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Re: [v6ops] Implementation Status of PREF64

Owen DeLong <owen@delong.com> Sat, 25 September 2021 07:44 UTC

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From: Owen DeLong <owen@delong.com>
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Date: Sat, 25 Sep 2021 00:44:18 -0700
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Cc: Owen DeLong <owen=40delong.com@dmarc.ietf.org>, David Farmer <farmer=40umn.edu@dmarc.ietf.org>, V6 Ops List <v6ops@ietf.org>, Jen Linkova <furry@google.com>
To: Mark Smith <markzzzsmith@gmail.com>
References: <CAN-Dau2in52xSUkqKEXu=2AAiR4O_jLhna7hY-hshYDORfGtcQ@mail.gmail.com> <CAMGpriWFp4JPtqDK5tEj1RkS-SzEfvscfUUnxgK+o6qP2pusRA@mail.gmail.com> <6E95834D-12B3-447B-8326-8EDE9DC6FFB1@delong.com> <CAO42Z2zA-4cK489nxKsWUN8vvU0eAiz-jS0e-_eWPg+OmP8wLw@mail.gmail.com>
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Subject: Re: [v6ops] Implementation Status of PREF64
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DHCP by itself, no.

DHCP+NAC, well, yes… yes it does.

You see, with NAC (Network Admission Control), you don’t get on the network unless and/or until
you’ve properly completed the 802.1x authentication process and part of that includes (potentially)
requiring you to have an address that the DCHP server will vouch for being tied to your DUID and/or
MAC address.

So while the article you site is sort of correct to some extent as far as it goes, it presumes a set
of limitations on the network that isn’t true for many enterprise networks.

Owen


> On Sep 25, 2021, at 00:08 , Mark Smith <markzzzsmith@gmail.com> wrote:
> 
> 
> 
> On Sat, 25 Sep 2021, 12:55 Owen DeLong, <owen=40delong.com@dmarc.ietf.org <mailto:40delong.com@dmarc.ietf.org>> wrote:
> Now if they could only implement DHCPv6.
> 
> What problem would that solve?
> 
> It won't solve the problem of recording IPv6 addresses in use:
> 
> https://ipv6tao.blogspot.com/2021/09/the-stateful-dhcpv6-myth-no-it-doesnt.html <https://ipv6tao.blogspot.com/2021/09/the-stateful-dhcpv6-myth-no-it-doesnt.html>
> 
> 
> 
> 
> Owen
> 
> 
>> On Sep 24, 2021, at 3:26 PM, Erik Kline <ek.ietf@gmail.com <mailto:ek.ietf@gmail.com>> wrote:
>> 
>> My understanding is that Android supports <https://cs.android.com/android/_/android/platform/packages/modules/NetworkStack/+/70d7ffa59f1f4ac242d8409143108466025102c7> handling PREF64 RA options.
>> 
>> On Fri, Sep 24, 2021 at 10:21 AM David Farmer <farmer=40umn.edu@dmarc.ietf.org <mailto:40umn.edu@dmarc.ietf.org>> wrote:
>> Are there and host or router implementations of PREF64 (RFC8781) out in the wild yet?
>> 
>> Thanks
>> 
>> 
>> -- 
>> ===============================================
>> David Farmer               Email:farmer@umn.edu <mailto:Email%3Afarmer@umn.edu>
>> Networking & Telecommunication Services
>> Office of Information Technology
>> University of Minnesota   
>> 2218 University Ave SE        Phone: 612-626-0815
>> Minneapolis, MN 55414-3029   Cell: 612-812-9952
>> ===============================================
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