Static Multicast Route and Just-in-Time Any Source Multicast: A Hybrid Framework for Enterprise Networks

Enterprise networks face state explosion from IoT-driven many-sender multicast and discovery protocol floods. Traditional PIM-SM maintains O(N×G×R) state entries, creating scaling challenges when N sources transmit to G groups across R routers. This paper introduces JIT-ASM, a hybrid framework combining selective PIM-BiDir deployment with controller-provisioned static routes while maintaining PIM-SM compatibility. Our key contributions include: (1) quantified SMBiDir boundary translation performance showing 2.8ms mean latency with 4.2ms 95th percentile and bounded CPU/memory overhead, (2) adaptive hysteresis-based classification mechanism reducing state oscillations by 89% through dual-threshold controls, and (3) comprehensive multi-failure resilience analysis under cascading failures, asymmetric partitions, and Byzantine conditions. Extensive validation across physical testbeds and large-scale simulation demonstrates 67% reduction in multicast state entries for discovery-heavy workloads, 45% faster convergence during RP failover, and graceful degradation under complex failure scenarios.