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List:       netbsd-tech-net
Subject:    Re: ixg and SFPs in NetBSD 10_RC1
From:       Hisashi T Fujinaka <htodd () twofifty ! com>
Date:       2023-11-26 22:51:44
Message-ID: 708f671d-0cf7-28f9-bc5d-a4be360f28f3 () twofifty ! com
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On Mon, 27 Nov 2023, Lloyd Parkes wrote:

> On Sun, 2023-11-26 at 21:35 +0000, David Brownlee wrote:
>>
>> Would it be worth test booting a FreeBSD or Linux image to see if
>> they
>> work under that (to confirm if it's a driver issue)?
>
>
> That's an idea. And Debian 12 also reports the DAC as an unsupported
> SFP.
>
> My working hypothesis is that since the Intel cards support 10GE and
> 1GE, the driver cares more about how the SFP describes itself. I'm
> pretty sure my Emulex and Mellanox cards only do 10GE and so the Linux
> drivers for those cards can afford to YOLO a bit more than the ixg
> driver.

Oh boy. I used to support these (well, x520, x550, mostly) in my day
job. SFP+ modules (you are using 10G, right?) can be horribly
non-compliant and have absolute garbage programmed into the module
EEPROM.

-- 
Hisashi T Fujinaka - htodd@twofifty.com
BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee
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