Configuration Guide Managing Routes
 Configure interface addresses on each device.
R1# configure terminal
R1(config)#interface gigabitEthernet 0/0
R1(config-if-GigabitEthernet 0/0)# ip address 1.1.1.1 255.255.255.0
R1(config-if-GigabitEthernet 0/0)# exit
R1(config)#interface gigabitEthernet 0/2
R1(config-if-GigabitEthernet 0/2)# ip address 1.1.12.1 255.255.255.0
R1(config-if-GigabitEthernet 0/0)# exit
R1(config)#interface gigabitEthernet 0/3
R1(config-if-GigabitEthernet 0/3)# ip address 1.1.13.1 255.255.255.0
R2# configure terminal
R2(config)#interface gigabitEthernet 0/0
R2(config-if-GigabitEthernet 0/0)# ip address 1.1.2.1 255.255.255.0
R2(config-if-GigabitEthernet 0/0)# exit
R2(config)#interface gigabitEthernet 0/1
R2(config-if-GigabitEthernet 0/1)# ip address 1.1.12.2 255.255.255.0
R2(config-if-GigabitEthernet 0/0)# exit
R2(config)#interface gigabitEthernet 0/3
R2(config-if-GigabitEthernet 0/3)# ip address 1.1.23.2 255.255.255.0
R3# configure terminal
R3(config)#interface gigabitEthernet 0/0
R3(config-if-GigabitEthernet 0/0)# ip address 1.1.3.1 255.255.255.0
R3(config-if-GigabitEthernet 0/0)# exit
R3(config)#interface gigabitEthernet 0/1
R3(config-if-GigabitEthernet 0/1)# ip address 1.1.13.3 255.255.255.0
R3(config-if-GigabitEthernet 0/0)# exit
R3(config)#interface gigabitEthernet 0/2
R3(config-if-GigabitEthernet 0/2)# ip address 1.1.23.3 255.255.255.0