RSTP概要1,快速生成树原理

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1、RSTP概要关于此文有任何疑问或者建议请到www.51cto.com或者游来游去岛留言,也可以直接给我发邮件.crazycat84@sina.com二〇〇六年五月天外飞仙一剑西来紫禁之巅月圆之夜目录1.协议简介(Overview).................................11.1开天辟地的第一代生成树协议：STP/RSTP.................11.2聪明伶俐的第二代生成树协议：PVST/PVST+...............51.3多实例化的第三代生成树协议：M

2、ISTP/MSTP...............71.4生成树协议的未来之路................................92.基本概念(Definition)...............................92.1端口角色(PortRole)...............................92.1.1根端口(RootPort)............................92.1.2指定端口(DesignatedPort)...........

3、..........92.1.3备份端口(BackupPort)........................102.1.4替换端口(AlternatePort).....................102.2端口状态(PortState).............................102.2.1丢弃(Discarding)............................112.2.2学习(Learning)..............................112

4、.2.3转发(Forwarding)............................112.3端口参数(Per-Portvariables).....................112.3.1端口ID(PortIdentifier).....................112.3.2边缘端口(EdgePort)..........................112.3.3链路类型(LinkType)..........................11I天外飞仙一剑西来紫禁之巅月

5、圆之夜2.3.4端口链路代价(PortPathCost).................122.4网桥参数(Per-Bridgevariables)...................122.4.1网桥ID(BridgeIdentifier)...................122.4.2最大消息生存时间(maximumage).................122.4.3转发延迟(ForwardDelay)......................122.4.4保活时间(HelloTim

6、e).........................122.5状态机参数(Statemachineparameters).............132.5.1老化时间(AgeingTime)........................132.5.2迁移时间(MigrateTime).......................132.5.3拓扑变化通知时间(TCWhile)....................132.5.4传输间隔(TransmitHoldCount)...........

7、.....132.5.5协议版本(ForceProtocolVersion).............132.6参数取值(ParameterValue)........................142.6.1性能参数(PerformaceParameter)...............142.6.2端口链路代价(PortPathCost).................142.7消息封装(EncodingofBPDUs)......................152.7.1Encodin

8、gofProtocolIdentifiers...........162.7.2EncodingofProtocolVersionIdentifiers...162.7.3EncodingofBPDUTypes.....................162.7.4EncodingofFlags..........................162.7.5EncodingofBridgeIdentifiers.............172.7.6E