configure terminal
!
hostname Router_6
!
interface Loopback0
 ip address 150.1.6.6 255.255.255.0
!
interface gigabitEthernet0/0
 ip address 152.1.6.6 255.255.255.0
 duplex auto
 speed auto
 no shut 
!
interface Serial0/0/0
 ip address 152.1.136.6 255.255.255.0
 encapsulation frame-relay
 no shut
!
end
!
write memory