The 07/26/2019 15:31, Nikolay Aleksandrov wrote: ... > You know that in order to not run in promisc mode you'll have to disable > port flooding and port learning, right ? Otherwise they're always put in promisc. Yes, we have spend some time looking at nbp_update_port_count and trying to understand the reasoning behind it. Our understanding is that this is to make it work with a pure SW bridge implementation, and this is actually an optimization to allow disable promisc mode if all forwarding is static (no flooding and no learning). We also noticed that the Ocelot and the Rocker drivers avoids this "issue" by not implementing promisc mode. But promisc mode is a really nice feature for debugging, and we would actually like to have it, and when HW that can do learning/flooding it does not seem to be necessary. I tried to understand how this is handled in the Mellanox drivers, but gave up. Too big, and we lack the insight in their design. Do you know if there are better ways to prevent switchdev-offloaded-slave interfaces to go to promisc mode? /Allan
