One-arm routing configuration ideas
Layer 2 switches: create vlan3, vlan2, divide vlan, configure trunk mode
router: create sub-interface, encapsulate 802.1q and identify interface vlan, configure gateway
Layer 2: fa 0/1 trunk road mode, fa0/2 vlan 2, fa0/3 vlan 3
Router: fa 0/0.1 192.168.1.254, fa0/0.2 192.168.2.254
pc0: 192.168.1.1/24
pc1: 192.168.2.1/ twenty four
二层交换机：
Switch(config)#vlan 2
Switch(config-vlan)#vlan 3
Switch(config)#in fa 0/2
Switch(config-if)#switchport access vlan 2
Switch(config-if)#in fa 0/3
Switch(config-if)#switchport access vlan 3
Switch(config-if)#in fa 0/1
Switch(config-if)#switchport mode trunk
路由器：
Router(config)#interface fastEthernet 0/0
Router(config-if)#no shutdown
Router(config)#interface fastEthernet 0/0.1
Router(config-subif)#encapsulation dot1Q 2
Router(config-subif)#ip address 192.168.1.254 255.255.255.0
Router(config)#interface fastEthernet 0/0.2
Router(config-subif)#encapsulation dot1Q 3
Router(config-subif)#ip address 192.168.2.254 255.255.255.0