Re: [ns] Urgent Help Needed Please.

[Vinay Joseph Ribeiro <vinay@owlnet.rice.edu>]

Hi Ravi,
	I believe you can use a "traffic trace" for n1. In ns you can
specify packet sizes and time between packets with this method. However,
the only randomness here is that ns chooses a random starting point from
your trace file. 

This is described in chapter 30 of the ns manual (Applications and 
transport agent).

Vinay

Rice University | vinay@rice.edu | www.ece.rice.edu/~vinay | 713.348.2285

On Sat, 4 Nov 2000 Ravikanth.Samprathi@asu.edu wrote:

> 
> 
> ---------- Forwarded message ----------
> Date: Fri, 3 Nov 2000 19:13:58 -0700 (MST)
> From: rksv357@imap2.asu.edu
> To: ns-users@mash.cs.berkeley.edu
> Subject: Urgent Help Needed Please.
> 
> Hi ns-users,
> I have three nodes - n1, n2 and n3.
> n1 is connected to n2 and n2 is connected to n3.
> n1-------n2--------n3.
> 
> Problem-1:-
> I need to generate packets from n1 with different packet sizes and
> different intergeneration times. How can i do this?
> 
> Problem-2:-
> n2 must pass the packet on to n3 using some packet-scheduling algorithm.  The
> time taken by n2 to process a packet must be equal to the size of the packet.
> How can i do this?
> (Note:- problem is not in creating the packet-scheduling algorithm. I have
> already implemented the packet-scheduling algorithm.  problem is in the
> generation and processing of packets with different packet sizes and inter
> generation time.)
> 
> Please anyone, help me.
> I need to do this very urgently.
> 
> Any help/references will be extremely appreciated.
> Thank you,
> Regards,
> ravi
> 
> 
> ---------- Forwarded message ----------
> Date: Wed, 01 Nov 2000 21:58:43 -0300 (EST)
> From: Carlos Alberto Kamienski <cak@cin.ufpe.br>
> To: Ravikanth.Samprathi@asu.edu
> Cc: ns-users@mash.cs.berkeley.edu, Arunabha Sen <arunabha.sen@asu.edu>
> Subject: Re: [ns] problem with colors
> 
> 
> > Hi ns-users,
> > I have implemented a set of algorithms using ns.  They generate a network with
> > a set of hosts, routers and destinations.  Packets are generated from nodes
> > and move to destinations through the routers.  In the tcl-script, i have
> > configured packets from different flows to have different colors.
> > My problem is the following.
> > When i say "nam out.nam" to execute the nam file, the different colors for
> > different packets do not show up.
> > Can any one help me regarding this? Why arent colors showing up?
> 
> Are you making the necessary settings, as presented in example 2 of Mark
> Greis tutorial ?
> Field color must be set (e.g., $ns color 1 Blue), for all colors.
> And agents must have field fid_ set (e.g. $udp0 set fid_ 1)
> 
> Carlos
> 
> 
> 
> > Thank you, regards, ravi
> > 
> > 
> 
> 
> 
>