Hi friends,

The Native VLAN is frequently a sore spot for CCNA candidates. I've written about it before, but I wanted to spend a little more time to focus on this (understandably) confusing topic.

As such, I created a 5 minute video which not only explains the Native VLAN, but shows you the effect it has using Wireshark on traffic traversing a trunk.

https://www.youtube.com/watch?v=Fmq1E1Qr2W4

In the video, I capture packets traversing a trunk on VLAN 22 and 33, with the default Native VLAN configured. Then I change the Native VLAN to 33, and send the same pings to show you how they are different after the change.

If you already know the Native VLAN and just want to see the cruz of the explanation (skipping the topology introduction, and initial pings), go ahead and start at 2:14

Hope it helps. Any feedback is welcome.