Intel® 82576 Gigabit Ethernet Controller High-performance, Dual-Port Gigabit Network Connectivity for multi-core and virtualized platforms • High-performing, PCI Express* 10/100/1000 Ethernet connection • Dual-port, single-chip configuration simplifies designs • Improves performance and throughput by reducing the I/O overhead due to the software virtualization layer • Provides near-native performance and data protection with direct connectivity to the virtual machines • Enhanced support for passthrough traffic to board management controller The Intelligent Way to Connect The Intel® 82576 Gigabit Ethernet Controller is a compact component with two fully integrated Gigabit Ethernet Media Access Control (MAC) and physical layer (PHY) ports. This device uses the PCI Express* 2.0 (2.5 GT/s) [x4, x2, and x1] interface. The Intel 82576 Gigabit Ethernet Controller provides two IEEE 802.3* Ethernet interfaces for 1000BASE-T, 100BASE-TX, and 10BASE-T applications. Both ports also integrate a Serializer- Deserializer (SerDes) interface to support 1000BASE-SX/LX/BX (optical fiber), Gigabit Ethernet backplane applications and exter- nal PHYs connected either on board or via SFP connectors using SGMII signaling. Intel 82576 Gigabit Ethernet Controller provides hardware assists for auto sensing and switching between Copper and SerDes/SGMII interfaces. High-Performance Design Features The Intel 82576 Gigabit Ethernet Controller provides high- performance dual-port gigabit connectivity in a multi-core platform as well as in a virtualized platform. In a multi-core platform it supports different technologies including Intel® QuickData Technology, MSI-X, Low Latency Interrupts and others, that help accelerate the data across the platform thereby improving application response times. In a virtualized environment 1 it supports Intel® Virtualization Technology for Connectivity that helps improve the I/O performance by reducing the I/O overhead on a virtualized platform. The I/O technologies on a multi-core platform make use of the multiple queues and multiple interrupt vectors available on the Controller. These queues and interrupt vectors help in load balancing the data and the interrupts amongst themselves in order to lower CPU utilization and improve the overall system performance. Depending upon the latency sensitivity of the data, the Low Latency Interrupts feature automatically modu- lates the time interval between the interrupts, lowering CPU utilization levels. Intel Virtualization Technology for Connectivity is a suite of hardware assists provided on the I/O Controller that improves the overall system performance by lowering the I/O overhead on a virtualized environment. The technologies include Intel® I/O Accel- eration Technology (Intel® I/OAT), Virtual Machine Device Queues and PCI-SIG SR-IOV implementation. Intel I/OAT comprises different stateless offloads (checksum and TCP Segmentation offload), MSI-X and other features to enhance data acceleration across the virtualized platform. Virtual Machine Device Queues help improve data processing by offloading the data sorting functionality from the software virtualization layer to the I/O Controller. PCI-SIG SR-IOV implementation helps direct connectivity to the virtual machines in order to provide them with near-native performance. It also provides data isolation between the virtual machines. Intel 82576 Gigabit Ethernet Controller also provides security 1 features like IPsec offload and LinkSec.* IPsec offload significantly improves the system performance by delivering near-line-rate throughput with reduced CPU utilization. This performance gain is achieved by offloading the Read the full Product Brief Intel® 82576 Gigabit Ethernet Controller Network Connectivity.