Re: [ns] Help : Multicast

[Haobo Yu <haoboy@isi.edu>]

You probably want to look at how SRM is implemented in ns. I think you'll
need to implement your own agent for this protocol, but this agent should
be very simple and you can easily build it by extending udp. 

On Mon, 10 Apr 2000, Chirdeep Chhabra wrote:

> Hi NS users,
> I want to simulate some multicast protocols. If someone has been doing
> some simulations in multicast I need some help at the earliest. I have
> been trying to simulate a protocol typically :
> 
> To atomically broadcast a message m, a process p must wait for the
> token. When it holds the token, P broadcasts (all are members of the
> group) m to the other processes and passes the token to the next
> process. The message m can be delivered (accepted by the upper layed )
> only after it has been acknowledged by all processes. The
> acknowledgements of messages are carried by the token. So m is delivered
> by the last process only after two round trips of the token.
> 
> This is one of the simple multicast protocols I need to simulate. Could
> you pls let me know if it is possible to simulate such protocols in NS.
> I have been trying simulate without much success. If someone has done
> something like above of something simpler (acknowledgements to all
> members after receiving message etc) pls send me the script. Will I need
> to create new agents to do the simulation ??
> I would be greatful for any help
> 
> sorry for the huge mail
> thanks
> -chirdeep
> 
>