IPFW, queue and weight

[vladone]

I have some problem. After i post some message i understand that with
dummynet u can't make traffc priority, only bandwith management.
U can manage bandwidth with pipe or queue (weight option).
Weight parameter is used to specify how is alocate bandwidth from a
pipe which is shared to different queue.
For traffic hierarchy u can try to use altq with ipfw (need some
patches, i dont try't) or pf+altq.
But notion of priority is a little strange. What is priority?
Most common, is a situation when an packet is send before another. But
if more packets are sended before anothers, this don't means hight
bandwith?
Very strange this notion, if someone can be more clear, please!