H3C单臂路由
单臂路由的技术是以前为了解决路由器设备物理接口不够用的问题。
如图：
实现三台电脑互访：
交换机配置：
[H3C]sysname SWA
[SWA]vlan 2
[SWA-vlan2]port GigabitEthernet 1/0/1
[SWA-vlan2]vlan 3
[SWA-vlan3]port GigabitEthernet 1/0/2
[SWA-vlan3]vlan 4
[SWA-vlan4]port GigabitEthernet 1/0/3
[SWA-vlan4]quit
[SWA]interface GigabitEthernet 1/0/4
[SWA-GigabitEthernet1/0/4]port link-type trunk
[SWA-GigabitEthernet1/0/4]port trunk permit vlan 2 3 4
[SWA-GigabitEthernet1/0/4]quit
配置路由器：
[H3C]sysname RTA
[RTA]interface GigabitEthernet 0/0.2
[RTA-GigabitEthernet0/0.2]vlan-type dot1q vid 2 //802.1q封装协议,vlan id 是2
[RTA-GigabitEthernet0/0.2]ip address 192.168.2.254 24
[RTA-GigabitEthernet0/0.2]interface GigabitEthernet 0/0.3
[RTA-GigabitEthernet0/0.3]vlan-type dot1q vid 3
[RTA-GigabitEthernet0/0.3]ip address 192.168.3.254 24
[RTA-GigabitEthernet0/0.3]interface GigabitEthernet 0/0.4
[RTA-GigabitEthernet0/0.4]vlan-type dot1q vid 4
[RTA-GigabitEthernet0/0.4]ip address 192.168.4.254 24
[RTA-GigabitEthernet0/0.4]quit
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