configure terminal
!
hostname Router_3
!
interface FastEthernet0/0
 ip address 135.1.37.3 255.255.255.0
 no shutdown
!
interface FastEthernet0/1
 ip address 135.1.35.3 255.255.255.0
 no shutdown
!
interface Serial0/0
 encapsulation frame-relay
 ip address 135.1.134.3 255.255.255.0
 no shutdown
!
interface loopback0
 ip address 155.1.3.3 255.255.255.0
!
end
!
write memory