RSTP概要
目录
1. 协议简介(Overview) 1
1.1 开天辟地的第一代生成树协议：STP/RSTP 1
1.2 聪明伶俐的第二代生成树协议：PVST/PVST+ 5
1.3 多实例化的第三代生成树协议：MISTP/MSTP 7
1.4 生成树协议的未来之路 9
2. 基本概念(Definition) 9
2.1 端口角色(Port Role) 9
2.1.1 根端口(Root Port) 9
2.1.2 指定端口(Designated Port) 9
2.1.3 备份端口(Backup Port) 10
2.1.4 替换端口(Alternate Port) 10
2.2 端口状态(Port State) 10
2.2.1 丢弃(Discarding) 11
2.2.2 学习(Learning) 11
2.2.3 转发(Forwarding) 11
2.3 端口参数(Per-Port variables) 11
2.3.1 端口ID(Port Identifier) 11
2.3.2 边缘端口(Edge Port) 11
2.3.3 链路类型(Link Type) 11
2.3.4 端口链路代价(Port Path Cost) 12
2.4 网桥参数(Per-Bridge variables) 12
2.4.1 网桥ID(Bridge Identifier) 12
2.4.2 最大消息生存时间(maximum age) 12
2.4.3 转发延迟(Forward Delay) 12
2.4.4 保活时间(Hello Time) 12
2.5 状态机参数(State machine parameters) 13
2.5.1 老化时间(Ageing Time) 13
2.5.2 迁移时间(Migrate Time) 13
2.5.3 拓扑变化通知时间(TC While) 13
2.5.4 传输间隔(Transmit Hold Count) 13
2.5.5 协议版本(Force Protocol Version) 13
2.6 参数取值(Parameter Value) 14
2.6.1 性能参数(Performace Parameter) 14
2.6.2 端口链路代价(Port Path Cost) 14
2.7 消息封装(Encoding of BPDUs) 15
2.7.1 Encoding of Protocol Identifiers 16
2.7.2 Encoding of Protocol Version Identifiers 16
2.7.3 Encoding of BPDU Types 16
2.7.4 Encoding of Flags 16
2.7.5 Encoding of Bridge Identifiers 17
2.7.6 Encoding of Root Path Cost 17
2.7.7 Encoding of Port Identifiers 17
2.7.8 Encoding of Timer Values 17
2.7.9 Encoding of Length Values 17
2.7.10 Validation of Received BPDUs 17
3. 状态机(State Machine) 18
3.1 overview and interrelationships 18
3.2 Notational Conventions 19
3.3 Port Timers State Machine 20
3.4 Port Information State Machine 21
3.5 Port Role Selection State Machine 22
3.6 Port States Transitions State Machine 23
3.7 Port Role Transitions State Machine 24
3.8 Topology Change State Machine 28
3.9 Port Protocol Migration State Machine 29
3.10 Port Transmit State Machine 30
3.11 Handshake 31
4. 典型案例 32
4.1 链路备份 32
4.2 版本兼容 34
5. 注意事项 35
5.1 Protocol Design Requirements 35
5.2 Symmetric Connectivity 35
5.3 Temporary Loops 35
5.4 Root 35
5.5 Root Bridge Selction 35
5.6 Root Port Selection 36
5.7 Designated Bridge Selction 36
5.8 STP compatibility 36
5.9 Updating learned station information 37
5.10 Protocol Version 37
5.11 Port Role---Unknown 37
5.12 Configuration Message and TCN Message 37
6. 疑难解答 38
6.1 优先级设置 38
6.2 端口角色选择 38
进行了一此小修改.
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本帖最后由 wingking84 于 2006-6-10 19:35 编辑 ]
