From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: [PATCH] ppp: allow disabling multilink protocol ID compression Date: Tue, 21 Dec 2010 06:43:36 +0100 Message-ID: <1292910216.2627.156.camel@edumazet-laptop> References: <20101220195833.26786ec5@nehalam> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Paul Mackerras , linux-ppp@vger.kernel.org, netdev@vger.kernel.org To: Stephen Hemminger Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:33558 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751239Ab0LUFnm (ORCPT ); Tue, 21 Dec 2010 00:43:42 -0500 In-Reply-To: <20101220195833.26786ec5@nehalam> Sender: netdev-owner@vger.kernel.org List-ID: Le lundi 20 d=C3=A9cembre 2010 =C3=A0 19:58 -0800, Stephen Hemminger a = =C3=A9crit : > Linux would not connect to other router running old version Cisco IOS= (12.0). > This is most likely a bug in that version of IOS, since it is fixed > in later versions. As a workaround this patch allows a module paramet= er > to be set to disable compressing the protocol ID. >=20 > See: https://bugzilla.vyatta.com/show_bug.cgi?id=3D3979 >=20 > RFC 1990 allows an implementation to formulate MP fragments as if pro= tocol > compression had been negotiated. This allows us to always send compr= essed > protocol IDs. But some implementations don't accept MP fragments wit= h > compressed protocol IDs. This parameter allows us to interoperate wi= th > them. The default value of the configurable parameter is the same as= the > current behavior: protocol compression is enabled. If protocol comp= ression > is disabled we will not send compressed protocol IDs. >=20 > This is based on an earlier patch by Bob Gilligan (using a sysctl). > Module parameter is writable to allow for enabling even if ppp > is already loaded for other uses. >=20 > Signed-off-by: Stephen Hemminger Acked-by: Eric Dumazet