What is VLAN ? VLAN Configuration Example

By | 9th November 2015

How To Configure VLAN

On this page, we learn how to configure:

*   Telnet line and Password

*   Console line and Password

*   VLAN and names

*   Switch host names

*   Delete a VLAN

*   Assigning a switch port

The following is a basic configuration of VLAN on Cisco Switch Interfaces:

Before you begin you must have worked out your IP addresses

 We are configuringVLAN ports for three departments:

VLAN 10, Name: orbit

VLAN 20, Name:cisco

VLAN 30, Name: Student




We use the topology below as an example:

VLAN Configuration

Configuring Telnet line and password:

switch1#config t

Switch1(config)#enable secret cisco

Switch1(config)#line vty 0 15

Switch1(config-line)#password cisco

Switch1(config-line)#login

Switch1(config-line)#exit

Configuring console line and password:

Switch1(config)#line con 0

Switch1(config-line)#password cisco

Switch1(config-line)#login

Switch1(config-line)#exit

Create and Configure VLANs and Names  on Switch:

Switch1#config t

switch1(config)#vlan 10

switch1(config-vlan)#name orbit

switch1(config-vlan)#exit

switch1(config)#vlan 20

switch1(config-vlan)#name cisco

Switch11(config-vlan)#exit

Switch1(config)#vlan 30

Switch1(config-vlan)#name student

Switch1(config-vlan)#exit

Switch1(config)#exit




To view your configurations, use the show vlan command: –

Switch1#show vlan

VLAN Name                             Status    Ports

—- ——————————– ——— ——————————-

1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/4

                                             Fa0/5, Fa0/6, Fa0/7, Fa0/8

                                              Fa0/9, 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

10   orbit                            active

20   cisco                            active

30   student                          active

1002 fddi-default                     active

1003 token-ring-default               active

1004 fddinet-default                  active

005 trnet-default                    active

<input omitted>

Switch#

How to assign a switchport to a VLAN.

After creating your VLAN, you can assign a switch port to the VLAN .

  VLAN 20, is statically assigned to port F0/8 on switch S1:

Switch1#config t

Switch1(config)#interface fa0/2

Switch1(config-if)#switchport mode access

Switch1(config-if)#switchport access vlan 20

Switch1(config-if)#no shut

Switch1(config-if)#exit

Switch1(config)#exit

Switch1#

use the above commands to assign the rest of the VLANs a switchport access.




How to delete VLANs

To delete a VLAN, use the global configuration command no vlan vlan-id to remove VLAN 20 from the switch.

e.g.

Switch1(config)#no vlan 10

Switch1(config)#end

Use the show vlan brief command to verify that VLAN 20 is no longer in the vlan.dat file.

Alternatively, the entire vlan.dat file can be deleted using the command delete flash:vlan.dat from privileged EXEC mode. After the switch is reloaded, the previously configured VLANs will no longer be present. This effectively places the switch into is “factory default” concerning VLAN configurations.

How To Configure VTP

VLAN ID ranges

VLAN Switch Port Membership

VLAN Trunking

 Inter-VLAN Routing

How To Configure Switch Security

Spanning Tree Protocol (STP)

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