How to configure two Cisco Router together

Basic of Two Router LAB

Configuration of Router 1

Router>en
Router#conf t  

Provide Host name to the router 1 
Router(config)#hostname R1

Assign IP address to the R1 port
R1(config)#int fa0/0
R1(config-if)#ip add 10.1.1.1 255.0.0.0
R1(config-if)#no shut
R1(config)#int fa0/1
R1(config-if)#ip add 192.168.1.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#exit
R1(config)#exit

To save Configuration
R1#copy running-config startup-config 
Building configuration...
[OK]

Configuration of Router 2

Router>en
Router#conf t

Provide Host name to the router 1 
Router(config)#hostname R2

assign IP address to the R2 port 
R2(config)#int fa0/0
R2(config-if)#ip add 10.1.1.2 255.0.0.0
R2(config-if)#no shut
R2(config-if)#int fa0/1
R2(config-if)#ip add 172.17.1.1 255.255.0.0
R2(config-if)#no shut
R2(config-if)#exit
R2(config)#exit

To save Configuration
R2#copy running-config startup-config 
Building configuration...
[OK]