Question about VLAN QOS

The 'vconfig' command can be used to map the 'user prioirity' in a vlan tag 
(for an incoming frame) to a SkbPriority value. It is possible for example - 
to map the 'user priority' value of 0 in a incoming frame to the
SkbPriority value of 1. The question is - what happens to a incoming frame
that is devoid of any tag? In the above example, would such a frame give
rise to a SKB with priority 1?

	Thanks a lot,
				-- Megh Ranade