Lab 2

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Rochester Institute of Technology *

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241

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Electrical Engineering

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Dec 6, 2023

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docx

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NSSA 241 Lab 2 – Introduction to Switching - Netlab Name: Gabriel Arias Lacruz These questions are to be answered based on the lab experience and are due before the drop box closes. Use this report template to answer all questions accurately, typed, and with computer generated diagrams, if and where applicable. Report Templates, including empty tables, must remain unchanged with the exception of (1) an author’s name, (2) tables filled in and (3) answers to each question in place of the following: <Replace this line with the answer using as much space as required> Activity 1 (6 points) – Construct Basic Single Switch Network 1. Record the MAC and IP address for each PC on the bench in the table below. IP Address MAC Address PC1/4 192.168.100.84 00-68-EB-BC-35-46 PC2/5 192.168.100.85 EC-B1-D7-45-0F-73 PC3/6 192.168.100.86 00-68-EB-BC-3A-2F Activity 3 – (6 points) - Exploring the Switch Source Address Table 2. Record the SAT entries in the table below. Explain step by step how this SAT table was built considering the messages (pings) that have been sent on your network. In other words, how did the entries get added to the table? Switch Port PC Mac Address PC Name (PC1, PC2, PC3 etc.) Gil/0/41 0068.ebbc.3546 PC 4 Gil/0/45 0065.ebbc.3a2f PC 6 Gil/0/43 ecb1.d745.0f73 PC 5 The SAT entries were populated when PC 4 and PC 6 pinged PC 5. When a device on the network communicates with another device, the switch records the MAC address of the sending device along with the corresponding switch port in its SAT. 2205 –SPH/SPM Page 1
NSSA 241 Lab 2 – Introduction to Switching - Netlab Activity 4 (12 points) – Examining Switched Traffic Flow 3. Use the table below to identify the ping results and explain why each ping is visible or not on each segment. Be sure to reference the switch SAT in your answer. Wireshark observing from Is ping visible (yes/no) Explain why the ping is visible or not PC 1/4 Yes PC 4 is pinging PC 5 on a switch therefore you will see the traffic PC 2 /5 Yes PC 5 is being pinged by PC 4 on a switch therefore you will see the traffic PC 3 /6 no Information between two computers cannot be shared on the third computer, because the computers are connected by a switch not a hub. Activity 6 (26 points) – Layer 2 Traffic Flow with Multiple Switches Expanded 4. Record the current contents of both switch SATs. Use more or fewer lines as necessary. Include all dynamic entries. Switch 1 (PCs 1-3) Switch Port PC Mac Address PC Name (PC1, PC2, PC3 etc.) Gil/0/12 001d.7148.7a8b Switch F Gil/0/12 Ecb1.d740.d9f2 PC 2 Gil/0/45 0068.ebbc.3a2f PC 6 Gil/0/12 0068.ebbc.3546 PC 4 Gil/0/43 Ecb1.d745.0f73 PC 5 Switch 2 (PCs 4-6) Switch Port PC Mac Address PC Name (PC1, PC2, PC3 etc.) Gil/0/11 001d.46f4.dc8c Switch E Gil/0/11 0068.ebbc.3a2f PC 6 Gil/0/2 Ecb1.d740.d9f2 PC 2 Gil/0/11 Ecb1.d745.0f73 PC 5 Gil/0/17 0068.ebbc.3546 PC 4 5. Explain what is different from the previous experiment with only your single bench switch and why. Consider what the switch may be doing as a result of the reconfiguration (see list 2205 –SPH/SPM Page 2
NSSA 241 Lab 2 – Introduction to Switching - Netlab above). Are the entries for MAC addresses other than the PCs? If so, explain what devices they are for and why they are needed. The SAT entries were populated at the moment of both PC4 and PC6 pinging PC5. When a device on the network communicates with another device, the switch records the MAC address of the sending device along with the corresponding switch port in its SAT. Data has to go through the port that the opposing switch is connected from, which is why the PCs on the opposite bench have the same switch port as the port to the switch. 6. Use the table below to identify each of the ping results and explain why each is visible or not on each segment. Be sure to reference the switch SAT in your answer. PC5 pings PC6 Wireshark observing from Is ping visible (yes/no) Explain why the ping is visible or not PC 4 no Not part of connection between PC 5 AND 6 PC 5 yes Part of connection and ping to PC 6 PC 6 yes Part of connection and was pinged by PC 5 PC 2 no Not part of connection between PC 5 AND 6 PC 4 no Not part of connection between PC 5 AND 6 PC 5 yes Part of connection and ping to PC 6 Activity 7 (25 points) – Pinging Across Switches 7. Record the SAT entries on both switches in the tables below. Use more or fewer lines as needed. Include all dynamic entries. Are there entries for MAC addresses other than the PCs? If so, include them. What device(s) are they for? Switch 1 (PCs 1-3) Switch Port PC Mac Address PC Name (PC1, PC2, PC3 etc.) Gil/0/12 001d.7148.7a8b Switch F Gil/0/12 Ecb1.d740.d9f2 PC 2 Gil/0/45 0068.ebbc.3a2f PC 6 Gil/0/12 0068.ebbc.3546 PC 4 Gil/0/43 Ecb1.d745.0f73 PC 5 Switch 2 (PCs 4-6) Switch Port PC Mac Address PC Name (PC1, PC2, PC3 etc.) Gil/0/11 001d.46f4.dc8c Switch E 2205 –SPH/SPM Page 3
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