交换机一配置
[SW1]vlan batch 10 20
//老规矩先创建好VLAN
[SW1-Ethernet0/0/1]port hybrid pvid vlan 10
[SW1-Ethernet0/0/1]port hybrid untagged vlan 2 to 4094
[SW1-Ethernet0/0/2]port hybrid pvid vlan 20
[SW1-Ethernet0/0/2]port hybrid untagged vlan 2 to 4094
[SW1]stp mode mstp
//进入MSTP模式
什么是MSTP？
MSTP：多实例生成树，让指定的一个VLAN或者多个VLAN生成一颗树实现链路的负载均衡
交换机一配置 - 续
[SW1]stp region-configuration
//对stp配置
[SW1-mst-region]region-name qwq
//区域名称[相同才能通信]
[SW1-mst-region]revision-level 1
//版本级别
[SW1-mst-region]instance 1 vlan 10
//定义实例1为VLAN10
[SW1-mst-region]instance 2 vlan 20
[SW1-mst-region]active region-configuration
**炒鸡重要的一步，不打这一步将前功尽弃**
//保存配置
[SW1-Ethernet0/0/20]port hybrid pvid vlan 20
[SW1-Ethernet0/0/20]port hybrid untagged vlan 2 to 4094
[SW1-Ethernet0/0/21]port hybrid pvid vlan 10
[SW1-Ethernet0/0/21]port hybrid untagged vlan 2 to 4094
交换机二配置
[SW2]vlan batch 10 20
[SW2]stp mode mstp
[SW2]stp region-configuration
[SW2-mst-region]region-name qwq
[SW2-mst-region]revision-level 1
[SW2-mst-region]instance 1 vlan 10
[SW2-mst-region]instance 2 vlan 20
[SW2-mst-region]active region-configuration
[SW2]stp instance 1 root primary
//定义本1为实例的根
[SW2]stp instance 2 root secondary
//定义本2为实例的备根
[SW2]stp enable
//开启MSTP
[SW2-Ethernet0/0/21]port hybrid pvid vlan 10
[SW2-Ethernet0/0/21]port hybrid untagged vlan 2 to 4094
[SW2-Ethernet0/0/22]port hybrid pvid vlan 10
[SW2-Ethernet0/0/22]port hybrid untagged vlan 2 to 4094
[SW2-GigabitEthernet0/0/1]port hybrid pvid vlan 10
[SW2-GigabitEthernet0/0/1]port hybrid untagged vlan 2 to 4094
交换机三配置
[SW3]vlan batch 10 20
[SW3]stp mode mstp
[SW3]stp region-configuration
[SW3-mst-region]region-name qwq
[SW3-mst-region]revision-level 1
[SW3-mst-region]instance 1 vlan 10
[SW3-mst-region]instance 2 vlan 20
[SW3-mst-region]active region-configuration
[SW3]stp instance 1 root secondary
//定义本1为实例的根
[SW3]stp instance 2 root primary
//定义本2为实例的备根
[SW3]stp enable
//开启MSTP
[SW3-Ethernet0/0/21]port hybrid pvid vlan 10
[SW3-Ethernet0/0/21]port hybrid untagged vlan 2 to 4094
[SW3-Ethernet0/0/22]port hybrid pvid vlan 10
[SW3-Ethernet0/0/22]port hybrid untagged vlan 2 to 4094
[SW3-GigabitEthernet0/0/1]port hybrid pvid vlan 10
[SW3-GigabitEthernet0/0/1]port hybrid untagged vlan 2 to 4094
路由器配置
[R1-GigabitEthernet0/0/1]ip address 192.168.1.1 24
//主机网关
[R1-GigabitEthernet0/0/2]ip address 192.168.2.1 24