⚪实验目的：设置VLAN经过不同的交换机，在主设备故障时可以切换到隔壁部门的交换机进行数据传输，保障通信正常。
⚪实验环境：在华为ENSP设备中完成拓扑图建立如图所示ENSP拓扑图：
分别配置好PC1和PC2的IP地址，网关，子网掩码
一、接着在SW3中设置命令
sys [Huawei]sys SW3
[SW3]v b 10 20[SW3]int e0/0/1[SW3-Ethernet0/0/1]p l a
[SW3-Ethernet0/0/1]p d v 10[SW3-Ethernet0/0/1]un sh
[SW3-Ethernet0/0/1]int e0/0/2[SW3-Ethernet0/0/2]p l a
[SW3-Ethernet0/0/2]p d v 20[SW3-Ethernet0/0/2]int g0/0/1
[SW3-GigabitEthernet0/0/1]p l t
[SW3-GigabitEthernet0/0/1]p t a v 10 20
[SW3-GigabitEthernet0/0/1]int g0/0/2
[SW3-GigabitEthernet0/0/2]p l t
[SW3-GigabitEthernet0/0/2]p t a v 10 20
二、在三层交换机SW1中划分vlan，配置接口性质
sys
[Huawei]sys SW1
[SW1]vlan batch 10 20 100
[SW1]interface GigabitEthernet0/0/1
[SW1-GigabitEthernet0/0/1]port link-type access
[SW1-GigabitEthernet0/0/1]port default vlan 100
[SW1-GigabitEthernet0/0/1]interface GigabitEthernet0/0/
[SW1-GigabitEthernet0/0/2]port link-type trunk
[SW1-GigabitEthernet0/0/2]port trunk allow-pass vlan 10 20
进入vlanif中配置ip地址和arrp
[SW1-GigabitEthernet0/0/2]interface Vlanif10
[SW1-Vlanif10]ip address 192.168.10.10 255.255.255.0
[SW1-Vlanif10]vrrp vrid 1 virtual-ip 192.168.10.1
[SW1-Vlanif10]vrrp vrid 1 priority 120
[SW1-Vlanif10]vrrp vrid 1 track interface GigabitEthernet0/0/1
[SW1-Vlanif10]vrrp vrid 1 track interface GigabitEthernet0/0/2
[SW1-Vlanif10]interface Vlanif20
[SW1-Vlanif20]ip address 192.168.20.10 255.255.255.0
[SW1-Vlanif20]vrrp vrid 2 virtual-ip 192.168.20.1
[SW1-Vlanif20]vrrp vrid 2 priority 115
[SW1-Vlanif20]interface Vlanif100
[SW1-Vlanif100]ip address 11.0.0.2 255.255.255.252
配置静态路由[SW1-Vlanif100]q
[SW1]ip route-static 0.0.0.0 0.0.0.0 11.0.0.1
三、在三层交换机SW2中划分vlan，配置接口性质
sys
[Huawei]sys SW2
[SW2]vlan batch 10 20 100
[SW2]interface GigabitEthernet0/0/1
[SW2-GigabitEthernet0/0/1]port link-type access
[SW2-GigabitEthernet0/0/1]port default vlan 100
[SW2-GigabitEthernet0/0/1]interface GigabitEthernet0/0/2
[SW2-GigabitEthernet0/0/2]port link-type trunk
[SW2-GigabitEthernet0/0/2]port trunk allow-pass vlan 10 20
进入vlanif中配置ip地址和arrp
[SW2-GigabitEthernet0/0/2]interface Vlanif10
[SW2-Vlanif10]ip address 192.168.10.20 255.255.255.0
[SW2-Vlanif10]vrrp vrid 1 virtual-ip 192.168.10.1
[SW2-Vlanif10]vrrp vrid 1 priority 115
[SW2]int vlanif 20
[SW2-Vlanif20]ip address 192.168.20.20 255.255.255.0
[SW2-Vlanif20]vrrp vrid 2 virtual-ip 192.168.20.1
[SW2-Vlanif20]vrrp vrid 2 priority 120
[SW2-Vlanif20]vrrp vrid 2 track interface GigabitEthernet 0/0/1
[SW2-Vlanif20]vrrp vrid 2 track interface GigabitEthernet 0/0/2
[SW2-Vlanif20]interface Vlanif100
[SW2-Vlanif100]ip address 12.0.0.2 255.255.255.252
配置静态路由[SW2-Vlanif100]q
[SW2]ip route-static 0.0.0.0 0.0.0.0 12.0.0.1
四、在路由器R1中配置各个接口的地址
sys
[Huawei]sys R1
[R1]interface g0/0/0
[R1-GigabitEthernet0/0/0]ip add 11.0.0.1 30
[R1-GigabitEthernet0/0/0]int g0/0/1
[R1-GigabitEthernet0/0/1]ip add 12.0.0.1 30
[R1-GigabitEthernet0/0/1]int LoopBack 0
[R1-LoopBack0]ip add 1.1.1.1 24配置浮动路由
[R1-LoopBack0]q
[R1]ip route-static 192.168.10.0 255.255.255.0 11.0.0.2
[R1]ip route-static 192.168.10.0 255.255.255.0 12.0.0.2 preference 70
[R1]ip route-static 192.168.20.0 255.255.255.0 12.0.0.2
[R1]ip route-static 192.168.20.0 255.255.255.0 11.0.0.2 preference 70
六、在R1的G0/0/0口抓包，PC1 ping 1.1.1.1
七、在R1的G0/0/1口抓包，PC2 ping 1.1.1.1
八、关闭SW1，在R1的G0/0/1口抓包，PC1 ping 1.1.1.1
在R2的G0/0/1口抓包，PC2 ping 1.1.1.1
实验结束。
实验要点：浮动路由默认是优先级是60，越小越优先，如果是第二条路由
优先级是比默认的要大，一般配置60以上