About queue state snooping

[pdzhu <pdzhu@csit.edu.cn>]

Dear All,

I try to trace the queue data,i.e., just like "test-suite-red.tcl".
But my "all.q"  is empty. Can you tell me  why?

Great thanks.

	---zhu 

-----------------My tcl script is as follows ----------
proc createtestnet {} {
	      ...
	ns_duplex $r1 $r2 8Mb 0.001ms red 
	      ...
}	

proc enable_tracequeue  { } {
	global r1 r2
	set redq [[ns link $r1 $r2] queue]
	set tchan_ [open all.q w]
	$redq trace curq_
	$redq trace ave_
	$redq attach $tchan_
}

proc test_two_drops {} {
        ....	
   enable_tracequeue
   ns at 1.0 "$ftp1 start"
	....
}