From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: David Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Subject: Re: sysctls below net.ipv[46].conf.all not working as expected
Date: Thu, 30 Dec 2010 21:43:19 +0100 [thread overview]
Message-ID: <20101230204319.GE14221@pengutronix.de> (raw)
In-Reply-To: <20101230.123023.226775556.davem@davemloft.net>
Hello David,
On Thu, Dec 30, 2010 at 12:30:23PM -0800, David Miller wrote:
> From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> Date: Wed, 29 Dec 2010 17:06:07 +0100
>
> > I did the following:
> >
> > cassiopeia:~# sysctl net.ipv6.conf.all.use_tempaddr
> > net.ipv6.conf.all.use_tempaddr = 0
> >
> > cassiopeia:~# sysctl net.ipv6.conf.eth0.use_tempaddr
> > net.ipv6.conf.eth0.use_tempaddr = 0
> >
> > cassiopeia:~# sysctl -w net.ipv6.conf.all.use_tempaddr=1
> > net.ipv6.conf.all.use_tempaddr = 1
> >
> > cassiopeia:~# sysctl net.ipv6.conf.all.use_tempaddr
> > net.ipv6.conf.all.use_tempaddr = 1
> >
> > cassiopeia:~# sysctl net.ipv6.conf.eth0.use_tempaddr
> > net.ipv6.conf.eth0.use_tempaddr = 0
> >
> > Here I would have expected that eth0's use_tempaddr is 1, too. The
> > problem is not that this entry isn't writeable:
>
> The "all" value is propagated at the first moment that the ipv6 device
> private is created, usually that is when the device is first brought up
> which means it can happen as early as the exact moment the device is
> registered.
>
> Therefore, if you want "all" to apply to "eth0", you must make sure
> the sysctl is set properly before the device is registered.
I thought this is what "default" was used for?!
If you are really right, the documentation is (IMHO) misleading. e.g.
Documentation/networking/ip-sysctl.txt tells:
conf/default/*:
Change the interface-specific default settings.
conf/all/*:
Change all the interface-specific settings.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
next prev parent reply other threads:[~2010-12-30 20:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-29 16:06 sysctls below net.ipv[46].conf.all not working as expected Uwe Kleine-König
2010-12-30 20:20 ` Uwe Kleine-König
2010-12-30 20:30 ` David Miller
2010-12-30 20:43 ` Uwe Kleine-König [this message]
2011-02-22 9:34 ` Uwe Kleine-König
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