> > 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
