FSW-724P-4SFP

Layer 2 Multicast Architecture

Layer 2 Optimization and Multicast Management

• IGMP Snooping (v1/v2/v3): Performs Deep Packet Inspection (DPI) of control messages to dynamically generate the Multicast Forwarding Table (MFT). It prevents intra-VLAN flooding by isolating streams exclusively to ports with an active Join Report, thereby preserving access bandwidth.

• IGMP Fast Leave: Enables immediate forwarding termination upon detection of a Leave message, bypassing standard query response intervals. This is critical for optimizing convergence times during channel switching (zapping) and preventing bandwidth spikes that cause jitter or pixel blocking on IPTV endpoints.

• MVR (Multicast VLAN Registration): Optimized for Multi-tenant/Hospitality scenarios. It allows sharing a single Multicast Source VLAN (e.g., from a 3DG-FLEX headend) across multiple Receiver VLANs, eliminating flow duplication in the backbone while maintaining unicast traffic isolation between users.

Access Control (ACL) and Security

• IGMP Filter: Granular per-port policies that restrict subscriptions to specific Multicast Group IPs. It ensures content security and protects the switch's Control Plane from saturation and DoS attacks based on IGMP flooding.

• Transparent Pass-through: A bypass mode for the IGMP protocol on specific VLANs or interfaces, allowing video traffic to transit as native broadcast within the Layer 2 domain.

• Hardware Protection & Storm Control: Architecture featuring hierarchical scheduling and Storm Control mechanisms for the automatic suppression of anomalous Broadcast, Multicast, and Unknown Unicast traffic. It supports privilege management via RBAC (Role-Based Access Control) for secure CLI access.

QoS Policies and Performance

• Bandwidth Control: Traffic management via CAR (Committed Access Rate) on a per-port or per-flow basis to deliver guaranteed bandwidth across the 8 PoE ports.

• Scheduling Algorithms: Advanced hardware queue management using SP (Strict Priority), WRR (Weighted Round Robin), or hybrid SP+WRR configurations for real-time traffic prioritization.