Re: [ns] Fw: Help! Something strange on Diffserv]

["Xiang" <ns@cdnet.edu.cn>]

Sorry, the tcl file I attached in my first email was not really attached. Here I re-post my email again.

Thank you to help me.

Xiang

I'm doing some simulation on Diffserv module, I wrote a TCL file to simulate
assured forward service.  I attach this file in this email. It is strange
that when I decrease the RIO's threshold of each logical queue, for example,
from
$qE1C configQ 0 0 40 60 0.02
$qE1C configQ 0 1 20 40 0.10
$qE1C configQ 0 2 10 20 0.20
to
$qE1C configQ 0 0 20 40 0.02
$qE1C configQ 0 1 10 20 0.10
$qE1C configQ 0 2  5  10 0.20
the number of droped packets also decreased! In my opinion since the
threshold(i.e. the buffersize) decrease, the number of packet droped because
of lack  of buffer space should increase instead. But the result is opposite
Could anybody explain? Or something is wrong in my simulation?

test5.tcl