1. Log in Cloud DNS console, and go to intranet DNS service page.
2. Find out the private field of VPC to be associated, and click "Associated VPC" under its operation column.
3. In the associated VPC pop-up box, select and add the VPC to be associated from the private network list of corresponding region.

Note: If you need to disassociate VPC, you can select the corresponding VPC inversely in the associated VPC pop-up box. The same domain name or sub-domain name cannot associate with the same VPC.

4. After the completion of configuration, click "OK" to complete association.