INTERVLAN

InterVLAN adalah metode yang digunakan untk membagi satu network fisik menjadi beberapa broadcast domain. Untuk mendukung hal tersebut, maka VLAN membutuhkan device layer 3 untukk memforward traffic menuju VLAN seberang.

Kita Lihat topologi dibawah ini :
Permasalahannya adalah bagaimana komputer pada vlan sales, manage service, analyst, dan finance yang berbeda alokasi vlan secara logic sehingga dapat bertukar data. 

interVLAN

Dari gambar diatas, anda tentunya sudah cukup paham dengan topologinya. Dalam kasus ini adalah bagaimana caranya agar semua komputer yang terhubung pada switch dapat terkoneksi dengan ISP, yang dibuktikan dengan paket ping dari komputer client internal menuju ISP diluar dari network PAT.
Kita akan menggunakan packet tracer sebagai simulator.

Langkah – langkah :

1. Konfigurasi VLAN.
2. Konfigurasi VTP.
3. Konfigurasi STP.
4. Konfigurasi Sub-Interface pada Router

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Berikut Konfigurasinya :

ISP RouterRouter_ISP#sh run Building configuration…Current configuration : 839 bytes ! version 12.2 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Router_ISP ! ! enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1 ! ! ! ip name-server 0.0.0.0 ! ! ! interface FastEthernet0/0 ip address 192.168.1.1 255.255.255.0 duplex auto speed auto ! interface Serial0/0 description Link to Router Internal PAT ip address 10.10.20.1 255.255.255.0 ! interface Serial0/1 no ip address shutdown ! interface FastEthernet1/0 description *** To Router PAT *** ip address 10.10.10.1 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/1 no ip address duplex auto speed auto ! router rip version 2 network 10.0.0.0 ! ip classless ! ! ! line con 0 password cisco login line vty 0 4 password cisco login ! ! end

Router PATRouter_PAT#sh run Building configuration…Current configuration : 1399 bytes ! version 12.2 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Router_PAT ! ! enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1 ! ! ! ip name-server 0.0.0.0 ! ! ! interface FastEthernet0/0 no ip address duplex auto speed auto ! interface FastEthernet0/0.1 description Sub-Int 4 Manage VLAN encapsulation dot1Q 1 native ip address 192.168.1.1 255.255.255.0 ! interface FastEthernet0/0.10 description Sub-Int 4 Sales encapsulation dot1Q 10 ip address 192.168.10.1 255.255.255.0 ! interface FastEthernet0/0.20 description Sub-Int 4 Net_Analyst n Spesialist encapsulation dot1Q 20 ip address 192.168.20.1 255.255.255.0 ! interface FastEthernet0/0.30 description Sub-Int 4 Managed Service encapsulation dot1Q 30 ip address 192.168.30.1 255.255.255.0 ! interface FastEthernet0/0.40 description Sub-Int 4 Finance encapsulation dot1Q 40 ip address 192.168.40.1 255.255.255.0 ! interface FastEthernet1/0 ip address 10.10.10.2 255.255.255.0 duplex auto speed auto ! interface FastEthernet1/1 no ip address duplex auto speed auto ! router rip version 2 network 10.0.0.0 network 192.168.1.0 network 192.168.10.0 network 192.168.20.0 network 192.168.30.0 network 192.168.40.0 ! ip classless ! ! ! line con 0 password cisco login line vty 0 4 password cisco login ! ! end

CORE SwitchCore_Switch#sh run Building configuration…Current configuration : 1198 bytes ! version 12.1 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Core_Switch ! enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1 ! no ip domain-lookup ! ! interface FastEthernet0/1 switchport mode trunk ! interface FastEthernet0/2 switchport mode trunk ! interface FastEthernet0/3 switchport mode trunk ! interface FastEthernet0/4 ! interface FastEthernet0/5 switchport mode trunk ! interface FastEthernet0/6 ! interface FastEthernet0/7 ! interface FastEthernet0/8 ! interface FastEthernet0/9 ! interface FastEthernet0/10 ! interface Vlan1 ip address 192.168.1.2 255.255.255.0 ! ip default-gateway 192.168.1.1 ! ! line con 0 password cisco login ! line vty 0 4 password cisco login line vty 5 15 login ! ! end

SW Client 1 SW_Client_1#sh run Building configuration…Current configuration : 2307 bytes ! version 12.1 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname SW_Client_1 ! enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1 ! ! spanning-tree vlan 20 priority 24576 ! interface FastEthernet0/1 switchport mode trunk ! interface FastEthernet0/2 switchport access vlan 30 switchport mode access ! interface FastEthernet0/3 switchport mode trunk ! interface FastEthernet0/4 switchport access vlan 20 switchport mode access ! interface FastEthernet0/5 switchport access vlan 10 switchport mode access ! interface FastEthernet0/6 switchport access vlan 10 switchport mode access ! interface FastEthernet0/7 switchport access vlan 10 switchport mode access ! interface FastEthernet0/8 switchport access vlan 10 switchport mode access ! interface FastEthernet0/9 switchport access vlan 10 switchport mode access ! interface FastEthernet0/10 switchport access vlan 10 switchport mode access ! interface FastEthernet0/11 switchport access vlan 10 switchport mode access ! interface FastEthernet0/12 switchport access vlan 10 switchport mode access ! interface FastEthernet0/13 switchport access vlan 10 switchport mode access ! interface FastEthernet0/14 switchport access vlan 10 switchport mode access ! interface GigabitEthernet1/1 ! interface GigabitEthernet1/2 ! interface Vlan1 no ip address shutdown ! ! line con 0 password cisco login ! line vty 0 4 password cisco login line vty 5 15 login ! ! end

SW Client 2SW_Client_2#sh run Building configuration…Current configuration : 1756 bytes ! version 12.2 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname SW_Client_2 ! enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1 ! ! ! interface FastEthernet0/1 switchport mode trunk ! interface FastEthernet0/2 switchport mode trunk ! interface FastEthernet0/3 switchport mode trunk ! interface FastEthernet0/4 switchport access vlan 40 switchport mode access ! interface FastEthernet0/5 switchport access vlan 30 switchport mode access ! interface FastEthernet0/6 switchport access vlan 20 switchport mode access ! interface FastEthernet0/7 switchport mode access ! interface FastEthernet0/8 switchport mode access ! interface FastEthernet0/9 switchport mode access ! interface FastEthernet0/10 switchport mode access ! interface FastEthernet0/11 switchport mode access ! interface FastEthernet0/12 switchport mode access ! interface FastEthernet0/13 switchport mode access ! interface FastEthernet0/14 switchport mode access ! interface FastEthernet0/15 switchport mode access ! interface GigabitEthernet1/1 ! interface GigabitEthernet1/2 ! interface Vlan1 no ip address shutdown ! ! line con 0 password cisco login ! line vty 0 4 password cisco login line vty 5 15 login ! ! end

SW Client 3SW_Client_3#sh run Building configuration…Current configuration : 2270 bytes ! version 12.2 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname SW_Client_3 ! enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1 ! ! ! interface FastEthernet0/1 switchport mode trunk ! interface FastEthernet0/2 switchport mode trunk ! interface FastEthernet0/3 switchport access vlan 10 switchport mode access ! interface FastEthernet0/4 switchport access vlan 40 switchport mode access ! interface FastEthernet0/5 switchport access vlan 30 switchport mode access ! interface FastEthernet0/6 switchport access vlan 30 switchport mode access ! interface FastEthernet0/7 switchport access vlan 30 switchport mode access ! interface FastEthernet0/8 switchport access vlan 30 switchport mode access ! interface FastEthernet0/9 switchport access vlan 30 switchport mode access ! interface FastEthernet0/10 switchport access vlan 30 switchport mode access ! interface FastEthernet0/11 switchport access vlan 30 switchport mode access ! interface FastEthernet0/12 switchport access vlan 30 switchport mode access ! interface FastEthernet0/13 switchport access vlan 30 switchport mode access ! interface FastEthernet0/14 switchport access vlan 30 switchport mode access ! interface FastEthernet0/15 switchport access vlan 30 switchport mode access ! interface GigabitEthernet1/1 ! interface GigabitEthernet1/2 ! interface Vlan1 no ip address shutdown ! ! line con 0 password cisco login ! line vty 0 4 password cisco login line vty 5 15 login ! ! end

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