Hotel case study - VLANs

VLANs and trunks

Explanation

What you need to do

• You should create and name one VLAN for hotel staff and a separate VLAN for Guests on each floor of the hotel. This will require three VLANs at each site.
• You should configure trunks between the access and distribution layer devices.
• You should place the access layer ports used by the PCs in appropriate VLANs.

Where to configure this
VLANs define the security roles for devices at the access layer. The VLANs provide a separation of traffic that forms the basis of security at this layer. In order to provide connectivity between VLANs we need routing and that function is delivered by the distribution layer. Thus the VLANs need to be present on that layer as well. To carry VLAN information (tags) between the access and the distribution layer, our links need to be configured as trunks.

So every access layer and distribution layer device that deals with a particular VLAN needs to have that VLAN present and every link between the two layers needs to be a trunk. Often the VLAN and trunks will need to cover more links than are necessary for bare connectivity because we are also providing redundant paths for reliability.

How you will know it is configured correctly
You can use the show vlan and show interfaces trunk to verify VLAN and trunk creation and the assignment of ports (interfaces) to VLANs.

What questions could I see on the practical exam?

• You might need to set or change a hostname.

   You might need to set or change a hostname.

• Use VTP mode transparent as this will force EVE to save your VLAN information in the running configuration.

• Trunks should be implemented between the distribution and access switches to provide redundant connections.
• The access switch port connecting to each PC should be placed in an appropriate VLAN.