The Cortina Systems® CS3477 4-port 10 Gigabit Linerate and internal memory oversubscription, or CS3487 external memory oversubscription Ethernet Aggregator is a 4-port 10 Gigabit line-rate or oversubscribed Ethernet aggregator for high-density switches and transport platforms. It provides industry-leading 10GE integration, with four on-board XFI serdes for direct connection to XFP optical modules. Optional cut-through operation minimizes latency for line-rate applications. With advanced classification through Layer 4, four queues per port, and strict priority and round robin scheduling options, the CS3477 delivers the strongest oversubscription feature set in the industry. It also supports per-VLAN policing, statistics, tagging, and classification to assist the delivery of MEF-compliant Carrier Ethernet services. On the host side, Cortina System, Inc.'s (Cortina) open Interlaken protocol achieves 25 Gbps of bandwidth across 2-8 serdes lanes for the industry's most cost-effective high-performance interconnect. There are two flavors available; the CS3477 supports line rate and internal memory oversubscription, which the CS3487 supports an external memory for oversubscription.