sse's GigaStream™ and TeraStream TM families of intelligent switch fabrics. The IQ2200 is positioned by Vitesse as a powerful platform for the delivery of flexible and scala- ble applications in the areas of complex multiprotocol routing, address translation, classification, pol- icy enforcement, filtering, traffic shaping and grooming, multicast, and SO on. Some of Vitesse components that allow a customized treatment of the QoS realm include RIO, RED, WRED, weighted round robin (WRR), and WFQ. Its scalable multiprotocol capabilities allow the easy deployment of added-value services such as MPLS, DiffServ, NAT, and IP Security (IPsec). To address the needs of either high-density-port line cards or examples centered on small fabric designs, Vitesse also offers a switch-interconnect chip called FOCUS Connect. This chip allows for the easy connection of up to eight NPUs of the company's IQ2x00 family, but ASICs, FPGAs, or other FOCUS-enabled peripherals can be connected as well. Each FOCUS16 port is a point-to-point, high-performance 1.6 Gbps full-duplex link that is structured as eight channels that are clocked at 100 MHz. This means that multiple packets can be transferred at the same time. The chip supports 1,024 separate multicast distribution trees, 4 priority levels for data packets, and flexible clock modes for the easy integration of FPGAs. It is scalable to larger port densities by using multilevel stacking or grouping. A single FOCUS Connect device can connect up to eight Vitesse IQ2000 NPUs with over 1 Gbps full-duplex bandwidth for each, or four IQ2000 NPUs with over 2 Gbps full-duplex bandwidth for each. The combination of two FOCUS Connect devices allows the rapid, glueless, and straightfor- ward connection between eight IQ2000 NPUs with over 2 Gbps bandwidth for each one. In the latest IQ2200 network-processor chip, Vitesse has integrated the FOCUS interface. In fact, it supports either FOCUS16 or FOCUS32 (32-bit-wide transfers) links for higher bandwidth. The company offers a series of advanced devel