configure terminal
!
hostname Router_2
!
interface Loopback0
 ip address 150.1.2.2 255.255.255.0
!
interface FastEthernet0/0
 ip address 192.1.102.2 255.255.255.0
 duplex auto
 speed auto
 no shut 
!
interface Serial0/0
 ip address 152.1.125.2 255.255.255.0
 encapsulation frame-relay
 no shut 
!
interface FastEthernet0/1
 ip address 152.1.2.2 255.255.255.0
 duplex auto
 speed auto
 no shut
!
end
!
write memory