VLANS – (class notes)

Vlans help us group hosts by whatever category.

Vlans allow you to increase security by hiding logical group of hosts from everyone else you want.

Prevents broadcast storms.

Broadcast storms slow network performance down a little, little more, little more and prevents basic switching functions.

IP address run at layer three.

Lab Example


If your on host one and you

host1# show cdp neighbor

You’ll see your physical connections.


Log on to switch1

switch1# show cdp neighbor

See all of your connections.

show vlan will give you info you need.


switch1# config t

switch1#(config) #int fast 0/2

switch1(config-if)# switchport access vlan 24

this is creating vlan 24

switch1#(config) #int fast 0/4

switch1(config-if)# switchport access vlan 24

switch1#show vlan brief

You’ll see it was created



Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s