Hi Tian, Currently there is no implementation of CBT in ns, but I am working on it and should have it ready pretty soon now. Alok Gulati Department of Electrical and Computer Engineering Louisiana State University Home phone: (504) 336-9093 On Tue, 3 Mar 1998, Bu, Tian wrote: > > I wonder whether there is an implementation of core based tree multicast > routing on NS . > > Thanks, > > Tian > >