Re: [PATCH RFC net-next 05/19] net: dsa: tag_ar9331: add GRO callbacks

From: Alexander Lobakin
Date: Mon Jan 13 2020 - 04:46:32 EST


Vladimir Oltean wrote 13.01.2020 12:42:
Hi Alexander,

On Mon, 13 Jan 2020 at 11:22, Alexander Lobakin <alobakin@xxxxxxxx> wrote:

CPU ports can't be bridged anyway

Regards,
á á á á á á

The fact that CPU ports can't be bridged is already not ideal.
One can have a DSA switch with cascaded switches on each port, so it
acts like N DSA masters (not as DSA links, since the taggers are
incompatible), with each switch forming its own tree. It is desirable
that the ports of the DSA switch on top are bridged, so that
forwarding between cascaded switches does not pass through the CPU.

Oh, I see. But currently DSA infra forbids the adding DSA masters to
bridges IIRC. Can't name it good or bad decision, but was introduced
to prevent accidental packet flow breaking on DSA setups.

-Vladimir

Regards,
á á á á á á