Does anybody knows how VTP protocol is transported over a trunk. Is it carry on default VLAN 1, what is happening to VTP when native VLAN is not configured on VLAN 1? Can a misconfiguration on default VLAN 1 cause problem to VTP?
Also would like to know if there is a system message associate to VLAN 1 being down. I saw on a CCNA test question where there was a message about problem with default or VLAN 1.
native vlan mean the trunk port will not tagged the packet with vlan No.
for example : 2 switches connect by trunk and you configure in sw 1 native vlan 2 and sw 2 native vlan is vlan 1
then you will get error native vlan mismatch , that mean must native vlan in sw 1 and 2 is the same vlan
by default all control messages (STP , VTP , ...) is send it between switches by vlan 1
and the default if configure a trunk port native is VLAN 1 (you dont need to configure it)