Inter-VLAN Communication: Router-on-a-Stick

Router(config)#int fa 0/0	Enters interface mode for interface fa 0/0
Router(config-if)#no shut	Turns the interface on
Router(config-if)#int fa 0/0.1	Creates subinterface 0/0.1
Router(config-subif)#encapsulation dot1q 1 native	Assigns the native VLAN (usually VLAN 1) to this logical subinterface
Router(config-subif)#ip address 192.168.1.1 255.255.255.0	Assigns an IP address to the subinterface
Router(config-subif)#int fa 0/0.10	Creates subinterface 0/0.10
Router(config-subif)#encapsulation dot1q 10	Assigns VLAN 10 to this subinterface
Router(config-subif)#ip address 192.168.10.1 255.255.255.0	Assigns an IP address to the subinterface
Router(config-subif)#
Router#