MSTP设备以太业务技术白皮书Version2.0目录缩略语清单LISTOFABBREVIATIONS.......................................61.概述..................................................................72.主要技术特点分析....................................................122.1业务处理..................................................122.1.1CAR（承诺接入速率）......................................................................................122.1.2LPT（链路状态穿通）......................................................................................142.1.3L2VPN.................................................................................................................152.1.3.1独特的用户域隔离................................................................................................152.1.3.2MPLS标签技术实现业务传送连接的三层隔离...............................................162.1.4流控......................................................................................................................172.2二层交换和汇聚功能........................................182.2.1VB（虚拟网桥）.................................................................................................182.2.2强大的汇聚能力.................................................................................................202.2.3生成树协议STP/RSTP.......................................................................................202.2.4组播协议IGMPSnooping.................................................................................212.2.4VlanSwitch功能...............................................................................................232.2.5链路聚合.................................................................................................................232.3环路封装..................................................242.3.1MPLS标签技术....................................................................................................242.3.2Stackablevlan标签技术..............................................................................242.4业务封装和映射............................................252.4.1封装协议..............................................................................................................252.4.2虚级联及映射.....................................................................................................252.4.3LCAS（链路容量调整方案）............................................................................263组网及应用...........................................................283.1以太专线业务EPL..........................................283.2以太虚拟专线业务EVPL.....................................303.3EPLn（即EPLAN）以太专用本地网...........................313.4EVPLn（即EVPLAN）以太虚拟专用本地网.....................324相关技术背景知识介绍.................................................354.1NP（网络处理器）..........................................354.2GFP（通用成帧规程）......................................364.3LCAS（链路容量调整方案）.................................394.4MPLS（多协议标记转换）...................................404.5STP（生成树协议）.........................................424.6IGMPSnooping（组播）....................................434.7CAR（承诺接入速率）......................................44图目录图1以太网端到端解决方案...
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