Re: RFC: Implementation of RFC 7217 [A Method for Generating Semantically Opaque Interface Identifiers, with IPv6 Stateless Address Autoconfiguration (SLAAC)]

From: Marek Zarychta <zarychtam_at_plan-b.pwste.edu.pl>
Date: Sun, 21 Dec 2025 10:57:24 UTC
On 20.12.2025 10:50, Guido Falsi wrote:
> On 12/20/25 10:20, Marek Zarychta wrote:
>> On 6.04.2025 16:49, Guido Falsi wrote:
>>> Hi!
>>>
>>> I have recently implemented and tested the patch at [1], which 
>>> implements RFC 7217, about generating IPv6 addresses that are 
>>> constant through reboots, but do not expose the MAC address of the 
>>> machine, not being in any way derived by those.
>>>
>>> I'd like to get comments, testing and review for this patch, with 
>>> the objective of getting approval to commit it to head once it is 
>>> streamlined enough.
>>>
>>> BTW I'd like to thank cognet for his suggestions and help with the 
>>> patch, in particular his help in finding the correct way to 
>>> implement the dad_failures counter.
>>>
>>>
>>> And thanks in advance to anyone willing to give feedback!
>>>
>>>
>>> [1] https://reviews.freebsd.org/D49681
>>>
>>>
>>
>> Hi Guido,
>> hi all,
>> everything works perfectly in 16.0-CURRENT and stable/15. Would it be 
>> possible to officially MFC this patch[2] to stable/15, given that 
>> 15.0- RELEASE has already been published?
>
> Hi,
>
> Yes, I plan to merge this to stable soon. But at present I'm a little 
> busy and overwhelmed with daily life and work so I  was planning to do 
> this in a short while.
>
> I'll be starting to work on MFCing this soon though.
>
Hi Giudo,
thank you for the reply. This is excellent news for all FreeBSD users 
who use IPv6 on their PCs and laptops. It will certainly be appreciated 
by the community. Additionally, as of today, we already know about at 
least one thing that will appear in FreeBSD 15.1.
Cheers

-- 
Marek Zarychta