Konfigurasi Multi Area OSPF dengan Packet Tracer
Pada kesempatan ini saya akan mencoba memberikan pemahaman tentang konsep Multi Area OSPF melalui simulator jaringan Packet tracer (untuk lebih jelas silahkan lihat link ini). Saya mensimulasikan dengan tiga area routing OSPF yakni area 0, area 1, dan area 3. Masing-masing area saling terhubung dengan area 0 yang bertindak sebagai backbone area. Untuk lebih mengerti silahkan ditelusuri pemahamannya dibawah ini.
Topologi Multi Area OSPF
# R5
interface FastEthernet0/0
ip address 10.10.10.2 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 20.20.20.1 255.255.255.252
duplex auto
speed auto
!
router ospf 10
log-adjacency-changes
network 10.10.10.0 0.0.0.3 area 1
network 20.20.20.0 0.0.0.3 area 1
!
# R6
interface FastEthernet0/0
ip address 20.20.20.2 255.255.255.252
duplex auto
speed auto
!
interface Serial2/0
ip address 30.30.30.2 255.255.255.252
no keepalive
clock rate 64000
!
interface Serial3/0
ip address 40.40.40.1 255.255.255.252
no keepalive
clock rate 64000
!
router ospf 10
log-adjacency-changes
network 30.30.30.0 0.0.0.3 area 0
network 40.40.40.0 0.0.0.3 area 0
network 20.20.20.0 0.0.0.3 area 1
# R8
interface Serial2/0
ip address 30.30.30.2 255.255.255.252
no keepalive
!
interface Serial3/0
ip address 50.50.50.1 255.255.255.252
no keepalive
clock rate 64000
!
router ospf 10
log-adjacency-changes
network 30.30.30.0 0.0.0.3 area 0
network 50.50.50.0 0.0.0.3 area 0
# R7
interface Serial2/0
ip address 40.40.40.2 255.255.255.252
no keepalive
!
interface Serial3/0
ip address 60.60.60.1 255.255.255.252
no keepalive
clock rate 64000
!
router ospf 10
log-adjacency-changes
network 40.40.40.0 0.0.0.3 area 0
network 60.60.60.0 0.0.0.3 area 0
# R9
interface Serial2/0
ip address 60.60.60.2 255.255.255.252
no keepalive
!
interface Serial3/0
ip address 70.70.70.1 255.255.255.252
no keepalive
clock rate 64000
!
router ospf 10
log-adjacency-changes
network 70.70.70.0 0.0.0.3 area 0
network 60.60.60.0 0.0.0.3 area 0
!
# R10
interface FastEthernet0/0
ip address 80.80.80.1 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 90.90.90.1 255.255.255.252
duplex auto
speed auto
!
interface Serial2/0
ip address 50.50.50.2 255.255.255.252
no keepalive
!
interface Serial3/0
ip address 70.70.70.2 255.255.255.252
no keepalive
!
router ospf 10
log-adjacency-changes
network 50.50.50.0 0.0.0.3 area 0
network 70.70.70.0 0.0.0.3 area 0
network 80.80.80.0 0.0.0.3 area 3
network 90.90.90.0 0.0.0.3 area 3
!
# R11
interface FastEthernet0/0
ip address 90.90.90.2 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 170.160.60.2 255.255.255.252
duplex auto
speed auto
!
router ospf 10
log-adjacency-changes
network 170.160.60.0 0.0.0.3 area 3
network 90.90.90.0 0.0.0.3 area 3
!
# R12
interface FastEthernet0/0
ip address 170.160.10.2 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 170.160.60.1 255.255.255.252
duplex auto
speed auto
!
router ospf 10
log-adjacency-changes
network 170.160.10.0 0.0.0.3 area 3
network 170.160.60.0 0.0.0.3 area 3
!
# R13
interface FastEthernet0/0
ip address 80.80.80.2 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 170.160.10.1 255.255.255.252
duplex auto
speed auto
!
router ospf 10
log-adjacency-changes
network 170.160.10.0 0.0.0.3 area 3
network 80.80.80.0 0.0.0.3 area 3
!
# R14
interface FastEthernet0/0
ip address 10.10.10.1 255.255.255.252
duplex auto
speed auto
!
router ospf 10
log-adjacency-changes
network 10.10.10.0 0.0.0.3 area 1
!
Coba lakukan pemeriksaan terhadap masing-masing router untuk memastikan tiap-tiap router berada pada area nya.
Gunakan perintah show ip ospf database untuk melihat area yang ada pada topologi jaringan diatas,
Tabel Routing # R6
Router#sh ip ospf database
OSPF Router with ID (40.40.40.1) (Process ID 10)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
40.40.40.1 40.40.40.1 1522 0×80000010 0x0090a8 4
60.60.60.1 60.60.60.1 1664 0x8000000d 0x00f901 4
50.50.50.1 50.50.50.1 1626 0x8000000d 0x00f901 4
70.70.70.1 70.70.70.1 1609 0x8000000d 0x00f901 4
90.90.90.1 90.90.90.1 1414 0×80000012 0×007647 4
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
20.20.20.2 40.40.40.1 1499 0x8000000a 0x00a120
80.80.80.1 90.90.90.1 1328 0x8000000a 0x00429a
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
20.20.20.0 40.40.40.1 1517 0×80000011 0x00d0d2
10.10.10.0 40.40.40.1 1457 0×80000012 0x00427d
80.80.80.0 90.90.90.1 1316 0×80000024 0x008fbe
90.90.90.0 90.90.90.1 1299 0×80000025 0x00240b
170.160.60.0 90.90.90.1 1294 0×80000026 0x00189c
170.160.10.0 90.90.90.1 1256 0×80000027 0x003ca8
Router Link States (Area 1)
Link ID ADV Router Age Seq# Checksum Link count
40.40.40.1 40.40.40.1 1462 0x8000000a 0x004c93 1
20.20.20.1 20.20.20.1 1463 0x8000000c 0x00b551 2
10.10.10.1 10.10.10.1 1250 0x8000000b 0x00faff 1
Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
20.20.20.2 40.40.40.1 1462 0×80000009 0x0001be
10.10.10.2 20.20.20.1 1250 0x8000000a 0x0011aa
Summary Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
30.30.30.0 40.40.40.1 1517 0×80000050 0x00a880
40.40.40.0 40.40.40.1 1517 0×80000051 0x003dcc
50.50.50.0 40.40.40.1 1517 0×80000052 0×005456
60.60.60.0 40.40.40.1 1517 0×80000053 0x00e8a2
70.70.70.0 40.40.40.1 1517 0×80000054 0x00ff2c
80.80.80.0 40.40.40.1 1310 0×80000055 0×001136
90.90.90.0 40.40.40.1 1294 0×80000056 0x00a582
170.160.60.0 40.40.40.1 1284 0×80000057 0×009914
170.160.10.0 40.40.40.1 1251 0×80000058 0x00bf1e
Tabel Routing # R10
Router#sh ip ospf database
OSPF Router with ID (90.90.90.1) (Process ID 10)
Router Link States (Area 0)
Link ID ADV Router Age Seq# Checksum Link count
90.90.90.1 90.90.90.1 1474 0×80000012 0×007647 4
60.60.60.1 60.60.60.1 1725 0x8000000d 0x00f901 4
50.50.50.1 50.50.50.1 1686 0x8000000d 0x00f901 4
70.70.70.1 70.70.70.1 1669 0x8000000d 0x00f901 4
40.40.40.1 40.40.40.1 1583 0×80000010 0x0090a8 4
Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
80.80.80.1 90.90.90.1 1388 0x8000000a 0x00429a
20.20.20.2 40.40.40.1 1560 0x8000000a 0x00a120
Summary Net Link States (Area 0)
Link ID ADV Router Age Seq# Checksum
80.80.80.0 90.90.90.1 1376 0×80000024 0x008fbe
90.90.90.0 90.90.90.1 1359 0×80000025 0x00240b
170.160.60.0 90.90.90.1 1354 0×80000026 0x00189c
170.160.10.0 90.90.90.1 1316 0×80000027 0x003ca8
20.20.20.0 40.40.40.1 1578 0×80000011 0x00d0d2
10.10.10.0 40.40.40.1 1518 0×80000012 0x00427d
Router Link States (Area 1)
Link ID ADV Router Age Seq# Checksum Link count
90.90.90.1 90.90.90.1 1392 0x8000000c 0x0051eb 0
Summary Net Link States (Area 1)
Link ID ADV Router Age Seq# Checksum
50.50.50.0 90.90.90.1 1472 0x8000005a 0x00133c
70.70.70.0 90.90.90.1 1472 0x8000005b 0x003ed3
30.30.30.0 90.90.90.1 1472 0x8000005c 0x0064e4
60.60.60.0 90.90.90.1 1472 0x8000005d 0x0026c7
40.40.40.0 90.90.90.1 1472 0x8000005e 0x007b6d
20.20.20.0 90.90.90.1 1472 0x8000005f 0x00d191
10.10.10.0 90.90.90.1 1472 0×80000060 0x00433c
80.80.80.0 90.90.90.1 1379 0×80000061 0x0050dc
90.90.90.0 90.90.90.1 1362 0×80000062 0x00e429
170.160.60.0 90.90.90.1 1357 0×80000063 0x00d8ba
170.160.10.0 90.90.90.1 1319 0×80000064 0x00fcc6
Router Link States (Area 3)
Link ID ADV Router Age Seq# Checksum Link count
90.90.90.1 90.90.90.1 1326 0x8000000d 0x00e134 2
170.160.60.2 170.160.60.2 1368 0x8000000d 0x008d68 2
170.160.60.1 170.160.60.1 1361 0x8000000d 0x00faff 2
170.160.10.1 170.160.10.1 1335 0x8000000d 0x00ab50 2
Net Link States (Area 3)
Link ID ADV Router Age Seq# Checksum
170.160.60.1 170.160.60.1 1508 0×80000013 0×006590
90.90.90.2 170.160.60.2 1368 0×80000009 0×003561
170.160.10.2 170.160.60.1 1361 0×80000014 0x003c48
80.80.80.2 170.160.10.1 1335 0×80000009 0x00646b
Summary Net Link States (Area 3)
Link ID ADV Router Age Seq# Checksum
50.50.50.0 90.90.90.1 1382 0×80000039 0x00322d
70.70.70.0 90.90.90.1 1382 0x8000003a 0x005dc4
30.30.30.0 90.90.90.1 1382 0x8000003b 0x0083d5
60.60.60.0 90.90.90.1 1382 0x8000003c 0x0046b7
40.40.40.0 90.90.90.1 1382 0x8000003d 0x009a5e
20.20.20.0 90.90.90.1 1382 0x8000003e 0x00f082
10.10.10.0 90.90.90.1 1382 0x8000003f 0x00622d
Hasil yang didapatkan pada tabel routing router ABR diatas telah menunjukkan informasi rute-rute yang berada pada ketiga area routing OSPF, untuk lebih mendalam silahkan coba simulasikan sendiri.
