[tg] Do I need two computers?

[Fernando Lemos (QRA)]

Hello again!
I want to install TG and see how it works. First doubt I have is if I can install it only in one computer with to Network Interfaces (one for the generator and one for the sink). If I do that, does the packets go through the network?
Should I install the TG in two computers then? How are the clocks going to be synchronized?

If you have answers for this questions, I would appreciate it a lot!
Thanks,
Fernando.

-----Original Message-----
From: Venkata Pingali [mailto:pingali@ISI.EDU]
Sent: den 14 februari 2002 10:37
To: Fernando.Lemos@era.ericsson.se
Cc: tg@postel.org
Subject: Re: [tg] Doubt about TG TCP generation


TG uses the host OS's TCP implementation as presented through the standard
socket API. TG can only control when packets are scheduled (the timing), their
sizes etc. but cannot control what the TCP implementation does (eg. retries, 
merging packets etc.). 

The assumption is that over an extended period of time, when TCP finds its
approximate steady state, data will be delivered at (roughly) the user
specified rates (If the rate is not high enough to stress the system call 
interface and the rest of the network traffic does not interfere with this
test traffic).

Venkata

> Ok, doubt is:
> when you start a TCP connection, TCP has it's own mechanisms to control flow. It may slow down or speed up the transmission depending on Network congestion, right?
> so, when TG generates TCP traffic, how do I have control of the flow I want to generate, since if it is a TCP flow, it will depend much on the load of the network.
> Does TG implements full TCP protocol, including flow control mechanism?
> 
> 
> I don't know if I explain it well and if you can help me to clarify it!
> I appreciate your attention.
> Fernando.
> 
> -----Original Message-----
> From: Barbara Denny [mailto:denny@isi.edu]
> Sent: den 13 februari 2002 19:56
> To: Fernando Lemos (QRA)
> Cc: 'tg@postel.org'
> Subject: Re: [tg] Doubt about TG TCP generation
> 
> 
> the documentation is "the code."  i don't have as much experience with
> the TCP part of the code. but what are your doubts about the TCP generation.
> 
> barbara
> 
> "Fernando Lemos (QRA)" wrote:
> 
> > I would like to know where can I find information about how TCP generation works in this tool (TG).
> > Any help is appreciated.
> > Thanks,
> > Fernando.
> > _______________________________________________
> > tg mailing list
> > tg@postel.org
> > http://www.postel.org/mailman/listinfo/tg
>