From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753158AbbCZOtG (ORCPT ); Thu, 26 Mar 2015 10:49:06 -0400 Received: from out2-smtp.messagingengine.com ([66.111.4.26]:57589 "EHLO out2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753115AbbCZOtD (ORCPT ); Thu, 26 Mar 2015 10:49:03 -0400 Message-Id: <1427381341.2801675.245582457.5499DAED@webmail.messagingengine.com> X-Sasl-Enc: pOI/5KyV7OXGu3WURexj9teELa0PgtWrGUaPyBoK1B4J 1427381341 From: Hannes Frederic Sowa To: Roman Gushchin , netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, "David S. Miller" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain X-Mailer: MessagingEngine.com Webmail Interface - ajax-f437beda In-Reply-To: <1427370594-18807-1-git-send-email-klamm@yandex-team.ru> References: <1427307255.3555533.245187845.14A187CD@webmail.messagingengine.com> <1427370594-18807-1-git-send-email-klamm@yandex-team.ru> Subject: Re: [PATCH v3] net: sysctl for RA default route MTU Date: Thu, 26 Mar 2015 15:49:01 +0100 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 26, 2015, at 12:49, Roman Gushchin wrote: > This patch introduces new ipv6 sysctl: ra_default_route_mtu. > If it's set (> 0), it defines per-route MTU for any new default route > received by RA. > > This sysctl will help in the following configuration: we want to use > jumbo-frames for internal networks and default ethernet frames for > default route. Per-route MTU can only lower per-link MTU, so link MTU > should be set to ~9000 (statically or via RA). > > Due to dynamic nature of RA, setting MTU for default route will require > userspace agent, that will monitor changes of default route > and (re)configure it. Not simple. The suggested sysctl solves this > problem. > > Signed-off-by: Roman Gushchin Acked-by: Hannes Frederic Sowa Thanks!