VLAN merupakan suatu model jaringan yang tidak terbatas pada lokasi fisik seperti LAN , hal ini mengakibatkan suatu network dapat dikonfigurasi secara virtual tanpa harus menuruti lokasi fisik peralatan. Konsep VLAN ada disebabkan karena jaringan konvensional yang bersifat ‘flat’ mempunyai beberapa isu sebagai berikut :

Failure domain : suatu kondisi dimana batasan antara Layer 2 dan Layer 3 tidak jelas didefinisikan yang menyebabkan kegagalan pada satu area jaringan berdampak pada seluruh jaringan.

Broadcast domain Banyaknya Jumlah trafik Unicast MAC Adanya trafik multicast pada semua port Kesulitan dalam proses management dan support Memungkinkan adanya ketidakamanan jaringan.

Keuntungan VLAN adalah memudahkan dalam proses management dan troubleshooting, error lebih sedikit dan mengurangi input table routing. Untuk mengetahui konsep vlan lebih jelas dapat dilihat pada link iniPada tutorial ini saya akan mensimulasikan cara setting VLAN dan Routing InterVLAN dimana pada tutorial ini saya menggunakan tool Cisco Packet Tracer version 5.3. Berikut ini gambar simulasi yang akan saya lakukan.

Created by : Black Gemi

Pada jaringan diatas terdapat terdapat 5 VLAN yaitu VLAN 1, IT, UMUM, SERVER, dan HRD. Berikut ini konfigurasi masing-masing perangkat.

KONFIGURASI SWITCH 1

## Setting IP di Switch Switch>enSwitch#configure terminal Switch(config)#hostname Switch1Switch1(config)#interface vlan 1Switch1(config-if)#ip address 192.168.1.3 255.255.255.224Switch1(config-if)#no shutdown

## Setting Mode Switch Sebagai VTP Server Switch1(config)#vtp mode serverSwitch1(config)#vtp domain blackgemiSwitch1(config)#vtp password rahasia

## Menambahkan database VLANSwitch1(config)#vlan 2Switch1(config-vlan)#name ITSwitch1(config-vlan)#vlan 3Switch1(config-vlan)#name HRDSwitch1(config-vlan)#vlan 4Switch1(config-vlan)#name UMUMSwitch1(config-vlan)#vlan 5Switch1(config-vlan)#name SERVER

## Setting port TrunkSwitch1(config)#interface fa0/24Switch1(config-if)#switchport mode trunk Switch1(config-if)#interface fa0/23Switch1(config-if)#switchport mode trunk

##Setting anggota VLAN (VLAN Membership)Switch1(config)#interface range fastEthernet 0/1-5Switch1(config-if-range)#switchport access vlan 4Switch1(config-if-range)#interface range fastEthernet 0/6Switch1(config-if-range)#switchport access vlan 5

KONFIGURASI SWITCH 0

## Setting IP di SwitchSwitch>enSwitch#configure terminal Switch(config)#hostname Switch0Switch0(config)#interface vlan 1Switch0(config-if)#ip address 192.168.1.2 255.255.255.224Switch0(config-if)#no shutdown

## Setting Mode Switch Sebagai VTP Server

Created by : Black Gemi

Switch0(config)#vtp mode client Switch0(config)#vtp domain blackgemiSwitch0(config)#vtp password rahasia

##Setting anggota VLAN (VLAN Membership)Switch0(config)#interface range fastEthernet 0/1-5Switch0(config-if-range)#switchport access vlan 2Switch0(config-if-range)#interface range fastEthernet 0/6-10Switch0(config-if-range)#switchport access vlan 3Switch0(config-if-range)#interface range fastEthernet 0/11-15Switch0(config-if-range)#switchport access vlan 4

VERIFIKASI SWITCH 1Switch1#sh vlan

VLAN Name Status Ports---- -------------------------------- --------- -------------------------------1 default active Fa0/7, Fa0/8, Fa0/9, Fa0/10 Fa0/11, Fa0/12, Fa0/13, Fa0/14 Fa0/15, Fa0/16, Fa0/17, Fa0/18 Fa0/19, Fa0/20, Fa0/21, Fa0/22 Fa0/232 IT active 3 HRD active 4 UMUM active Fa0/1, Fa0/2, Fa0/3, Fa0/4 Fa0/55 SERVER active Fa0/61002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------1 enet 100001 1500 - - - - - 0 02 enet 100002 1500 - - - - - 0 03 enet 100003 1500 - - - - - 0 04 enet 100004 1500 - - - - - 0 05 enet 100005 1500 - - - - - 0 01002 fddi 101002 1500 - - - - - 0 0 1003 tr 101003 1500 - - - - - 0 0 1004 fdnet 101004 1500 - - - ieee - 0 0 1005 trnet 101005 1500 - - - ibm - 0 0

Remote SPAN VLANs------------------------------------------------------------------------------

Primary Secondary Type Ports------- --------- ----------------- ------------------------------------------

Created by : Black Gemi

Switch1#sh int trunk Port Mode Encapsulation Status Native vlanFa0/24 on 802.1q trunking 1

Port Vlans allowed on trunkFa0/24 1-1005

Port Vlans allowed and active in management domainFa0/24 1,2,3,4,5

Port Vlans in spanning tree forwarding state and not prunedFa0/24 1,2,3,4,5

Switch1#sh vtp statusVTP Version : 2Configuration Revision : 8Maximum VLANs supported locally : 255Number of existing VLANs : 9VTP Operating Mode : ServerVTP Domain Name : blackgemiVTP Pruning Mode : DisabledVTP V2 Mode : DisabledVTP Traps Generation : DisabledMD5 digest : 0xA2 0x69 0x0B 0x72 0xEF 0x17 0xFF 0x56 Configuration last modified by 0.0.0.0 at 3-1-93 00:19:43Local updater ID is 0.0.0.0 (no valid interface found)

VERIFIKASI SWITCH 0Switch0#sh vlan

VLAN Name Status Ports---- -------------------------------- --------- -------------------------------1 default active Fa0/16, Fa0/17, Fa0/18, Fa0/19 Fa0/20, Fa0/21, Fa0/22, Fa0/232 IT active Fa0/1, Fa0/2, Fa0/3, Fa0/4 Fa0/53 HRD active Fa0/6, Fa0/7, Fa0/8, Fa0/9 Fa0/104 UMUM active Fa0/11, Fa0/12, Fa0/13, Fa0/14 Fa0/155 SERVER active 1002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup

VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------1 enet 100001 1500 - - - - - 0 02 enet 100002 1500 - - - - - 0 03 enet 100003 1500 - - - - - 0 04 enet 100004 1500 - - - - - 0 05 enet 100005 1500 - - - - - 0 0

Created by : Black Gemi

1002 fddi 101002 1500 - - - - - 0 0 1003 tr 101003 1500 - - - - - 0 0 1004 fdnet 101004 1500 - - - ieee - 0 0 1005 trnet 101005 1500 - - - ibm - 0 0

Remote SPAN VLANs------------------------------------------------------------------------------

Primary Secondary Type Ports------- --------- ----------------- ------------------------------------------

Switch0#sh int trunk Port Mode Encapsulation Status Native vlanFa0/24 auto n-802.1q trunking 1

Port Vlans allowed on trunkFa0/24 1-1005

Port Vlans allowed and active in management domainFa0/24 1,2,3,4,5

Port Vlans in spanning tree forwarding state and not prunedFa0/24 1,2,3,4,5

Switch0#sh vtp status VTP Version : 2Configuration Revision : 8Maximum VLANs supported locally : 255Number of existing VLANs : 9VTP Operating Mode : ClientVTP Domain Name : blackgemiVTP Pruning Mode : DisabledVTP V2 Mode : DisabledVTP Traps Generation : DisabledMD5 digest : 0xA2 0x69 0x0B 0x72 0xEF 0x17 0xFF 0x56 Configuration last modified by 0.0.0.0 at 3-1-93 00:19:43

KONFIGURASI DI ROUTER (INTERVLAN ROUTING)

## Setting Layer 3 Router>enRouter#configure terminal Router(config)#hostname Router0Router0(config)#interface fa0/0Router0(config-if)#ip address 192.168.1.1 255.255.255.224Router0(config-if)#no shutdown

## Setting Subinterface (Alokasi Subnet)

Created by : Black Gemi

Router0(config-if)#interface fa0/0.2Router0(config-subif)#encapsulation dot1Q 2Router0(config-subif)#ip address 192.168.1.33 255.255.255.248Router0(config-subif)#interface fa0/0.3Router0(config-subif)#encapsulation dot1Q 3Router0(config-subif)#ip address 192.168.1.65 255.255.255.248Router0(config-subif)#interface fa0/0.4Router0(config-subif)#encapsulation dot1Q 4Router0(config-subif)#ip address 192.168.1.97 255.255.255.224Router0(config-subif)#interface fa0/0.5Router0(config-subif)#encapsulation dot1Q 5Router0(config-subif)#ip address 192.168.1.129 255.255.255.252

Created by : Black Gemi