On 12/19/18 6:59 PM, tristram...@microchip.com wrote:
> From: Tristram Ha <tristram...@microchip.com>
>
> Port partitioning is done by enabling UNICAST_VLAN_BOUNDARY and changing
> the default port membership of 0x7f to other values such that there is
> no communication between ports. In KSZ9477 the member for port 1 is
> 0x41; port 2, 0x42; port 3, 0x44; port 4, 0x48; port 5, 0x50; and port 7,
> 0x60. Port 6 is the host port.
>
> Setting a zero value can be used to stop port from receiving.
>
> However, when UNICAST_VLAN_BOUNDARY is disabled and the unicast addresses
> are already learned in the dynamic MAC table, setting zero still allows
> devices connected to those ports to communicate. This does not apply to
> multicast and broadcast addresses though. To prevent these leaks and
> make the function of port membership consistent UNICAST_VLAN_BOUNDARY
> should never be disabled.
>
> Note that UNICAST_VLAN_BOUNDARY is enabled by default in KSZ9477.
>
> Fixes: b987e98e50ab90e5 ("dsa: add DSA switch driver for Microchip KSZ9477")
> Signed-off-by: Tristram Ha <tristram...@microchip.com>
Reviewed-by: Florian Fainelli <f.faine...@gmail.com>
Thanks Tristram, much clearer!
--
Florian
