以太网MAC-MAC互连的分析及实现

介质独立接口(MⅡ)、吉比特介质独立接口(GMⅡ)和通用串行接口(GPSI)都是用来连接介质访问控制子层(MAC)和物理层(PHY)的常用接口，目的是将不同的物理介质用统一的接口连到MAC控制器。文中对三种接口的工作机制和信号时序关系进行了分析，给出了利用这些接口实现以太网MAC—MAC直接连接的实现方案，并通过具体系统对其中的两种连接方案进行了验证。     

基于FPGA的千兆以太网数据传输的设计与实现

为了解决大数据量长距离传输的稳定性和传输速率的问题,采用复杂可编程芯片FPGA设计出千兆以太网传输系统。为了简化设计,采用MAC+PHY方法实现以太网帧的封装及传输,MAC采用Virtex-4的嵌入式以太网IP核实现,PHY采用MARVELL公司的88E1111芯片实现,两芯片接口采用GMII连接模式。实验仿真结果表明,该传输系统能支持1 000 Mbit/s传输速率,该设计方案是可行的,有一定的实用价值。     

Beyond the LAN: Ethernet’s Evolution into the Public Network

This article details the evolution of Ethernet into Gigabit Ethernet and how this LAN-based technology has undergone major transformations over time. From its data rates and distances to supported media and functionality, Ethernet has greatly improved, enabling it to surmount many of its former limitations and in so doing to expand beyond the LAN into the MAN and now even the WAN. In this article, Pioneer Consulting explores the evolution further by focusing on some of the major technological directions in the Ethernet equipment industry.