You don't need it. It draws numbers from the default rng and hence is unlikely to synchronize. - Haobo On Fri, 7 Apr 2000, r7725029 wrote: > hi all... > If I create several CBR traffic sources. > Do I need to use RNG to set different starting time > for each sources? > NS will avoid sychronization automaticlly? > > thanks a lot... > > Jay... >