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CE231 – Assignment 1: Routing and Switching Essentials

Dr Mays AL-Naday

Submission files (one spreadsheet book, one word document, one Packet Tracer file):

- One Spreadsheet document: you will submit a SINGLE Excel Sheet containing three tabs to provide your answers to Task 1 and Task 2. A template Excel file (design_template.xlsx) is provided with the assignment on CE231 Moodle Page.

- One Word document: you will submit a SINGLE word-processed document providing your answers to Task 3 and Task 4. A template word-formatted file (configurations_and_stp.docx) is provided with the assignment on CE231 Moodle Page. The submitted document can be in one of the following formats:

o Word format (.doc  or .docx)

o Portable document format (PDF)

- One Packet Tracer File:  you must submit your working Packet Tracer file with the SAME configuration as that given in the word document.

Assignment guidelines:

- Two template documents are provided with the assignment that you can use to append your answer: a MS Excel Sheet for your design questions and word document for your practical configurations and STP

- Download the templates to your own machine or M drive, rename each file adding your registration number to the start of the filename. For example, if your registration number is 123456 then rename your design sheet to 123456_design.xlsx and your word document to 123456_configurations_and_stp.docx

- Design sheet:

o Task 1 tab: complete blank fields with appropriate details under each column. This records your design work of Task1

o Task 2.A tab: change X, Y to your unique combination of switches and complete blank fields, following your design work of Task 2.A

o Task 2.B tab: change X, Y, Z to your unique combination of switches and complete blank fields, following your design work of Task 2.B

o Definitions of the column headers in the design sheet are provided in a first tab in the template, for your information only. 

- Word document:

o Append the configurations of your select switches and router (only the output of “show running-config”) under the configurations section. This shows practical work you did in Task 3

o Append your answers of Task 4 under the respective headings within the STP section.

- Packet Tracer file:

o You MUST use the same Packet Tracer version as that installed in CSEE Labs for this assignment, it is available for download from the CE231 Moodle page (or Cisco Network Academy site).

o Your configurations in your Packet Tracer file MUST match those provided in the word document.

- You must submit all three files to answer all parts.

The marking scheme of the whole assignment is:

· Task 1 – Design VLAN-Subnet Addressing Scheme: 20%

· Task 2 – Design VLAN port assignment Scheme: 25%

· Task 3 – Practical Network Configuration and Documentation: 25%

· Task 4 – SPT Configuration and Analysis: 20%

· Task 5 – Submission of Packet Tracer file: 10%

NOTE: this document is a generic description for the whole group. Every student also has a unique combination of settings, distributed through the CE231 course pages. Under no circumstances should you use values allocated to another student – doing so will give rise to an investigation of plagiarism. You will find your own individual settings on the CE231 course page using your Student ID as a key to your individual page.

  

Figure 1 Assignment topology

Scenario

You are hired to design a company’s network that is shown in Figure 1. In this assignment, you have been given a unique combination of settings:

- An IP range purchased by the company

- A set of VLAN Identifiers (VIDs) for the network VLANs

- Number of hosts per VLAN per location.

- X, Y, Z: uniquely selected for you, a subset of switches in the network that represent part of your VLAN design scheme (Task2). The switches are also the ones used in your practical work (Task 3).

You can access this information via a webpage named with your student number, from CE231 Moodle page.

You are required to use your unique combination in working out the assignment tasks.

Task 1: Design a per VLAN Subnet Addressing Scheme

Use the IP address range allocated to you to create a subnet addressing scheme that accommodates hosts of all VLANs in the network.
- Each VLAN must be allocated its own subnet address, and the subnet address range must be sufficient to accommodate all hosts of the VLAN in all locations.
- You must begin the subnet address assignments at the address given to you on your own unique page from the CE231 Moodle page.
- You must allocate host IP addresses in a contiguous range, starting from the first usable address in the subnet. For example: if a subnet has 20 hosts in total and the subnet address is x.y.z.0/24, the first host IP should be a.b.c.1/24 and the last is a.b.c.20/24.
- A router subinterface counts as one host that needs to be added to the number of hosts allocated to you - so for example having “29 hosts” means you actually need to count 30: 1 router subinterface + 29 hosts
Document your subnet addressing scheme in Task1 tab of your design spreadsheet, filling blank fields for each VLAN with appropriate details under the respective columns. An example entry is included in template design sheet, provided with the assignment description.

Task 2: Design a VLAN port Assignment Scheme

Use the topology diagram and your allocated settings of: VIDs and number of hosts per VLAN per switch to create a port assignment scheme, that shows:
A. End devices: Hosts on each VLAN on a switch are allocated a port range (i.e. contiguous set of ports) on the switch with suitable switchport mode. Your design should specify the VID(s) allowed on the port range. Document this part of your scheme in Task2.A tab of your design spreadsheet, filling in empty fields with the appropriate details for each column.
B. Network: For each switch connection (a.k.a. link) to another switch, assign a unique port from the remaining free ports and specify: the appropriate switchport mode and the VID or set of VIDs carried on the link.

• Network: Document this part of your scheme only for switches X, Y, Z (uniquely sampled for you). Provide the documentation in Task2.B tab of your design spreadsheet, filling in empty fields with the appropriate details for each column.

Task 3: Create, Configure and Document the network

Create the network topology of Figure 1 using Packet Tracer, by connecting all switches as shown in the figure. Use the same version of Packet Tracer as that provided on CE231 Moodle Page. Ensure that ports used to connect X, Y, Z, Gateway (i.e. the router in Figure 1) devices to each other follow the scheme you have created in Task 2 (B) and shown in Task2.B tab of your design sheet. For end devices (i.e. PCs) only create the first and last PC per VLAN per switch.

End Devices: Connection and IP configuration

- Connect first and last PCs only of each VLAN to their respective switches X or Y. Note that ports used to connect PCs must be the same as those you have assigned in your scheme design of Task 2 (A) and shown in Task2.A  tab of your design sheet. Connect the first PC to the first port in the range and the last PC to the last port in the range.

- Configure first and last PCs only with the respective IP addresses you have allocated them in Task 1. Your PCs network configuration must follow the scheme you provide in Task1 tab of your design spreadsheet.

Network Devices: Connection and Basic Device configuration

Connect Gateway (i.e. the router) to switch Z from your unique settings. Note that the Gateway interface and switch Z port must be the same as those you have assigned in your scheme of Task 2 (B).

Configure only network devices: X, Y, Z and Gateway with basic settings according to the following guidelines:

- Network devices should be secured against unauthorised access and passwords should be stored in a secure manner. Use only the password “cisco” in your configurations

- There is no DNS server in the network, therefore network devices should not attempt to resolve FQDNs.

- Configure a message-of-the-day banner that warns against unauthorized use and states “This device is managed by 0123456”, where 0123456 is replaced with your registration number

- Connected interfaces to have a description in the form ‘SW/PN’, replace SW and PN with the destination switch and port number at the other end of the link, respectively.

- All unused ports must be shutdown. 

Network Devices: VLAN and inter-VLAN routing Configurations

- Configure connected ports on devices: X, Y, Z with the VID(s) and switchport mode you have assigned for them in your design from Task2. Note, if during configuration you discover that you have made a design error, you should update your design (Task2) to fix the error. Ultimately the configuration should match the design.

- Configure Gateway interface connected to switch Z with sub-interfaces to enable inter-VLAN routing across the VLANs subnets you have designed. Each sub-interface must have the VID of the VLAN it belongs to, and must be configured with the IP address you have assigned for it in your subnet scheme design (Task 1).

Network Documentation

Provide the configurations of devices: X, Y, Z and Gateway in the one (single) word document, under the respective heading title showing the device name. Use the MS Word template provided with the assignment, named configurations_and_stp.docx, to provide your answer.

Document the configurations of each of the four devices:

- Run the command show running-configurations in each of these devices

- Copy the shown configurations from the CLI of the respective device and Paste them into the word document, under the heading titled with the device name.

- Make sure to save the word document, to preserve your answer of the configurations part of it.

Task 4: STP configuration and Analysis

Populate your answers to this Task under the STP respective headings, in your copy of the word document configurations_and_stp.docx

After STP has converged in your network, investigate the operation of STP – in particular:

1. Identify and state which switch have been elected as the Root Bridge in your topology, and explain this election outcome. Aid your answer by providing the command you ran to investigate STP details and the outcome of running the command on the Root Bridge.

2. Provide a screenshot of your STP-converged network and briefly describe why certain ports are blocked.

3. Does the current Root Bridge have the best position in the topology to assume this important role? Justify your answer in either case, be it Yes or No.

4. Change the STP topology, ensuring that HQ gets elected as the Root Bridge. This requires you to configure STP in HQ and the other switches. Provide the command you used to configure STP on HQ, and wait for the STP network to reconverge.

5. Provide a screenshot of your network after STP reconvergence and HQ becoming the new Root Bridge.

6. Briefly outline if the set of blocked ports has changed when HQ became the Root Bridge and why the change (or why they haven’t changed).

Task 5: Submission of Packet Tracer File

- Save the running configurations in each network device to the startup configurations.

- Make sure to submit the Packet Tracer file of your network along with your design spreadsheet and answers document configurations_and_stp.docx

IT IS VITAL THAT YOUR PACKET TRACER FILE CONTAINS THE SAME CONFIGURATIONS THAT YOU SUBMIT IN THE WORD DOCUMENT. ANY FAILURE TO DO SO WILL MEAN ZERO MARKS FOR TASK 5 AND THE MARKER MAY TAKE THE LOWER OF THE FUNCTIONALITY IN EITHER OF THE DOCUMENTATION OR CONFIGURATIONS.

End of Assignment