Day 3 - OSPF Standar Area

Lab kali ini kita akan membahas bagaimana cara konfigurasi OSPF standar Area.

Lab 3 - OSPF Standar Area


Topologi yang digunakan adalah sbb :



Skenarionya adalah bahwa all router dapat menerima routing dari router yang lain dengan menggunakan routing OSPF.

Konfigurasi R1 :

interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface Loopback1
 ip address 100.100.100.1 255.255.255.255
!
interface Loopback2
 ip address 100.100.100.2 255.255.255.255
!
interface Loopback3
 ip address 100.100.100.3 255.255.255.255
!
interface Loopback4
 ip address 100.100.100.4 255.255.255.255
!
interface Loopback5
 ip address 100.100.100.5 255.255.255.255
!
interface Loopback6
 ip address 100.100.100.6 255.255.255.255
!
interface Loopback7
 ip address 100.100.100.7 255.255.255.255
!
interface Serial0/0
 ip address 12.12.12.1 255.255.255.0
!
router eigrp 1
 network 100.100.100.4 0.0.0.0
 network 100.100.100.5 0.0.0.0
 network 100.100.100.6 0.0.0.0
 network 100.100.100.7 0.0.0.0
!

router ospf 1
 router-id 1.1.1.1
 log-adjacency-changes
 redistribute eigrp 1 subnets
 network 1.1.1.1 0.0.0.0 area 0
 network 12.12.12.1 0.0.0.0 area 0
 network 100.100.100.1 0.0.0.0 area 100
 network 100.100.100.2 0.0.0.0 area 100
 network 100.100.100.3 0.0.0.0 area 100


Konfigurasi R2 :

interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
 ip address 23.23.23.2 255.255.255.0
!
interface Serial0/0
 ip address 12.12.12.2 255.255.255.0
!

router ospf 2
 router-id 2.2.2.2
 log-adjacency-changes
 network 2.2.2.2 0.0.0.0 area 1
 network 12.12.12.2 0.0.0.0 area 0
 network 23.23.23.2 0.0.0.0 area 1

Konfigurasi R3 :

interface Loopback0
 ip address 3.3.3.3 255.255.255.255
!
interface FastEthernet0/0
 ip address 23.23.23.3 255.255.255.0
!

router ospf 3
 router-id 3.3.3.3
 log-adjacency-changes
 network 3.3.3.3 0.0.0.0 area 1
 network 23.23.23.3 0.0.0.0 area 1

Hasil cek routing table pada all router :

R1#sh ip route
Gateway of last resort is not set

     1.0.0.0/32 is subnetted, 1 subnets
C       1.1.1.1 is directly connected, Loopback0
     2.0.0.0/32 is subnetted, 1 subnets
O IA    2.2.2.2 [110/65] via 12.12.12.2, 00:13:56, Serial0/0
     100.0.0.0/32 is subnetted, 7 subnets
C       100.100.100.4 is directly connected, Loopback4
C       100.100.100.5 is directly connected, Loopback5
C       100.100.100.6 is directly connected, Loopback6
C       100.100.100.7 is directly connected, Loopback7
C       100.100.100.1 is directly connected, Loopback1
C       100.100.100.2 is directly connected, Loopback2
C       100.100.100.3 is directly connected, Loopback3
     3.0.0.0/32 is subnetted, 1 subnets
O IA    3.3.3.3 [110/75] via 12.12.12.2, 00:13:24, Serial0/0
     23.0.0.0/24 is subnetted, 1 subnets
O IA    23.23.23.0 [110/74] via 12.12.12.2, 00:13:58, Serial0/0
     12.0.0.0/24 is subnetted, 1 subnets
C       12.12.12.0 is directly connected, Serial0/0

R2#sh ip route
Gateway of last resort is not set

     1.0.0.0/32 is subnetted, 1 subnets
O       1.1.1.1 [110/65] via 12.12.12.1, 00:14:19, Serial0/0
     2.0.0.0/32 is subnetted, 1 subnets
C       2.2.2.2 is directly connected, Loopback0
     100.0.0.0/32 is subnetted, 7 subnets
O E2    100.100.100.4 [110/20] via 12.12.12.1, 00:14:19, Serial0/0
O E2    100.100.100.5 [110/20] via 12.12.12.1, 00:14:19, Serial0/0
O E2    100.100.100.6 [110/20] via 12.12.12.1, 00:14:19, Serial0/0
O E2    100.100.100.7 [110/20] via 12.12.12.1, 00:14:19, Serial0/0
O IA    100.100.100.1 [110/65] via 12.12.12.1, 00:14:20, Serial0/0
O IA    100.100.100.2 [110/65] via 12.12.12.1, 00:14:20, Serial0/0
O IA    100.100.100.3 [110/65] via 12.12.12.1, 00:14:20, Serial0/0
     3.0.0.0/32 is subnetted, 1 subnets
O       3.3.3.3 [110/11] via 23.23.23.3, 00:13:46, FastEthernet0/0
     23.0.0.0/24 is subnetted, 1 subnets
C       23.23.23.0 is directly connected, FastEthernet0/0
     12.0.0.0/24 is subnetted, 1 subnets
C       12.12.12.0 is directly connected, Serial0/0

R3#sh ip route
Gateway of last resort is not set

     1.0.0.0/32 is subnetted, 1 subnets
O IA    1.1.1.1 [110/75] via 23.23.23.2, 00:14:01, FastEthernet0/0
     2.0.0.0/32 is subnetted, 1 subnets
O       2.2.2.2 [110/11] via 23.23.23.2, 00:14:01, FastEthernet0/0
     100.0.0.0/32 is subnetted, 7 subnets
O E2    100.100.100.4 [110/20] via 23.23.23.2, 00:14:01, FastEthernet0/0
O E2    100.100.100.5 [110/20] via 23.23.23.2, 00:14:01, FastEthernet0/0
O E2    100.100.100.6 [110/20] via 23.23.23.2, 00:14:01, FastEthernet0/0
O E2    100.100.100.7 [110/20] via 23.23.23.2, 00:14:02, FastEthernet0/0
O IA    100.100.100.1 [110/75] via 23.23.23.2, 00:14:02, FastEthernet0/0
O IA    100.100.100.2 [110/75] via 23.23.23.2, 00:14:02, FastEthernet0/0
O IA    100.100.100.3 [110/75] via 23.23.23.2, 00:14:02, FastEthernet0/0
     3.0.0.0/32 is subnetted, 1 subnets
C       3.3.3.3 is directly connected, Loopback0
     23.0.0.0/24 is subnetted, 1 subnets
C       23.23.23.0 is directly connected, FastEthernet0/0
     12.0.0.0/24 is subnetted, 1 subnets
O IA    12.12.12.0 [110/74] via 23.23.23.2, 00:14:04, FastEthernet0/0

Terlihat bahwa pada masing - masing router sudah menerima routing dari router lain secara lengkap.


Kita coba cek ip ospf database di router R3 sebagai referensi :
R3#sh ip ospf database

            OSPF Router with ID (3.3.3.3) (Process ID 3)

                Router Link States (Area 1)

Link ID         ADV Router      Age         Seq#       Checksum Link count
2.2.2.2         2.2.2.2         928         0x80000003 0x00CAA3 23.3.3.3         3.3.3.3         927         0x80000003 0x00DB86 2

                Net Link States (Area 1)

Link ID         ADV Router      Age         Seq#       Checksum
23.23.23.3      3.3.3.3         927         0x80000001 0x00B21F

                Summary Net Link States (Area 1)

Link ID         ADV Router      Age         Seq#       Checksum
1.1.1.1         2.2.2.2         958         0x80000001 0x00AB44
12.12.12.0      2.2.2.2         968         0x80000001 0x001EB2
100.100.100.1   2.2.2.2         958         0x80000001 0x00B114
100.100.100.2   2.2.2.2         958         0x80000001 0x00A71D
100.100.100.3   2.2.2.2         958         0x80000001 0x009D26

                Summary ASB Link States (Area 1)

Link ID         ADV Router      Age         Seq#       Checksum
1.1.1.1         2.2.2.2         958         0x80000001 0x00935C

                Type-5 AS External Link States

Link ID         ADV Router      Age         Seq#       Checksum Tag
100.100.100.4   1.1.1.1         973         0x80000001 0x0083E7 0
100.100.100.5   1.1.1.1         973         0x80000001 0x0079F0 0
100.100.100.6   1.1.1.1         973         0x80000001 0x006FF9 0
100.100.100.7   1.1.1.1         973         0x80000001 0x006503 0