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Message-ID: <CAF1ivSZqjaWvj4JkkzM_PTBuqYSKDdkYXxijfRWdcWqaF_P4-g@mail.gmail.com> Date: Tue, 25 Sep 2012 23:12:00 +0800 From: Lin Ming <mlin@...pku.edu.cn> To: Felix Fietkau <nbd@...nwrt.org> Cc: netdev <netdev@...r.kernel.org>, Herbert Xu <herbert@...dor.apana.org.au> Subject: Re: bridge igmp snooping implementation On Tue, Sep 25, 2012 at 6:18 PM, Felix Fietkau <nbd@...nwrt.org> wrote: > Hi, > > I'v been looking at the bridge IGMP snooping code and I noticed that it > appears to not keep track of multicast group member IP addresses. Is > this intentional? > > It seems to me that this would lead to issues when multiple members of > the same multicast group are behind the same bridge port, and one of > them leaves. > > I'm currently looking into adding a feature that allows bridge ports to > be configured to selectively turn multicast traffic into unicast > traffic. For this I would need to change the code to keep track of > member IP and MAC addresses. Good idea. This can help to resolve my problem at: http://marc.info/?l=linux-netdev&m=134855468803809&w=2 Thanks. > > This helps a lot on 802.11, where unicast is often much cheaper than > multicast, even when sending out duplicate packets (higher data rates > and aggregation heavily reduce airtime utilization). > > - Felix -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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