一、实验拓扑图：

注意：单臂路由一定要在路由器上创建vlan（根思科、华为不同）

二、设置交换机SW1

[H3C]undo info-center enable
Information center is disabled.
[H3C]sysname 2sw1
[2sw1]vlan 10
[2sw1-vlan10]vlan 20
[2sw1-vlan20]quit
[2sw1]interface g 1/0/1
[2sw1-GigabitEthernet1/0/1]port access vlan 10
[2sw1-GigabitEthernet1/0/1]quit
[2sw1]interface g 1/0/2
[2sw1-GigabitEthernet1/0/2]port access vlan 20
[2sw1-GigabitEthernet1/0/2]quit
[2sw1]interface g 1/0/3
[2sw1-GigabitEthernet1/0/3]port link-type trunk
[2sw1-GigabitEthernet1/0/3]port trunk permit vlan 10 20
[2sw1-GigabitEthernet1/0/3]quit

三、配置路由器R1

<H3C>system-view
System View: return to User View with Ctrl+Z.
[H3C]undo info-center enable
Information center is disabled.
[H3C]sysname R1
[R1]vlan 10
[R1-vlan10]vlan 20
[R1-vlan20]quit
[R1]interface g0/0.10	进入g0/0.10的子接口
[R1-GigabitEthernet0/0.10]vlan-type dot1q vid 10	vlan类型将vlan10封装成802.1q

[R1-GigabitEthernet0/0.10]ip address 192.168.1.254 24	设置IP地址192.168.1.254 24
[R1-GigabitEthernet0/0.10]quit
[R1]interface g0/0.20	进入g0/0.20的子接口
[R1-GigabitEthernet0/0.20]vlan-type dot1q vid 20	vlan类型将vlan20封装成802.1q
[R1-GigabitEthernet0/0.20]ip address 192.168.2.254 24	设置IP地址192.168.2.254 24
[R1-GigabitEthernet0/0.20]quit

四、配置PC IP：

四、192.168.1.1 ping 192.168.2.1