VLAN Revision


Before you begin today, you should read the Cisco guide to VLANs.
Cisco guide to VLANs



Download the .pkt file

This is a partially complete network. Two VLANs have already been configured on Switch 0.

Use the command show vlan to discover which ports the VLANs are associated with.

The routing has already been configured across the routers. You should verify that you have full connectivity across the network devices.

What type of cable connects the Switch 0 and Switch 2? Why is this type of cable used?

View the configuration of Router 0. Note that there are two subinterfaces connected to Fa0/0.

What routing protocol is in use?

What are the subnets currently in use for the two subinterfaces?

Adding to VLAN 10

Use the CLI on Switch 2 to determine which VLANs are already configured.
You should connect two PCs to Switch 2 and configure them to become members of VLAN 10.

You will need to decide on network numbering here and also configure VLANs on two of the ports of Switch 2.

If you are not sure how to do this, look at the configuration of Switch 0.

Name these PCs as members of VLAN 10 so it is easy to see on the screen.

Check that you have full connectivity before proceeding.


Adding to VLAN 20
You should connect two more PCs to Switch 2 and configure them to become members of VLAN 20.

You will need to decide on network numbering here and also configure VLANs on two more of the ports of switch 2.


Name these PCs as members of VLAN 20 so it is easy to see on the screen.

Check that you have full connectivity before proceeding.

Configure Router 1
You should now add vlans 10 and 20 to Router 1

Check the configuration of Router 0 to see how this is configured.

You can add the following to configure vlan 10

It is your choice as to the IP address to give to the interface.

interface FastEthernet0/0.1
 description vlan 10
 encapsulation dot1Q 10
 ip address 192.168.10.x 255.255.255.0

Now add vlan 20 to Router 1 in the same manner.

Check connectivity before proceeding.

Now add
DHCP to Router 1. Use the similar configuration to that on Router 0.

Configure VLANs on Switch 1

Now check Switch 1 for vlans. you will need to add vlans 10 and 20 to this switch. Remember which ports you will be using so that you add the PCs to the correct ports for the vlans.

Add 4 PCs, 2 to each vlan on Switch 1. Be sure to select the DHCP client option so that they obtain IP addressing details from Router 1.

Check connectivity.


Check Connectivity

Make sure that
all your PCs can connect to each other.