From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Hartmann Subject: Re: [Patch] fix packet loss and massive ping spikes with PPP multi-link Date: Fri, 26 Mar 2010 17:39:27 +0100 Message-ID: References: <2d460de71003260850x7f90d04cy79ac853464108182@mail.gmail.com> <20100326160226.0159ac3b@lxorguk.ukuu.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-ppp@vger.kernel.org To: Alan Cox Return-path: Received: from mail-ew0-f221.google.com ([209.85.219.221]:43475 "EHLO mail-ew0-f221.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751217Ab0CZQj3 convert rfc822-to-8bit (ORCPT ); Fri, 26 Mar 2010 12:39:29 -0400 In-Reply-To: <20100326160226.0159ac3b@lxorguk.ukuu.org.uk> Sender: netdev-owner@vger.kernel.org List-ID: On Fri, Mar 26, 2010 at 17:02, Alan Cox wrot= e: > You should be able to manage that I'm sure: Hopefully. We will see :) > MODULE_PARM_DESC(ml_expode, "Set this to zero to disabling multilink = \ > =C2=A0 =C2=A0 =C2=A0 =C2=A0fragmentation when talking to cisco device= s"); To be exact, this is not a Linux vs. Cisco issue, but a Linux vs. world issue. At least the last-level support of Telefonica and QSC was definite and adamant about not enabling fragmentation on _any_ PPP multi-link, ever. Also, I am not sure if it would not be better to default to no fragmentation and enable it optionally. I am aware that changing defaul= t behaviour is always a bit of a problem but to the best of my knowledge enabling fragmentation is a bug in any and all real-world applications. Richard