单臂路由

原来的基础上，增加一台交换机，接口1、2、/4配置成trunk，路由器进入子接口，最后配置主机的网关

左边交换机：

sys

valn 10

vlan 20

interface gi 1/01/

port link-type access 

port access vlan 10

interface gi 1/0/2

port link-type access

port access vlan 10

interface gi 1/0/3

port link-type access

port access vlan 20

interface gi 1/0/4

port link-type access

port access vlan 20

qu

interface gi 1/0/48

port link-type trunk 

port trunk permit vlan 10 20

右边交换机：

sys

vlan 10

vlan 20

interface gi 1/0/1

port link-type access 

port access vlan 10

interface gi 1/0/2

port link-type access

port access vlan 20

qu

interface gi 1/0/48

port link-type trunk

port trunk permit vlan 10 20

上面交换机：

sys

vlan 10 

vlan 20

interface range gi 1/0/1 to 1/0/2

port link-type trunk

port trunk permit vlan 10 20

interface gi 1/0/48

port link-type trunk 

port trunk permit vlan 10 20

路由器：

sys

interface gi 0/0.10

vlan-type dot1q vid 10

ip address 192.168.10.254 24

interface gi 0/0.20

vlan-type dot1q vid 20

ip address 192.168.20.254 24