FSW-848P-6SFP+

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). On this high-density architecture, it prevents intra-VLAN flooding by isolating streams exclusively to interfaces with an active Join Report, preserving access bandwidth and reducing computational overhead on client devices.

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

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

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 mechanisms for the automatic suppression of anomalous Broadcast, Multicast, and Unknown Unicast traffic. It supports multi-level defense against DoS attacks and RBAC (Role-Based Access Control) for secure CLI management.

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, essential for the simultaneous management of 48 PoE endpoints.

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