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From: "Luis R. Rodriguez" <mcgrof@do-not-panic.com>
Date: Wed, 12 Feb 2014 11:52:00 -0800
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Subject: Re: [RFC 2/2] xen-netback: disable multicast and use a random hw MAC address
To: Bill Fink <billfink@mindspring.com>
Cc: Ian Campbell <Ian.Campbell@citrix.com>,
        "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
        xen-devel@lists.xenproject.org, Paul Durrant <Paul.Durrant@citrix.com>,
        Wei Liu <wei.liu2@citrix.com>, kvm@vger.kernel.org,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
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On Wed, Feb 12, 2014 at 9:17 AM, Bill Fink <billfink@mindspring.com> wrote:
> On Wed, 12 Feb 2014, Ian Campbell wrote:
>> IOW -- enabling/disabling multicast seems to me to be an odd proxy for
>> disabling SLAAC or DAD and AIUI your patch fixes the opposite case,
>> which is to avoid SLAAC and DAD on interfaces which don't do multicast
>> (which makes sense since those protocols involve multicast).
>
> Forgive me if this doesn't make sense in this context since
> I'm not a kernel developer, but I was just wondering if any of
> the sysctls:
>
>         /proc/sys/net/ipv6/conf/<ifc>/disable_ipv6
>         /proc/sys/net/ipv6/conf/<ifc>/accept_dad
>         /proc/sys/net/ipv6/conf/<ifc>/accept_ra
>         /proc/sys/net/ipv6/conf/<ifc>/autoconf
>
> would be apropos for the requirement being discussed.

These are run time configuration options, post initialization. What
we're considering is internal net_device capability fields, to even
avoid creating these in the first place.

  Luis
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