R1#sh run | b router ospf
router ospf 1
 router-id 1.1.1.1
 log-adjacency-changes
 network 17.0.0.0 0.255.255.255 area 0
!

R3#sh run | b ospf
router ospf 1
 router-id 3.3.3.3
 log-adjacency-changes
 network 17.0.0.0 0.255.255.255 area 0
!

R4#sh run | b ospf
router ospf 1
 router-id 4.4.4.4
 log-adjacency-changes
 network 17.0.0.0 0.255.255.255 area 0
!


S6#sh run | b ospf
router ospf 1
 router-id 6.6.6.6
 log-adjacency-changes
 network 17.0.0.0 0.255.255.255 area 0
!