This image shows an Oracle Cloud Infrastructure region that includes two availability domains. The region includes three virtual cloud networks (VCN) in a hub and spoke topology connected by local peering gateways (LPG). The VCNs are arranged here as functional layers.

• Hub VCN: The Hub VCN contains the FortiGate high-availability network across two virtual machines with one VM in each of the availability domains. FortiAnalyzer and FortiManager are also shown. The hub VCN includes the following gateways:

  • Internet gateway: Connects internet and external web clients to the hub VCN.
  • Dynamic routing gateway: Connects the customer data center and customer premises equipment to the hub VCN over IPSec VPN or FastConnect.
  • Service gateway: Connects the hub VCN to Object storage and a Yum repository for the region.
  • Local peering gateways: Connect the hub VCN to the application tier VCN and the database tier VCN.

• Application tier VCN: A FortiADC high-availability load balancer resides in each of the two availability domains. Each availability domain contains 2 fault domains, each with a virtual machine host. Each availability domain has a file service system connected by rsync. The application tier VCN is connected to the hub VCN over a local peering gateway.

• Database tier VCN: In each of the two availability domains there resides a database system host 1 and a database system host 2. The databases are connected across the availability domains by Oracle Active Data Guard. The database tier VCN is connected to the hub VCN over a local peering gateway.