netdev - Re: [PATCH v2 net-next 0/6] Allow bridge to function in non-promisc mode

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Message-ID: <20130502141626.17fc04a7@nehalam.linuxnetplumber.net>
Date:	Thu, 2 May 2013 14:16:26 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Vlad Yasevich <vyasevic@...hat.com>, netdev@...r.kernel.org,
	bridge@...ts.linux-foundation.org
Subject: Re: [PATCH v2 net-next 0/6] Allow bridge to function in non-promisc
 mode

On Thu, 2 May 2013 21:37:58 +0300
"Michael S. Tsirkin" <mst@...hat.com> wrote:

> On Thu, May 02, 2013 at 10:23:31AM -0700, Stephen Hemminger wrote:
> > Doing research on another problem, I noticed that this would
> > break user mode spanning tree (RSTP) code.
> > 
> > The daemon assumes that bridge is promicious mode and therefore
> > will receive all link-level multicast packets.
> 
> Since you have to play with the new learning/flooding
> options to get the non promisc behaviour,
> can't we just say "don't do it then"
> short term, and fix applcations long term?

It will work as long as non-promiscious mode turns on all-multicast
in driver.
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