拓扑图：
1、配置pc的IP地址
2、配置交换机LSW2
<Huawei>sys[Huawei]undo info-center enable [Huawei]vlan 2[Huawei-vlan2]quit[Huawei]vlan 3[Huawei-vlan3]quit[Huawei]int e0/0/1[Huawei-Ethernet0/0/1]port link-type access [Huawei-Ethernet0/0/1]port default vlan 2[Huawei-Ethernet0/0/1]int e0/0/2[Huawei-Ethernet0/0/2]port link-type access [Huawei-Ethernet0/0/2]port default vlan 3[Huawei-Ethernet0/0/2]int g0/0/1[Huawei-GigabitEthernet0/0/1]port link-type trunk [Huawei-GigabitEthernet0/0/1]port trunk allow-pass vlan all
3、配置交换机LSW3
<Huawei>sys[Huawei]undo info-center enable [Huawei]vlan 2[Huawei-vlan2]quit [Huawei]vlan 3[Huawei-vlan3]quit[Huawei]int e0/0/1[Huawei-Ethernet0/0/1]port link-type access [Huawei-Ethernet0/0/1]port default vlan 2[Huawei-Ethernet0/0/1]int e0/0/2[Huawei-Ethernet0/0/2]port link-type access [Huawei-Ethernet0/0/2]port default vlan 3[Huawei-Ethernet0/0/2]int e0/0/3[Huawei-Ethernet0/0/3]port link-type access [Huawei-Ethernet0/0/3]port default vlan 2[Huawei-Ethernet0/0/3]int g0/0/1[Huawei-GigabitEthernet0/0/1]port link-type trunk [Huawei-GigabitEthernet0/0/1]port trunk allow-pass vlan all
4、pc1与pc4互ping结果
5、配置三层交换机LSW1
<Huawei>sys[Huawei]undo info-center enable [Huawei]vlan 2[Huawei-vlan2]quit [Huawei]vlan 3[Huawei-vlan3]quit [Huawei]int g0/0/2[Huawei-GigabitEthernet0/0/2]port link-type trunk [Huawei-GigabitEthernet0/0/2]port trunk allow-pass vlan all [Huawei-GigabitEthernet0/0/2]int g0/0/3[Huawei-GigabitEthernet0/0/3]port link-type trunk [Huawei-GigabitEthernet0/0/3]port trunk allow-pass vlan all [Huawei-GigabitEthernet0/0/3]quit[Huawei]int vlan 2[Huawei-Vlanif2]ip add 192.168.100.100 24[Huawei-Vlanif2]quit[Huawei]int vlan 3[Huawei-Vlanif3]ip add 10.100.100.100 24[Huawei-Vlanif3]quit[Huawei]
6、实验结果（vlan2中的pc1可以ping通vlan3中的pc4）
