Step 1 Configure R1 with a Loopback0 interface of 10.1.1.1 255.255.255.255
Step 2 Configure R2 with a Loopback0 interface of 10.2.2.2 255.255.255.255
Step 3 Configure R3 with a Loopback0 interface of 10.3.3.3 255.255.255.255
Step 4 Copy all running-configs to the NVRAM and reload routers