netdev - Re: [BUG] bd4265fe36 bridge: Only flood unreg groups... breaks DHCP setup

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Message-ID: <20110706054504.GA7786@gondor.apana.org.au>
Date:	Wed, 6 Jul 2011 13:45:05 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	David Miller <davem@...emloft.net>, mike@...loops.com,
	netdev@...r.kernel.org
Subject: Re: [BUG] bd4265fe36 bridge: Only flood unreg groups... breaks
	DHCP setup

On Tue, Jul 05, 2011 at 10:35:51PM -0700, Stephen Hemminger wrote:
>
> The bisected commit bd4265fe36 is in 3.0-rc4 but the input code
> path still treats multicast and broadcast the same which means
> there are some other possible cases where broadcast doesn't get
> forwarded.

AFAIK it worked properly prior to bd4265fe36 because broadcast
addresses simply get treated as an unregistered multicast group
and ends up being flooded.

So while yes we do do an extra mdb lookup I don't think there is
any visible problem in stable.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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