Re: [PATCH net-next 4/4] net: mscc: ocelot: set up traps for PTP packets

On Fri, Nov 26, 2021 at 09:08:01AM -0800, Richard Cochran wrote:

On Fri, Nov 26, 2021 at 05:01:13PM +0000, Vladimir Oltean wrote:

quoted

This, to me, sounds more like the bridge trapping the packets on br0
instead of letting them flow on the port netdevices, which is solved by
some netfilter rules? Or is it really a driver/hardware issue?

https://lore.kernel.org/netdev/20211116102138.26vkpeh23el6akya@skbuf/ (local)

Yeah, thanks for the link.  I had seen it, but alas it came too late
for me to try on actual working HW.  Maybe it fixes the issue.

If someone out there has a Marvell switch, please try it and let us
know...

On the NXP LS1028A, PTP over IP, under a bridge, works with netfilter rules.
I have a Marvell 6390 switch which supposedly supports timestamping, but
I never got that to work, not even L2, and never had the time to sit
down with it and figure out what's wrong. I think I saw a discussion
initiated by George McCollister saying the same thing.