鉴于原有以太网的解决方案和设备还不能完全满足接入网这样一个公用网络环境的要求,为了保证业务的QoS(服务质量),需要研究适应公用网络环境的以太网设备和技术,这就是新一代的以太接入网,它的网络结构图如图1所示。 新一代的以太接入网由局侧设备和用户侧设备组成。局测设备一般位于小区内,用户侧设备一般位于居 In view of the fact that the original solution and equipment of Ethernet can not fully meet the requirements of a public network environment such as access network, in order to guarantee the QoS (service quality) of service, it is necessary to study Ethernet equipment and technology adapted to public network environment, which is A new generation of Ethernet access network, its network structure shown in Figure 1. A new generation of Ethernet access network by the office equipment and user-side equipment. Bureau test equipment is generally located in the district, the user-side equipment generally located in Habitat