Re: [PATCH net-next 2/2] net: dsa: lan9303: Add basic offloading of unicast traffic
From: Andrew Lunn <andrew@lunn.ch>
Date: 2017-09-23 14:31:33
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The point is: Once both external ports are in "forwarding", I see no way to prevent traffic flowing directly between the external ports.
Generally, there are port vectors. Port X can send frames only to Port
Y.
If you don't have that, there are possibilities with VLANs. Each port
is given a unique VLAN. All incoming untagged traffic is tagged with
the VLAN. You just need to keep the VLAN separated and add/remove the
VLAN tag in the dsa tag driver.
Andrew