hostname R1
int lo 0
ip addr 1.1.1.1 255.255.255.255
no shutdown
ip route 2.2.2.0 255.255.255.0 s1/0 12.1.1.2
do ping 2.2.2.2
do ping 2.2.2.2 source 1.1.1.1
CLOCK RATE ON SERIAL INTERFACE
To configure the clock rate for the hardware connections on serial interfaces such as network interface modules (NIMs) and
interface processors to an acceptable bit rate, use the clockrate
command in interface configuration mode. When you set the clock rate for a serial interface,
you are setting the speed of the interface, in other words, the bandwidth (bandwidth meaning rate of data transfer). When using this command it’s in the form of bits: 64000 bits = 64 kb.
So, set the settings like the picture below,

Please, set your IP Address,
# writ (write) means to save your running config instead of using copy running-config startup-config command.

See the picture above, the command do sh ip int brief
means to do show ip interface brief, so you can check everytime that you need to check your ip that is it correct or no.
Now creating loopback interface, A loopback interface is a virtual interface that can be configured on a router. When we say it is a virtual interface this means
that it logically exists but it does not exist physically (there is no physical interface and no cable to plug into it). Now try to run command,
Adapt and run the command above into Router2 also, see the result below,

hostname Router
do writ
int s1/0
ip addr IP Address 255.255.255.0
no shutdown
clock rate 64000
do sh ip int brief
exit