Multi-Area OSPF configuration
* Topology:
* Configuration:
- R1 configuration:
R1#sh run
Building configuration…
Current configuration : 731 bytes
!
version 15.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
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!
!
spanning-tree mode pvst
!
!
!
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!
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interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface GigabitEthernet0/0/0
ip address 10.1.1.1 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0/0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Vlan1
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
network 10.1.1.1 0.0.0.0 area 1
network 1.1.1.1 0.0.0.0 area 1
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
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line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end
- R2 configuration:
R2#sh run
Building configuration…
Current configuration : 778 bytes
!
version 15.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R2
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface GigabitEthernet0/0/0
ip address 10.1.1.2 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0/0/1
ip address 10.1.2.1 255.255.255.0
duplex auto
speed auto
!
interface Vlan1
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
network 2.2.2.2 0.0.0.0 area 0
network 10.1.2.0 0.0.0.255 area 0
network 10.1.1.0 0.0.0.255 area 1
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end
- R3 configuration:
R3#sh run
Building configuration…
Current configuration : 776 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R3
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX15242C77
!
!
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!
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spanning-tree mode pvst
!
!
!
!
!
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interface Loopback0
ip address 3.3.3.3 255.255.255.255
ip ospf 1 area 0
!
interface GigabitEthernet0/0
ip address 10.1.3.1 255.255.255.0
ip ospf 1 area 2
duplex auto
speed auto
!
interface GigabitEthernet0/1
ip address 10.1.2.2 255.255.255.0
ip ospf 1 area 0
duplex auto
speed auto
!
interface Vlan1
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end
R3#
- R4 configuration:
R3 configuratR4#sh run
Building configuration…
Current configuration : 752 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R4
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX152462Z0
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface Loopback0
ip address 4.4.4.4 255.255.255.255
!
interface GigabitEthernet0/0
ip address 10.1.3.2 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Vlan1
no ip address
shutdown
!
router ospf 1
log-adjacency-changes
network 0.0.0.0 255.255.255.255 area 2
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end
- Verification:
R1#sh ip rou
R1#sh ip route
Codes: L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
* – candidate default, U – per-user static route, o – ODR
P – periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1/32 is directly connected, Loopback0
2.0.0.0/32 is subnetted, 1 subnets
O IA 2.2.2.2/32 [110/2] via 10.1.1.2, 00:23:39, GigabitEthernet0/0/0
3.0.0.0/32 is subnetted, 1 subnets
O IA 3.3.3.3/32 [110/3] via 10.1.1.2, 00:23:39, GigabitEthernet0/0/0
4.0.0.0/32 is subnetted, 1 subnets
O IA 4.4.4.4/32 [110/4] via 10.1.1.2, 00:23:39, GigabitEthernet0/0/0
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 10.1.1.0/24 is directly connected, GigabitEthernet0/0/0
L 10.1.1.1/32 is directly connected, GigabitEthernet0/0/0
O IA 10.1.2.0/24 [110/2] via 10.1.1.2, 00:23:39, GigabitEthernet0/0/0
O IA 10.1.3.0/24 [110/3] via 10.1.1.2, 00:23:39, GigabitEthernet0/0/0
- R2 ip route:
R2#sh ip route
Codes: L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
* – candidate default, U – per-user static route, o – ODR
P – periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1/32 [110/2] via 10.1.1.1, 00:31:51, GigabitEthernet0/0/0
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2/32 is directly connected, Loopback0
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3/32 [110/2] via 10.1.2.2, 00:31:46, GigabitEthernet0/0/1
4.0.0.0/32 is subnetted, 1 subnets
O IA 4.4.4.4/32 [110/3] via 10.1.2.2, 00:31:46, GigabitEthernet0/0/1
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
C 10.1.1.0/24 is directly connected, GigabitEthernet0/0/0
L 10.1.1.2/32 is directly connected, GigabitEthernet0/0/0
C 10.1.2.0/24 is directly connected, GigabitEthernet0/0/1
L 10.1.2.1/32 is directly connected, GigabitEthernet0/0/1
O IA 10.1.3.0/24 [110/2] via 10.1.2.2, 00:31:46, GigabitEthernet0/0/1
- R3 ip route:
R3#sh ip route
Codes: L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
* – candidate default, U – per-user static route, o – ODR
P – periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
O IA 1.1.1.1/32 [110/3] via 10.1.2.1, 00:32:27, GigabitEthernet0/1
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2/32 [110/2] via 10.1.2.1, 00:32:27, GigabitEthernet0/1
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3/32 is directly connected, Loopback0
4.0.0.0/32 is subnetted, 1 subnets
O 4.4.4.4/32 [110/2] via 10.1.3.2, 00:32:32, GigabitEthernet0/0
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
O IA 10.1.1.0/24 [110/2] via 10.1.2.1, 00:32:27, GigabitEthernet0/1
C 10.1.2.0/24 is directly connected, GigabitEthernet0/1
L 10.1.2.2/32 is directly connected, GigabitEthernet0/1
C 10.1.3.0/24 is directly connected, GigabitEthernet0/0
L 10.1.3.1/32 is directly connected, GigabitEthernet0/0
R4 ip route:
R4#sh ip route
Codes: L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
* – candidate default, U – per-user static route, o – ODR
P – periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
O IA 1.1.1.1/32 [110/4] via 10.1.3.1, 00:33:08, GigabitEthernet0/0
2.0.0.0/32 is subnetted, 1 subnets
O IA 2.2.2.2/32 [110/3] via 10.1.3.1, 00:33:08, GigabitEthernet0/0
3.0.0.0/32 is subnetted, 1 subnets
O IA 3.3.3.3/32 [110/2] via 10.1.3.1, 00:33:08, GigabitEthernet0/0
4.0.0.0/32 is subnetted, 1 subnets
C 4.4.4.4/32 is directly connected, Loopback0
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
O IA 10.1.1.0/24 [110/3] via 10.1.3.1, 00:33:08, GigabitEthernet0/0
O IA 10.1.2.0/24 [110/2] via 10.1.3.1, 00:33:08, GigabitEthernet0/0
C 10.1.3.0/24 is directly connected, GigabitEthernet0/0
L 10.1.3.2/32 is directly connected, GigabitEthernet0/0
R4#
