netdev - Re: [PATCH v2 rfc 0/8] IGMP snooping for local traffic

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Date:   Wed, 6 Sep 2017 17:16:40 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Matthias May <matthias.may@...atec.com>
Cc:     netdev <netdev@...r.kernel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Woojung.Huh@...rochip.com, jbe@...gutronix.de,
        sean.wang@...iatek.com, john@...ozen.org
Subject: Re: [PATCH v2 rfc 0/8] IGMP snooping for local traffic

On Wed, Sep 06, 2017 at 04:46:51PM +0200, Matthias May wrote:
> 
> Hi Andrew
> We are using the 88E6321.
> In our setup we are using openvswitch and not a bridge, however the problem you describe seems to be the same.
> 
> We had to configure the switch to flood unknown multicast (Egress Floods = 0x3, bits 3:2, offset 0x4 in port control)
> and
> unset FloodBC (FloodBC = 0x0, bit 12, offset 0x5 in global 2) which defines if a broadcast should be considered as
> multicast for the above config.

Hi Matthias

I might look at this.

But architecturally it seems better to add an mdb entry for the
broadcast address. I hope that work across all switches, where as what
you suggests only works for Marvell devices.

    Andrew