hostname R2
!
no ip domain lookup      
!
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface Serial1/0
 bandwidth 100000
 ip unnumbered Loopback0
!         
interface Serial1/1
 bandwidth 300000
 ip unnumbered Loopback0
!
router ospf 1
 router-id 2.2.2.2
 log-adjacency-changes
 network 0.0.0.0 255.255.255.255 area 0