Re: [PATCH net-next v2 5/9] selftests: hsr: Add tests for more link faults with PRP

[Sebastian Andrzej Siewior <bigeasy@linutronix.de>]

On 2026-01-22 15:57:00 [+0100], Felix Maurer wrote:
> Add tests where one link has different rates of packet loss or reorders
> packets. PRP should still be able to recover from these link faults and
> show no packet loss.  However, it is acceptable to receive some level of
> duplicate packets. This matches the current specification (IEC
> 62439-3:2021) of the duplicate discard algorithm that requires it to be
> "designed such that it never rejects a legitimate frame, while occasional
> acceptance of a duplicate can be tolerated." The rate of acceptable
> duplicates in this test is intentionally high (10%) to make the test
> stable, the values I observed in the worst test cases (20% loss) are around
> 5% duplicates.

Do you know why we have the duplicates? It is because of the high
sending rate at which point the blocks are dropped and we can't
recognise the duplicate?

> Signed-off-by: Felix Maurer <fmaurer@redhat.com>

Sebastian