From mboxrd@z Thu Jan 1 00:00:00 1970 From: Markus Schulz Date: Thu, 02 Mar 2006 13:37:58 +0000 Subject: Re: [LARTC] Patch to allow for the ATM "cell tax" Message-Id: <200603021437.58824.msc@antzsystem.de> List-Id: References: <1141284603.10264.168.camel@ras.pc.brisbane.lube> In-Reply-To: <1141284603.10264.168.camel@ras.pc.brisbane.lube> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: lartc@vger.kernel.org Am Donnerstag, 2. M=C3=A4rz 2006 08:30 schrieb Russell Stuart: > I have been trying to optimise my ADSL connections for VOIP. > Funny things were happening - for example increasing the ping > packet size by 50% had no effect, but then adding one byte > had a major effect. It took me a while to figure out that I > was seeing the effects of the fixed ATM cell size. [ ADSL - ATM/AAL5/LLC Overhead description ] this stuff is well documented in Jesper Dangaard Brouer master thesis=20 found at: http://www.adsl-optimizer.dk/thesis/ There exists also patches which do static overhead rate table=20 calculation (incl. ATM Cell alignment) or per packet overhead=20 calculation for htb or other qdiscs. Why you don't use the existing overhead parameter? It's useless to have=20 two parameters which do the exact same thing (existing overhead and=20 your atm). Only ATM Cell alignment must be added to rate table calculation. --=20 Markus Schulz _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc