How to obtain fixed packet loss ?

[nangergong]

Hi, all:

  As far as I know, in dummynet, plr is prabability-based, namely, when a
packet is processed, it will be discarded according to the probability. So,
if I have 100 packets and the plr is 5%, eventually I may just discard 3
packets or even 1 packets. So, the real packet loss is not consitent with
the plr-set value. Is there any good method that can give me a consistent
packet loss? Thank you!