From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752914AbbC2TeI (ORCPT ); Sun, 29 Mar 2015 15:34:08 -0400 Received: from shards.monkeyblade.net ([149.20.54.216]:59236 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752455AbbC2TeE (ORCPT ); Sun, 29 Mar 2015 15:34:04 -0400 Date: Sun, 29 Mar 2015 12:42:48 -0700 (PDT) Message-Id: <20150329.124248.1745435092252856808.davem@davemloft.net> To: klamm@yandex-team.ru Cc: netdev@vger.kernel.org, hannes@stressinduktion.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3] net: sysctl for RA default route MTU From: David Miller 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> X-Mailer: Mew version 6.4 on Emacs 23.4 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Sun, 29 Mar 2015 12:34:04 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Roman Gushchin Date: Thu, 26 Mar 2015 14:49:54 +0300 > 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 This does not apply cleanly to net-next, please respin.