Cisco: OSPF Sederhana - dengan MD5 Authentication

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Image6005.gif


Topologi

R1 

e1 -- R3: e1
e2 -- R2: e1
e3 -- NAT: Internet

R2 

e1 -- R2: e1
e2 -- R3: e2
e3 -- LAN 172.16.1.1

R3 

e1 -- R1: e1
e2 -- R2: e2
e3 -- LAN 192.168.1.1


Konfigurasi

Router1: 

enable
configure terminal
  interface ethernet1/1
    ip address 10.10.1.1 255.255.255.252
    ip ospf message-digest-key 1 md5 $AP7i1
    no shutdown
    exit
  interface ethernet1/2
    ip address 10.10.1.5 255.255.255.252
    ip ospf message-digest-key 1 md5 $AP7i1
    no shutdown
    exit
  !
  ! NAT GNS3 gw 192.168.122.1
  interface ethernet1/3
    ip address 192.168.122.100 255.255.255.0
    ip address 192.168.122.101 255.255.255.0 secondary
    ip address 192.168.122.102 255.255.255.0 secondary
    no shutdown
    ip route 0.0.0.0 0.0.0.0 192.168.122.1
  end

Router2: 

enable
configure terminal
  interface ethernet1/1
    ip address 10.10.1.6 255.255.255.252
    ip ospf message-digest-key 1 md5 $AP7i1
    no shutdown
    exit
  interface ethernet1/2
    ip address 10.10.1.9 255.255.255.252
    ip ospf message-digest-key 1 md5 $AP7i1
    no shutdown
    exit
  interface ethernet1/3
    ip address 172.16.1.1 255.255.0.0
    no shutdown
    end

Router3: 

enable
configure terminal
  interface ethernet1/1
    ip address 10.10.1.2 255.255.255.252
    ip ospf message-digest-key 1 md5 $AP7i1
    no shutdown
    exit
  interface ethernet1/2
    ip address 10.10.1.10 255.255.255.252
    ip ospf message-digest-key 1 md5 $AP7i1
    no shutdown
    exit
  interface ethernet1/3
    ip address 192.168.1.1 255.255.255.0
    no shutdown
    end

Ada tiga (3) elemen dasar konfigurasi OSPF:

  • Enable OSPF instance
  • OSPF area configuration
  • OSPF network configuration


Catatan: Ingat bahwa backbone area-id adalah 0.0.0.0.

R1 

enable
configure terminal
  !
  ! area 0 = backbone
  router ospf 1
  network 10.10.1.0 0.0.0.3 area 0.0.0.0
  network 10.10.1.4 0.0.0.3 area 0.0.0.0
  area 0.0.0.0 authentication message-digest
  end

R2 

enable
configure terminal
  !
  ! area 0 = backbone
  router ospf 2
  network 10.10.1.4 0.0.0.3 area 0.0.0.0
  network 10.10.1.8 0.0.0.3 area 0.0.0.0
  network 172.16.0.0 0.0.255.255 area 0.0.0.0
  area 0.0.0.0 authentication message-digest
  end

R3 

enable
configure terminal
  !
  ! area 0 = backbone
  router ospf 3
  network 10.10.1.0 0.0.0.3 area 0.0.0.0
  network 10.10.1.8 0.0.0.3 area 0.0.0.0
  network 192.168.1.0 0.0.0.255 area 0.0.0.0
  area 0.0.0.0 authentication message-digest
  end

Verify

Cek di R1, R2, R3 

show ip ospf neighbor
show ip ospf database 
show ip route


Referensi


Pranala Menarik

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