# 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 17:32:16 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/07/1463586
- Thread: https://ratatoskr.run/netdev/2021/07/1461210/t.md

```text
On Fri, Jul 30, 2021 at 07:24:03PM +0300, Vladimir Oltean wrote:
> Considering that you also have the option of setting
> ds->assisted_learning_on_cpu_port = true and this will have less false
> positives, what are the reasons why you did not choose that approach?

You're right. Hardware learning on CPU port does have some limitations.

I have been testing a multi CPU ports patch, and assisted learning has
to be used, because FDB entries should be installed like multicast
ones, which point to all CPU ports.
```