CSN105_SubnettingNetwork

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Seneca College *

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105

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Computer Science

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Dec 6, 2023

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13

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Subnetting a Network TERM NAME – Student ID COURSE CODE WEIGHT Vick Panchal - 020073151 CSN105 8% Lab Objectives Upon completion of this lab, you will be able to perform the following: Subnet a network based on network requirements Configure IP addressing on network devices Configure a router to route traffic from different networks Troubleshoot and resolve network connectivity issues Lab Materials Pre-Lab Video: Explanation Cisco Packet Tracer Network assigned to you in Blackboard under “My Grades” Lab Instructions Install Cisco Packet Tracer or run application from MyApps Launch software and perform lab Enter your name and student ID above (Example: david – dtrinh) Answer questions and add screenshots into the corresponding textboxes Save the file on your computer for future reference Academic Integrity Declaration By beginning this lab, I affirm that I will not give or receive any unauthorized help in this lab and that all work provided will be my own. I agree to abide by Seneca’s Academic Integrity Policy, and I understand that any violation of academic integrity will be subject to the penalties outlines in the policy.
CSN105 – Introduction to Computers and Networks Page 2 of 13 Save the file again as a “ .pdf ” file Submit the PDF file for grading Seneca College School of ITAS
CSN105 – Introduction to Computers and Networks Page 3 of 13 Part 1: Network Scenario You are working for Seneca College’s ITS Network team. The School of Information & Communications Technology has increased enrollment over the last 5 years. Due to enrollment increase, the school will split into 2 schools: Information and Technology Administration & Security (ITAS) Software Design and Data Science (SDDS) In our scenario, we will require 1 subnet for each school (2 subnets). Use the network assigned to you in Blackboard. Part 2: ICT Network Topology 1. Using Packet Tracer, create a single network with 8 computers. Router: Model 2811 Switch: Model 2960 2. Connect each computer to the switch using an appropriate network cable. 3. Change the display name of the switch to ICT. 4. Connect the switch to the router using an appropriate network cable. Record the router port used to connect to the switch. 5. Under the router properties, ensure all the ethernet ports are powered on. 6. Configure the 1 st available IP address as the router’s IP address. 7. Configure an IP address for each PC on the network within the network range. Remember to configure a gateway for each PC. 8. Change the display name of each PC to its IP address with subnet mask. 9. Confirm a PC can ping another PC successfully. 10.Confirm a PC can ping the router successfully. Seneca College School of ITAS
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CSN105 – Introduction to Computers and Networks Page 4 of 13 Example: Include display label and ping response Seneca College School of ITAS Screenshot 2.0: “ping” response from a PC and router [1 mark]
CSN105 – Introduction to Computers and Networks Page 5 of 13 Part 3: ITAS / SDDS Network Topology 1. Using the existing network, subnet this network to support 2 subnets. IP Address Subnet Mask 158.158.158.0 255.255.255.128 158.158.158.128 255.255.255.128 2. Calculate the valid ranges for each subnet. First available IP Last available IP Seneca College School of ITAS Screenshot 2.1: ICT Network Topology [1 mark] Subnet ID for each subnet with correct subnet mask [1 mark] Ranges for each subnet [1 mark]
CSN105 – Introduction to Computers and Networks Page 6 of 13 Subnet 158.158.158.0 158.158.158.1 158.158.158.126 158.158.158.128 158.158.158.129 158.158.158.254 The school of ITAS will use Subnet #1 and SDDS will use Subnet #2. ITAS will use the first available IP address for their gateway. SDDS will use the last available IP address for their gateway. 1. Add another switch [model 2960] and reconnect 4 PCs to this switch. 2. Change the display name of this switch to “SDDS”. 3. Change the display name of “ICT” to “ITAS”. 4. Connect the switch “SDDS” to the router using an appropriate network cable. Record the router port used to connect to the switch. ITAS Network 1. Recalling the router port used for the ICT network, configure this port with the first available IP address for Subnet #1. 2. Configure each PC with an appropriate IP address. 3. Change the display name of each PC to its IP address with subnet mask. SDDS Network 1. Recalling the router port used for the SDDS network, configure this port with the last available IP address for Subnet #2. 2. Configure each PC with an appropriate IP address. 3. Change the display name of each PC to its IP address with subnet mask. Seneca College School of ITAS
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CSN105 – Introduction to Computers and Networks Page 7 of 13 Seneca College School of ITAS Screenshot 3.0: “ping” response from a ITAS PC to a SDDS PC [1 mark] Screenshot 3.1: ITAS / SDDS Network Topology [1 mark]
CSN105 – Introduction to Computers and Networks Page 8 of 13 Part 4: Subnetting ITAS Network The school of ITAS has decided to divide their department into 2 sub-schools: Technology Administration (TA) Information Security (IS) 1. Using the ITAS network, subnet this network to support 2 subnets. 2. Calculate the valid ranges for each subnet. Seneca College School of ITAS Subnet ID for each subnet with correct subnet mask [1 mark] IP Address Subnet Mask 158.158.158.0 255.255.255.192 158.158.158.64 255.255.255.192
CSN105 – Introduction to Computers and Networks Page 9 of 13 Ranges for each subnet [1 mark] Subnet First available IP Last available IP 158.158.158.0 158.158.158.1 158.158.158.62 158.158.158.64 158.158.158.65 158.158.158.126 The school of TA will use Subnet #1 and IS will use Subnet #2. TA will use the first available IP address for their gateway. IS will use the last available IP address for their gateway. 5. Add another switch [model 2960] and reconnect 2 PCs to this switch. 6. Change the display name of this switch to “IS”. 7. Change the display name of “ITAS” to “TA”. 8. Connect the switch “IS” to the router using an appropriate network cable. Due to the limited ports on the router, we cannot connect “IS” to the router. Seneca College School of ITAS
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CSN105 – Introduction to Computers and Networks Page 10 of 13 We have a few options to resolve this issue: 1. Replace the router This can be done without routing. 2. Introduce another router This will require us to understand routing (next lesson). Part 5: Replacing the router SDDS Network 1. Remove the existing router and replace it with the 2911 router. 2. Reconnect the SDDS network to the router. Remember to power on all the ports on the router. 3. Under the router properties, configure the port connecting to the SDDS network with the same IP address used before. Seneca College School of ITAS Screenshot 4.0: Current TA / IS / SDDS Network Topology [1 mark]
CSN105 – Introduction to Computers and Networks Page 11 of 13 4. Confirm the SDDS PCs can ping the router and each other. TA Network 1. Reconnect the TA switch to the router. 2. Under the router properties, configure the port connecting to the TA network with the IP address specified earlier. 3. Update the PCs IP configuration with the new subnet and gateway information. 4. Confirm the TA PCs can ping the router and each other. IS Network 1. Connect the IS switch to the router. 2. Under the router properties, configure the port connecting to the IS network with the IP address specified earlier. 3. Update the PCs IP configuration with the new subnet and gateway information. 4. Confirm the IS PCs can ping the router and each other. Confirm each PC on different networks can “ping” each other. Seneca College School of ITAS Screenshot 5.3: “ping” response from TA PC to IS PC [1 mark]
CSN105 – Introduction to Computers and Networks Page 12 of 13 Seneca College School of ITAS Screenshot 5.4: “ping” response from TA PC to SDDS PC [1 mark] Screenshot 5.5: “ping” response from SDDS PC to IS PC [1 mark]
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CSN105 – Introduction to Computers and Networks Page 13 of 13 Save the Packet Tracer file. This file will be used for the next lab. We had to change the router and add more switches. This caused us to also change all the IP’s and host ranges, knowing this all ahead of time would have saved a lot of time and effort. Seneca College School of ITAS In our lab, we started with a single network and subnetted the network. Later we subnetted a subnet. If we knew about all the departments ahead of time, how would you subnet your network differently? Calculate all subnets and valid ranges. [3 marks]

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