[ns] enabling ECN in ns2

Hi, I was trying to enable ecn capability in ns2 by setting agent/tcp ecn_ 1. But in the trace file(wired network) only the first of the seven flag fields show "C". I guess its just ecn echo. Could someone please help me with this. Regards, Keerthi

[ns] Help with modify_p function in RED

Could someone please help me understand the modify_p function in code for RED. Why is this function called after calculate_p_new Keerthi

[ns] How to change default values in ns-default.tcl

Hi, I want to change some of the default values of RED protocol in NS. I tried setting new values in ns-default.tcl and re-compiled, but when I run the simulation NS uses the old default values instead of new ones. Can anyone please tell me how to change the default values in ns? Thank you, Keer

[ns] Modifying RED

Hi all I am trying to modify the packet dropping probability function of RED in ns2. Can someone please help me with the implementation? Any help will be greatly appreciated. Thanks