CCNP (switch) – How to configure VLANs

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.