You may want to refer the following page first. http://www-mash.CS.Berkeley.EDU/ns/ns-problems.html - Hyunah > PLease help me me. I am with a problem to install ns2.1b6 on a RedHat > 6.1. Are them compatible? I am suffering when I trying to configure NS > but happens some errors. What I have to do? ThanksZATTAR