VLAN

Task:

• Divide one physical network (1 switch and 6 PCs) in two separate virtual LANs
• Ports 1 to 10, 21 and 23 should be in LAN 2
• Ports 11 to 20 and 22 should be in LAN 2
• Port 24 should remain in LAN 1
• VLAN 2: PC1 – IP 192.168.0.1/24, Port 1; PC2 – IP 192.168.0.2/24, Port 3; PC3 – IP 192.168.0.3/24, Port 21
• VLAN 3: PC4 – IP 192.168.0.4/24, Port 11;  PC5 – IP 192.168.0.5/24, Port 13;  PC6 – IP 192.168.0.6/24, Port 22

Creating VLAN 2 and VLAN 3

Switch(config)#interface vlan 2
Switch(config-if)#exit
Switch(config)#interface vlan 3
Switch(config-if)#exit

If you skip this step, VLANs will be later automaticaly created.

Adding ports 1 to 10 in VLAN 2

Switch(config)#interface range FastEthernet 0/1 - FastEthernet 0/10
Switch(config-if-range)#switchport mode access
Switch(config-if-range)#switchport access vlan 2
% Access VLAN does not exist. Creating vlan 2
Switch(config-if-range)#exit

Example how to configure range of ports, from portX to portY

Adding ports 21 and 23 in VLAN 2

Switch(config)#interface range FastEthernet 0/1 - FastEthernet 0/10
Switch(config-if-range)#switchport mode access
Switch(config-if-range)#switchport access vlan 2
% Access VLAN does not exist. Creating vlan 2
Switch(config-if-range)#exit

Example how to configure range of ports, listing all individually.

Adding ports 11 to 20 in VLAN 3

Switch(config)#interface range fa0/11 - fa0/20
Switch(config-if-range)#switchport mode access 
Switch(config-if-range)#switchport access VLAN 3
% Access VLAN does not exist. Creating vlan 3
Switch(config-if-range)#
%LINK-5-CHANGED: Interface Vlan3, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan3, changed state to up
exit

Adding port 22 in VLAN 3

Switch(config)#interface fa0/22
Switch(config-if)#switchport mode access 
Switch(config-if)#switchport access VLAN 3
Switch(config-if)#exit

Example how to ad single port in VLAN

Splitting one network in two VLANs