实验8生成树配置—生成树协议STP.doc

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1、实验八生成树配置一生成树协议STP1实验名称生成树协议STP2实验目的理解生成树协议STP的配置及原理3背景描述某学校为了开展计算机教学和网络办公，建立了一个计算机教室和一个校办公区，这两处的计算机网络通过两台交换机互联组成内部校园网，为了提高网络的可靠性，网络管理员用了2条链路将交换机互连，现要在交换机上做适当的配置，使网络避免环路。木实验以2台S3550-24交换机为例，2台交换机分别命名为SwitchA,SwithcB。PC1与PC2在同一个网段，假设IP地址分别为192.168.0.137,192.168.0.136,网络掩码为255.255.255.0.

2、4实验功能使网络在有冗余链路的情况下避免环路的产生，避免广播风暴等。5实验步骤步骤一.在SwitchA和SwithcB上分别开启生成树协议。这里对SwithcA做配置SwitchA>enable14Password:SwitchA#configureterminalEnterconfigurationcommands,oneperline・EndwithCNTL/Z.SwitchA(config)#spanning-treeSwitchA(config)#end验证测试：SwitchA#$howspanning-treeStpVersion:RSTPSysStpS

3、tatus:EnabledBaseNumPorts:24MaxAge:20HelloTime:2ForwardDelay:15BridgeMaxAge:20BridgeHelloTime:2BridgeForwardDelay:15MaxHops:20TxHoldCount:3PathCostMethod:LongBPDUGuard:DisabledBPDUFilter:DisabledBridgeAddr:00d0.f8ff.837cPriority:8192TimeSinceTopologyChange:0d:0h:26m:8sTopologyChanges:

4、0DesignatedRoot:200000D0F8FF837CRootCost:0Roo田oft:0步骤二.设置生成树模式SwitchA#configureterminalEnterconfigurationcommands,oneperline・EndwithCNTLVZ.SwitchA(config)#spanning-treemodestpSwitchA(config)#exit验证测试：SwitchA#showspanning-t「eeStpVersion:STPSysStpStatus:EnabledBaseNumPorts:24MaxAge:20He

5、lloTime:2ForwardDelay:15BridgeMaxAge:20BridgeHelloTime:2BridgeForvvardDelay:15MaxHops:20TxHoldCount:3PathCostMethod:LongBPDUGuard:DisabledBPDUFilter:DisabledBridneAddr:00d0.f8ff.837cPriority:8192TimeSinceTopologyChange:0d:0h:27m:2sTopologyChanges:0DesignatedRoot:200000D0F8FF837CRootCo

6、st:0RootPort:0步骤三.设置交换机A的优先级为4096(交换机B的优先级采用默认的优先级32768)SwitchA#configureterminalEnterconfigurationcommands,oneperline・EndwithCNTLVZ.SwitchA(config)#spanning-treepriority4096SwitchA(config)#exit验证测试：SwitchA#showspanning-treeStpVersion:RSTPSysStpStatus:EnabledBaseNumPorts:24MaxAge:20He

7、lioTime:2ForwardDelay:15BridgeMaxAge:20BridgeHelloTime:2BridgeForwardDelay:15MaxHops:20TxHoldCount:3PathCostMethod:LongBPDUGuard:DisabledBPDUFilter:DisabledBridgeAddr:00d0.f8ff.84a5Priority:8192TimeSinceTopologyChange:0d:lh:18m:43sTopologyChanges:0DesignatedRoot:200000D0F8FF84A5RootCo

8、st:0R