介绍了万兆以太网及其在宽带IP城域骨干网中的优势 ,同时从技术角度分析了其在宽带IP城域骨干网中应用的几个关键技术 ,包括物理层技术、帧格式、LAN与WAN的速率适配、 1 0GE构建宽带IP城域骨干网时的网络拓扑结构、QoS和路由策略 ,以及与其他如DPT、RPR、POS等IP骨干网技术的性能比较。万兆以太网技术为电信级运营商在建设宽带IP城域骨干网时提供了新的选择 This paper introduces the advantages of 10 Gigabit Ethernet and its advantages in broadband metropolitan area network backbone network. At the same time, it analyzes several key technologies applied in broadband metro IP backbone network from the technical point of view, including physical layer technology, frame format, LAN And WAN rate adaptation, the network topology, QoS and routing strategies of 10GE when building a broadband IP MAN backbone network, as well as the performance comparison with other IP backbone technologies such as DPT, RPR and POS. 10 Gigabit Ethernet Technology Provides Carrier-Class Operators New Options in Building Broadband IP Metro Backbone Networks