[tg] Regarding the many to one traffic flow

sachin sachinls@netsys.kaist.ac.kr
Thu, 9 Jan 2003 11:06:48 +0900


Can you please give the packet format (header) for both UDP and TCP?
----- Original Message -----
From: "Barbara Denny" <b_a_denny@yahoo.com>
To: "sachin" <sachinls@netsys.kaist.ac.kr>; "Venkata Pingali"
<pingali@ISI.EDU>
Cc: "Barbara Denny" <b_a_denny@yahoo.com>; <tg@postel.org>
Sent: Thursday, January 09, 2003 1:15 AM
Subject: Re: [tg] Regarding the many to one traffic flow


> Hi,
>
> The TCP/UDP you get is dependent on what the operating
> system supplies.  TG does not do anything special
> regarding transport protocols unless you have added
> one of your own to TG. It makes socket calls to the
> kernel to get whatever support it needs for these
> protocols.
>
> barbara
> --- sachin <sachinls@netsys.kaist.ac.kr> wrote:
> > Hi,
> >
> > I have two more questions regarding TG.
> >
> > 1. To what degree TG can immulate TCP protocol. Will
> > the traffic be
> > dependent on congestion of the network for TCP and
> > will the sndwin be
> > changed based on the congestion. Is it a closed loop
> > system that has been
> > implimented in TG or is it the open loop system
> > unlike actual TCP?
> >
> > 2. Another thing is what is the packet format for
> > UDP and TCP generated by
> > TG?
> >
> > Sachin
> >
> > ----- Original Message -----
> > From: "Venkata Pingali" <pingali@ISI.EDU>
> > To: "sachin" <sachinls@netsys.kaist.ac.kr>
> > Cc: "Barbara Denny" <b_a_denny@yahoo.com>;
> > <tg@postel.org>
> > Sent: Wednesday, January 08, 2003 9:45 AM
> > Subject: Re: [tg] Regarding the many to one traffic
> > flow
> >
> >
> > > Hi,
> > >
> > > I looked at the script, and  looks like the script
> > will be have to be
> > > extended to support multiple sources explicitly.
> > >
> > > One way to get around the limitation is to use
> > multiple sinks (i.e., have
> > > multiple 1-1 connections).
> > >
> > > Venkata
> > >
> > > On Tue, 7 Jan 2003, sachin wrote:
> > > > Well, Thank you guys for helping out. Well I
> > have simulated many to one
> > > > traffic scenario. Its works as expected and the
> > log file in sink machine
> > > > also supports the fact.
> > > >
> > > > Now the problem is how can I generate files from
> > gengraph.pl with many
> > > > client files and only one source file. If I try
> > to cross each client
> > file
> > > > with the source file then it works with an
> > warning and i have ill
> > feeling
> > > > the file so generated is never a valid one. So
> > please help me out in
> > this.
> > > >
> > > > Sachin
> > > > ----- Original Message -----
> > > > From: "sachin" <sachinls@netsys.kaist.ac.kr>
> > > > To: "Venkata Pingali" <pingali@ISI.EDU>
> > > > Cc: "Barbara Denny" <b_a_denny@yahoo.com>;
> > <tg@postel.org>
> > > > Sent: Tuesday, January 07, 2003 4:57 PM
> > > > Subject: Re: [tg] data rate
> > > >
> > > >
> > > > > Thank you,
> > > > >
> > > > > I have attached the files. The attachment
> > contains log and well as
> > dcat'd
> > > > > files. I have send log files to get further
> > information regarding the
> > use
> > > > of
> > > > > gengraph.pl
> > > > >
> > > > > I have used one of the source files to get a
> > stats.xpl (default name).
> > I
> > > > > wanted to view this file with the help of
> > gnuplot and xplot. Well
> > these
> > > > > tools are installed in my windows machine. But
> > non of these can read
> > the
> > > > > file format. Can you please tell me where I
> > went wrong.
> > > > >
> > > > > Sachin
> > > > > ----- Original Message -----
> > > > > From: "Venkata Pingali" <pingali@ISI.EDU>
> > > > > To: "sachin" <sachinls@netsys.kaist.ac.kr>
> > > > > Cc: "Barbara Denny" <b_a_denny@yahoo.com>;
> > <tg@postel.org>
> > > > > Sent: Tuesday, January 07, 2003 4:08 PM
> > > > > Subject: Re: [tg] data rate
> > > > >
> > > > >
> > > > > >
> > > > > > There is nothing fundamentally stopping one
> > from running multiple
> > > > sources
> > > > > > provided it is within resource limits of the
> > host. TG can accept
> > > > multiple
> > > > > > connections simultaneously. can you please
> > send me the input tg
> > files
> > > > and
> > > > > > the log file (or its dcat'd output) to my
> > private email address?  I
> > will
> > > > > > see if those files give me a hint.
> > > > > >
> > > > > > thanks.
> > > > > > Venkata
> > > > > >
> > > > > > On Tue, 7 Jan 2003, sachin wrote:
> > > > > > > Thank you.
> > > > > > >
> > > > > > > Is it possible to run more than 1 TG
> > source in a single machine.
> > Well
> > > > I
> > > > > have
> > > > > > > tried it here. But the sink seems to
> > accept packets from one
> > source
> > > > and
> > > > > then
> > > > > > > as this source stops transmitting it goes
> > for another source. I
> > have
> > > > > > > realized this from the log file of the
> > sink.
> > > > > > >
> > > > > > > Well my intention is to generate four
> > concurrent traffic streams
> > and
> > > > > feed
> > > > > > > them into IXP machine (which will be
> > working as router) and will
> > be
> > > > > using
> > > > > > > single sink.
> > > > > > >
> > > > > > > sachin
> > > > > > >
> > > > > > > ----- Original Message -----
> > > > > > > From: "Barbara Denny"
> > <b_a_denny@yahoo.com>
> > > > > > > To: "sachin"
> > <sachinls@netsys.kaist.ac.kr>; <tg@postel.org>
> > > > > > > Sent: Tuesday, January 07, 2003 2:47 PM
> > > > > > > Subject: Re: [tg] data rate
> > > > > > >
> > > > > > >
> > > > > > > > The specification of the interarrival
> > rate plus
> > > > > > > > the packet size gives you the data rate.
> > > > > > > >
> > > > > > > > barbara
> > > > > > > >
> > > > > > > > --- sachin <sachinls@netsys.kaist.ac.kr>
> > wrote:
> > > > > > > > > Hi,
> > > > > > > > >
> > > > > > > > > I forgot to add one more query in the
> > last email.
> > > > > > > > > How can we explicitly give the data
> > rate for
> > > > > > > > > transmission. Well if there is no such
> > provision how
> > > > > > > > > are we suppose to provide data rate.
> > > > > > > > >
> > > > > > > > > Sachin
> > > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > __________________________________________________
> > > > > > > > Do you Yahoo!?
> > > > > > > > Yahoo! Mail Plus - Powerful. Affordable.
> > Sign up now.
> > > > > > > > http://mailplus.yahoo.com
> > > > > > >
> > > > > > >
> > > > > > >
> > _______________________________________________
> > > > > > > tg mailing list
> > > > > > > tg@postel.org
> > > > > > > http://www.postel.org/mailman/listinfo/tg
> > > > > > >
> > > > > >
> > > > >
> > > >
> >
> === message truncated ===
>
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
> http://mailplus.yahoo.com