The Fast-Thru ™ all-hardware data-path and packet processing engine at the heart of EtherNID and MetroNID demarcation units provides full wire-speed traffic filtering based on sophisticated layer 1-4 packet selection rules – without adding jitter or latency to pass-through traffic. Filter by VLAN tag, service level, bandwidth class, as well as values or ranges of source and destination address and TCP/UDP ports.

Hardware-based traffic filtering directly at the service demarc edge – customer premises, cell sites, and carrier hand-off points – improves core network performance by blocking excess bandwidth use caused by spanning tree PDUs, undesirable applications and malicious traffic.