R1(config)#int
R1(config)#interface g0/0
R1(config-if)#no shut
R1(config-if)#no shutdown
R1(config)#interface g0/0
R1(config-if)#no shut
R1(config-if)#exit
R1(config)#interface g0/0.10
R1(config-subif)#
%LINK-5-CHANGED: Interface GigabitEthernet0/0.10, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0.10, changed state to up
R1(config-subif)#encapsulation dot1Q 10
R1(config-subif)#ip add
R1(config-subif)#ip address 192.168.1.254 255.255.255.0
R1(config-subif)#no shutdown
R1(config-subif)#exit