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RE: [ns] How to model aggregate traffic
Hi,
I recently had a similar problem and decided I'd have to
stick with a 100 node transit-stub domain instead of "the
simulated Internet" :(
But if there really MUST be so many nodes - you're using
Pareto anyway so you're not expecting the traffic to adapt -
why don't you collect the aggregate traffic from 100 Pareto
sources and put it in a trace file which you later use for
your trace file driven traffic generator node?
There must be a more subtle way, though ... with some cool
mathematics involved :)
Cheers,
Michael
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of
> Andrea Josi
> Sent: Tuesday, August 21, 2001 11:25 AM
> To: vanitcha; kunchanl
> Cc: [email protected]
> Subject: Re: [ns] How to model aggregate traffic
>
>
> Hi all,
> thanks for replying !
> Anyway, let me explain my problem.
> The point is: how many nodes should a topology be of,
> for being a realistic model of an internetwork of
> several AS?
> I believe that the order of magntiude is about 1000
> and 10000; assuming 1000 as a reasonable number, and
> assuming that NS can handle simulations with such a
> number of nodes, the problem is that i don`t have much
> time + disk memory (working under AFS...) to run such
> simulations: this is the reason why i would like to
> use no more than 100 nodes !
> Moreover, using multiple traffic sources on the same
> node would bring the same problems.
> Any hints ?
>
> Thanks a lot
>
> P.S. running a simulation with 100 nodes and
> multiplying the results for 10 or 100 could be a
> solution ? eh eh ....
>
> --- vanitcha <[email protected]> ha scritto: > Another
> suggestion is that you have 100
> > Transport-layer (TCP or UDP)
> > objects on a single source node. Each TCP object
> > generates Pareto traffic.
> >
> > Noparut
> >
> > On Mon, 20 Aug 2001, kunchanl wrote:
> >
> > >won't it be easier you have one node for each
> > pareto source
> > >and then have them all merge to the same link?
> > >you might want to take a look at
> > ~ns/tcl/ex/web-traffic.tcl
> > >as an example.
> > >
> > >
> > >Kun-chan Lan
> > >
> > >On Mon, 20 Aug 2001, [iso-8859-1] Andrea Josi
> > wrote:
> > >
> > >> Hi,
> > >>
> > >> i need an advice on how to model a set of
> > sources, for
> > >> example, 100 Pareto traffic sources: i would like
> > to
> > >> use a single NS node and a single traffic source,
> > but
> > >> in this case, how should i model the traffic
> > resulting
> > >> from the overlapping of my sources ?
> > >> is it correct to use a single Pareto source ?
> > what
> > >> value should i set for its parameters ?
> > >>
> > >> Thanks in advance.
> > >>
> > >>
> >
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>
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