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CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 


 

CCNA3 Exploration:

 

LAN Switching and Wireless

 

Guided Case Study

 


 

Student:

 


 

Date:

 


 

Marks:

 


 

WorkfileContents.doc

 


 

Page

 


 

CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 

Overview and Objectives

 

To enhance the Learner?s knowledge of switching and wireless networks.

 

The following case study is used to illustrate the process required for designing a

 

redundant switched network. This case study presents a scenario in which XYZ

 

Insurance Company has hired a Network Consultant Group to design their network. In

 

order to help you organize this project, the scenario has been divided into phases listing

 

the requirements for each task.

 


 


 


 

Configure security via VLANs and propagate with VTP.

 


 


 


 

Design a redundant switched network.

 


 


 


 

Configure switch port VLAN information and port security

 


 


 


 

Connect and verify connectivity to a wireless router

 


 


 


 

Configure the IP settings of a Linksys wireless router

 


 


 


 

Configure DHCP on a Linksys wireless router

 


 


 


 

Change the network mode and corresponding network channel on a wireless router

 


 


 


 

Enable WEP encryption and disable SSID broadcast.

 


 


 


 

Enable a wireless MAC filter if available.

 


 


 


 

Configure access restrictions on a wireless router if available.

 


 

Background

 

XYZ Insurance Company requires 24/7 access to the Internet in order to service

 

its clients. You have been retained to design a network which meets these

 

requirements. In order to achieve this, you have decided to develop the design

 

in stages proving each stage on the way. In addition some users within your

 

company are provided with wireless laptops and are allowed to log onto the

 

company?s local area network in a secure fashion. Two wireless routers are

 

provided for this for security and the Sales staff will be shared between them.

 

Unauthorised wireless laptop users must be denied access in order to preserve

 

security.

 


 

Requirements

 

The company has 3 main departments ? Personnel, Finance and Sales. The

 

offsite sales team are provided with laptops and, when in the head office, are

 

regarded as part of the Sales Department. Your design must provide for

 


 


 

5 employees in the Personnel department.

 


 


 


 

10 employees in the Finance department.

 


 


 


 

5 wired workstations and 5 wireless workstations for internal Sales staff.

 


 


 


 

100 laptops for external mobile Sales staff. .

 


 


 


 

Lifetime max of 2 servers for each department regardless of company

 

growth.

 


 

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CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 


 


 

Expect 100% growth of current IP requirements when determining size of

 

subnets.

 


 


 


 

All networking devices must have IP addresses.

 


 


 


 

Use the private class B 172.25.0.0 network for internal addressing.

 


 


 


 

Use VLSM for IP addressing.

 


 


 


 

Use subnet 200.1.1.0/29 for connection to the Internet via a router.

 


 


 


 

There is a DNS server at address 195.195.1.2/24 connected to the router.

 


 


 


 

A redundant switched network using a layered design is required with one

 

router for access to the internet. (Two routers would be needed in the final

 

analysis).

 


 

WorkfileContents.doc

 


 

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CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 

Phase 1 ? Network Design (20 marks)

 

To meet the requirements the eventual topology is shown below;

 


 

Internet

 


 

DNS Server

 

195.195.1.2/24

 


 

EXTRA

 

Fa0/0

 


 

Fa0/0

 


 

Fa0/5

 


 

Fa0/1

 


 

Fa0/5

 

Fa0/24

 

Fa0/4

 


 

Fa0/2

 


 

Fa0/24

 


 

Fa0/4

 


 

Fa0/3

 


 

Fa0/23

 


 

Fa0/1

 


 

Fa0/24

 

Fa0/2

 

Fa0/3

 


 

Fa0/23

 


 

Fa0/24

 


 

Fa0/23

 


 

Fa0/24

 


 

WRS2

 


 

Worksheet

 

1.

 


 

Produce a logical diagram based on the above diagram for the LAN for XYZ Insurance

 

Company that includes:

 

Router and switch names

 


 


 

VLAN names and details

 


 


 


 

Network addresses

 


 


 


 

Number of hosts per network

 


 


 


 

Link Speeds

 


 

The next few sections have example grids for documenting this information.

 


 

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CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 

2.

 


 

The company expects the use of VLSM Design to maximize the use of IP addresses. A

 

table is to be produced showing the subnets that meet the Companies requirements

 

using a VLSM design.

 

A sample table layout for recording the VLSM design is below.

 


 

Network Name

 


 

3.

 


 

VLAN

 


 

Number of host

 

addresses

 

required

 


 

Network

 

Address

 


 

Subnet Mask

 


 

Max Number of

 

Hosts Possible

 


 

Gateway

 

Address

 


 

For each device, a set of tables is required. These will assist with design and

 

development activities and used when configuring switches and routers. A separate

 

table should be created for each router and switch.

 


 

Below is a sample layout for routers.

 

Router Name:

 

Network

 

Name

 


 

Description and

 

Purpose

 


 

Interface/Sub

 

Interface

 

Type/Number

 


 

VLAN

 


 

Encapsulation

 


 

Network

 

Number

 


 

Interface IP

 

Address

 


 

Subnet

 

Mask

 


 

Interface/Sub

 

Interface

 

Type/Number

 


 

VLAN

 


 

Encapsulation

 


 

Network

 

Number

 


 

Interface IP

 

Address

 


 

Subnet

 

Mask

 


 

Router Name:

 

Network

 

Name

 


 

Description and

 

Purpose

 


 

WorkfileContents.doc

 


 

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CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 


 

Wireless Router Name:

 

Interface Type/Port

 


 

Description

 

and Purpose

 


 

Network

 

Name

 


 

Network

 

Number

 


 

Interface IP

 

Address

 


 

Subnet Mask

 


 

Network

 

Name

 


 

Network

 

Number

 


 

Interface IP

 

Address

 


 

Subnet Mask

 


 

Internet Port (Wired)

 

Wireless Port

 

Wireless Access Point Name:

 

Interface Type/Port

 


 

Description

 

and Purpose

 


 

Port 0 (Wired)

 

Port 1 (Wireless)

 


 

Below is the sample layout for the switch tables.

 

Distribution Switch Name:

 

Switch IP address:

 

VLAN:

 

Port/Number

 


 

Description

 

and

 

Purpose

 


 

Speed

 


 

Distribution Switch Name:

 

Switch IP address:

 

Interface/Sub

 

Interface

 

Type/Port/Number

 


 

Description

 

and

 

Purpose

 


 

WorkfileContents.doc

 


 

Duplex

 


 

VLANs

 

allowed

 


 

Switchport

 

Type

 


 

Encapsulation

 

(if needed)

 


 

VLANs

 

allowed

 


 

Switchport

 

Type

 


 

Encapsulation

 

(if needed)

 


 

VLAN:

 

Speed

 


 

Duplex

 


 

Page

 


 

CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 


 

Access Switch Name:

 

Switch IP address:

 

Interface/Sub

 

Interface

 

Type/Port/Number

 


 

Description

 

and

 

Purpose

 


 

VLAN:

 

Speed

 


 

Access Switch Name:

 

Switch IP address:

 

Interface/Sub

 

Interface

 

Type/Port/Number

 


 

Description

 

and

 

Purpose

 


 

Description

 

and

 

Purpose

 


 

WorkfileContents.doc

 


 

Network

 

Name

 


 

Network

 

Number

 


 

Subnet

 

Mask

 


 

VLAN

 


 

Switchport

 

Type

 


 

Encapsulation

 

(if needed)

 


 

Network

 

Name

 


 

Network

 

Number

 


 

Subnet

 

Mask

 


 

VLAN

 


 

Switchport

 

Type

 


 

Encapsulation

 

(if needed)

 


 

Network

 

Name

 


 

Network

 

Number

 


 

Subnet

 

Mask

 


 

VLAN

 


 

Switchport

 

Type

 


 

Encapsulation

 

(if needed)

 


 

VLAN:

 

Speed

 


 

Access Switch Name:

 

Switch IP address:

 

Interface/Sub

 

Interface

 

Type/Port/Number

 


 

Duplex

 


 

Duplex

 


 

VLAN:

 

Speed

 


 

Duplex

 


 

Page

 


 

CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 


 

4. Complete the IP design, assign and tabulate PC/workstation and server addresses for

 

each LAN in each location.

 

Although normally a DHCP server will assign PC/workstation addresses, assign all

 

addresses statically apart from the wireless network.

 

For demonstration purposes, the company agrees that it is enough to statically assign all

 

PC/workstation and server addresses and that at the access layer three 24-port switches

 

are sufficient. Stackable switches may be needed to accommodate the requirements for

 

the full implementation.

 


 

Network

 

Number

 


 

PC or

 

Server

 

Name

 


 

IP address

 


 

Subnet Mask

 


 

Gateway

 


 

Services

 

Provided

 


 

The tables and supporting text will be part of the documentation delivered to the XYZ

 

Research Company.

 

Before you commence with the implementation the logical diagram and tables need to be

 

approved by the company.

 

Instructors Signature: ______________________Date:_______________

 

For this Case Study, implement your design in phases with Packet Tracer and check out any

 

particular aspects not supported by Packet Tracer with the equipment.

 

Deliverables: Assignment with answers, Packet Tracer file and relevant configuration records

 

and testing records..

 


 

WorkfileContents.doc

 


 

Page

 


 

CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 


 

WorkfileContents.doc

 


 

Page

 


 

CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 

Phase 2: Basic Switch Configurations (5 marks)

 

Using Packet Tracer, create and connect three access switches, one distribution switch, the

 

servers and PCs together to form basic connectivity.

 


 


 

Name the distribution switch DistSW1.

 


 


 


 

Name the access switches AccessSW1 and AccessSW2.

 


 


 


 

On all switches, configure a login password as cisco, an encrypted privileged

 

password as class, and provide secure telnet login capability. All passwords should

 

be encrypted.

 


 


 


 

Connect the access switches to the PCs representing ultimately the VLANs.

 


 


 


 

Assign ip addresses to all PCs and the switches within the network 192.168.1.0 solely

 

to test connectivity. These addresses are purely temporary.

 


 


 


 

The distribution switch is connected by trunk links to the access switches.

 


 


 


 

Configure port security on the ports to which the PCs are connected with a maximum

 

of 1 and violation mode as shutdown.

 


 


 


 

DO NOT create any VLANs at this stage.

 


 

Testing

 


 

1. Is there connectivity between all devices? [Y/N] ___________

 

2. Can the PCs ping every device? [Y/N] ______________

 

3. Do the access connected ports acquire the first MAC address? [Y/N] _______

 

First MAC address _____________

 


 

4. Do the connected ports shutdown if a second PC replaces the first PC? [Y/N] _

 

Record the MAC addresses learned on each access port across all switches.

 


 

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CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 

Phase 3: VLAN Configurations (20 marks)

 

Assign the VLANs from your design to achieve security between the Personnel, Sales and the

 

IT management function of the network. Based on your Network Design in Phase 1, create

 

the networks and assign the ip addresses to the access switches and one distribution switch,

 

and the PCs and servers.

 

NB: Do not include redundancy with the second Distribution switch in this phase.

 

Steps

 

1.

 

2.

 

3.

 

4.

 

5.

 


 

Via VTP, assign version 2 to all switches.

 

Assign server mode to the distribution switch and client mode to the access switches.

 

Assign a domain and password to the switches.

 

Use VTP to propagate the VLAN database from the distribution switch.

 

Create the VLANs on the distribution switch as in your design for Personnel, Finance

 

and Sales.

 

6. Create a Management VLAN for the switches.

 

7. Assign single ports as access ports with port security as in the previous phase for

 

each VLAN on both access switches.

 

8. Configure the PCs to represent the departments and assign representative ip

 

addresses from each VLAN.

 


 

Tests

 

1. Has the VLAN database propagated to the access switches? [Y/N] ____

 

2. Test connectivity across the network for each of the three VLANs [Y/N]____

 

3. Is there connectivity between different VLANs? [Y/N] ________

 

4. Test that pings are successful from switch to switch:

 

Ping from Distribution Switch 1 to Access Switch 1 and 2? [Y/N] ________

 

Ping from Access Switch 1 to Access Switch 2? [Y/N] ___________

 

Save and print out

 

(1) Switch configurations,

 

(2) show interface trunk,

 

(3) show VLAN for each switch,

 

(4) show VTP mode and status for each switch..

 


 

WorkfileContents.doc

 


 

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CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 

Phase 4: Router Configuration (20 marks)

 

Add one router to provide inter-network communication between VLANs and simulate the

 

Internet with a web server with a home page with the text ?CCNA3 Exploration Case Study.

 

Communication successful. Your name and date?.

 

NB. Whilst this inter-network connectivity negates the security provided by VLANs, with

 

access control lists firewalls would be configured to deny or allow communication as

 

necessary.

 

Steps

 

1. Select a router with two fastethernet ports and name it Router1 with login password

 

as cisco and secret password as class.

 

2. Configure sub-interfaces on Router1 fa0/0 for the VLANs and the native VLAN. The

 

sub-interfaces become the default gateways for each of these networks.

 

3. Connect a web server with a home page to simulate the Internet for test purposes.

 

4. Add default gateways to the PCs.

 

Tests

 


 

1. Is there communication between PCs and servers? [Y/N] ________

 

2. Is there communication via the router between each VLAN? [Y/N] ________

 

3. Test that pings are still successful from switch to switch.

 

Ping from Distribution Switch 1 to Access Switch 1 and 2? [Y/N] ________

 

Ping from Access Switch 1 to Access Switch 2? [Y/N] ___________

 

4. Can each PC browse to the web server on the internet? [Y/N] ____________

 

Save and print out (1) the router configuration, (2) show ip route, (3) show protocols.

 


 

WorkfileContents.doc

 


 

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CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 

Phase 5: Wireless Configuration (20 marks)

 

Add a wireless router for mobile communication for the external Sales staff with secure

 

access to the Sales network and the wireless access point for the internal Sales staff with

 

wireless laptops.

 

NB. With Packet Tracer, full security may not be achievable on the wireless devices. If not,

 

state what additional security measures you would configure.

 

Steps

 

1. Select a wireless router with an internet port connected to the wired Sales VLAN.

 

2. Configure the wireless router internet port with a static IP address in the Sales

 

network.

 

3. Configure the wireless LAN on the wireless router with DHCP and the

 

SSID: ?ExternalXYZSales?.

 

4. Configure additional security with a WEP key and explain the addition of MAC filters.

 

5. Install a LAN wireless card in a PC and configure with DHCP selected.

 

6. Select a wireless access point and configure it with secure access to the wired Sales

 

VLAN with SSID: ?InternalXYZSales? and a WEP key.

 

Tests

 

1. Is there communication from wireless router to the Sales PCs on the wired network

 

via both access switches? [Y/N] ________

 

2. Record the IP address assigned to wireless PC via DHCP? ____________

 

3. Is wireless communication via the access point? [Y/N]

 

4. Is there communication from the wireless PCs and the wired Sales PCs?

 

Successful ping from external wireless PC to a wired Sales PC via wireless router?

 

[Y/N] ____

 

Successful ping from internal wireless PC to a wired Sales PC via wireless access

 

point? [Y/N] ____

 

5. Test that pings are still successful from switch to switch:

 

Ping from Distribution Switch 1 to Access Switch 1 and 2? [Y/N] ________

 

Ping from Access Switch 1 to Access Switch 2? [Y/N] ___________

 

6. Can the wireless PCs browse to the web server on the internet? [Y/N] ______

 

Save, capture and print out configuration of (1) wireless router, (2) wireless access point.

 


 

WorkfileContents.doc

 


 

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CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 

Phase 6: Redundant Distribution Switch (15 marks)

 

Add a second switch at the distribution level to create a redundant switched network.

 

Steps

 

1.

 

2.

 

3.

 

4.

 

5.

 


 

Add the redundant switch in server mode with the same domain and password.

 

Ensure the root bridge is one of the distribution switches.

 

Connect the redundant switch via a trunk link to the first distribution switch.

 

Connect trunk links from the distribution switches to the access switches.

 

Allow spanning-tree protocol to set the port states.

 


 

Tests

 

Enter show spanning-tree to record:

 

1. Identity of the root bridge: _____________________

 

2. Assign same priority to all VLANs.

 

3. For each switch on VLAN99record the root bridge identity, ensuring one of the

 

distribution switches is a root bridge, and the status of the trunk ports as shown

 

below:

 


 

Switch:_DistSW1__ MAC Address:__________________ Priority: ____

 

Root ID: ___________________________

 

Trunk Port

 


 

Status

 


 

Trunk Port

 


 

Status

 


 

Trunk Port

 


 

Status

 


 

Switch:_DistSW2_ MAC Address:__________________ Priority: ____

 

Root ID:

 

Trunk Port

 


 

Status

 


 

Trunk Port

 


 

Status

 


 

Trunk Port

 


 

Status

 


 

Switch:_AccessSW1 MAC Address:__________________ Priority: ____

 

Root ID: ___________

 

Trunk Port

 


 

Status

 


 

WorkfileContents.doc

 


 

Trunk Port

 


 

Status

 


 

Trunk Port

 


 

Status

 


 

Page

 


 

CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 

Switch: AccessSW2 MAC Address:__________________ Priority: ____

 

Root ID: ___________

 

Trunk Port

 


 

Status

 


 

Trunk Port

 


 

Status

 


 

Trunk Port

 


 

Status

 


 

Switch:AccessSW3 MAC Address:__________________ Priority: ____

 

Root ID:

 

Trunk Port

 


 

Status

 


 

Trunk Port

 


 

Status

 


 

Trunk Port

 


 

Status

 


 

4. Change the bridge priorities so that the other distribution switch becomes the root

 

bridge and record the states and identities as previously.

 

Save, capture and print out the output from show spanning-tree of all switches for both root

 

bridge assignments.

 


 

WorkfileContents.doc

 


 

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CCNA3 Exploration: LAN Switching and Wireless

 

(Guided Case Study)

 

EXTRA

 

Phase 7: Fully Redundant Switched Network (No marks)

 

To provide 24/7 access to the Internet, a second router would be installed with a trunk link to

 

the redundant distribution switch.

 

Steps

 


 


 


 


 


 


 

Add the second router and name it Router2.

 

Configure it in the same manner as Router1.

 

Connect the web server via a switch to Router1 and Router2.

 

Connect it via a switch to the fastethernet ports on the two routers..

 

Connect Router2 to the second distribution switch.

 


 

Tests

 


 

1. Access the web server from all PCs? [Y/N] ________

 

2. If DistSW1 fails, can all PCs still access the Internet. [Y/N] _____

 

NB. Default gateway of web server may need changing.

 

Save and print the port status for the surviving Distribution switch.

 

3. If Router1 fails, can all PCs still access the Internet. [Y/N] _____

 

NB. Default gateway of web server may need changing.

 


 

------ END of CASE STUDY-----

 


 

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