Configure VLAN on cisco switches

VLAN stands for virtual LAN and technically we can say, a VLAN is a broadcast domain created by switch. When managing a switch, the management domain is always VLAN 1, the default VLAN. All ports of switch are assigned to VLAN 1 by default.

Any member of VLAN 2 can not talk with any member of VLAN 3 without router but all the members of VLAN 2 and VLAN 3 can talk with other members within their VLANs.

Configuring of VLAN is as follow:

Configuration to create VLAN 2

 

First we enter the configuartion mode

SwitchA(config)#configure terminal

 Define VLAN

SwitchA(config)#vlan 2

Assign name to the VLAN2

SwitchA(config)# vlan 2 name marketing

Exit from VLAN 2

SwitchA(config)# exit

Now configure VLAN 3

SwitchA(config)# configure terminal

Define VLAN

SwitchA(config)#vlan 3

Assign name to VLAN 3

SwitchA(config)# vlan 3 name management

Exit from VLAN 3

SwitchA(config)# exit

Now add port 2 and 3 to VLAN 2 . Following are the commands to add ports.

Add port 2

SwitchA(config)#configure terminal

SwitchA(config)#interface fastethernet 0/2

SwitchA(config-if)#switchport access vlan 2

SwitchA(config-if)#exit

Add port 3

SwitchA(config)#interface fastethernet 0/3

SwitchA(config-if)#switchport access vlan 2

SwitchA(config-if)#exit

Now add port 4 and 5 to VLAN3. Following are the commands

add port 4

SwitchA(config)#configure terminal

SwitchA(config)#interface fastethernet 0/4

SwitchA(config-if)#switchport access vlan 3

SwitchA(config-if)#exit

add port 5

SwitchA(config)#interface fastethernet 0/5

SwitchA(config-if)#switchport access vlan 3

SwitchA(config-if)#exit

To show VLAN interface , run the command show-vlan