in only a few minutes. Furthermore, it provides free connectivity between different data centers located in the same region, making it perfect for distributed disaster recovery solutions. CEN features high availability and network redundancy. As stated in the official documentation, there are at least four redundant links between any two access points. If a link is interrupted, CEN can ensure service continuity without network jitter and interruption. It dynamically detects the links and chooses the shortest path. You can learn more about CEN features here.

This quick start guide will help you to quickly setup your desired solution. There are two scenarios covered in this tutorial; you can choose the one most suitable for your business needs.

A. Connecting two VPCs in the same Region but different zones.
B. Connecting two VPCs in different Regions.

Connecting Two VPCs in the Same Region


  1. Two isolated VPCs and two ECS instances provisioned. You should have a VPC and ECS instance pair in each zone.

Step 1: Create CEN instance

Under Create Instance:

  1. Enter the instance name. I have chosen “infinitycloudConnect” as the name.
  2. Select VPC under Network Types as we want to connect two Virtual Private Clouds.
  3. Select the region where your VPC is located.
  4. Select the VPC from the drop-down menu under Networks. Click OK.

You will see an operation complete window, which lists the details of your CEN instance.

Step 2: Add a network

That’s it! You have connected the two VPCs with the CEN instance. Yes, it is as simple as it gets.

Connecting Two VPCs in Different Regions

Step 1: Create CEN instance

Step 2: Add network

You have connected the two VPCs in different regions with the CEN instance.

Step 3: Buy a Bandwidth Package

  1. On the Instances page, click CEN Instance, and then click the Bandwidth Packages tab.
  2. Click Buy Bandwidth Package (Subscription).
  3. Configure the bandwidth package.

Step 4: Set the Cross-Region Bandwidth

The connectivity is complete.

Checking the Connectivity of Your Network

Check the network routes

Ping test

  1. Login on one of the ECS instances and ping the private IP address of the other instance. The ping results will confirm that the connectivity between the two instances has been achieved with Alibaba Cloud Enterprise Network (CEN).



Follow me to keep abreast with the latest technology news, industry insights, and developer trends. Alibaba Cloud website: