Jeremy’s IT Lab - CCNA 200-301 Ethernet LAN Switching Lab

Introduction

• Course: Complete and free CCNA 200-301 course.
• Focus: Ethernet LAN Switching concepts from day 5 and day 6 videos.
• Network Topology: Two switches each connecting two PCs.

Lab Overview

1. Initial Network State:
   • Both switches have empty MAC address tables.
   • All PCs have empty ARP tables.

Step 1: PC1 Pings PC3

• Objective: Determine messages sent over the network and recipients.
• Process:
  • ARP Request:
    • Sent by PC1 to find PC3’s MAC address.
    • Broadcast message received by all devices (PC2, PC4, SW1, SW2) except PC1.
  • ARP Reply:
    • Sent by PC3 to PC1.
    • Unicast message passing through SW2, SW1, received only by PC1.
  • ICMP Echo Request:
    • Sent by PC1 to PC3.
    • Unicast message received only by PC3.
  • ICMP Echo Reply:
    • Sent by PC3 to PC1.
    • Unicast message passing through SW2, SW1, received only by PC1.
• Note: Multiple pings are sent (4 by default on Windows PCs).

Step 2: Verification with Packet Tracer

• Simulation Mode: Used to visualize message flow.
• Ping Command: Typed in command prompt (ping 192.168.1.3).
• Observation:
  • ARP and ICMP messages appear confirming process.
  • Ethernet header fields (Preamble, SFD, etc.) reviewed.

Step 3: Learning MAC Addresses

• Objective: Let switches learn MAC addresses.
• Process:
  • PC1 to PC3 Ping: Reinforces MAC learning on switches.
  • PC2 to PC4 Ping: Allows switches to learn additional MAC addresses.

Step 4: Identifying MAC Addresses

• Show Commands:
  • On SW1: show mac address-table
    • Identify PC1 (FastEthernet 0/1) and PC2 (FastEthernet 0/2) MAC addresses.
  • On SW2: show mac address-table
    • Identify PC3 (FastEthernet 0/1) and PC4 (FastEthernet 0/2) MAC addresses.

Step 5: Clearing MAC Address Tables

• Objective: Clear dynamic MAC addresses.
• Command: clear mac address-table dynamic
  • Applied on both SW1 and SW2.
• Verification: Use show mac address-table to confirm tables are empty.

Conclusion

• Lab Completion: Successfully completed all steps.
• Call to Action: Subscribe, like, comment, share, and support via BAT on Brave browser.