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