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Re: [PATCH net-next] bridge: multicast to unicast

From "M. Braun" <michael-dev@fami-braun.de>
Newsgroups linux.kernel
Subject Re: [PATCH net-next] bridge: multicast to unicast
Date 2017-01-07 11:50 +0100
Message-ID <sWWJr-7wv-7@gated-at.bofh.it> (permalink)
References <sVgMh-3mY-17@gated-at.bofh.it> <sWChH-24g-11@gated-at.bofh.it> <sWDdL-2Hu-5@gated-at.bofh.it> <sWDdL-2Hu-13@gated-at.bofh.it>
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Am 06.01.2017 um 14:54 schrieb Johannes Berg:
> 
>> The bridge layer can use IGMP snooping to ensure that the multicast
>> stream is only transmitted to clients that are actually a member of
>> the group. Can the mac80211 feature do the same?
> 
> No, it'll convert the packet for all clients that are behind that
> netdev. But that's an argument for dropping the mac80211 feature, which
> hasn't been merged upstream yet, no?

But there is multicast/broadcast traffic like e.g. ARP and some IP
multicast groups that are not covered by IGMP snooping. The mac80211
patch converts this to unicast as well, which the bridge cannot do.

That way, these features both complement and overlap each other.

Regards,
Michael

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Thread

Re: [PATCH net-next] bridge: multicast to unicast Johannes Berg <johannes@sipsolutions.net> - 2017-01-06 14:00 +0100
  Re: [PATCH net-next] bridge: multicast to unicast Felix Fietkau <nbd@nbd.name> - 2017-01-06 15:00 +0100
    Re: [PATCH net-next] bridge: multicast to unicast Johannes Berg <johannes@sipsolutions.net> - 2017-01-06 15:00 +0100
      Re: [PATCH net-next] bridge: multicast to unicast Felix Fietkau <nbd@nbd.name> - 2017-01-06 15:40 +0100
      Re: [PATCH net-next] bridge: multicast to unicast "M. Braun" <michael-dev@fami-braun.de> - 2017-01-07 11:50 +0100
        Re: [PATCH net-next] bridge: multicast to unicast Linus Lüssing <linus.luessing@c0d3.blue> - 2017-01-07 16:00 +0100
          Re: [PATCH net-next] bridge: multicast to unicast Johannes Berg <johannes@sipsolutions.net> - 2017-01-09 09:10 +0100
            Re: [PATCH net-next] bridge: multicast to unicast "M. Braun" <michael-dev@fami-braun.de> - 2017-01-09 13:00 +0100
              Re: [PATCH net-next] bridge: multicast to unicast Johannes Berg <johannes@sipsolutions.net> - 2017-01-09 13:20 +0100
                Re: [PATCH net-next] bridge: multicast to unicast michael-dev <michael-dev@fami-braun.de> - 2017-01-09 16:30 +0100
                Re: [PATCH net-next] bridge: multicast to unicast Johannes Berg <johannes@sipsolutions.net> - 2017-01-09 16:50 +0100
              Re: [PATCH net-next] bridge: multicast to unicast Linus Lüssing <linus.luessing@c0d3.blue> - 2017-01-09 22:30 +0100
                Re: [PATCH net-next] bridge: multicast to unicast Stephen Hemminger <stephen@networkplumber.org> - 2017-01-09 22:40 +0100
                Re: [PATCH net-next] bridge: multicast to unicast Linus Lüssing <linus.luessing@c0d3.blue> - 2017-01-10 05:20 +0100
                Re: [PATCH net-next] bridge: multicast to unicast Johannes Berg <johannes@sipsolutions.net> - 2017-01-10 12:00 +0100
                Re: [PATCH net-next] bridge: multicast to unicast Dave Taht <dave.taht@gmail.com> - 2017-01-10 18:20 +0100
                Re: [PATCH net-next] bridge: multicast to unicast Felix Fietkau <nbd@nbd.name> - 2017-01-10 18:30 +0100
                Re: [PATCH net-next] bridge: multicast to unicast Dave Taht <dave.taht@gmail.com> - 2017-01-10 19:30 +0100
                Re: [PATCH net-next] bridge: multicast to unicast Felix Fietkau <nbd@nbd.name> - 2017-01-10 22:30 +0100
                Re: [PATCH net-next] bridge: multicast to unicast Felix Fietkau <nbd@nbd.name> - 2017-01-11 12:40 +0100
                Re: [PATCH net-next] bridge: multicast to unicast Felix Fietkau <nbd@nbd.name> - 2017-01-11 13:30 +0100
  Re: [PATCH net-next] bridge: multicast to unicast Linus Lüssing <linus.luessing@c0d3.blue> - 2017-01-07 16:20 +0100
    Re: [PATCH net-next] bridge: multicast to unicast Johannes Berg <johannes@sipsolutions.net> - 2017-01-09 09:10 +0100
      Re: [PATCH net-next] bridge: multicast to unicast Linus Lüssing <linus.luessing@c0d3.blue> - 2017-01-09 13:50 +0100
        Re: [PATCH net-next] bridge: multicast to unicast Johannes Berg <johannes@sipsolutions.net> - 2017-01-09 13:50 +0100
          Re: [PATCH net-next] bridge: multicast to unicast Linus Lüssing <linus.luessing@c0d3.blue> - 2017-01-10 00:20 +0100
            Re: [PATCH net-next] bridge: multicast to unicast Johannes Berg <johannes@sipsolutions.net> - 2017-01-11 10:20 +0100

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