From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Borkmann Subject: Re: Does NetworkManager kill IPv6 connections? Date: Thu, 04 Sep 2014 19:43:45 +0200 Message-ID: <5408A4D1.9050606@redhat.com> References: <063D6719AE5E284EB5DD2968C1650D6D174876CB@AcuExch.aculab.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "netdev@vger.kernel.org" , dcbw@redhat.com To: David Laight Return-path: Received: from mx1.redhat.com ([209.132.183.28]:42548 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751449AbaIDRnv (ORCPT ); Thu, 4 Sep 2014 13:43:51 -0400 In-Reply-To: <063D6719AE5E284EB5DD2968C1650D6D174876CB@AcuExch.aculab.com> Sender: netdev-owner@vger.kernel.org List-ID: [ Cc'ing Dan ] On 09/04/2014 04:47 PM, David Laight wrote: > I was running a overnight test that failed because an (almost idle) IPv6 connection > unexpectedly disconnected. > 30 seconds before the disconnect syslog contains (retyped): > NetworkManager[pid]: policy set 'Wired connection 2' (eth0) as default for IPv6 routing and DNS. > The same message appeared exactly 70 minutes earlier - with no ill effect. > A second connection between the same pair if addresses (carrying a lot of traffic) > was unaffected. > > Any idea what/why NetworkManager is doing? > (Yes I know it is userspace, but it seems to be breaking the kernel....) > > The system is an ubuntu 13.04 desktop (3.8.0-19 kernel), that recent, but > newer than the ones a lot of our customers use. > > I can rerun the test, but don't know what to look for. > 'eth0' is the only ethernet interface in the system that is actually > connected to a network. > > Some indications of where to look would be appreciated. > > David