hostname R5
!
no ip domain lookup        
!
interface Loopback0
 ip address 5.5.5.5 255.255.255.255
!
interface Serial1/2
 bandwidth 50000
 ip unnumbered Loopback0
!
interface Serial1/3
 bandwidth 300000
 ip unnumbered Loopback0
!
router ospf 1
 router-id 5.5.5.5
 log-adjacency-changes
 network 0.0.0.0 255.255.255.255 area 0