netdev - Re: [PATCH net-next v2 1/9] selftests: hsr: Add ping test for PRP

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Message-ID: <20260203134712.Q1vJp5UQ@linutronix.de>
Date: Tue, 3 Feb 2026 14:47:12 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Felix Maurer <fmaurer@...hat.com>
Cc: netdev@...r.kernel.org, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, horms@...nel.org,
	jkarrenpalo@...il.com, tglx@...utronix.de, mingo@...nel.org,
	allison.henderson@...cle.com, petrm@...dia.com, antonio@...nvpn.net
Subject: Re: [PATCH net-next v2 1/9] selftests: hsr: Add ping test for PRP

On 2026-02-03 13:23:50 [+0100], Felix Maurer wrote:
> But like you, I'm uncertain what would be the right thing to do and
> which port should control the MAC for all the others.

At the very least I need the same MAC on both ends for PTP.
Now that check the spec, 5.2.1.1 "HSR handling of multicast frames",
bottom below Figure 10, says it sends the frame over frame A and frame B
oder the ports. The "src-MAC + sequence number" uniquely identify the
same frame.
Now I am certain that the two different MACs are wrong. Let deal with
this later and then decide what to do about the testsuite.

> Thanks,
>    Felix

Sebastian