Moving IDCs to the Cloud with BGP Primary and Backup Links

Network Topology

As mentioned above, our goal is to use leased lines and Cloud Enterprise Network to move customers’ IDCs to the cloud through primary and backup links. We then connect the IDCs to the Virtual Private Cloud (VPC) in different regions on the cloud.

  1. VPC in Beijing:
  2. VPC in Shanghai:
  3. VPC in Hong Kong:

Solution Overview

To implement primary-backup link routing (the primary link is prioritized) from Alibaba Cloud to IDC, the following configuration is required:

1. BGP routing on the IDC

2. VBR BGP routing table

3. Full routing table

Configure Health Check

After a connection is established through the leased line, to monitor the link quality of the leased line, we recommend each user to configure health check on the leased line. Configuring health check is a necessary so that the traffic can be switched to the other link when one equivalent redundant leased line link is interrupted.

  1. Select CEN where VBR is located and the corresponding VBR.
  2. For the source IP address, enter an IP address that has not been used within any VPC in CEN.
  3. For the destination IP address, we recommend that you enter the IP address of the CPE interface that is interconnected with VBR.


We looked at how Cloud Enterprise Network (CEN) helps customers migrate IDCs to the cloud and implement a solution that features the primary-backup link mode.



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