BCM5720 Gigabit Ethernet: Energy Efficient Ethernet support, hardware support for IEEE 1588 timestamping, host to connection for better system manageability.
Designed for today's enterprise and data center environments, Broadcom's NetXtreme® 1G Ethernet controllers are the ideal solution for multi-core servers, delivering full line-rate throughput on all ports.
PCIe 2.1 1x Dual Port 1G LAN BCM5720 Ethernet Controller is a 13th generation 10/100/1000BASE-T and 10/100/1000BASE-X Ethernet LAN controller solution for high performance server and networking applications.
The host interface supports separate PCI Express functions for each LAN interface. The BCM5720 includes I/O Virtualization (IOV) functions such as 17 receive and 16 transmit queues, and 17 -X vectors with flexible vector-to-queue association.
These IOV capabilities enable the BCM5720 to support VMWare® NetQueue and Microsoft® VMQ technologies

Integrated dual 10/100/1000BASE-T and dual 1000BASE-X/SGMII 1.25 Gbaud SerDes transceivers.
Energy Efficient Ethernet™ (EEE) compliant with IEEE Std 802.3az 2010
Dual 10/100/1000BASE-T full/half duplex
Dual 1000BASE-X/SGMII Full/Half Duplex
Automatic Crossover
x2 PCI Express v2.0 at 5 GT/s or 2.5 GT/s
and -X capabilities - up to 17 -X vectors
I/O Virtualization (IOV) support for VMWare® NetQueue and Microsoft® VMQ
17 receive queues and 16 transmit queues
17 -X vectors support interrupt to host per queue
Flexible -X vector for send/receive queue association
TLP Processing (TPH) ECN Compliant with PCI Express Base Specification v2.0
Supports jumbo frames with payloads up to 9600 bytes
Virtual LAN (VLAN) support - IEEE 802.1q VLAN tagging
TCP, IP, UDP checksum offload
Large Send Offload (), TCP Segmentation Offload ()
Hardware-Assisted Implementation of IEEE 1588 and IEEE 802.1AS Time Synchroniza