IPv4 Routing with OSPF

Task - OSPFv2 LSAs (Summary and External LSAs)

All routers 1 through 10 have been pre-configured with IP addresses.
Configure OSPF Process-ID 1.
Use the network statement to activate OSPF.
All links on R1 belong to Area 1.
Link between R2 and R3 belongs to Area 0.
Link between R2 and R5 belongs to Area 0.
Link between R3 and R6 belongs to Area 0.
Link between R5 and R6 belongs to Area 0.
All links on R4 belong to Area 0.
All links on R7 and R8 belong to Area 3.
Create a new loopback Loopback1 on R9 with IP address as 9.9.9.9/32.
All links except Loopback1 on R9 belong to Area 3.
Loopback1 must be advertised in OSPF as a type-5 LSA.
All links on R10 belong to Area 2.
Loopback0 of R2, R3, R4, R5, and R6 belong to Area 0.
Verify the OSPF adjacency and the routing table.

Solutions:

R1:

router ospf 1
 network 0.0.0.0 255.255.255.255 area 1

R4:

router ospf 1
 network 0.0.0.0 255.255.255.255 area 0

R7:

router ospf 1
 network 0.0.0.0 255.255.255.255 area 3

R8:

router ospf 1
 network 0.0.0.0 255.255.255.255 area 3

R9:

interface Loopback1
 ip address 9.9.9.9 255.255.255.255

router ospf 1
 redistribute connected subnets
 network 172.16.0.0 0.0.255.255 area 3

R10:

router ospf 1
 network 0.0.0.0 255.255.255.255 area 2

R2:

router ospf 1
 network 172.16.12.0 0.0.0.255 area 1
 network 172.16.0.0 0.0.255.255 area 0

R3:

router ospf 1
 network 172.16.13.0 0.0.0.255 area 1
 network 172.16.103.0 0.0.0.255 area 2
 network 172.16.0.0 0.0.255.255 area 0

R5:

router ospf 1
 network 172.16.57.0 0.0.0.255 area 3
 network 172.16.0.0 0.0.255.255 area 0

R6:

router ospf 1
 network 172.16.68.0 0.0.0.255 area 3
 network 172.16.106.0 0.0.0.255 area 2
 network 172.16.0.0 0.0.255.255 area 0

Verification:

R1#sh ip ospf  neighbor 

Neighbor ID     Pri   State           Dead Time   Address         Interface
172.16.3.3        1   FULL/DR         00:00:38    172.16.13.3     GigabitEthernet0/1
172.16.2.2        1   FULL/DR         00:00:38    172.16.12.2     GigabitEthernet0/0

R1#sh ip ro ospf
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
       i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      9.0.0.0/32 is subnetted, 1 subnets
O E2     9.9.9.9 [110/20] via 172.16.13.3, 00:03:00, GigabitEthernet0/1
                 [110/20] via 172.16.12.2, 00:03:00, GigabitEthernet0/0
      172.16.0.0/16 is variably subnetted, 29 subnets, 2 masks
O IA     172.16.2.2/32 [110/2] via 172.16.12.2, 00:16:41, GigabitEthernet0/0
O IA     172.16.3.3/32 [110/2] via 172.16.13.3, 00:16:21, GigabitEthernet0/1
O IA     172.16.4.4/32 [110/3] via 172.16.13.3, 00:16:21, GigabitEthernet0/1
                       [110/3] via 172.16.12.2, 00:16:41, GigabitEthernet0/0
O IA     172.16.5.5/32 [110/3] via 172.16.12.2, 00:16:21, GigabitEthernet0/0
O IA     172.16.6.6/32 [110/3] via 172.16.13.3, 00:16:03, GigabitEthernet0/1
O IA     172.16.7.7/32 [110/4] via 172.16.12.2, 00:15:15, GigabitEthernet0/0
O IA     172.16.8.8/32 [110/4] via 172.16.13.3, 00:15:01, GigabitEthernet0/1
O IA     172.16.9.9/32 [110/5] via 172.16.13.3, 00:14:40, GigabitEthernet0/1
                       [110/5] via 172.16.12.2, 00:14:45, GigabitEthernet0/0
O IA     172.16.10.10/32 [110/3] via 172.16.13.3, 00:08:38, GigabitEthernet0/1
O IA     172.16.23.0/24 [110/2] via 172.16.13.3, 00:16:21, GigabitEthernet0/1
O IA     172.16.24.0/24 [110/2] via 172.16.12.2, 00:16:41, GigabitEthernet0/0
O IA     172.16.25.0/24 [110/2] via 172.16.12.2, 00:16:41, GigabitEthernet0/0
O IA     172.16.34.0/24 [110/2] via 172.16.13.3, 00:16:21, GigabitEthernet0/1
O IA     172.16.36.0/24 [110/2] via 172.16.13.3, 00:16:21, GigabitEthernet0/1
O IA     172.16.45.0/24 [110/3] via 172.16.13.3, 00:16:21, GigabitEthernet0/1
                        [110/3] via 172.16.12.2, 00:16:41, GigabitEthernet0/0
O IA     172.16.46.0/24 [110/3] via 172.16.13.3, 00:16:21, GigabitEthernet0/1
                        [110/3] via 172.16.12.2, 00:16:41, GigabitEthernet0/0
O IA     172.16.56.0/24 [110/3] via 172.16.13.3, 00:16:03, GigabitEthernet0/1
                        [110/3] via 172.16.12.2, 00:16:21, GigabitEthernet0/0
O IA     172.16.57.0/24 [110/3] via 172.16.12.2, 00:16:21, GigabitEthernet0/0
O IA     172.16.68.0/24 [110/3] via 172.16.13.3, 00:16:03, GigabitEthernet0/1
O IA     172.16.78.0/24 [110/4] via 172.16.13.3, 00:15:01, GigabitEthernet0/1
                        [110/4] via 172.16.12.2, 00:15:15, GigabitEthernet0/0
O IA     172.16.79.0/24 [110/4] via 172.16.12.2, 00:15:15, GigabitEthernet0/0
O IA     172.16.89.0/24 [110/4] via 172.16.13.3, 00:15:01, GigabitEthernet0/1
O IA     172.16.103.0/24 [110/2] via 172.16.13.3, 00:08:48, GigabitEthernet0/1
O IA     172.16.106.0/24 [110/3] via 172.16.13.3, 00:10:05, GigabitEthernet0/1

R1#sh ip ospf  database summary 

            OSPF  router with ID (172.16.1.1) (Process ID 1)

  Summary Net Link States (Area 1)

  LS age: 1097
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.2.2 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x3783
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 1 

  LS age: 1046
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.2.2 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0x3E78
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 3 

  LS age: 1056
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.3.3 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x3680
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 3 

  LS age: 1080
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.3.3 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0x15A1
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 1 

  LS age: 1056
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.4.4 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x179E
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 2 

  LS age: 1056
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.4.4 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0xAA9
  Length: 28
  network Mask: /32
        MTID: 0  Metric: 2 

  LS age: 1036
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.5.5 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x2B1
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 2 

  LS age: 1037
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.5.5 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0xFEB1
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 3 

  LS age: 1025
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.6.6 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0xF6B9
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 3 

  LS age: 1015
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.6.6 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000002
  Checksum: 0xDDD0
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 2 

  LS age: 968
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.7.7 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0xE1CC
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 3 

  LS age: 968
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.7.7 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0xDECC
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 4 

  LS age: 953
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.8.8 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0xD6D4
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 4 

  LS age: 953
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.8.8 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0xBFEA
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 3 

  LS age: 937
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.9.9 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0xC1E7
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 4 

  LS age: 932
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.9.9 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000002
  Checksum: 0xB2F3
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 4 

  LS age: 652
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.10.10 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0xACFA
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 4 

  LS age: 570
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.10.10 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000002
  Checksum: 0x891D
  Length: 28
  network Mask: /32
 MTID: 0  Metric: 2 

  LS age: 1046
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.23.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000002
  Checksum: 0x752F
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 1080
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.23.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0x564F
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 1 

  LS age: 1097
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.24.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x584E
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 1 

  LS age: 1056
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.24.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0x554E
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 2 

  LS age: 1097
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.25.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x4D58
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 1 

  LS age: 1046
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.25.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0x544D
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 1056
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.34.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0xF3A7
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 2 

  LS age: 1080
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.34.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0xDCBD
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 1 

  LS age: 1056
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.36.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0xE7B0
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 1080
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.36.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0xC6D1
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 1 

  LS age: 1056
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.45.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x7A16
  Length: 28
  network Mask: /24
        MTID: 0  Metric: 2 

  LS age: 1056
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.45.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0x6D21
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 2 

  LS age: 1056
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.46.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x6F20
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 2 

  LS age: 1056
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.46.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0x622B
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 2 

  LS age: 1036
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.56.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x184
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 2 

  LS age: 1015
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.56.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000002
  Checksum: 0xF190
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 2 

  LS age: 1036
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.57.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0xF58E
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 2 

  LS age: 1037
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.57.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0xF28E
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 1043
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.68.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x86F1
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 1033
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.68.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000002
  Checksum: 0x6D09
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 2 

  LS age: 986
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.78.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0x1856
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 971
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.78.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000002
  Checksum: 0x962
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 989
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.79.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0xD60
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 989
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.79.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0xA60
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 4 

  LS age: 974
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.89.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000001
  Checksum: 0xA8B9
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 4 

  LS age: 974
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.89.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000001
  Checksum: 0x91CF
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 601
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.103.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000003
  Checksum: 0xFF53
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 601
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.103.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000003
  Checksum: 0xDE74
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 1 

  LS age: 678
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.106.0 (summary network Number)
  Advertising Router: 172.16.2.2
  LS Seq Number: 80000005
  Checksum: 0xDA73
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 3 

  LS age: 681
  Options: (No TOS-capability, DC, Upward)
  LS Type: Summary Links(Network)
  Link State ID: 172.16.106.0 (summary network Number)
  Advertising Router: 172.16.3.3
  LS Seq Number: 80000006
  Checksum: 0xC18A
  Length: 28
  network Mask: /24
 MTID: 0  Metric: 2

R1#sh ip ospf  database external 

            OSPF  router with ID (172.16.1.1) (Process ID 1)

  Type-5 AS External Link States

  LS age: 357
  Options: (No TOS-capability, DC, Upward)
  LS Type: AS External Link
  Link State ID: 9.9.9.9 (External network Number )
  Advertising Router: 172.16.9.9
  LS Seq Number: 80000001
  Checksum: 0x406D
  Length: 36
  network Mask: /32
 Metric Type: 2 (Larger than any link state path)
 MTID: 0 
 Metric: 20 
 Forward Address: 0.0.0.0
 External Route Tag: 0