Uploaded August 2025 | Updated September 2026, 3 weeks ago

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This VLAN lab follows the same premise as lab questions on the actual CCNA exam. To practice troubleshooting VLAN and VLAN trunk issues with Cisco Packet Tracer, I’ll give you a .pkt file and a campus LAN design. I created a working LAN – but then I broke the configuration in several ways. Your job: Figure out how the broken parts of the configuration fix them. The video describes the details! The .pkt file is linked for download in the description.

📘 Matches CCNA Official Cert Guide:
*Volume 1 Chapter 8 Section 3*

*Chapters*
00:00 Intro
00:22 Lab Instructions
01:23 Lab Demo: Fix the Trunks
03:02 Lab Demo: Fix Trunk Allowed Lists
04:00 Lab Demo: Add Back a VLAN

*The Related Instructional Video – “VLAN Troubleshooting”*
📽️ youtu.be/QqQlnwLpdNQ

*The Packet Tracer File for this Lab*
🔗 files.certskills.com/yt/vol1-ch08-03-adhoc.pkt