OSPF Lab 8 : OSPF Filtering – Distribute List
LAB 8
R1 telah membuat beberapa network /32 yang kemudian diadvertise ke OSPF dan EIGRP, selanjutnya route ganjil akan difilter oleh R2. Kemudian, kita lihat apakah ada pengaruhnya terhadap R3. Kondisi awal :
R2
R2(config)#do sh ip route ospf1.0.0.0/32 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
R2(config)#access-list 1 permit 0.0.0.0 255.255.255.254 Konfigurasikan Filtering Distribute List Agar yang Boleh Lewat Hanya IP Genap Saja.
R2
R2(config)#router ospf 2
R2(config-router)#distribute-list 1 in
R2(config-router)#exit
R2(config)#do sh ip route ospf Cek kembali
R2
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
R1(config)#do sh ip ospf database
OSPF 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
Nah yang paling penting nih dan diperhatikan ospf databasenya yang tidak berubah meski sudah di filter, hal tersebut dikarenakan pada OSPF semua router dlam satu area memiliki database yang sama dan coba kalian cek di router lain.
R1
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
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
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
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
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
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
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
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
OSPF Router with ID (3.3.3.3) (Process ID 3)
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 R3
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
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
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
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
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
R3(config)#do sh ip route ospf 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 nya yang sama dan beriklut routing table dari R3.
R3
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
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