netdev - RE: Does NetworkManager kill IPv6 connections?

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Message-ID: <063D6719AE5E284EB5DD2968C1650D6D1748838C@AcuExch.aculab.com>
Date:	Fri, 5 Sep 2014 14:18:04 +0000
From:	David Laight <David.Laight@...LAB.COM>
To:	'Dan Williams' <dcbw@...hat.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: Does NetworkManager kill IPv6 connections?

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]: <info> 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.

	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
> >
> >
> >
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> 

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