[ns] A help for multicast

[Qiang Ni <niqiang1971@usa.net>]

Dear all ns users:
I am a freshman of ns.My name is Qiang Ni,a Chinese student in Hua Zhong
university of Science and technology.I am interested in multicast.
But I don't know how to creat a multicast model in ns.I use a command like
this,my current version is ns-2.1b7:
set ns [new Simulator -multicast on]
$ns multicast 
But I don't know how to attach a agent to a sender and send it to two
receivers simultaneously.Can anyone help me and send a simple code to me?
If you are convenient,can you give a simple comment for important command?
Sample topology like this:
         S1
           |
          / \
      R1 /   \ R2
I do need your help.Your reply will be sincerely appreciated.
I want to make more friends of the ns users.Please send email to me.Let's
dicuss to each other.


Yours ever
Qiang Ni
niqiang1971@usa.net 


       

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