Native VLAN mis-match!

Описание: I've had a bunch of questions on this topic so let's lab it up! OK, so we know that most switch vendors start their switch ports in either VLAN 1 or no VLAN. VLAN 1 is called the management VLAN. Why? Because it's native and native means that it is untagged (see my trunk videos). So what happens when two switches are connected and they do not agree on the native VLAN?

For more VLAN content on the channel:
VLANs and RSTP:    • VLANs and RSTP - will it blend?  
VLANs and Trunks:    • VLANs and Trunks  
802.1Q and Rapid Spanning Tree:    • 802.1Q and Rapid Spanning Tree  
Packet Tracer VLAN intro:    • Packet Tracer VLANs!  
Basic Packet Tracer Routing VLANS:    • Packet Tracer - Another look at routers an...  
VLANs and Trunks intro:    • VLANs and Trunks  
A little older
VLANs and Trunks part 1:    • O'Reilly Packet Guide to Routing and Switc...  
VLANs and Trunks part 2:    • O'Reilly Packet Guide to Routing and Switc...   (current)
VLANs and RSTP:    • VLANs and RSTP - will it blend?  

Here's the Routing and Switching book:
Packet Guide to Routing and Switching: https://www.oreilly.com/library/view/...

For more Packet Tracer or Routing/Switching, take a look at these playlists:

   • Packet Tracer  

   • Routing and Switching  

Books and other products for networkers

Packet Guide to Core Network Protocols: https://www.oreilly.com/library/view/...

Packet Guide to Voice over IP: https://www.oreilly.com/library/view/...

Network Engineering Fundamentals: https://www.oreilly.com/videos/networ...

Advanced Network Engineering: https://www.oreilly.com/videos/advanc...

Virtualization, Networking, and Storage: https://www.oreilly.com/videos/virtua...