On 6/29/26, Andrew Lunn wrote,

Is there confusion? git blame suggests it has been there 10 years,
and this is the first time somebody has questioned it.

I would limit changes to Documentation, man pages, help etc.

Yes Andrew, as summarized in the first email of this thread, there
is no standard to explicitly support 10000baseCR and it conflicts with
so many characteristics of a "typical IEEE *baseCR". Based on my internal
discussion & feedback, it seems people are using 10000baseCR
with 10G-SFI-DA cables but the question "why should I set it to 10000baseCR
while using 10G_SFI_DACables?" keeps coming back along with the subsequent
questions to seek clarity against the "IEEE *baseCR" definitions.

This is an effort to settle it down for once & all. With option-(c) it is
just to add a clarity that 10000baseCR is SFF-8431 SFP+ Direct Attach (DA)
standard with SFI interface.

- Thank you,
Siddaraju D H