From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Frederic Sowa Subject: Re: [PATCH net-next] net: ipv6: Add sysctl entry to disable MTU updates from RA Date: Mon, 19 Jan 2015 20:07:20 +0100 Message-ID: <1421694440.13047.1.camel@stressinduktion.org> References: <1421456558-27144-1-git-send-email-harouth@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Harout Hedeshian Return-path: Received: from out3-smtp.messagingengine.com ([66.111.4.27]:56736 "EHLO out3-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751396AbbASTHX (ORCPT ); Mon, 19 Jan 2015 14:07:23 -0500 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailout.nyi.internal (Postfix) with ESMTP id 42084206FF for ; Mon, 19 Jan 2015 14:07:22 -0500 (EST) In-Reply-To: <1421456558-27144-1-git-send-email-harouth@codeaurora.org> Sender: netdev-owner@vger.kernel.org List-ID: On Fr, 2015-01-16 at 18:02 -0700, Harout Hedeshian wrote: > The kernel forcefully applies MTU values received in router > advertisements provided the new MTU is less than the current. This > behavior is undesirable when the user space is managing the MTU. Instead > a sysctl flag 'accept_ra_mtu' is introduced such that the user space > can control whether or not RA provided MTU updates should be applied. The > default behavior is unchanged; user space must explicitly set this flag > to 0 for RA MTUs to be ignored. > > Signed-off-by: Harout Hedeshian Makes sense! Acked-by: Hannes Frederic Sowa Thanks, Hannes