OCI dual-region architecture with 12 VCNs connected via Dynamic Routing Gateways and Remote Peering Connections across us-ashburn-1 and us-phoenix-1. Six VCNs in Region 1 (10.1.0.0/16 through 10.6.0.0/16) attach to DRG-1, while six VCNs in Region 2 (10.11.0.0/16 through 10.16.0.0/16) attach to DRG-2, with all traffic routed through their respective DRGs. The two DRGs connect via Remote Peering Connection over the OCI backbone, enabling seamless inter-region communication and centralized routing policy enforcement. This hub-and-spoke pattern with remote peering provides high availability, simplified network management, and disaster recovery capabilities across geographically distributed regions. Fork and customize this diagram on Diagrams.so to match your own VCN CIDR blocks, add security rules, or extend to additional regions.