This image shows an Oracle Cloud Infrastructure (OCI) region connected to a Microsoft Azure region that includes a hub and spoke topology. Data flow information is included in the surrounding text.

The OCI region contains a single virtual cloud network (VCN) and subnet with a route table and security list. The subnet includes database options such as Oracle Database, Oracle Autonomous Database, and Oracle Exadata Database Service.

The OCI region communicates with the Azure region by using Oracle Database Service for Microsoft Azure (ODSA) Multicloud Network Service which features Oracle Cloud Infrastructure FastConnect and Azure ExpressRoute.

The Azure region contains a hub virtual network (VNet) and 4 subnets:

• An external subnet with a public load balancer connects to the internal subnet through 2 FortiGate firewalls by using port 1 on the FortiGate virtual network interface cards (VNICs).
• An internal subnet with an internal load balancer connects to the external subnet through the 2 FortiGate firewalls by using port 2 on the FortiGate VNICs. The ODSA Multicloud Network Service also connects to port 2. A route table provides access the spoke VNet.
• A high availability (HA) subnet uses port 3 on the FortiGate VNICs.
• A management subnet uses port 4 on the FortiGate VNICs.

The Azure cloud also includes a spoke VNet with an application virtual machine (VM) running in a single subnet. A route table provides access to the internal subnet in the hub VNet.