VLAN Examination Lab Work 01

ASNT Lab Work

VLAN Examination
Contents
Introduction
VLAN Examination Lab Part 1
VLAN Examination Lab Part 2
VLAN Examination Lab Part 3
VLAN Examination Lab Part 4
VLAN Examination Lab Part 5
Reflection
Further work

For ALL lab work in this course, you are expected to keep notes of the labs/workshops in a Log Book.
Your Log Books will be assessed during this course and will be handed in at the end of the course.
They may be analogue or digital in nature.

Introduction

Today's work is to examine a network that has VLANs already enabled and make notes of various important features within the network.

This will be important to allow you to design your own network when required.

VLAN Examination Lab Part 1

Open Packet Tracer 5.0.

Download this Packet Tracer file.

Save your network as vlan-lab-02.pkt

Wait a little while until the switches have initialised and the ports have changed colour from red.
Why did you have to wait?
What was happening within your network during the waiting time?

Do NOT switch the Medway router on yet.

1. Using the command line of the PCs, work out their IP addresses.

2. Notice that the links between the 3 PCs and the Nelson01 switch are active.

3. Try to ping the Student PC from the Staff PC

4. Try to ping the Admin PC from the Staff PC

5. Try to ping the Student PC from the Admin PC

6. What was the result of steps 3, 4 and 5?

7. Why do you think this happened?

Discuss with your colleagues possible reasons for your results above.

Make notes in your Log Book

When you have finished this part, you may proceed.

VLAN Examination Lab Part 2

Now that you have reached this stage, please turn the Medway router on.

Give the router and network a little while to initialise fully - you may need to wait a minute or so before the Medway router becomes an active node in the network.

1. Try to ping the Student PC from the Staff PC

2. Try to ping the Admin PC from the Staff PC

3. Try to ping the Student PC from the Admin PC

4. What was the result of steps 1, 2 and 3?

5. Why do you think this happened?

Discuss with your colleagues possible reasons for your results above.

Make notes in your Log Book

When you have finished this part, you may proceed.

Save your network again as vlan-lab-02.pkt

VLAN Examination Lab Part 3

IOS Commands will be needed here

Open the CLI of the Nelson01 switch.
Enter priv exec mode (use the enable command)

At the command prompt type:

Nelson01#show vlan

1. Make a note of the VLANs currently enabled on the switch.

2. Which ports are these VLANs associated with?

3. Which PCs are attached to which ports on the Nelson01 switch?

4. Which port connects the Nelson01 switch with the Medway router?

At the command prompt type:

Nelson01# show running-config

5. What switchport mode are the four connected ports on the Nelson01 switch in?

6. Which VLAN do each of the Nelson01 switch's ports belong to?

Make notes in your Log Book

When you have finished this part, you may proceed.

VLAN Examination Lab Part 4

View the command prompt of each of the three PCs, Student, Staff and Admin.

1. At the command prompt of EACH PC type

PC>ipconfig /all

This will give you output similar to that shown below.

Physical Address................:
IP Address......................:
Subnet Mask.....................:
Default Gateway.................:
DNS Servers.....................:

2. Make a note of the addressing information for all 3 PCs.

3. What do you notice about the subnetworks that each of the PCs belongs to? What are the subnet masks?

4. How many PCs could potentially belong to any one of these subnets (work this out from the subnet mask)?

Make notes in your Log Book

When you have finished this part, you may proceed.

VLAN Examination Lab Part 5

IOS Commands will be needed here

Open the CLI of the Medway Router.
Enter priv exec mode (use the enable command)

1. At the command prompt type:

Medway#show ip interface brief

This will give you information concerning the router's interfaces.

Interface IP-Address OK? Method Status Protocol

2. Make a note of which interfaces are 'up' in the Protocol column.

3. What are the names of these interfaces?

You will see a dot (.) in the interface name. This indicates that the interface is a SUBINTERFACE.

Read these brief notes regarding subinterfaces.

4. To which of the subnetworks in VLAN Examination Lab Part 4 above do these subinterfaces belong?

5. Does this affect your answer to VLAN Examination Lab Part 4, question 4?

6. At the command prompt type:

Medway#show running-config

This will give you some more information about the Medway router's interfaces.

7. What encapsulation is used on the subinterfaces?

8. Is there a routing protocol enabled on the router?

Make notes in your Log Book

When you have finished this part, you may proceed.

Reflection

Now that you have examined a fully operational VLANned network, you should be able to describe the necessary components of a simple VLAN.
Discuss this with a lab partner so that you are fully aware of the necessary hardware and logical information that would be required to set-up a VLAN.

Make brief notes in your Log Book concerning the necessary hardware and any logical settings that will be required to set-up a VLANned network.

Further Work (optional)

Now that you have a fully operational VLAN, save your network with a different name.

Save your network as vlan-lab-03.pkt

Attempt to add another 10 PCs to the Student VLAN.
Check your network for full connectivity when you have finished.
If you manage this, what administrative difficulties did you face?
Would it help if DHCP were enabled?
If so, where would/ could you enable this?
How would you secure the unused ports of the Nelson01 switch?

Remember to SAVE your work regularly.