R1
config terminal router rip version 2 network 172.16.1.0 network 172.16.2.0 end
R2
config terminal router rip version 2 network 172.16.2.0 network 192.168.1.0 end
Test
show ip route
config terminal router rip version 2 network 172.16.1.0 network 172.16.2.0 end
config terminal router rip version 2 network 172.16.2.0 network 192.168.1.0 end
show ip route