netdev - Re: Does NetworkManager kill IPv6 connections?

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Date:	Thu, 04 Sep 2014 19:43:45 +0200
From:	Daniel Borkmann <dborkman@...hat.com>
To:	David Laight <David.Laight@...LAB.COM>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>, dcbw@...hat.com
Subject: Re: Does NetworkManager kill IPv6 connections?

[ 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]: <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.
>
> 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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