netdev - Re: The difference between linux kernel driver and FreeBSD's with Intel X533

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Date: Wed, 4 Oct 2023 09:42:21 -0700
From: Jesse Brandeburg <jesse.brandeburg@...el.com>
To: Skyler Mäntysaari <sm+lists@...m.fi>,
	<netdev@...r.kernel.org>
CC: <intel-wired-lan@...ts.osuosl.org>
Subject: Re: The difference between linux kernel driver and FreeBSD's with
 Intel X533

On 10/3/2023 4:25 PM, Skyler Mäntysaari wrote:
> Hi there,
> 
> It seems that for reasons unknown to me, my Intel X533 based 10G SFP+ 
> doesn't want to work with kernel 6.1.55 in VyOS 1.4 nor Debian 12 but it 
> does in OPNsense which is based on FreeBSD 13.2.
> 
> How would I go about debugging this properly? Both sides see light, but 
> no link unless I'm using FreeBSD.

have you tried setting the allow_unsupported_sfp=1 module parameter?
parm:           allow_unsupported_sfp:Allow unsupported and untested 
SFP+ modules on 82599-based adapters (bool)

> For reference the thread on VyOS forums regarding this: 
> https://forum.vyos.io/t/10g-sfp-trouble-with-linking-intel-x553/12253

Also, for troubleshooting it would be useful to have the output of 
ethtool -m eth0 from your device.

- Jesse