[ns] question on CBQ or priority queue

[Shuju Wu]

Hi, There,

I'm a new user of NS, in my simulation, 
I want give one kind of packet high priority 
and another kind of packet low priority, thus 
when queue size reaches the queue limit, low 
priority packet is dropped but high priority packet is 
still accepted. Is there any scheduling method 
realized in NS that can help? I think CBQ can 
help, but I don't know how to control it, set 
the parameters. Where can I find the TCL commands 
to control the parameters? NS document doesn't 
tell too much on this.

Please help a new user! Thanks

Shuju Wu