Process Overview
To enable on-premises data centers to communicate with multiple VPCs across regions, connect each data center to one VPC using Direct Connect. Then create a cloud connection and load the VPCs and the virtual gateways used by Direct Connect to the cloud connection. If you require VPCs of other users, ask them to authorize their VPCs to you before you load the them. Finally, purchase bandwidth packages and assign bandwidth between VPCs in different regions so that they can communicate with each other. If a VPC or on-premises data center is outside the Chinese mainland, you need to apply for a cross-border permit before you purchase bandwidth packages.
Figure 1 shows an example.
Figure 2 illustrates how you can enable network communications between data centers and VPCs across regions.
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