Hello! This patch:
commit c5c23260594c5701af66ef754916775ba6a46bbc Author: Herbert Xu <[email protected]> Date: Fri Apr 13 02:37:42 2012 +0000 bridge: Add multicast_querier toggle and disable queries by default Sending general queries was implemented as an optimisation to speed up convergence on start-up. In order to prevent interference with multicast routers a zero source address has to be used. Unfortunately these packets appear to cause some multicast-aware switches to misbehave, e.g., by disrupting multicast packets to us. Since the multicast snooping feature still functions without sending our own queries, this patch will change the default to not send queries. For those that need queries in order to speed up convergence on start-up, a toggle is provided to restore the previous behaviour. Signed-off-by: Herbert Xu <[email protected]> Signed-off-by: David S. Miller <[email protected]> incompatibly broke ootb multicast in Linux until 3.12 or even higher (didn't test) for this use case: http://thread.gmane.org/gmane.linux.kernel/1622550 It is necessary to manually add this switch echo "1" > /sys/devices/virtual/net/br0/bridge/multicast_querier to get multicast working again. Would be nice to get the old behaviour (= working multicast ootb) back again. This would have saved a lot of time, probably not only in my case here (e.g. see https://bugzilla.redhat.com/show_bug.cgi?id=880035). Regards, Andreas -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
