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From: Herbert Xu <herbert@gondor.apana.org.au>
To: "David S. Miller" <davem@davemloft.net>, netdev@vger.kernel.org
Subject: [0/3] bridge: Do not send multicast queries by default
Date: Fri, 13 Apr 2012 20:36:41 +0800	[thread overview]
Message-ID: <20120413123641.GA758@gondor.apana.org.au> (raw)

Hi:

This series of patches is aimed to change the default multicast
snooping behaviour to one that is safer to deploy in the wild.

There have been numerous reports of switches misbehaving with
our current behaviour of sending general queries, presumably
because we're using a zero source IP address which is unavoidable
as using anything else would interfere with multicast querier
elections (incidentally, I noticed that our IPv6 code has been
"fixed" to not use zero source addresses, which is wrong as we
may end up being THE MLD querier in a network).

Since our queries aren't actually required for multicast snooping
to function, but is merely an optimisation mostly for faster
start-up convergence, I think we should disable this by default.

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

             reply	other threads:[~2012-04-13 12:36 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-13 12:36 Herbert Xu [this message]
2012-04-13 12:37 ` [PATCH 1/3] bridge: Add br_multicast_start_querier Herbert Xu
2012-04-13 12:37 ` [PATCH 3/3] bridge: Add multicast_querier toggle and disable queries by default Herbert Xu
2012-04-13 12:37 ` [PATCH 2/3] bridge: Restart queries when last querier expires Herbert Xu
2012-04-13 14:53 ` [0/3] bridge: Do not send multicast queries by default David Miller
2012-04-15 11:13   ` Herbert Xu
2012-04-15 16:50     ` David Miller
2013-04-03 15:28     ` Linus Lüssing
2012-04-15 16:52 ` David Miller

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