Can someone explain to me in non-book terms what the native vlan is used for. In other words, I know that the native vlan is the vlan that untagged traffic travels over. And even when you ask people, they say the same thing. However, when do you use this untagged vlan and how does that apply in the real world. Why would we ever change it from vlan 1? Why when you are configuring a switchport connected to a WLC or a AP, does it recommend setting the native vlan to the same vlan (subnet) as the management interface or even in some cases the data vlan? If I remember correctly, the native vlan is what also carries information for the link such as STP, VTP. Again, why change it from the default vlan 1.
I have this problem too.