You need to set the flow id (fid_) of the transport agent that send the packet, then map that id to a color using $ns color. See tcl/ex/srm.tcl for an example On Tue, 25 Apr 2000, Ishan Mandrekar wrote: > Which parameter of a CBR (over UDP) source needs to be modified to have it > emit colored packets, as opposed to the usual black ones? > > Thanks, > Ishan. > >