switchport trunk encapsulation dot1q
switchport trunk native vlan x
switchport trunk allowed vlan 1,x,y,1002-1005
switchport mode trunk
switchport voice vlan y
Taken from part of the configuration.
I have some questions about this configuration.
I read from the book that native vlan are not encapsulated with any tagging information. IEEE 802.1Q adds a 4-byte tag to the frame. This protocol can operate between equipment from multiple vendors.
1) Say from this configuration, a PC is connected to vlan x. But why the vlan must not encapsulated in order for the PC to be used ?
2) Are there any command, for the PC to use without using native but is trunk?
3) Since we are using 802.1Q and it is meant for multiple vendors, why we need it to be without encapsulation?
4) Just a general question for this. For this configuration, why we need to include the vlan 1002 to 1005? I read from the book 1002 to 1005 is a default for token ring,fddi,trnet and fddinet.