Before associating an intranet domain name with a VPC, make sure that an intranet DNS record is already added for the domain name. For more information, see Creating a Resolution Record.

Note :

If you want an intranet domain name to take effect in a VPC, you need to not only associate it with the VPC but also modify the host DNS within the VPC to point to the intranet DNS server. For more information, see Modifying the Host DNS to Make the Intranet DNS Configuration Take Effect.

After associating an intranet domain name with a VPC, your intranet domain name is resolved based on the intranet DNS record on the ECS within the associated VPC, and its Internet DNS record is overwritten.

Note :

The Internet DNS record of the intranet domain name is not affected outside the VPC. By adding an intranet DNS record for an intranetdomain name, you can prevent exceptions due to an intranet domain name with an empty record overwriting the Internet DNS record to be used.

Assume that you have added an intranet domain name example.com and added an intranet DNS record for it. In this case, you can associate the intranet domain name with a VPC. After the VPC is associated, when an ECS within the VPC accesses a domain name under example.com, the intranet DNS record added for example.com is used, and the Internet DNS record of example.com is overwritten.

Procedure

Make sure that you have created an intranet domain name and logged in to the Intranet DNS console.
Find the intranet domain name you created, and click Associate VPCs in the Operation column.
Select the target VPC from the VPC drop-down list box to associate.

You can also deselect the target VPC from the VPC drop-down list box to disassociate.

When you associate an intranet domain name with VPCs or modify the associated VPCs, make sure that at least one VPC is selected.

After the configuration is complete, click OK .
You can view the VPC association information in the Associated VPCs column.