[3370] in linux-net channel archive
Re: Traffic shaper
daemon@ATHENA.MIT.EDU (Jon Lewis)
Thu Jun 20 19:25:08 1996
Date: Thu, 20 Jun 1996 13:50:30 -0400 (EDT)
From: Jon Lewis <jlewis@inorganic5.fdt.net>
To: Mike Kilburn <mike@lserv.conexio.co.za>
cc: Alan Cox <alan@cymru.net>, linux-net@vger.rutgers.edu
In-Reply-To: <96Jun20.052211edt.106196-7187+6418@vger.rutgers.edu>
On Thu, 20 Jun 1996, Mike Kilburn wrote:
> I see. Well I would not drop any frames so I guess what I am talking about
> is not a traffic shaper but a "slow link simulator". The amount of buffer
> space required to hold the receive data could get quite large if you were
> trying to take a T1 down to a 14400kbs but it is quantifiable. The data
> source will slow down in time after it "figures out" there is a slow link
> in the path.
I'm pretty sure you will have to drop some frames...or die trying not
to. We had this problem a few months back where Iphone or CuSeeMe
users sessions would kill the terminal server because the other end of
their link was spitting out UDP packets much faster than the modem could
accept them, and eventually the system ran out of memory and crashed.
Alan fixed this for us by putting a limit on the number of UDP packets the
system would buffer.
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