From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Williams Subject: Re: Does NetworkManager kill IPv6 connections? Date: Fri, 05 Sep 2014 13:42:25 -0500 Message-ID: <1409942545.15943.10.camel@dcbw.local> References: <063D6719AE5E284EB5DD2968C1650D6D174876CB@AcuExch.aculab.com> <1409854625.23720.7.camel@dcbw.local> <063D6719AE5E284EB5DD2968C1650D6D1748838C@AcuExch.aculab.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: "netdev@vger.kernel.org" To: David Laight Return-path: Received: from mx1.redhat.com ([209.132.183.28]:62943 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751481AbaIESm3 (ORCPT ); Fri, 5 Sep 2014 14:42:29 -0400 In-Reply-To: <063D6719AE5E284EB5DD2968C1650D6D1748838C@AcuExch.aculab.com> Sender: netdev-owner@vger.kernel.org List-ID: On Fri, 2014-09-05 at 14:18 +0000, David Laight wrote: > From: Dan Williams > > On Thu, 2014-09-04 at 14:47 +0000, 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. > > > > Is the version of the Ubuntu "network-manager" package on your systems > > 0.9.8.0-0ubuntu6.1? > > It is actually the slightly older 0.9.8.0-0ubuntu6.0 > > > If so, I know we've fixed a ton of issues with IPv6 since 0.9.8.0 (which > > was released about 18 months ago), and the ones that may be affecting > > you are related to router advertisement timing and expiry. The latest > > stable NM version upstream is 0.9.10 and should contain all of those > > fixes. > > I've flagged it with our management, they'll decide what to say > about IPv6 support in various Linux distros. Ok, keep me (and the NM upstream) in the loop depending on what gets decided. Like I said, subsequent stable versions of NetworkManager in recent distros have much improved IPv6 support, and if you have a chance to try it out and let me know how it goes, that would be awesome. Dan > David > > > Since I'm pretty sure this isn't a kernel problem, would you mind > > discussing this over on the NM lists here: > > > > https://mail.gnome.org/mailman/listinfo/networkmanager-list > > > > If you don't want to subscribe that's fine, I'll moderate your message > > through and we can just use "reply all". > > > > Thanks, > > Dan > > > > > 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 > > > > > > > > > > > > -- > > > To unsubscribe from this list: send the line "unsubscribe netdev" in > > > the body of a message to majordomo@vger.kernel.org > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > >