You can cancel the ClassicLink connection between ECS instances when the connection is no longer needed.

Procedure

  1. Log on to the ECS console.
  2. In the left-side navigation pane, click Instances.
  3. Select the region to which the instance belongs, and then locate the target instance.
  4. Choose More > Network and Security Group > Disconnect from VPC.
  5. In the displayed dialog box, click OK.