flowchart TB
  subgraph L0["Telecom management"]
    direction LR
    L0N0["Ericsson OSS-RC<br/>Legacy node inventory · phased retirement"]
    L0N1["Ericsson ENM<br/>RAN / Core / IMS · REST NBI · cmedit · AMOS"]
    L0N0 -->|"Phased node re-homing"| L0N1
    L0N2["FM / PM / CM mediation<br/>3GPP · SNMPv3 · VES collectors · Kafka"]
    L0N1 -->|"Northbound telemetry"| L0N2
  end
  subgraph L1["Virtualization &amp; container platform"]
    direction LR
    L1N0["VMware vSphere / vSAN<br/>SPBM · I/O baselines · VM dependencies"]
    L1N1["OpenShift Virtualization<br/>MTV · KubeVirt · ODF / supported CSI"]
    L1N0 -->|"Warm / cold migration; final cutover"| L1N1
    L1N2["Red Hat OpenShift<br/>restricted-v2 workloads · Multus / SR-IOV"]
    L1N1 -->|"Runs on the cluster"| L1N2
  end
  subgraph L2["Hybrid storage &amp; virtualization"]
    direction LR
    L2N0["On-premise routing<br/>IPAM · segmentation · BGP / BFD where supported"]
    L2N1["vSAN ESA &amp; OpenShift Virtualization<br/>Redundant paths · centralized firewall inspection"]
    L2N0 -->|"Hybrid interconnect"| L2N1
    L2N2["Hardened cluster foundation<br/>OpenShift OCP · restricted-v2 SCCs · ODF · Multi-tenant namespaces · FinOps"]
    L2N1 -->|"Routed workload access"| L2N2
  end
  L0N1 -.->|"ENM platform sizing follows the vendor-supported deployment model."| L1N2
  L0N2 -.->|"Approved telemetry destinations use the defined hybrid routing and security policy."| L2N2
  %% Southbound element mediation is validated per installed ENM and node software release. MTV warm migrations replicate active blocks in the background and execute final cutover inside a scheduled window with verified ESXi fallback.
  %% Reference topologies, not a statement of fit for your estate. Protocol versions, network boundaries, roles and service targets are set in the low-level design during the Assessment Sprint.