思科设备交换机STP(生成树协议)配置.docx

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。本例配置模型图命令行：SwitchA配置如下：SwitchA#vlan databaseSwitchA(vlan)#vtp domain tztSwitchA(vlan)#vtp serverSwitchA(vlan)#vlan 2 name VLAN2VLAN 2 added: Name: VLAN2SwitchA(vlan)#vlan 3 name VLAN3VLAN 3 added: Name: VLAN3SwitchA(vlan)#vlan 4 name VLAN4VLAN 4 added: Name: VLAN4SwitchA(vlan)#exitSwitchA#configure terminalSwitchA(config)#interface f0/1 /配置switchA的f0/1端口为trunk模式，允许所有vlan通过SwitchA(config-if)#switchport mode trunkSwitchA(config-if)#switchport trunk allowed vlan allSwitchA(config-if)#exitSwitchA(config)#interface f0/2 /配置switchA的f0/1端口为trunk模式，允许所有vlan通过SwitchA(config-if)#switchport mode trunkSwitchA(config-if)#switchport trunk allowed vlan allSwitchA(config-if)#endSwitchA#writeSwitchA#configure terminal /将模型图中switchA对应端口划分到各vlan中SwitchA(config)#interface f0/4SwitchA(config-if)#switchport mode accessSwitchA(config-if)#switchport access vlan 2SwitchA(config-if)#exitSwitchA(config)#interface f0/5SwitchA(config-if)#switchport mode accessSwitchA(config-if)#switchport access vlan 3SwitchA(config-if)#exitSwitchA(config)#interface f0/6SwitchA(config-if)#switchport mode accessSwitchA(config-if)#switchport access vlan 4SwitchA(config-if)#exitSwitchA(config-if)#endSwitchA#writeSwitchA#show vlan /查看vlan信息VLAN Name Status Ports- - - -1 default active Fa0/3, Fa0/8, Fa0/9, Fa0/10 Fa0/11, Fa0/12, Fa0/13, Fa0/14 Fa0/15, Fa0/16, Fa0/17, Fa0/18 Fa0/19, Fa0/20, Fa0/21, Fa0/22 Fa0/23, Fa0/24, Gig1/1, Gig1/22 VLAN2 active Fa0/43 VLAN3 active Fa0/54 VLAN4 active Fa0/65 VLAN5 active Fa0/7/在交换机SwitchA设置各VLAN在Trunk端口的STP值SwitchA(config)#interface f0/1SwitchA(config-if)#spanning-tree vlan 1 port-priority 16SwitchA(config-if)#spanning-tree vlan 2 port-priority 16SwitchA(config-if)#exitSwitchA(config)#interface f0/2SwitchA(config-if)#spanning-tree vlan 3 port-priority 16SwitchA(config-if)#spanning-tree vlan 4 port-priority 16SwitchA(config-if)#endSwitchA#copy running-config startup-configSwitchA配置如下：在交换机SwitchB上配置VTP Client学习VLAN信息并配置VLAN TrunkSwitchB#vlan databaseSwitchB(vlan)#vtp domain tztSwitchB(vlan)#vtp clientSwitchB(vlan)#exitSwitchB#configure terminalSwitchB(config)#interface f0/1SwitchB(config-if)#switchport mode trunkSwitchB(config-if)#switchport trunk allowed vlan allSwitchB(config-if)#exitSwitchB(config)#interface f0/2SwitchB(config-if)#switchport mode trunkSwitchB(config-if)#switchport trunk allowed vlan allSwitchB(config-if)#exitSwitchB#write在交换机SwitchB把端口归属各相应的VLANSwitchB#configure terminalSwitchB(config)#interface f0/4SwitchB(config-if)#switchport mode accessSwitchB(config-if)#switchport access vlan 2SwitchB(config-if)#exitSwitchB(config)#interface f0/5SwitchB(config-if)#switchport mode accessSwitchB(config-if)#switchport access vlan 3SwitchB(config-if)#exitSwitchB(config)#interface f0/6SwitchB(config-if)#switchport mode accessSwitchB(config-if)#switchport access vlan 4SwitchB(config-if)#endSwitchB#writeSwitchB#show vlanVLAN Name Status Ports- - - -1 default active Fa0/3, Fa0/7.Fa0/8, Fa0/9, Fa0/10 Fa0/11, Fa0/12, Fa0/13, Fa0/14 Fa0/15, Fa0/16, Fa0/17, Fa0/18 Fa0/19, Fa0/20, Fa0/21, Fa0/22 Fa0/23, Fa0/24, Gig1/1, Gig1/22 VLAN2 active Fa0/43 VLAN3 active Fa0/54 VLAN4 active Fa0/6在交换机SwitchC设置各VLAN在Trunk端口的STP值、SwitchB(config)#interface f0/1SwitchB(config-if)#spanning-tree vlan 1 port-priority 16SwitchB(config-if)#spanning-tree vlan 2 port-priority 16SwitchB(config-if)#exitSwitchB(config)#interface f0/2SwitchB(config-if)#spanning-tree vlan 3 port-priority 16SwitchB(config-if)#spanning-tree vlan 4 port-priority 16SwitchB(config-if)#endSwitchB#copy running-config startup-config查看配置情况：SwitchA#show interfaces trunk Port Mode Encapsulation Status Native vlanFa0/1 on 802.1q trunking 1Fa0/2 on 802.1q trunking 1Port Vlans allowed on trunkFa0/1 1-10