Network access controller (NAC)
Vitesse Semiconductor

The Vitesse family of Ethernet MACs enable system OEMs to focus on the value-added features of the packet processing function by simplifying the Ethernet system interface design. Vitesse MACs incorporate an industry-standard SPI-4.2 interface for connection to a wide variety of integrated circuits, such as packet processors, traffic managers, and switch fabrics.

Key Features
* High port density
* Jumbo frame support
* Extensive support for performance monitoring and billing with statistics based on RMON 1, IEEE 802.3, and SNMP
* Parallel and serial CPU interfaces for register access
* Advanced shaping and policing for each port
* Integrated serializer/deserializer (SerDes) for optical interfaces
* SPI-4.2 or XAUI host interfaces
* Advanced set of QoS features, using shared memory, supports oversubscription (VSC7344, VSC7346, and VSC7350)
* Multiprotocol support: Fibre Channel/FICON, ESCON/SBCON, or DVB-ASI (VSC7331)
* Single-device solution for both 1 GbE and 10 GbE (VSC7344 and VSC7346)