Messages in this thread | | | Date | Sun, 16 Feb 2014 10:57:54 -0800 | From | Stephen Hemminger <> | Subject | Re: [RFC v2 1/4] bridge: enable interfaces to opt out from becoming the root bridge |
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On Fri, 14 Feb 2014 18:59:37 -0800 "Luis R. Rodriguez" <mcgrof@do-not-panic.com> wrote:
> From: "Luis R. Rodriguez" <mcgrof@suse.com> > > It doesn't make sense for some interfaces to become a root bridge > at any point in time. One example is virtual backend interfaces > which rely on other entities on the bridge for actual physical > connectivity. They only provide virtual access. > > Device drivers that know they should never become part of the > root bridge have been using a trick of setting their MAC address > to a high broadcast MAC address such as FE:FF:FF:FF:FF:FF. Instead > of using these hacks lets the interfaces annotate its intent and > generalizes a solution for multiple drivers, while letting the > drivers use a random MAC address or one prefixed with a proper OUI. > This sort of hack is used by both qemu and xen for their backend > interfaces. > > Cc: Stephen Hemminger <stephen@networkplumber.org> > Cc: bridge@lists.linux-foundation.org > Cc: netdev@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
This is already supported in a more standard way via the root block flag.
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