Open Shortest Path First (OSPF) adalah protokol gateway interior (IGP) yang digunakan secara luas untuk melakukan routing paket-paket IP dalam satu sistem otonom (AS) dalam jaringan IP. OSPF dirancang untuk menghitung jalur terpendek secara efisien untuk paket data yang bergerak dari sumber ke tujuan.
¶ Syntax
¶ Konfigurasi OSPF
| Command | Description |
|---|---|
R1(config)#router ospf [PID] |
Process ID [PID] (1 - 65535) |
R1(config-router)#router-id [a.b.c.d] |
menual mengatur router ID, dengan IPv4 format. |
R1(config-router)#network [network-address] [wildcard-mask] area [area id] |
Untuk semua network yang terhubung langsung. Area ID 0 - 4294967295 |
area iddapat ditulis dengan format ip adress
ProTip: Begaimana cara mengetahui network yang terhubung langsung dengan router?
dapat diketahu denganR1(config)#do show ip route concommand.
¶ OSPF verification
| Command | Description |
|---|---|
R1#show ip protocols |
PID, router ID, advertised networks, neighbors dan administrative distance. |
R1#show ip route |
|
R1#show ip ospf neighbor |
lis OSPF neighbor |
R1#show ip ospf |
identify the PID, router ID, area information, dan waktu |
R1#show ip ospf interface brief |
|
R1#show ip ospf interface |
list ospf interfaces |
R1#show ip ospf interface [int-id] |
Lebih detail |
router ospf 1
network X.X.X.0 0.0.0.255 area 0
network Y.Y.Y.0 0.0.0.3 area 0
¶ Topologi
¶ Konfigurasi
¶ Konfigurasi IP
Setting IP address pada Interface
R1(config)#interface FastEthernet0/0
R1(config-if)#ip address 192.168.1.1 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#exit
R1(config)#interface Serial0/0/0
R1(config-if)#ip address 10.0.1.1 255.255.255.252
R1(config-if)#no shutdown
R1(config-if)#exit
R1(config)#interface Serial0/1/0
R1(config-if)#ip address 10.0.0.1 255.255.255.252
R1(config-if)#no shutdown
R1(config-if)#exit
R2(config)#interface FastEthernet0/0
R2(config-if)#ip address 192.168.2.1 255.255.255.0
R2(config-if)#no shutdown
R2(config-if)#exit
R2(config)#interface Serial0/0/0
R2(config-if)#ip address 10.0.2.1 255.255.255.252
R2(config-if)#no shutdown
R2(config-if)#exit
R2(config)#interface Serial0/1/0
R2(config-if)#ip address 10.0.0.2 255.255.255.252
R2(config-if)#no shutdown
R3(config)#interface FastEthernet0/0
R3(config-if)#ip address 192.168.3.1 255.255.255.0
R3(config-if)#no shutdown
R3(config-if)#exit
R3(config)#interface Serial0/0/0
R3(config-if)#ip address 10.0.2.2 255.255.255.252
R3(config-if)#no shutdown
R3(config-if)#exit
R3(config)#interface Serial0/1/0
R3(config-if)#ip address 10.0.1.2 255.255.255.252
R3(config-if)#no shutdown
| PC | IP Address | Subnet Mask | Gateway |
|---|---|---|---|
| PC1 | 192.168.1.2 | 255.255.255.0 | 192.168.1.1 |
| PC2 | 192.168.2.2 | 255.255.255.0 | 192.168.2.1 |
| PC3 | 192.168.3.2 | 255.255.255.0 | 192.168.3.1 |
¶ Konfigurasi Routing OSPF
¶ R1
R1(config)#router ospf 1
R1(config-router)#network 192.168.1.0 0.0.0.255 area 0
R1(config-router)#network 10.0.0.0 0.0.0.3 area 0
R1(config-router)#network 10.0.1.0 0.0.0.3 area 0
¶ R2
R2(config)#router ospf 1
R2(config-router)#network 192.168.2.0 0.0.0.255 area 0
R2(config-router)#network 10.0.0.0 0.0.0.3 area 0
R2(config-router)#network 10.0.2.0 0.0.0.3 area 0
¶ R3
R3(config)#router ospf 1
R3(config-router)#network 192.168.3.0 0.0.0.255 area 0
R3(config-router)#network 10.0.1.0 0.0.0.3 area 0
R3(config-router)#network 10.0.2.0 0.0.0.3 area 0
¶ Verify
R1#show ip route
Codes: C - connected, S - static, I - IGRP, 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
10.0.0.0/30 is subnetted, 3 subnets
C 10.0.0.0 is directly connected, Serial0/1/0
C 10.0.1.0 is directly connected, Serial0/0/0
O 10.0.2.0 [110/128] via 10.0.0.2, 00:02:20, Serial0/1/0
[110/128] via 10.0.1.2, 00:02:20, Serial0/0/0
C 192.168.1.0/24 is directly connected, FastEthernet0/0
O 192.168.2.0/24 [110/65] via 10.0.0.2, 00:04:16, Serial0/1/0
O 192.168.3.0/24 [110/65] via 10.0.1.2, 00:02:30, Serial0/0/0
R2#show ip route
Codes: C - connected, S - static, I - IGRP, 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
10.0.0.0/30 is subnetted, 3 subnets
C 10.0.0.0 is directly connected, Serial0/1/0
O 10.0.1.0 [110/128] via 10.0.0.1, 00:03:12, Serial0/1/0
[110/128] via 10.0.2.2, 00:03:12, Serial0/0/0
C 10.0.2.0 is directly connected, Serial0/0/0
O 192.168.1.0/24 [110/65] via 10.0.0.1, 00:05:08, Serial0/1/0
C 192.168.2.0/24 is directly connected, FastEthernet0/0
O 192.168.3.0/24 [110/65] via 10.0.2.2, 00:03:12, Serial0/0/0
R3#show ip route
Codes: C - connected, S - static, I - IGRP, 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
10.0.0.0/30 is subnetted, 3 subnets
O 10.0.0.0 [110/128] via 10.0.1.1, 00:03:44, Serial0/1/0
[110/128] via 10.0.2.1, 00:03:44, Serial0/0/0
C 10.0.1.0 is directly connected, Serial0/1/0
C 10.0.2.0 is directly connected, Serial0/0/0
O 192.168.1.0/24 [110/65] via 10.0.1.1, 00:03:54, Serial0/1/0
O 192.168.2.0/24 [110/65] via 10.0.2.1, 00:03:44, Serial0/0/0
C 192.168.3.0/24 is directly connected, FastEthernet0/0
C:\>ping 192.168.2.2
Pinging 192.168.2.2 with 32 bytes of data:
Reply from 192.168.2.2: bytes=32 time=23ms TTL=126
Reply from 192.168.2.2: bytes=32 time=32ms TTL=126
Reply from 192.168.2.2: bytes=32 time=22ms TTL=126
Reply from 192.168.2.2: bytes=32 time=31ms TTL=126
Ping statistics for 192.168.2.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 22ms, Maximum = 32ms, Average = 27ms
C:\>ping 192.168.3.2
Pinging 192.168.3.2 with 32 bytes of data:
Reply from 192.168.3.2: bytes=32 time=15ms TTL=126
Reply from 192.168.3.2: bytes=32 time=13ms TTL=126
Reply from 192.168.3.2: bytes=32 time=22ms TTL=126
Reply from 192.168.3.2: bytes=32 time=13ms TTL=126
Ping statistics for 192.168.3.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 13ms, Maximum = 22ms, Average = 15ms