Setting up a VLAN with the Cisco IOS

Recently, in my forums at my personal website, I have a VLAN Question thread going with over 20 posts and 638 views. Additionally, I have a free video where I demonstrate how to configure VLANs in the Cisco IOS. This video is one of the most popular free videos on my site.

Because of the popularity of these two sites, I wanted to take a second to cover the basics on VLAN configuration. Here are some crucial VLAN “show” commands on a switch:

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Show vlan brief
Show interfaces switchport
Show ip interface brief
Show int trunk

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And here is how you would configure a VLAN routing on your router with some show commands:
Router commands
Interface fastethernet 4.1
Encapsulation dot1q 10

Interface fastethernet 4.2
Encapsulation dot1q 20

Interface fastethernet 4
No shutdown

Show ip interface brief
Show vlans

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And here is how you would configure a VLAN on your switch:

Switch commands
Interface fastethernet 2/0
Switchport access vlan 10
No shutdown

Interface fastethernet 5/0
Switchport access vlan 20
No shutdown

Interface vlan 10
Ip address x.x.x.x y.y.y.y
No shutdown

Interface vlan 20
Ip address x.x.x.x y.y.y.y
No shutdown

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I hope that sample configuration helps you out and don’t forget about my VLAN Configuration video where you can see how it is configured, step by step.

http://itknowledgeexchange.techtarget.com/cisco/setting-up-a-vlan-with-the-cisco-ios/