Configuring VLAN on a Cisco Switch
On this page, we learn how to configure:
The following is a basic configuration of VLAN on Cisco Switche Interfaces:
Before you begin you must have worked out your IP addresses
We are configuring VLAN ports for three departments:
VLAN 10, Name: orbit
VLAN 20, Name:cisco
VLAN 30, Name: Student
We use the topology below as an example:
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.
