The evolutions of IEEE P802.3ba standard for 40G and 100G Ethernet was introduced, its speed se-lection and application target were analyzed, especially research on its protocol layer architecture defined and PMD specification, explicitly analyzed its physical layer multi lanes distribution(MLD) architecture and flexi-ble and scalable characters, finally assessed the standard's future prospect on mature commercial applications.%介绍了下一代以太网标准IEEE P802.3ba的研究进展、IEEE P802.3ba任务组关于速率的选择与应用目标的确定、协议结构和物理媒质相关特性.重点阐述其物理层的分层模型和工作原理,详细分析了协议的弹性和扩展性设计,并对标准的规模商用前景作了介绍.
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