[H-GEN] network traffic shaping

[Russell Stuart]

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On Mon, 2003-08-04 at 15:38, Peter Arnold wrote:
> Either Solaris X86 (prefered as it is more intergal to our network) but I
> can run with RH9 if required.

Can't help with Solaris.  :(

> >
> > The linux command used to configure the traffic control engine is "tc".
> > There is no manual, but there is a "Linux Advanced Routing HOWTO".
> 
> Hmmm yeah I found that... I wan't real inspired when there was no man page
> and the howto looked a bit daunting but if that's a recommendation then
> I'll give it a shot.

Its even worse than you might think.  An unbelievable amount of
complexity is hidden under that one command.  It was developed under the
banner "anything Cisco can do we can do better", we being Linux.  If
they (well he really - Allexy) didn't achieve it he must of come close.

> >
> > If you can tell me exactly what you want to to I may be able to help
> > further.
> 
> I'd like to simulate different bandwidth/latency connections between a
> client and a server using an inhouse application. Currently we have
> several offices connected via Telstra FR with various levels of bandwidth
> (in particular 128 CIR, 256k Burst) where in some instances client
> connections to a server over the WAN really suck.
> 
> What I'd like to simulate is a 128K connection with ping times around
> 200ms as an ideal, then maybe a 64K connection with ping times of 800ms as
> a comparison of same link under load.
> 
> Said application has a (cough!) mssql backend which I believe does not
> play well with latency.

It looks like I answered a question you did not ask.  Netiquette 101 -
read the question before answering.  I will now attempt remove foot from
mouth and give some decent advice.  Look here:
  http://is2.antd.nist.gov/itg/nistnet/

A tutorial is here:
  http://linux.oreillynet.com/pub/a/linux/2000/06/22/LinuxAdmin.html

FreeBSD's DummyNet sounds very similar, but i know nothing of FreeBSD.

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