quoted

What i found is that the Marvell chips don't flood broadcast frames
between bridged ports. What appears to happen is there is a fdb miss,
so it gets forwarded to the CPU port for the host to deal with. The
software bridge when floods it out all ports of the bridge.

Do you have this issue on a single switch?

Yes. I have two boards with a single switch in my test setup. They
fail the broadcast tests in the same way as boards with multiple
switches.

It should be done at the DSA level. DSA core must be the single entry
point to handle all the switch logic, calling into (dumb) DSA drivers.
If it is buried into a specific driver, we'll likely lose track of the
problem and make it harder to maintain.

I think we need to wait and see what driver writers report their chips
are doing. If this is just a Marvell issue, we probably should fix it
in the Marvell driver only.

If i remember correctly, Woojung said he was seeing duplication of
broadcasts. So it could be the Microchip hardware is forwarding
broadcast in the hardware.

	  Andrew