Hi, ns users.. I'm using ns-allinone-2.1b6 for simulating simple FTP traffics. In my TCL program, a record procedure is getting rtt_ value of TCP. The result shows that rtt_ is 0, 3, 4, 5 etc. I want to know the measurement unit of rtt_. Is it [msec] or [sec] or [100msec]? Thanks in advance. Kyohong Jin. [email protected]