Sorry Andrew, carry-forwarded IEEE's PMD naming convention of separating media "-CR" :D. Will stick to Ethtool :).
I was referring to "ETHTOOL_LINK_MODE_10000baseCR_FULL_Full_BIT" and its associated documentations Andrew.

- Thank you,
Siddaraju D H

-----Original Message-----
From: Andrew Lunn <andrew@lunn.ch> 
Sent: Friday, June 26, 2026 8:02 PM
To: D H, Siddaraju <redacted>
Cc: netdev@vger.kernel.org; Das, Shubham <redacted>; Chintalapalle, Balaji <redacted>; Srinivasan, Vijay <redacted>
Subject: Re: the confusing 10000base_CR. Shouldn't it be 10000_SFI_DA?

On Fri, Jun 26, 2026 at 02:15:27PM +0000, D H, Siddaraju wrote:

Hi Linux Ethernet Team,

We explored Ethtool's "10000base_CR" PMD PHY type and we think it 
might be just a wrong name.

~/linux$ grep -r 10000Base_CR
~/linux$ 

~/ethtool$ grep -r 10000Base_CR
~/ethtool$ 

What exactly do you mean by 10000Base_CR?

     Andrew