OSPF configuration
R1 area 0
router ospf 1
router-id 1.1.1.1 =>router id need to be configure first or the highest ip address or loopback interface will be the router id
network 172.16.2.0 0.0.0.255 area 0
if the router id is not set and need to reconfigure
clear ip ospf processses command can help
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R4 area 1
router ospf 1
router-id 4.4.4.4
network 10.1.24.2 0.0.0.0 area 1
R2
router ospf 1
network 10.1.24.1 0.0.0.0 area 1
area 0 range 172.16.0.0 255.255.0.0
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R3 Area 2 Stub
router ospf 1
network 10.1.35.1 0.0.0.0 area 2
area 2 stub
R5
router ospf 1
router-id 5.5.5.5
network 10.1.35.2 0.0.0.0 area 2
network 10.1.56.1 0.0.0.0 area 2
area 2 stub
Stub area will filter external route adverstisement
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External Route rip
R1
router rip
ver 2
network 172.30.0.0
router ospf 1
redistribution rip metrcis 1000 metrics-type 2 subntes tag 150
- metrics-type 1 will increase number +1 when update route whiile type 2 is not
router rip
redistribution ospf 1 metrics 100
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R7 Area 3 totally stubby
router ospf 1
router-id 7.7.7.7
network 10.1.0.0 0.0.255.255 area 3
area 3 stub
R1
router ospf 1
network 10.1.17.1 0.0.0.0 area 3
area 3 stub no-summary ( add in no summary to make it become totally stubby area )
