[RFC net-next 2/2] net: dsa: mt7530: trap packets from standalone ports to the CPU

[Vladimir Oltean]

On Sat, Jul 31, 2021 at 01:21:14AM +0800, DENG Qingfang wrote:
> I just found a cleaner solution: Leaving standalone ports in port matrix
> mode. As all bridges use independent VLAN learning, standalone ports'
> FDB lookup with FID 0 won't hit.

So standalone ports are completely VLAN-unaware and always use a FID of
0, ports under a VLAN-unaware bridge are in fallback mode (look up the
VLAN table but don't drop on miss), use a FID of 1-7, and ports under a
VLAN-aware bridge are in the security mode and use the CVID instead of
the FID for VLAN classification?

Make sure to test a mix of standalone, VLAN-unaware bridge and
VLAN-aware bridge with the same MAC address in all 3 domains. If that
works well this should be really good.