The image shows connectivity between an On-Premises Data Center and an OCI region qith a VCN, an availability domain with three subnets inside the intersection of the AD and VCN with IP address 10.40.0.0/16. The public subnet has the address 10.40.1.0/24 and contains a virtual machine. There are also two private subnets with address ranges 10.40.2.0/24 and 10.40.3.0/24.

The On-Premises Data Center includes private hosts and two customer premises equipment devices. These devices connect to the OCI region using two separate VPN connections established over the internet. Each VPN connection terminates at a different VPN headend in the OCI region, providing redundancy. Both VPN headends connect to a DRG in OCI. The DRG provides access to the VCN with IP address 10.40.0.0/16.