OSPF Filtering – Distribute List

CONFIG

R2(config)#do sh ip route ospf

1.0.0.0/32 is subnetted, 1 subnets

O 1.1.1.1 [110/2] via 12.12.12.1, 03:17:26, FastEthernet0/0

3.0.0.0/32 is subnetted, 1 subnets

O 3.3.3.3 [110/2] via 23.23.23.3, 03:16:50, GigabitEthernet1/0

33.0.0.0/32 is subnetted, 3 subnets

O E1 33.33.33.1 [110/21] via 23.23.23.3, 00:04:47, GigabitEthernet1/0

O E1 33.33.33.2 [110/21] via 23.23.23.3, 00:04:47, GigabitEthernet1/0

O E1 33.33.33.3 [110/21] via 23.23.23.3, 00:04:47, GigabitEthernet1/0

100.0.0.0/32 is subnetted, 7 subnets

O IA 100.100.100.1 [110/2] via 12.12.12.1, 03:17:26, FastEthernet0/0

O IA 100.100.100.2 [110/2] via 12.12.12.1, 03:17:26, FastEthernet0/0

O IA 100.100.100.3 [110/2] via 12.12.12.1, 03:17:26, FastEthernet0/0

O E2 100.100.100.4 [110/20] via 12.12.12.1, 03:17:26, FastEthernet0/0

O E2 100.100.100.5 [110/20] via 12.12.12.1, 03:17:26, FastEthernet0/0

O E2 100.100.100.6 [110/20] via 12.12.12.1, 03:17:26, FastEthernet0/0

O E2 100.100.100.7 [110/20] via 12.12.12.1, 03:17:26, FastEthernet0/0

Konfigurasikan Filtering Distribute List Agar yang Boleh Lewat Hanya IP Genap

Saja,.

R2(config)#access-list 1 permit 0.0.0.0 255.255.255.254

R2(config)#router ospf 2

R2(config-router)#distribute-list 1 in

R2(config-router)#exit

Cek kembali

R2(config)#do sh ip route ospf

33.0.0.0/32 is subnetted, 1 subnets

O E1 33.33.33.2 [110/21] via 23.23.23.3, 00:01:20, GigabitEthernet1/0

100.0.0.0/32 is subnetted, 3 subnets

O IA 100.100.100.2 [110/2] via 12.12.12.1, 00:01:20, FastEthernet0/0

O E2 100.100.100.4 [110/20] via 12.12.12.1, 00:01:20, FastEthernet0/0

O E2 100.100.100.6 [110/20] via 12.12.12.1, 00:01:20, FastEthernet0/0

diperhatikan ospf databasenya yang tidak berubah meski sudah di filter,

hal tersebut dikarenakan pada OSPF semua

router dlam satu area memiliki database yang sama

R1(config)#do sh ip ospf database

OSPF Router with ID (1.1.1.1) (Process ID 1)

Router Link States (Area 0)

Link ID ADV Router Age Seq# Checksum Link count

1.1.1.1 1.1.1.1 1809 0x8000001D 0x00901B 2

2.2.2.2 2.2.2.2 778 0x8000001B 0x002596 1

Net Link States (Area 0)

Link ID ADV Router Age Seq# Checksum

12.12.12.2 2.2.2.2 1533 0x80000018 0x00E503

Summary Net Link States (Area 0)

Link ID ADV Router Age Seq# Checksum

2.2.2.2 2.2.2.2 1285 0x80000019 0x00CA49

3.3.3.3 2.2.2.2 526 0x80000007 0x00CA56

23.23.23.0 2.2.2.2 526 0x80000007 0x000CDC

100.100.100.1 1.1.1.1 1809 0x80000019 0x001DD4

100.100.100.2 1.1.1.1 1809 0x80000019 0x0013DD

100.100.100.3 1.1.1.1 1809 0x80000019 0x0009E6

Summary ASB Link States (Area 0)

Link ID ADV Router Age Seq# Checksum

3.3.3.3 2.2.2.2 526 0x80000007 0x00B26E

Router Link States (Area 100)

Link ID ADV Router Age Seq# Checksum Link count

1.1.1.1 1.1.1.1 1809 0x8000001C 0x00FF5C 3

Summary Net Link States (Area 100)

Link ID ADV Router Age Seq# Checksum

1.1.1.1 1.1.1.1 1809 0x80000019 0x001705

2.2.2.2 1.1.1.1 1809 0x80000018 0x00F423

3.3.3.3 1.1.1.1 552 0x80000007 0x00F231

12.12.12.0 1.1.1.1 1809 0x80000018 0x009567

23.23.23.0 1.1.1.1 552 0x80000007 0x0034B7

Summary ASB Link States (Area 100)

Link ID ADV Router Age Seq# Checksum

3.3.3.3 1.1.1.1 552 0x80000007 0x00DA49

Type-5 AS External Link States

Link ID ADV Router Age Seq# Checksum Tag

33.33.33.1 3.3.3.3 1105 0x80000002 0x00555A 0

33.33.33.2 3.3.3.3 1105 0x80000002 0x004B63 0

33.33.33.3 3.3.3.3 1105 0x80000002 0x00416C 0

100.100.100.4 1.1.1.1 1809 0x80000019 0x0053FF 0

100.100.100.5 1.1.1.1 1809 0x80000019 0x004909 0

100.100.100.6 1.1.1.1 1809 0x80000019 0x003F12 0

100.100.100.7 1.1.1.1 1809 0x80000019 0x00351B 0

R3(config)#do 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 2.2.2.2 812 0x80000024 0x003422 2

3.3.3.3 3.3.3.3 634 0x80000021 0x002D1E 2

Net Link States (Area 1)

Link ID ADV Router Age Seq# Checksum

23.23.23.3 3.3.3.3 634 0x80000013 0x008E31

Summary Net Link States (Area 1)

Link ID ADV Router Age Seq# Checksum

1.1.1.1 2.2.2.2 812 0x80000008 0x002503

12.12.12.0 2.2.2.2 812 0x80000008 0x009771

100.100.100.2 2.2.2.2 812 0x80000008 0x0021DB

Summary ASB Link States (Area 1)

Link ID ADV Router Age Seq# Checksum

1.1.1.1 2.2.2.2 812 0x80000007 0x000F1A

Type-5 AS External Link States

Link ID ADV Router Age Seq# Checksum Tag

33.33.33.1 3.3.3.3 1137 0x80000002 0x00555A 0

33.33.33.2 3.3.3.3 1137 0x80000002 0x004B63 0

33.33.33.3 3.3.3.3 1137 0x80000002 0x00416C 0

100.100.100.4 1.1.1.1 1845 0x80000019 0x0053FF 0

100.100.100.5 1.1.1.1 1845 0x80000019 0x004909 0

100.100.100.6 1.1.1.1 1845 0x80000019 0x003F12 0

100.000.100.7 1.1.1.1 1845 0x80000019 0x00351B 0

Semua router dalam satu area yang sama memiliki OSPF database YANG SAMA

CEK DENGAN DO SH IP ROUTE OSPF

R3(config)#do sh ip route ospf

1.0.0.0/32 is subnetted, 1 subnets

O IA 1.1.1.1 [110/3] via 23.23.23.2, 03:34:02, GigabitEthernet1/0

2.0.0.0/32 is subnetted, 1 subnets

O 2.2.2.2 [110/2] via 23.23.23.2, 03:34:02, GigabitEthernet1/0

12.0.0.0/24 is subnetted, 1 subnets

O IA 12.12.12.0 [110/2] via 23.23.23.2, 03:34:02, GigabitEthernet1/0

100.0.0.0/32 is subnetted, 5 subnets

O IA 100.100.100.2 [110/3] via 23.23.23.2, 03:34:02, GigabitEthernet1/0

O E2 100.100.100.4 [110/20] via 23.23.23.2, 03:33:52, GigabitEthernet1/0

O E2 100.100.100.5 [110/20] via 23.23.23.2, 03:33:52, GigabitEthernet1/0

O E2 100.100.100.6 [110/20] via 23.23.23.2, 03:33:52, GigabitEthernet1/0

O E2 100.100.100.7 [110/20] via 23.23.23.2, 03:33:52, GigabitEthernet1/0

SELESAI

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