# Re: \[RFC net-next 1/2\] net: dsa: tag\_mtk: skip address learning on transmit to standalone ports

- From: DENG Qingfang \<dqfext@gmail.com\>
- Date: 2021-07-30 17:58:31 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2021/07/1463599
- Thread: https://ratatoskr.run/netdev/2021/07/1461210/t.md

```text
On Fri, Jul 30, 2021 at 08:41:35PM +0300, Vladimir Oltean wrote:
> On Fri, Jul 30, 2021 at 08:39:02PM +0300, Vladimir Oltean wrote:
> > Ah, mt7530 is one of the switches which has multiple CPU ports, I had
> > forgotten that. In that case, then static FDB entries are pretty much
> > the only way to go indeed.
> 
> I forget which ones are the modes in which the multi-CPU feature on
> mt7530 is supposed to be used: static assignment of user ports to CPU
> ports, or LAG between the CPU ports, or a mix of both?

MT7530 only supports static assignment, by changing the port matrix.

MT7531 also supports hardware LAG, but I don't think it's ideal because
its CPU ports have different speeds (one 1Gbps RGMII and the other 2.5Gbps
HSGMII).

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