The following figure depicts the branch-to-branch connectivity across regions:

In the above diagram, “ncc-west2-pri” is the hub VPC that is associated to the Network Connectivity Center hub where two subnets are created. The subnet is associated to the “us-west2” region and the subnet is associated to the “us-east1” region. The “host1” is located on the West coast of the United States, while the “host2” is located on the East coast. You must connect “host1” to “host2” over Google’s network.

For instructions about how to configure branch-to-branch connectivity across regions, see: