一、基本命令
SW3配置：
[H3C]vlan 10
[H3C-vlan10]vlan 20
[H3C-vlan20]int G1/0
[H3C-GigabitEthernet1/0]port link-mode bridge 设置为二层接口
[H3C-GigabitEthernet1/0]port link-type access 设置接口为access口
[H3C-GigabitEthernet1/0]port access vlan 10 接口划分进vlan10
[H3C-GigabitEthernet1/0]int G2/0
[H3C-GigabitEthernet2/0]port link-mode bridge
[H3C-GigabitEthernet2/0]port link-type access
[H3C-GigabitEthernet2/0]port access vlan 20
[H3C]int range G3/0 G4/0
[H3C-if-range]port link-mode bridge
[H3C-if-range]port link-type trunk
[H3C-if-range]port trunk permit vlan 10 20
[H3C]stp mode mstp 配置生成树
[H3C]stp region-configuration
[H3C-mst-region]region-name zeng
[H3C-mst-region]instance 10 vlan 10
[H3C-mst-region]instance 20 vlan 20
[H3C-mst-region]active region-configuration 区域配置
SW1配置：
[H3C]int G0/2
[H3C-GigabitEthernet0/2]port link-mode bridge
[H3C-GigabitEthernet0/2]port link-type trunk
[H3C-GigabitEthernet0/2]port trunk permit vlan 10 20
[H3C-GigabitEthernet0/2]int G0/0
[H3C-GigabitEthernet0/0]port link-mode bridge
[H3C-GigabitEthernet0/0]port link-type trunk
[H3C-GigabitEthernet0/0]port trunk permit vlan 10 20
[H3C]stp mode mstp
[H3C]stp region-configuration
[H3C-mst-region]region-name zeng
[H3C-mst-region]instance 10 vlan 10
[H3C-mst-region]instance 20 vlan 20
[H3C-mst-region]active region-configuration
[H3C-mst-region]qu
[H3C]stp instance 10 root primary 设置实例10为主根
[H3C]stp instance 20 root secondary 设置实例20为辅根
[H3C]vlan 10
[H3C-vlan10]int vlan 10
[H3C-Vlan-interface10]ip address 192.168.10.253 255.255.255.0
[H3C-Vlan-interface10]vrrp vrid 10 virtual-ip 192.168.10.254
[H3C-Vlan-interface10]vrrp vrid 10 priority 120 设置优先级为120
[H3C-Vlan-interface10]vlan 20
[H3C-vlan20]int vlan 20
[H3C-Vlan-interface20]ip address 192.168.20.252 255.255.255.0
[H3C-Vlan-interface20]vrrp vrid 20 virtual-ip 192.168.20.254
[H3C-Vlan-interface20]vrrp vrid 20 priority 100
SW2配置：
[H3C]int range G0/0 G0/2
[H3C-if-range]port link-mode bridge
[H3C-if-range]port link-type trunk
[H3C-if-range]port trunk permit vlan 10 20
[H3C]stp mode mstp
[H3C]stp region-configuration
[H3C-mst-region]region-name zeng
[H3C-mst-region]instance 10 vlan 20
[H3C-mst-region]instance 20 vlan 20
[H3C-mst-region]active region-configuration
[H3C-mst-region]qu
[H3C]stp instance 20 root primary
[H3C]stp instance 10 root secondary
[H3C]vlan 10
[H3C]vlan 20
[H3C]int vlan 10
[H3C-Vlan-interface10]ip address 192.168.20.253 255.255.255.0
[H3C-Vlan-interface10]vrrp vrid 20 virtual-ip 192.168.20.254
[H3C-Vlan-interface10]vrrp vrid 20 priority 120
[H3C-Vlan-interface10]int vlan 20
[H3C-Vlan-interface20]ip address 192.168.10.252 255.255.255.0
[H3C-Vlan-interface20]vrrp vrid 10 virtual-ip 192.168.10.254
[H3C-Vlan-interface20]vrrp vrid 20 priority 100