How to configure VLANs?
Suppose you have two members of IT department connected with fastethernet 0/3 and 0/4 ports of switch and you want to create VLAN 2 for IT department. And you have two members for HR department connected with fastethernet 0/7 and 0/9 and want to create VLAN 3 for HR department.
Switch#config
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
(Creating VLAN 2)
Switch(config)#vlan 2
Switch(config-vlan)#name IT
Switch(config-vlan)#exit
(Assigning membership of VLAN 2 to 0/3 and 0/4)
Switch(config)#interface fastEthernet 0/3
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 2
Switch(config-if)#exit
Switch(config)#interface fastEthernet 0/4
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 2
Switch(config-if)#exit
(Creating VLAN 3 for HR department)
Switch(config)#vlan 3
Switch(config-vlan)#name HR
Switch(config-vlan)#exit
(Assigning membership)
Switch(config)#int fa 0/7
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 3
Switch(config-if)#exit
Switch(config)#int fa 0/9
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 3
Switch(config-if)#exit
Switch(config)#exit
Switch#
%SYS-5-CONFIG_I: Configured from console by console
(To save configuration)
Switch#wr
Building configuration…
[OK]
(To check VLANs and port’s membership with these VLANs)
Switch#show vlan
VLAN Name Status Ports
—- ——————————– ——— ——————————-
1 default active Fa0/1, Fa0/2, Fa0/5, Fa0/6
Fa0/8, 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, Fa0/23, Fa0/24
Gig1/1, Gig1/2
2 IT active Fa0/3, Fa0/4
3 HR active Fa0/7, Fa0/9
Now you have to create VLAN 2 for IT department and VLAN 3 for HR on every switch in company. Now, if you create any other VLAN for IT department on another switch, they will not be able to connect with each other.
