B.O.D.Y.: Beyond-Overlay Deterministic topologY -- A Layer-2 Declarative Ground Truth for AIOps Pipelines under Fragmented Administrative Boundaries

Abstract: Modern AIOps environments operating within multi-campus institutional infrastructures suffer acutely from topological drift and black-box unmanaged physical network segments. Classical layer-2 discovery pipelines rely on uniform administrative cooperation and ubiquitous SNMP polling, which routinely fail in heterogeneous, multi-vendor, and multi-tenant overlay infrastructures. This paper introduces B.O.D.Y. (Beyond-Overlay Deterministic topologY), a deterministic structural grounding layer for AIOps ecosystems operating under fragmented administrative boundaries. B.O.D.Y. bypasses the NP-hard incomplete Address Forwarding Table (AFT) resolution dilemma by formalizing a multi-modal data fusion pipeline that orchestrates ephemeral MAC address forwarding tables collected via non-privileged terminal sessions, passive OUI fingerprinting, PoE telemetry, and declarative state storage. The resulting topology graph reconstructs unmanaged physical segments and maps logical asset semantics without administrative network privileges, providing downstream reasoning systems with an immutable, auditable source of physical ground truth. Evaluation across five campuses of the Universidade Federal Fluminense, resolving 530 of 541 registered edge devices, demonstrates that deterministic topological grounding eliminates a critical failure mode in prob bilistic AIOps reasoning: confident causal inference decoupled from physical reality.