OpenShift 4.20.13 on vSphere with network segmentation across control plane and compute VLANs, load-balanced API/Ingress endpoints, and DMZ-isolated auxiliary services. Traffic flows from Red Hat Registry through a firewall to an OCI-hosted internal registry, with DNS/DHCP/NTP services supporting three master nodes and three worker nodes orchestrated by vCenter. This architecture demonstrates enterprise-grade network isolation, high availability via load balancing, and secure image distribution for production Kubernetes workloads. Fork and customize this diagram to match your vSphere cluster topology, VLAN assignments, and registry endpoints. The bootstrap node pattern ensures repeatable, automated cluster initialization across your infrastructure.