思科设备交换机STP(生成树协议)配置

1、本次讲解STP（生成树协议）配置方法:当交换机之间有多个VLAN时Trunk线路负载会过重，这时需要设置多个Trunk端口，但这样会形成网络环路。而STP协议便可以解决这个问题。Laptop-PiLL92-168.1.?vl：=lTl2vl:ElTl2fa/3vl：=LlL3vl:m3Laptop-PT192.168.31Laptop-PT192.L68.2-2iSTi时U爼么加，七/、Laptop-PT192.163.3.2本例配置模型图v1：=lTl1ptop-PT192.168.1-2vl:dTl4Laptop-PT192-168-4.2v1：tl4Laptop-PT192.168.4.

2、1命令行:SwitchA配置如下:SwitchA#vlandatabaseSwitchA(vlan)#vtpdomaintztSwitchA(vlan)#vtpserverSwitchA(vlan)#vlan2nameVLAN2VLAN2added:Name:VLAN2SwitchA(vlan)#vlan3nameVLAN3VLAN3added:Name:VLAN3SwitchA(vlan)#vlan4nameVLAN4VLAN4added:Name:VLAN4SwitchA(vlan)#exitSwitchA#configureterminalSwitchA(config)#interfac

3、efO/1/配置switchA的fO/1端口为trunk模式，允许所有vlan通过ISwitchA(config-if)#switchportmodetrunkSwitchA(config-if)#switchporttrunkallowedvlanallSwitchA(config-if)#exitiSwitchA(config)#interfacef0/2/配置switchA的f0/1端口为trunk模式，允许所有vlan通过:iTOC o 1-5 h zISwitchA(config-if)#switchportmodetrunk:iiSwitchA(config-if)#switchp

4、orttrunkallowedvlanalljSwitchA(config-if)#end;iSwitchA#writei!SwitchA#configureterminal/将模型图中switchA对应端口划分到各vlan中iSwitchA(config)#interfacef0/4jSwitchA(config-if)#switchportmodeaccess:SwitchA(config-if)#switchportaccessvlan2:SwitchA(config-if)#exit|iSwitchA(config)#interfacefO/5iiSwitchA(config-if)#

5、switchportmodeaccessjSwitchA(config-if)#switchportaccessvlan3:SwitchA(config-if)#exitSwitchA(config)#interfacefO/6:iSwitchA(config-if)#switchportmodeaccessiSwitchA(config-if)#switchportaccessvlan4；SwitchA(config-if)#exit|SwitchA(config-if)#endiSwitchA#writeiSwitchA#showvlan/查看vlan信息IIVLANNameStatusP

6、ortsi1defaultactiveFaO/3,FaO/8,FaO/9,Fa0/10IFaO/11,FaO/12,FaO/13,FaO/14|FaO/15,FaO/16,FaO/17,FaO/18|FaO/19,Fa0/20,FaO/21,FaO/22|FaO/23,FaO/24,Gig1/1,Gig1/2|2VLAN2activeFaO/43VLAN3activeFaO/54VLAN4activeFaO/6|5VLAN5activeFaO/7/在交换机SwitchA设置各VLAN在Trunk端口的STP值SwitchA(config)#interfacefO/1SwitchA(config

7、-if)#spanning-treevlan1port-priority16SwitchA(config-if)#spanning-treevlan2port-priority16SwitchA(config-if)#exitSwitchA(config)#interfacef0/2SwitchA(config-if)#spanning-treevlan3port-priority16SwitchA(config-if)#spanning-treevlan4port-priority16SwitchA(config-if)#endSwitchA#copyrunning-configstartu

8、p-configSwitchA配置如下：在交换机SwitchB上配置VTPClient学习VLAN信息并配置VLANTrunkSwitchB#vlandatabaseSwitchB(vlan)#vtpdomaintztSwitchB(vlan)#vtpclientSwitchB(vlan)#exitSwitchB#configureterminalSwitchB(config)#interfacef0/1SwitchB(config-if)#switchportmodetrunkSwitchB(config-if)#switchporttrunkallowedvlanallSwitchB(co

9、nfig-if)#exitSwitchB(config)#interfacef0/2SwitchB(config-if)#switchportmodetrunkSwitchB(config-if)#switchporttrunkallowedvlanallSwitchB(config-if)#exitSwitchB#write在交换机SwitchB把端口归属各相应的VLANSwitchB#configureterminalSwitchB(config)#interfacef0/4SwitchB(config-if)#switchportmodeaccessSwitchB(config-if)#

10、switchportaccessvlan2SwitchB(config-if)#exitSwitchB(config)#interfacef0/5SwitchB(config-if)#switchportmodeaccessSwitchB(config-if)#switchportaccessvlan3SwitchB(config-if)#exitSwitchB(config)#interfacef0/6SwitchB(config-if)#switchportmodeaccessSwitchB(config-if)#switchportaccessvlan4SwitchB(config-if

11、)#endSwitchB#writeSwitchB#showvlanVLANNameStatusPortsdefaultactiveFa0/3,Fa0/7.Fa0/8,Fa0/9,Fa0/10FaO/11,FaO/12,FaO/13,FaO/14FaO/15,FaO/16,FaO/17,FaO/18FaO/19,FaO/2O,FaO/21,FaO/22FaO/23,FaO/24,Gig1/1,Gig1/2VLAN2VLAN3VLAN4activeFaO/4activeFaO/5activeFaO/6在交换机SwitchC设置各VLAN在Trunk端口的STP值、SwitchB(config)#

12、interfacefO/1SwitchB(config-if)#spanning-treevlan1port-priority16SwitchB(config-if)#spanning-treevlan2port-priority16SwitchB(config-if)#exitSwitchB(config)#interfacefO/2SwitchB(config-if)#spanning-treevlan3port-priority16SwitchB(config-if)#spanning-treevlan4port-priority16SwitchB(config-if)#endSwitchB#copyrunning-configstartup-config查看配置情况:SwitchA#showinterfacestrunkPortModeEncapsulationStatusNativevlanFaO/1on802.1qtrunking1FaO/2on802.1qtrunking1PortVlansall