Virtual LAN (VLAN)

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We use VLAN technology when we want to make a several segment for LAN network. VLAN is configured in switch device. We can also make a group for user depends on the need.

In VLAN theres intra-VLAN and inter-VLAN. Intra-VLAN is when communication happens between host in same VLAN-ID. Inter-VLAN is a communication between host in different VLAN-ID. VLAN 1 is the default if you not configure anything on the switch.

In this documentation we use Cisco Packet Tracer for documentation

1.VLAN part 1

  • First, create this topology in your Cisco Packet Tracer
_images/vlan1.png

Set PC ip address to :

PC0 ip address

_images/pc0.png

PC1 ip address

_images/pc1.png

PC2 ip address

_images/pc2.png

PC3 ip address

_images/pc3.png
  • Do ping to check reachability
_images/cekping.png

After we make sure that they can ping each other, now we make configuration on switch. In this documentation we make vlan topology with VLAN 1 and 2 as an example.

_images/vlan12.png
  • Enable
Switch> en
  • Configuration mode
Switch# conf
  • Create VLAN 2 (becasue VLAN 1 already created by default)
Switch(config)# VLAN 2
  • Name your VLAN 2
Switch(config-vlan)# name example
  • Make PC3 into VLAN 2 group
Switch(config)# int f2/1
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 2
  • Make PC2 into VLAN 2 group
Switch(config)# int fa3/1
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan 2

Note

Look carefully at your interface, it might be different with this example

  • Now try to ping PC in different VLAN-ID, it should be failed.
Sources :
  • Modul CnC SPC Network 2014