[c-nsp] multiple vlans on a port

[Cord MacLeod]

I realize this is impossible, at least I have read it is on an access  
port.  So if I sent up a trunk port with the machine, does the machine  
need to speak 802.1q as well?

interface GigabitEthernet0/15
  switchport access vlan 120
  switchport trunk native vlan 120
  switchport trunk allowed vlan 100,120,231,321
  switchport mode trunk
end

The purpose of this is that the machine in a Linux machine running  
Xen, so the cloud will decide what machines and vlans it needs to spin  
up at what time.  Meaning this port will need access to these vlans.   
This being the case, will I need to configure the Linux machine for  
802.1q trunking as well?  I found this article that seemed to suggest,  
yes, but I wanted a second opinion.  http://www.linuxjournal.com/article/7268

Thanks for your help.