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

spanning-tree mode pvst

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

line con 0

line aux 0

line vty 0 4

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

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

spanning-tree mode pvst

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

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

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#

Multi-Area OSPF configuration

* Topology:

* Configuration:

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