Re: /proc/sys/net/ipv[46]/conf/ issue unsolved

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On Tue, 13 Feb 2007 15:29:04 +0200
Hasso Tepper <[email protected]> wrote:

> There is long standing issue in kernel which makes using /etc/sysctl.conf
> useless for boottime configuration of specific interface properties and
> breaks probably any software relying on unconditional existence of the
> conf trees like it was in previous kernels (I alone have written several
> pieces of such software). It's broken AFAIK from 2.6.15. There has been
> several notes about issue in the list, but issue haven't got any (at least
> efficient) attention from developers.
> 
> The current behaviour bites users in many ways and breaks several use cases.
> I asked several times in the past "what I should do now?" question, but
> got no clear answer.
> 
> References:
> http://marc.theaimsgroup.com/?l=linux-netdev&m=115685059625467&w=2
> http://marc.theaimsgroup.com/?l=linux-netdev&m=115690828822486&w=2
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169809
> 
> Is there any chance this will be fixed or at least clear position is
> taken by developers? Breaking userspace applications is declared nonono
> several times in the past ... I'm not even against breaking it if there
> is _very_ good reason to do it. Ok, but I want to know how userspace is
> meant to behave now. I can't continue using crappy workarounds.

As Herbert Xu said:

> You can disable it in /proc/sys/net/ipv6/conf/default/... and then
> reenable it on the interfaces that you actually want.

And Xen is broken because it tries to use the same bogus Mac
address on on all pseudo devices.


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