目 录
摘 要 .......................................................................................................I
Abstract ..................................................................................................II
1 绪论......................................................................................................1
1.1 IP RAN 技术产生的背景 .........................................................1
1.2 IP RAN 技术的现状与发展趋势.............................................1
现状..............................................................................................1
发展趋势......................................................................................2
2 IP RAN 技术........................................................................................3
2.1 定义 ............................................................................................3
2.2 基本原理....................................................................................3
2.3 优势 ............................................................................................4
2.4 与其它技术的比较 ...................................................................5
与 TDM/SDH 比较....................................................................5
与 MSTP 比较 ............................................................................5
与 PTN 比较 ...............................................................................6
3 IP RAN 网络方案及建设原则...........................................................8
3.1 组网方案....................................................................................8
3.2 建设原则....................................................................................9
类路由器-B 类路由器组网 .......................................................9
类路由器-城域网组网.............................................................10
类路由器-B 类路由器组网.....................................................10
4 IP RAN 组网硬件.............................................................................11
4.1 核心层 ER 路由器..................................................................11
4.2 汇聚层 B 路由器 ....................................................................15
4.3 接入层 A 路由器 ....................................................................19
5 IP RAN 路由协议.............................................................................22
5.1 IS-IS 协议.................................................................................22
协议概述 ...................................................................................22
工作原理 ...................................................................................23
