Re: [RFC PATCH 0/8] xilinx: tsn: Add TSN Endpoint Ethernet MAC driver support

On Fri, Feb 20, 2026 at 12:59:16PM +0000, Neeli, Srinivas wrote:

[AMD Official Use Only - AMD Internal Distribution Only]

Sorry, i'm not part of AMD...

quoted

So how does the host send a frame out Port 2? Is there an extra header
on the frame sent by EndPoint, which the switch interprets?

In this RFC, I configured all switch ports in forward mode. As a
result, when a frame is sent from the internal endpoint, it is
flooded to both external ports.  To forward packets to a specific
port instead of flooding, either static switch CAM entries need to
be configured or address learning should be enabled so the switch
can learn CAM entries dynamically.

Despite not being part of AMD, this part is important.

I don't care about how the RFC works, i want to know how the hardware
works, to ensure you have the correct choice of DSA vs pure switchdev.

Take the example of running Spanning Tree Protocol. The bridge needs
to send the BPDU out a specific port. What mechanism is used to do
that? It also needs to know which port a BPDU ingressed.

	Andrew