Ospf

R1

ena
conf t
router ospf 100
net 172.30.0.0 0.0.0.255 area 0
auto-cost reference-bandwith 100

router-id 1.1.1.1
redistribute static metric 200 subnets

summary-address 172.16.3.0255.255.252.0

end
wr

=====================================

R2

ena
conf t
router ospf 100
net 172.30.0.0 0.0.0.255 area 0
net 172.30.10.0 0.0.0.255 area 10

summary-address 10.10.3.0255.255.252.0

router-id 2.2.2.2

inter fa 0/0
ip ospf priority 0
end
wr

=====================================

R3

ena
conf t
router ospf 100
net 172.30.0.0 0.0.0.255 area 0
net172.30.20.0 0.0.0.255 area 20

summary-address 10.10.3.0 255.255.252.0

router-id 3.3.3.3

inter fa 0/0
ip ospf priority 0

end
wr

=====================================

R4

ena
conf trouter ospf 100
net 172.30.20.0 0.0.0.255 area 20

router-id 4.4.4.4

end
wr

=====================================

R5

ena
conf t
router ospf 100
net 172.30.10.0 0.0.0.255 area 10router-id 5.5.5.5

end
wr

R1

ena
conf t
router ospf 100
net 10.12.3.0 0.0.0.255 area 0
net 1.1.1.1 0.0.0.255 area 0
neighbor 10.12.3.2 priority 0
neighbor 10.12.3.3 priority 0

exitinter se 0/0.1
no ip ospf network
ip ospf priority 255
end
wr

==================================

R2

ena
conf t
router ospf 100
net 10.12.3.0 0.0.0.255 area 0
net 10.24.0.00.0.0.255 area 24
net 2.2.2.2 0.0.0.255
exit

inter se 0/0.1
no ip ospf network
ip ospf priority 0
frame-relay map ip 10.12.3.1 201 broadcast
end
wr

==================================

R3ena
conf t
router ospf 100
net 10.12.3.0 0.0.0.255 area 0
net 10.35.6.0 0.0.0.255 area 356
net 3.3.3.3 0.0.0.255
exit

inter se 0/0.1
no ip ospf network point-to-multipoint
ip ospf priority0
frame-relay map ip 10.12.3.1 301 broadcast

inter se 0/1.1
ip ospf network point-to-multipoint
end
wr

==================================

R4

ena
conf t
router ospf 100
net...