This topic describes how to enable ClassicLink. After you enable the ClassicLink function, you can connect classic-network ECS instances to the cloud resources (such as ECS instances, RDS instances, and SLB instances) in a VPC through the intranet.

Background information

The ECS instance in the VPC can access classic-network ECS instances connected to the VPC, but cannot access those not connected to the VPC or access other resources in the VPC. For more information, see ClassicLink overview.


  1. Log on to the VPC console.
  2. Select the region to which the target VPC belongs.
  3. On the VPCs page, find the target VPC, and then click Manage in the Actions column.
  4. On the VPC Details page, click Enable ClassicLink.
  5. In the Enable ClassicLink dialog box, click OK.
    After ClassicLink is enabled, the status of ClassicLink is changed to Enabled.
    Enable ClassicLink