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To: Brian E Carpenter <brian.e.carpenter@gmail.com>, v6ops@ietf.org
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From: Lee Howard <lee@asgard.org>
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Subject: Re: [v6ops]  =?utf-8?q?Internet_engineers_tear_into_United_Nations=27?= =?utf-8?q?_plan_to_move_us_all_to_IPv6_=E2=80=A2_The_Register?=
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On 05/31/2018 05:32 PM, Brian E Carpenter wrote:
> On 01/06/2018 03:35, Lee Howard wrote:
>> I note that the IAB had a measured response:
>>
>> https://www.ietf.org/lib/dt/documents/LIAISON/liaison-2018-04-04-iab-itu-t-sg-20-response-to-liaison-1546-attachment-1.pdf
>>
>> I support that statement.
> I'm a little puzzled why this list wasn't informed of this statement
> at the time.

It didn't occur to me. Suresh informed the list when the SG20 liaison 
was originally sent.
I plead short-timer syndrome, since it was right around my last IETF on 
the IAB and as WG chair, and I was largely focused on clearing my plate 
of the thing right in front of me. I also didn't want to represent an 
IAB statement as an IETF consensus statement, but forwarding the 
statement to the list would not have created that confusion.

I think it is common for liaison statements to be sent to the IETF list, 
but I don't think it went there.

So, I completely own this, I'm the person who should have done it, and I 
allowed myself to get stuck into tunnel vision and did not think about 
how the broader IETF community would be interested in what we said.

I apologize for that.

Lee

>
>> Bearing in mind that I have no official position, and therefore any
>> opinions expressed below are mine only:
>>
>> The IETF, and any working group in it, has only one way to make a
>> statement: an RFC from the IETF stream. No other kind of document
>> requires IETF consensus, which is the only way to reflect an IETF
>> statement. I am skeptical that we can generate a timely consensus document.
>>
>> We don't need to say, "Stay out of our sandbox." Turf wars are stupid:
>> as engineers, we don't care who does the work, we care about the quality
>> of the work. Getting defensive is a sign that we care more about
>> protecting some interest than about making the Internet work better.
>>
>> Comments about the technical problems with the proposed model are
>> appropriate. I would include implementation considerations, such as the
>> potential for people to think the model is compulsory, or overrides
>> other local network considerations. However, I have no reason to believe
>> that comments on v6ops or other IETF mailing lists will be received by SG20.
> They can be, via our liaison channel. But it seems to be too late now
> (see above comment).
>
>      Brian
>
>> On those bases, RIPE may be a more effective place for discussion.
>>
>> Lee
>>
>>
>> On 05/30/2018 11:51 PM, Brian E Carpenter wrote:
>>> Ignoring the journalistic exaggerations in the article (2nd link below),
>>> do we have a liaison comment going to the ITU about this draft?
>>> https://regmedia.co.uk/2018/05/30/itu-ipv6-may18.pdf
>>> It seems to be an excellent recipe for burning up address space.
>>> The due date appears to be now.
>>>
>>> http://www.theregister.co.uk/2018/05/30/internet_engineers_united_nations_ipv6/
>>>
>>> Regards
>>>      Brian
>>>
>>>
>>> _______________________________________________
>>> v6ops mailing list
>>> v6ops@ietf.org
>>> https://www.ietf.org/mailman/listinfo/v6ops
>> _______________________________________________
>> v6ops mailing list
>> v6ops@ietf.org
>> https://www.ietf.org/mailman/listinfo/v6ops
>>


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From: Fred Baker <fredbaker.ietf@gmail.com>
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To: v6ops list <v6ops@ietf.org>, Lee Howard <lee@asgard.org>
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Subject: [v6ops] Personnel change for v6ops WG
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At IETF 102, we thanked Lee Howard for several years of service as one =
of the co-chairs. In this note, I'll thank him again - he's been more =
than an asset in our work. But he is moving on; $DAYJOB calls, and he =
needs to spend his time there. As of this morning, the Secretariat has =
made the relevant changes including the v6ops-chairs mailing list. I =
hope he won't go far...

Thanks Lee.

Fred

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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/vf1VERN2NkTOmQLhzwIwqXNr_yU>
Subject: Re: [v6ops] Personnel change for v6ops WG
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Thanks from all of us Lee.  =20
You have been great in SO many ways=21

Hopefully you will stay involved in some capacity=21

Take care

Mike



-----Original Message-----
From: v6ops =5Bmailto:v6ops-bounces=40ietf.org=5D On Behalf Of Fred Baker
Sent: Friday, June 1, 2018 10:32 AM
To: v6ops list <v6ops=40ietf.org>; Lee Howard <lee=40asgard.org>
Subject: =5Bv6ops=5D Personnel change for v6ops WG

At IETF 102, we thanked Lee Howard for several years of service as one of =
the co-chairs. In this note, I'll thank him again - he's been more than an =
asset in our work. But he is moving on; =24DAYJOB calls, and he needs to =
spend his time there. As of this morning, the Secretariat has made the =
relevant changes including the v6ops-chairs mailing list. I hope he won't =
go far...

Thanks Lee.

Fred


The information contained in this communication is highly confidential and =
is intended solely for the use of the individual(s) to whom this =
communication is directed. If you are not the intended recipient, you are =
hereby notified that any viewing, copying, disclosure or distribution of =
this information is prohibited. Please notify the sender, by electronic =
mail or telephone, of any unintended receipt and delete the original =
message without making any copies.
=20
 Blue Cross Blue Shield of Michigan and Blue Care Network of Michigan are =
nonprofit corporations and independent licensees of the Blue Cross and =
Blue Shield Association.


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The draft cut-off for IETF 102 is July 2 at 23:59 UTC. Getting on the =
agenda calls for list discussion before the event. That argues for you =
getting your drafts in *now*, and then asking the list to comment on =
your draft.



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From: nalini elkins <nalini.elkins@e-dco.com>
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+1

Nalini

On Fri, Jun 1, 2018 at 7:47 AM, Ackermann, Michael <MAckermann@bcbsm.com>
wrote:

> Thanks from all of us Lee.
> You have been great in SO many ways!
>
> Hopefully you will stay involved in some capacity!
>
> Take care
>
> Mike
>
>
>
> -----Original Message-----
> From: v6ops [mailto:v6ops-bounces@ietf.org] On Behalf Of Fred Baker
> Sent: Friday, June 1, 2018 10:32 AM
> To: v6ops list <v6ops@ietf.org>; Lee Howard <lee@asgard.org>
> Subject: [v6ops] Personnel change for v6ops WG
>
> At IETF 102, we thanked Lee Howard for several years of service as one of
> the co-chairs. In this note, I'll thank him again - he's been more than an
> asset in our work. But he is moving on; $DAYJOB calls, and he needs to
> spend his time there. As of this morning, the Secretariat has made the
> relevant changes including the v6ops-chairs mailing list. I hope he won't
> go far...
>
> Thanks Lee.
>
> Fred
>
>
> The information contained in this communication is highly confidential and
> is intended solely for the use of the individual(s) to whom this
> communication is directed. If you are not the intended recipient, you are
> hereby notified that any viewing, copying, disclosure or distribution of
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> mail or telephone, of any unintended receipt and delete the original
> message without making any copies.
>
>  Blue Cross Blue Shield of Michigan and Blue Care Network of Michigan are
> nonprofit corporations and independent licensees of the Blue Cross and Blue
> Shield Association.
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>



-- 
Thanks,
Nalini Elkins
President
Enterprise Data Center Operators
www.e-dco.com

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<div dir=3D"ltr">+1<div><br></div><div>Nalini</div></div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Fri, Jun 1, 2018 at 7:47 AM, Ack=
ermann, Michael <span dir=3D"ltr">&lt;<a href=3D"mailto:MAckermann@bcbsm.co=
m" target=3D"_blank">MAckermann@bcbsm.com</a>&gt;</span> wrote:<br><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc s=
olid;padding-left:1ex">Thanks from all of us Lee.=C2=A0 =C2=A0<br>
You have been great in SO many ways!<br>
<br>
Hopefully you will stay involved in some capacity!<br>
<br>
Take care<br>
<br>
Mike<br>
<br>
<br>
<br>
-----Original Message-----<br>
From: v6ops [mailto:<a href=3D"mailto:v6ops-bounces@ietf.org">v6ops-bounces=
@ietf.org</a><wbr>] On Behalf Of Fred Baker<br>
Sent: Friday, June 1, 2018 10:32 AM<br>
To: v6ops list &lt;<a href=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a>&gt;=
; Lee Howard &lt;<a href=3D"mailto:lee@asgard.org">lee@asgard.org</a>&gt;<b=
r>
Subject: [v6ops] Personnel change for v6ops WG<br>
<br>
At IETF 102, we thanked Lee Howard for several years of service as one of t=
he co-chairs. In this note, I&#39;ll thank him again - he&#39;s been more t=
han an asset in our work. But he is moving on; $DAYJOB calls, and he needs =
to spend his time there. As of this morning, the Secretariat has made the r=
elevant changes including the v6ops-chairs mailing list. I hope he won&#39;=
t go far...<br>
<br>
Thanks Lee.<br>
<br>
Fred<br>
<br>
<br>
The information contained in this communication is highly confidential and =
is intended solely for the use of the individual(s) to whom this communicat=
ion is directed. If you are not the intended recipient, you are hereby noti=
fied that any viewing, copying, disclosure or distribution of this informat=
ion is prohibited. Please notify the sender, by electronic mail or telephon=
e, of any unintended receipt and delete the original message without making=
 any copies.<br>
<br>
=C2=A0Blue Cross Blue Shield of Michigan and Blue Care Network of Michigan =
are nonprofit corporations and independent licensees of the Blue Cross and =
Blue Shield Association.<br>
<br>
______________________________<wbr>_________________<br>
v6ops mailing list<br>
<a href=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/v6ops</a><br>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div class=
=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><d=
iv><div dir=3D"ltr"><div style=3D"font-size:12.8px">Thanks,</div><div style=
=3D"font-size:12.8px">Nalini Elkins</div><div style=3D"font-size:12.8px">Pr=
esident</div><div style=3D"font-size:12.8px">Enterprise Data Center Operato=
rs</div><div style=3D"font-size:12.8px"><a href=3D"http://www.e-dco.com" ta=
rget=3D"_blank">www.e-dco.com</a></div><div><br></div></div></div></div></d=
iv>
</div>

--000000000000596579056d95f2ea--


From nobody Fri Jun  1 20:13:52 2018
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To: Lee Howard <lee@asgard.org>, v6ops@ietf.org
References: <17a0f0e1-c822-21e8-31e0-41c96ae1b2a5@gmail.com> <89a7eb01-e22f-f518-491a-822adae19003@asgard.org> <73132fdc-13f0-4171-a7fa-275d63f778db@gmail.com> <ebb036fb-a5ba-1d5c-bb71-771f2e05b48a@asgard.org>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Date: Sat, 2 Jun 2018 15:13:52 +1200
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Subject: Re: [v6ops]  =?utf-8?q?Internet_engineers_tear_into_United_Nations=27?= =?utf-8?q?_plan_to_move_us_all_to_IPv6_=E2=80=A2_The_Register?=
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On 02/06/2018 01:43, Lee Howard wrote:
> 
> 
> On 05/31/2018 05:32 PM, Brian E Carpenter wrote:
>> On 01/06/2018 03:35, Lee Howard wrote:
>>> I note that the IAB had a measured response:
>>>
>>> https://www.ietf.org/lib/dt/documents/LIAISON/liaison-2018-04-04-iab-itu-t-sg-20-response-to-liaison-1546-attachment-1.pdf
>>>
>>> I support that statement.
>> I'm a little puzzled why this list wasn't informed of this statement
>> at the time.
> 
> It didn't occur to me. Suresh informed the list when the SG20 liaison 
> was originally sent.
> I plead short-timer syndrome, since it was right around my last IETF on 
> the IAB and as WG chair, and I was largely focused on clearing my plate 
> of the thing right in front of me. I also didn't want to represent an 
> IAB statement as an IETF consensus statement, but forwarding the 
> statement to the list would not have created that confusion.
> 
> I think it is common for liaison statements to be sent to the IETF list, 
> but I don't think it went there.
> 
> So, I completely own this, I'm the person who should have done it, and I 
> allowed myself to get stuck into tunnel vision and did not think about 
> how the broader IETF community would be interested in what we said.
> 
> I apologize for that.

No, please don't, but thanks for explaining. I think the RIPE people have done
a good job on technical feedback, anyway.

   Brian

> 
> Lee
> 
>>
>>> Bearing in mind that I have no official position, and therefore any
>>> opinions expressed below are mine only:
>>>
>>> The IETF, and any working group in it, has only one way to make a
>>> statement: an RFC from the IETF stream. No other kind of document
>>> requires IETF consensus, which is the only way to reflect an IETF
>>> statement. I am skeptical that we can generate a timely consensus document.
>>>
>>> We don't need to say, "Stay out of our sandbox." Turf wars are stupid:
>>> as engineers, we don't care who does the work, we care about the quality
>>> of the work. Getting defensive is a sign that we care more about
>>> protecting some interest than about making the Internet work better.
>>>
>>> Comments about the technical problems with the proposed model are
>>> appropriate. I would include implementation considerations, such as the
>>> potential for people to think the model is compulsory, or overrides
>>> other local network considerations. However, I have no reason to believe
>>> that comments on v6ops or other IETF mailing lists will be received by SG20.
>> They can be, via our liaison channel. But it seems to be too late now
>> (see above comment).
>>
>>      Brian
>>
>>> On those bases, RIPE may be a more effective place for discussion.
>>>
>>> Lee
>>>
>>>
>>> On 05/30/2018 11:51 PM, Brian E Carpenter wrote:
>>>> Ignoring the journalistic exaggerations in the article (2nd link below),
>>>> do we have a liaison comment going to the ITU about this draft?
>>>> https://regmedia.co.uk/2018/05/30/itu-ipv6-may18.pdf
>>>> It seems to be an excellent recipe for burning up address space.
>>>> The due date appears to be now.
>>>>
>>>> http://www.theregister.co.uk/2018/05/30/internet_engineers_united_nations_ipv6/
>>>>
>>>> Regards
>>>>      Brian
>>>>
>>>>
>>>> _______________________________________________
>>>> v6ops mailing list
>>>> v6ops@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/v6ops
>>> _______________________________________________
>>> v6ops mailing list
>>> v6ops@ietf.org
>>> https://www.ietf.org/mailman/listinfo/v6ops
>>>
> 
> 


From nobody Mon Jun  4 18:16:09 2018
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From: Jen Linkova <furry13@gmail.com>
Date: Tue, 5 Jun 2018 11:15:41 +1000
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To: Lee Howard <lee@asgard.org>
Cc: Brian E Carpenter <brian.e.carpenter@gmail.com>, V6 Ops List <v6ops@ietf.org>
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Subject: Re: [v6ops]  =?utf-8?q?Internet_engineers_tear_into_United_Nations=27?= =?utf-8?q?_plan_to_move_us_all_to_IPv6_=E2=80=A2_The_Register?=
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On Fri, Jun 1, 2018 at 11:43 PM, Lee Howard <lee@asgard.org> wrote:
>>> I note that the IAB had a measured response:
>>> https://www.ietf.org/lib/dt/documents/LIAISON/liaison-2018-04-04-iab-itu-t-sg-20-response-to-liaison-1546-attachment-1.pdf
>> I'm a little puzzled why this list wasn't informed of this statement
>> at the time.

> It didn't occur to me. Suresh informed the list when the SG20 liaison was
> originally sent.
> I plead short-timer syndrome, since it was right around my last IETF on the
> IAB and as WG chair, and I was largely focused on clearing my plate of the
> thing right in front of me. I also didn't want to represent an IAB statement
> as an IETF consensus statement, but forwarding the statement to the list
> would not have created that confusion.
>
> I think it is common for liaison statements to be sent to the IETF list, but
> I don't think it went there.
>
> So, I completely own this, I'm the person who should have done it, and I
> allowed myself to get stuck into tunnel vision and did not think about how
> the broader IETF community would be interested in what we said.

[RIPE IPv6 WG co-chair hat on]  it's not your fault - I missed it as
well. I knew about the IAB response
and I *was told* the proposal was sent to the WG. So I *assumed* it
was (as I'm constantly behind my mailing
list subscriptions) and I did not verify it was discussed here.

Anyway the RIPE WG was very consistent in their feedback (and
discussion continued in the mailing list after the meeting,
https://www.ripe.net/ripe/mail/archives/ipv6-wg/2018-May/thread.html)

-- 
SY, Jen Linkova aka Furry


From nobody Tue Jun  5 06:20:03 2018
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From: Fioccola Giuseppe <giuseppe.fioccola@telecomitalia.it>
To: "v6ops@ietf.org" <v6ops@ietf.org>
CC: "Fred Baker (fredbaker.ietf@gmail.com)" <fredbaker.ietf@gmail.com>, "Bob Hinden (bob.hinden@gmail.com)" <bob.hinden@gmail.com>, =?utf-8?B?T2xlIFRyw7hhbiAob3Ryb2FuQGVtcGxveWVlcy5vcmcp?= <otroan@employees.org>, "Roberta Maglione (robmgl) (robmgl@cisco.com)" <robmgl@cisco.com>, "'draft-fioccola-v6ops-ipv6-alt-mark@ietf.org'" <draft-fioccola-v6ops-ipv6-alt-mark@ietf.org>, "6man-chairs@ietf.org" <6man-chairs@ietf.org>, "v6ops-chairs@ietf.org" <v6ops-chairs@ietf.org>, "Suresh Krishnan (suresh@kaloom.com)" <suresh@kaloom.com>
Thread-Topic: New Version Notification for draft-fioccola-v6ops-ipv6-alt-mark-01.txt
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Date: Tue, 5 Jun 2018 13:19:54 +0000
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Subject: [v6ops] FW: New Version Notification for draft-fioccola-v6ops-ipv6-alt-mark-01.txt
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From: Fioccola Giuseppe <giuseppe.fioccola@telecomitalia.it>
To: "v6ops@ietf.org" <v6ops@ietf.org>, "6man (6man@ietf.org)" <6man@ietf.org>,  "'ipv6@ietf.org'" <ipv6@ietf.org>
CC: "Fred Baker (fredbaker.ietf@gmail.com)" <fredbaker.ietf@gmail.com>, "Bob Hinden (bob.hinden@gmail.com)" <bob.hinden@gmail.com>, =?utf-8?B?T2xlIFRyw7hhbiAob3Ryb2FuQGVtcGxveWVlcy5vcmcp?= <otroan@employees.org>, "Roberta Maglione (robmgl) (robmgl@cisco.com)" <robmgl@cisco.com>, "draft-fioccola-v6ops-ipv6-alt-mark@ietf.org" <draft-fioccola-v6ops-ipv6-alt-mark@ietf.org>, "6man-chairs@ietf.org" <6man-chairs@ietf.org>, "v6ops-chairs@ietf.org" <v6ops-chairs@ietf.org>, "Suresh Krishnan (suresh@kaloom.com)" <suresh@kaloom.com>
Thread-Topic: New Version Notification for draft-fioccola-v6ops-ipv6-alt-mark-01.txt
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From: Richard Patterson <richard@helix.net.nz>
Date: Tue, 5 Jun 2018 21:02:40 +0100
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To: int-area@ietf.org, "v6ops@ietf.org list" <v6ops@ietf.org>, dhcwg@ietf.org
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Subject: [v6ops] Intro to draft-patterson-intarea-ipoe-health-00
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Hi All,

The above new draft has been posted to address an operational problem
that exists with current IPoE (non-PPPoE) fixed line broadband
services.
It can be found here:
https://datatracker.ietf.org/doc/draft-patterson-intarea-ipoe-health/

Hopefully the draft covers the problem statement sufficiently, but in
summary, PPPoE makes use of LCP echo/replies to detect WAN failures,
DHCPv4/6 currently has no such mechanism.
After backhaul migrations or BNG maintenance/failure, an IPoE client
can be left with a stale DHCP lease for up to the Valid Lifetime.

This draft proposes the use of regular ARP and ND for link monitoring,
to proactively expire DHCP leases early, and to trigger renewals or
getting a new lease from scratch.

The intarea WG was chosen as it doesn't neatly fit within the charters
of either v6ops or dhc, and because it proposes new DHCPv4 and DHCPv6
Options. Although we expect discussions in both of these WGs as well.

Thanks for comments already received from Ian, and Bernie, that helped
shape this -00.

-Richard


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From: Richard Patterson <richard@helix.net.nz>
Date: Wed, 6 Jun 2018 13:25:00 +0100
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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Hi Jordi,

I'm not sure that I agree with requirement TRANS-2:
"The IPv6 Transition CE Router MUST verify if the WAN link supports
native IPv4.  In that case, transition mechanisms SHOULD NOT be
automatically enabled for that interface."

In fact I'd suggest the exact opposite, if a CE Router receives valid
S46 DHCP Options, it SHOULD suspend its DHCPv4/PPP IPCP operations
until the WAN link status changes.  This could be expanded to include
a validation of a working IPv4aaS, but unsure how that should look.
For example, a brownfield IPv4aaS deployment is likely to still be
running dual stack in parallel whilst it migrates its clients to
IPv4aaS, the current wording would hinder this migration, by
preferring to stay on native (or NAT444) IPv4.

The "suspend" could also be debated, that it could be sufficient to
rely on the DHCPv4 back off mechanisms, but on a large network that
could still put a lot of extra load on the DHCPv4 server/relay and
RADIUS.   My vote is to suspend temporarily until reboot/WAN change.

And anecdotally, the current behaviour of OpenWRT is to prefer the S46
IPv4aaS mechanism, even when presented a valid DHCPv4 lease.

-Richard
On Mon, 28 May 2018 at 10:11, JORDI PALET MARTINEZ
<jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
>
> Hi Barbara,
>
> Sorry the late answer, last few weeks had been a non-stop traveling in 3 =
continents and too much work ...
>
> I see what you mean and we have discussed about this among the coauthors =
and amended the document, including some other comments received in the lis=
t.
>
> The new version has been published a few minutes ago:
>
> https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/?inc=
lude_text=3D1
>
> Basically, we are keeping a MUST for retail product versions, but not for=
 specific ISP versions. I hope you agree with this, as we believe it makes =
sense.
>
> We don't update anymore the RFC7084, and we just use the same style to ad=
d the requirements for an IPv6 Transition CE Router (and we use this termin=
ology across all the document).
>
> The main changes are summarized in the Annex C:
> 1.  ID-Nits: IANA section.
> 2.  ID-Nits: RFC7084 reference removed from Abstract.
> 3.  This document no longer updates RFC7084.
> 4.  UPnP section reworded.
> 5.  "CE Router" changed to "IPv6 Transition CE Router".
> 6.  Reduced text in Annex A.
>
> Hopefully everybody agrees now with this version, and in any case, will b=
e very helpful if we can get any inputs.
>
> Regards,
> Jordi
>
>
>
> =EF=BB=BF-----Mensaje original-----
> De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBARA H" <bs765=
2@att.com>
> Fecha: lunes, 30 de abril de 2018, 19:20
> Para: V6 Ops List <v6ops@ietf.org>
> Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.tx=
t
>
>     Hi Jordi,
>     I was having a hard time understanding where you were headed with pro=
posed changes, by following the email thread. So I was waiting for this upd=
ate. My company's email server also refuses to deliver to me some emails se=
nt to this list without telling me. That probably adds to my difficulty.
>
>     My suggestion related to making requirements "MUST" were tied to also=
 *not* making this an update to RFC 7084.
>
>     Here is the problem:
>     If this is an update to RFC 7084, then I cannot support any "MUST" st=
atements.
>     My employer makes use of RFC 7084. As is. Updating RFC 7084 with addi=
tional "MUST" statements impacts my employer's ability to use and reference=
 RFC 7084 to get the CE routers it wants. An RFC 7084 update with "MUST" st=
atements (that are not needed by many current deployments) would be harmful=
 to the existing IPv6 ecosystem.
>
>     For a device profile to be usable by the vendor and ISP community, it=
 must contain "MUST" statements for all items that need to be required to a=
chieve the profile's goal. Trying to get vendors to implement lots of "SHOU=
LD" statements is futile. As an individual contributor, I do not support IE=
TF publishing a futile device profile document with many "SHOULD" statement=
s.
>
>     The solution I have proposed is to create a brand new device profile.=
 A device profile for something called an "IPv6 Transition CE Router". This=
 device profile is not an update to RFC 7084. It is its own thing. It is fr=
ee to make use of RFC 7084 any way it wants -- not at all, in whole, or by =
referencing sections it does or doesn't want to require as part of the "IPv=
6 Transition CE Router" device profile.
>     Barbara
>
>     _______________________________________________
>     v6ops mailing list
>     v6ops@ietf.org
>     https://www.ietf.org/mailman/listinfo/v6ops
>
>
>
>
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>
> This electronic message contains information which may be privileged or c=
onfidential. The information is intended to be for the exclusive use of the=
 individual(s) named above and further non-explicilty authorized disclosure=
, copying, distribution or use of the contents of this information, even if=
 partially, including attached files, is strictly prohibited and will be co=
nsidered a criminal offense. If you are not the intended recipient be aware=
 that any disclosure, copying, distribution or use of the contents of this =
information, even if partially, including attached files, is strictly prohi=
bited, will be considered a criminal offense, so you must reply to the orig=
inal sender to inform about this communication and delete it.
>
>
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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Date: Wed, 06 Jun 2018 14:33:14 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "v6ops@ietf.org list" <v6ops@ietf.org>
Message-ID: <4C35EB79-A494-459B-8854-6FB2BAB1FF6E@consulintel.es>
Thread-Topic: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
References: <82CAB96F-B0FB-4E6F-A8FB-094C424F514F@consulintel.es> <CAHL_VyBb_R6A3C0gHL_vpfdfnNuqf-1Eq3vP8RwqhvZh205Xhg@mail.gmail.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/Bz9AjXjVSo_lY4z-jElPaniJ3yU>
Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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Hi Richard,

This is an interesting perspective ...

What we prefer "the best quality" that dual-stack can offer, or even if you=
 have lower quality, "push for IPv6" ?

Would not be better that if your network is offering already IPv4-as-a-serv=
ice, you stop DHCPv4/PPP ?

I think that way, you, the ISP, have a better control for those customers t=
hat you want to provide "native-IPv4" vs transition.

I will like to heard what other people believes about this.

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: v6ops <v6ops-bounces@ietf.org> en nombre de Richard Patterson <richard@=
helix.net.nz>
Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 14:26
Para: "v6ops@ietf.org list" <v6ops@ietf.org>, <jordi.palet=3D40consulintel.=
es@dmarc.ietf.org>
Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt

    Hi Jordi,
   =20
    I'm not sure that I agree with requirement TRANS-2:
    "The IPv6 Transition CE Router MUST verify if the WAN link supports
    native IPv4.  In that case, transition mechanisms SHOULD NOT be
    automatically enabled for that interface."
   =20
    In fact I'd suggest the exact opposite, if a CE Router receives valid
    S46 DHCP Options, it SHOULD suspend its DHCPv4/PPP IPCP operations
    until the WAN link status changes.  This could be expanded to include
    a validation of a working IPv4aaS, but unsure how that should look.
    For example, a brownfield IPv4aaS deployment is likely to still be
    running dual stack in parallel whilst it migrates its clients to
    IPv4aaS, the current wording would hinder this migration, by
    preferring to stay on native (or NAT444) IPv4.
   =20
    The "suspend" could also be debated, that it could be sufficient to
    rely on the DHCPv4 back off mechanisms, but on a large network that
    could still put a lot of extra load on the DHCPv4 server/relay and
    RADIUS.   My vote is to suspend temporarily until reboot/WAN change.
   =20
    And anecdotally, the current behaviour of OpenWRT is to prefer the S46
    IPv4aaS mechanism, even when presented a valid DHCPv4 lease.
   =20
    -Richard
    On Mon, 28 May 2018 at 10:11, JORDI PALET MARTINEZ
    <jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
    >
    > Hi Barbara,
    >
    > Sorry the late answer, last few weeks had been a non-stop traveling i=
n 3 continents and too much work ...
    >
    > I see what you mean and we have discussed about this among the coauth=
ors and amended the document, including some other comments received in the=
 list.
    >
    > The new version has been published a few minutes ago:
    >
    > https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/=
?include_text=3D1
    >
    > Basically, we are keeping a MUST for retail product versions, but not=
 for specific ISP versions. I hope you agree with this, as we believe it ma=
kes sense.
    >
    > We don't update anymore the RFC7084, and we just use the same style t=
o add the requirements for an IPv6 Transition CE Router (and we use this te=
rminology across all the document).
    >
    > The main changes are summarized in the Annex C:
    > 1.  ID-Nits: IANA section.
    > 2.  ID-Nits: RFC7084 reference removed from Abstract.
    > 3.  This document no longer updates RFC7084.
    > 4.  UPnP section reworded.
    > 5.  "CE Router" changed to "IPv6 Transition CE Router".
    > 6.  Reduced text in Annex A.
    >
    > Hopefully everybody agrees now with this version, and in any case, wi=
ll be very helpful if we can get any inputs.
    >
    > Regards,
    > Jordi
    >
    >
    >
    > =EF=BB=BF-----Mensaje original-----
    > De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBARA H" <b=
s7652@att.com>
    > Fecha: lunes, 30 de abril de 2018, 19:20
    > Para: V6 Ops List <v6ops@ietf.org>
    > Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-0=
0.txt
    >
    >     Hi Jordi,
    >     I was having a hard time understanding where you were headed with=
 proposed changes, by following the email thread. So I was waiting for this=
 update. My company's email server also refuses to deliver to me some email=
s sent to this list without telling me. That probably adds to my difficulty=
.
    >
    >     My suggestion related to making requirements "MUST" were tied to =
also *not* making this an update to RFC 7084.
    >
    >     Here is the problem:
    >     If this is an update to RFC 7084, then I cannot support any "MUST=
" statements.
    >     My employer makes use of RFC 7084. As is. Updating RFC 7084 with =
additional "MUST" statements impacts my employer's ability to use and refer=
ence RFC 7084 to get the CE routers it wants. An RFC 7084 update with "MUST=
" statements (that are not needed by many current deployments) would be har=
mful to the existing IPv6 ecosystem.
    >
    >     For a device profile to be usable by the vendor and ISP community=
, it must contain "MUST" statements for all items that need to be required =
to achieve the profile's goal. Trying to get vendors to implement lots of "=
SHOULD" statements is futile. As an individual contributor, I do not suppor=
t IETF publishing a futile device profile document with many "SHOULD" state=
ments.
    >
    >     The solution I have proposed is to create a brand new device prof=
ile. A device profile for something called an "IPv6 Transition CE Router". =
This device profile is not an update to RFC 7084. It is its own thing. It i=
s free to make use of RFC 7084 any way it wants -- not at all, in whole, or=
 by referencing sections it does or doesn't want to require as part of the =
"IPv6 Transition CE Router" device profile.
    >     Barbara
    >
    >     _______________________________________________
    >     v6ops mailing list
    >     v6ops@ietf.org
    >     https://www.ietf.org/mailman/listinfo/v6ops
    >
    >
    >
    >
    > **********************************************
    > IPv4 is over
    > Are you ready for the new Internet ?
    > http://www.consulintel.es
    > The IPv6 Company
    >
    > This electronic message contains information which may be privileged =
or confidential. The information is intended to be for the exclusive use of=
 the individual(s) named above and further non-explicilty authorized disclo=
sure, copying, distribution or use of the contents of this information, eve=
n if partially, including attached files, is strictly prohibited and will b=
e considered a criminal offense. If you are not the intended recipient be a=
ware that any disclosure, copying, distribution or use of the contents of t=
his information, even if partially, including attached files, is strictly p=
rohibited, will be considered a criminal offense, so you must reply to the =
original sender to inform about this communication and delete it.
    >
    >
    >
    > _______________________________________________
    > v6ops mailing list
    > v6ops@ietf.org
    > https://www.ietf.org/mailman/listinfo/v6ops
   =20
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.




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From: Richard Patterson <richard@helix.net.nz>
Date: Wed, 6 Jun 2018 13:54:03 +0100
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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At the moment the current wording overrides the presence of DHCPv6 S46
Options, this prevents the ISP from doing a per-subscriber granular
migration. eg. by including it within a RADIUS Access-Accept Attribute
or not.

Disabling of the DHCPv4 server forces a big bang migration strategy;
The ISP may not have the luxury to upgrade all the CPE types on the
network to ones that support IPv4aaS method, so a big bang migration
wouldn't be feasible.

Regarding the quality argument, this makes the assumption that all
IPv4aaS methods mentioned are worse than native IPv4.  There's no
qualification on if that native IPv4 is actually behind NAT444 or not.
I'd say that if the ISP is returning valid S46 Options, then they want
or even expect the client to make use of them, not ignore them.

-Richard
On Wed, 6 Jun 2018 at 13:34, JORDI PALET MARTINEZ
<jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
>
> Hi Richard,
>
> This is an interesting perspective ...
>
> What we prefer "the best quality" that dual-stack can offer, or even if y=
ou have lower quality, "push for IPv6" ?
>
> Would not be better that if your network is offering already IPv4-as-a-se=
rvice, you stop DHCPv4/PPP ?
>
> I think that way, you, the ISP, have a better control for those customers=
 that you want to provide "native-IPv4" vs transition.
>
> I will like to heard what other people believes about this.
>
> Regards,
> Jordi
>
>
>
> =EF=BB=BF-----Mensaje original-----
> De: v6ops <v6ops-bounces@ietf.org> en nombre de Richard Patterson <richar=
d@helix.net.nz>
> Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 14:26
> Para: "v6ops@ietf.org list" <v6ops@ietf.org>, <jordi.palet=3D40consulinte=
l.es@dmarc.ietf.org>
> Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.tx=
t
>
>     Hi Jordi,
>
>     I'm not sure that I agree with requirement TRANS-2:
>     "The IPv6 Transition CE Router MUST verify if the WAN link supports
>     native IPv4.  In that case, transition mechanisms SHOULD NOT be
>     automatically enabled for that interface."
>
>     In fact I'd suggest the exact opposite, if a CE Router receives valid
>     S46 DHCP Options, it SHOULD suspend its DHCPv4/PPP IPCP operations
>     until the WAN link status changes.  This could be expanded to include
>     a validation of a working IPv4aaS, but unsure how that should look.
>     For example, a brownfield IPv4aaS deployment is likely to still be
>     running dual stack in parallel whilst it migrates its clients to
>     IPv4aaS, the current wording would hinder this migration, by
>     preferring to stay on native (or NAT444) IPv4.
>
>     The "suspend" could also be debated, that it could be sufficient to
>     rely on the DHCPv4 back off mechanisms, but on a large network that
>     could still put a lot of extra load on the DHCPv4 server/relay and
>     RADIUS.   My vote is to suspend temporarily until reboot/WAN change.
>
>     And anecdotally, the current behaviour of OpenWRT is to prefer the S4=
6
>     IPv4aaS mechanism, even when presented a valid DHCPv4 lease.
>
>     -Richard
>     On Mon, 28 May 2018 at 10:11, JORDI PALET MARTINEZ
>     <jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
>     >
>     > Hi Barbara,
>     >
>     > Sorry the late answer, last few weeks had been a non-stop traveling=
 in 3 continents and too much work ...
>     >
>     > I see what you mean and we have discussed about this among the coau=
thors and amended the document, including some other comments received in t=
he list.
>     >
>     > The new version has been published a few minutes ago:
>     >
>     > https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aa=
s/?include_text=3D1
>     >
>     > Basically, we are keeping a MUST for retail product versions, but n=
ot for specific ISP versions. I hope you agree with this, as we believe it =
makes sense.
>     >
>     > We don't update anymore the RFC7084, and we just use the same style=
 to add the requirements for an IPv6 Transition CE Router (and we use this =
terminology across all the document).
>     >
>     > The main changes are summarized in the Annex C:
>     > 1.  ID-Nits: IANA section.
>     > 2.  ID-Nits: RFC7084 reference removed from Abstract.
>     > 3.  This document no longer updates RFC7084.
>     > 4.  UPnP section reworded.
>     > 5.  "CE Router" changed to "IPv6 Transition CE Router".
>     > 6.  Reduced text in Annex A.
>     >
>     > Hopefully everybody agrees now with this version, and in any case, =
will be very helpful if we can get any inputs.
>     >
>     > Regards,
>     > Jordi
>     >
>     >
>     >
>     > =EF=BB=BF-----Mensaje original-----
>     > De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBARA H" =
<bs7652@att.com>
>     > Fecha: lunes, 30 de abril de 2018, 19:20
>     > Para: V6 Ops List <v6ops@ietf.org>
>     > Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas=
-00.txt
>     >
>     >     Hi Jordi,
>     >     I was having a hard time understanding where you were headed wi=
th proposed changes, by following the email thread. So I was waiting for th=
is update. My company's email server also refuses to deliver to me some ema=
ils sent to this list without telling me. That probably adds to my difficul=
ty.
>     >
>     >     My suggestion related to making requirements "MUST" were tied t=
o also *not* making this an update to RFC 7084.
>     >
>     >     Here is the problem:
>     >     If this is an update to RFC 7084, then I cannot support any "MU=
ST" statements.
>     >     My employer makes use of RFC 7084. As is. Updating RFC 7084 wit=
h additional "MUST" statements impacts my employer's ability to use and ref=
erence RFC 7084 to get the CE routers it wants. An RFC 7084 update with "MU=
ST" statements (that are not needed by many current deployments) would be h=
armful to the existing IPv6 ecosystem.
>     >
>     >     For a device profile to be usable by the vendor and ISP communi=
ty, it must contain "MUST" statements for all items that need to be require=
d to achieve the profile's goal. Trying to get vendors to implement lots of=
 "SHOULD" statements is futile. As an individual contributor, I do not supp=
ort IETF publishing a futile device profile document with many "SHOULD" sta=
tements.
>     >
>     >     The solution I have proposed is to create a brand new device pr=
ofile. A device profile for something called an "IPv6 Transition CE Router"=
. This device profile is not an update to RFC 7084. It is its own thing. It=
 is free to make use of RFC 7084 any way it wants -- not at all, in whole, =
or by referencing sections it does or doesn't want to require as part of th=
e "IPv6 Transition CE Router" device profile.
>     >     Barbara
>     >
>     >     _______________________________________________
>     >     v6ops mailing list
>     >     v6ops@ietf.org
>     >     https://www.ietf.org/mailman/listinfo/v6ops
>     >
>     >
>     >
>     >
>     > **********************************************
>     > IPv4 is over
>     > Are you ready for the new Internet ?
>     > http://www.consulintel.es
>     > The IPv6 Company
>     >
>     > This electronic message contains information which may be privilege=
d or confidential. The information is intended to be for the exclusive use =
of the individual(s) named above and further non-explicilty authorized disc=
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>     >
>     >
>     >
>     > _______________________________________________
>     > v6ops mailing list
>     > v6ops@ietf.org
>     > https://www.ietf.org/mailman/listinfo/v6ops
>
>     _______________________________________________
>     v6ops mailing list
>     v6ops@ietf.org
>     https://www.ietf.org/mailman/listinfo/v6ops
>
>
>
>
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>
> This electronic message contains information which may be privileged or c=
onfidential. The information is intended to be for the exclusive use of the=
 individual(s) named above and further non-explicilty authorized disclosure=
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>
>
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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From: "STARK, BARBARA H" <bs7652@att.com>
To: "'Richard Patterson'" <richard@helix.net.nz>, "v6ops@ietf.org list" <v6ops@ietf.org>, "jordi.palet=40consulintel.es@dmarc.ietf.org" <jordi.palet=40consulintel.es@dmarc.ietf.org>
Thread-Topic: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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Date: Wed, 06 Jun 2018 15:41:01 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "v6ops@ietf.org list" <v6ops@ietf.org>
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Thread-Topic: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
References: <82CAB96F-B0FB-4E6F-A8FB-094C424F514F@consulintel.es> <CAHL_VyBb_R6A3C0gHL_vpfdfnNuqf-1Eq3vP8RwqhvZh205Xhg@mail.gmail.com> <4C35EB79-A494-459B-8854-6FB2BAB1FF6E@consulintel.es> <CAHL_VyCeC5XM=hA5UxqN_DjBWm_611cHJ05h_aXK+U9y2HOZpQ@mail.gmail.com>
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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Below in-line.

=EF=BB=BF-----Mensaje original-----
De: v6ops <v6ops-bounces@ietf.org> en nombre de Richard Patterson <richard@=
helix.net.nz>
Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 14:55
Para: "v6ops@ietf.org list" <v6ops@ietf.org>, <jordi.palet=3D40consulintel.=
es@dmarc.ietf.org>
Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt

    At the moment the current wording overrides the presence of DHCPv6 S46
    Options, this prevents the ISP from doing a per-subscriber granular
    migration. eg. by including it within a RADIUS Access-Accept Attribute
    or not.
   =20
    Disabling of the DHCPv4 server forces a big bang migration strategy;
    The ISP may not have the luxury to upgrade all the CPE types on the
    network to ones that support IPv4aaS method, so a big bang migration
    wouldn't be feasible.

If you stop DHCPv4/PPP for specific customers, you have the same per-subscr=
iber control, right ?
   =20
    Regarding the quality argument, this makes the assumption that all
    IPv4aaS methods mentioned are worse than native IPv4.  There's no
    qualification on if that native IPv4 is actually behind NAT444 or not.
    I'd say that if the ISP is returning valid S46 Options, then they want
    or even expect the client to make use of them, not ignore them.

Yeah, if you compare the quality of IPv4 with NAT444.

The problem I see if we change this behavior is that S46 only provides a so=
lution for some of the transition mechanism, not all, so for example, 464XL=
AT will not be able to work if we don't follow the current suggested approa=
ch.
   =20
    -Richard
    On Wed, 6 Jun 2018 at 13:34, JORDI PALET MARTINEZ
    <jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
    >
    > Hi Richard,
    >
    > This is an interesting perspective ...
    >
    > What we prefer "the best quality" that dual-stack can offer, or even =
if you have lower quality, "push for IPv6" ?
    >
    > Would not be better that if your network is offering already IPv4-as-=
a-service, you stop DHCPv4/PPP ?
    >
    > I think that way, you, the ISP, have a better control for those custo=
mers that you want to provide "native-IPv4" vs transition.
    >
    > I will like to heard what other people believes about this.
    >
    > Regards,
    > Jordi
    >
    >
    >
    > =EF=BB=BF-----Mensaje original-----
    > De: v6ops <v6ops-bounces@ietf.org> en nombre de Richard Patterson <ri=
chard@helix.net.nz>
    > Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 14:26
    > Para: "v6ops@ietf.org list" <v6ops@ietf.org>, <jordi.palet=3D40consul=
intel.es@dmarc.ietf.org>
    > Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-0=
0.txt
    >
    >     Hi Jordi,
    >
    >     I'm not sure that I agree with requirement TRANS-2:
    >     "The IPv6 Transition CE Router MUST verify if the WAN link suppor=
ts
    >     native IPv4.  In that case, transition mechanisms SHOULD NOT be
    >     automatically enabled for that interface."
    >
    >     In fact I'd suggest the exact opposite, if a CE Router receives v=
alid
    >     S46 DHCP Options, it SHOULD suspend its DHCPv4/PPP IPCP operation=
s
    >     until the WAN link status changes.  This could be expanded to inc=
lude
    >     a validation of a working IPv4aaS, but unsure how that should loo=
k.
    >     For example, a brownfield IPv4aaS deployment is likely to still b=
e
    >     running dual stack in parallel whilst it migrates its clients to
    >     IPv4aaS, the current wording would hinder this migration, by
    >     preferring to stay on native (or NAT444) IPv4.
    >
    >     The "suspend" could also be debated, that it could be sufficient =
to
    >     rely on the DHCPv4 back off mechanisms, but on a large network th=
at
    >     could still put a lot of extra load on the DHCPv4 server/relay an=
d
    >     RADIUS.   My vote is to suspend temporarily until reboot/WAN chan=
ge.
    >
    >     And anecdotally, the current behaviour of OpenWRT is to prefer th=
e S46
    >     IPv4aaS mechanism, even when presented a valid DHCPv4 lease.
    >
    >     -Richard
    >     On Mon, 28 May 2018 at 10:11, JORDI PALET MARTINEZ
    >     <jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
    >     >
    >     > Hi Barbara,
    >     >
    >     > Sorry the late answer, last few weeks had been a non-stop trave=
ling in 3 continents and too much work ...
    >     >
    >     > I see what you mean and we have discussed about this among the =
coauthors and amended the document, including some other comments received =
in the list.
    >     >
    >     > The new version has been published a few minutes ago:
    >     >
    >     > https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ip=
v4aas/?include_text=3D1
    >     >
    >     > Basically, we are keeping a MUST for retail product versions, b=
ut not for specific ISP versions. I hope you agree with this, as we believe=
 it makes sense.
    >     >
    >     > We don't update anymore the RFC7084, and we just use the same s=
tyle to add the requirements for an IPv6 Transition CE Router (and we use t=
his terminology across all the document).
    >     >
    >     > The main changes are summarized in the Annex C:
    >     > 1.  ID-Nits: IANA section.
    >     > 2.  ID-Nits: RFC7084 reference removed from Abstract.
    >     > 3.  This document no longer updates RFC7084.
    >     > 4.  UPnP section reworded.
    >     > 5.  "CE Router" changed to "IPv6 Transition CE Router".
    >     > 6.  Reduced text in Annex A.
    >     >
    >     > Hopefully everybody agrees now with this version, and in any ca=
se, will be very helpful if we can get any inputs.
    >     >
    >     > Regards,
    >     > Jordi
    >     >
    >     >
    >     >
    >     > =EF=BB=BF-----Mensaje original-----
    >     > De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBARA=
 H" <bs7652@att.com>
    >     > Fecha: lunes, 30 de abril de 2018, 19:20
    >     > Para: V6 Ops List <v6ops@ietf.org>
    >     > Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv=
4aas-00.txt
    >     >
    >     >     Hi Jordi,
    >     >     I was having a hard time understanding where you were heade=
d with proposed changes, by following the email thread. So I was waiting fo=
r this update. My company's email server also refuses to deliver to me some=
 emails sent to this list without telling me. That probably adds to my diff=
iculty.
    >     >
    >     >     My suggestion related to making requirements "MUST" were ti=
ed to also *not* making this an update to RFC 7084.
    >     >
    >     >     Here is the problem:
    >     >     If this is an update to RFC 7084, then I cannot support any=
 "MUST" statements.
    >     >     My employer makes use of RFC 7084. As is. Updating RFC 7084=
 with additional "MUST" statements impacts my employer's ability to use and=
 reference RFC 7084 to get the CE routers it wants. An RFC 7084 update with=
 "MUST" statements (that are not needed by many current deployments) would =
be harmful to the existing IPv6 ecosystem.
    >     >
    >     >     For a device profile to be usable by the vendor and ISP com=
munity, it must contain "MUST" statements for all items that need to be req=
uired to achieve the profile's goal. Trying to get vendors to implement lot=
s of "SHOULD" statements is futile. As an individual contributor, I do not =
support IETF publishing a futile device profile document with many "SHOULD"=
 statements.
    >     >
    >     >     The solution I have proposed is to create a brand new devic=
e profile. A device profile for something called an "IPv6 Transition CE Rou=
ter". This device profile is not an update to RFC 7084. It is its own thing=
. It is free to make use of RFC 7084 any way it wants -- not at all, in who=
le, or by referencing sections it does or doesn't want to require as part o=
f the "IPv6 Transition CE Router" device profile.
    >     >     Barbara
    >     >
    >     >     _______________________________________________
    >     >     v6ops mailing list
    >     >     v6ops@ietf.org
    >     >     https://www.ietf.org/mailman/listinfo/v6ops
    >     >
    >     >
    >     >
    >     >
    >     > **********************************************
    >     > IPv4 is over
    >     > Are you ready for the new Internet ?
    >     > http://www.consulintel.es
    >     > The IPv6 Company
    >     >
    >     > This electronic message contains information which may be privi=
leged or confidential. The information is intended to be for the exclusive =
use of the individual(s) named above and further non-explicilty authorized =
disclosure, copying, distribution or use of the contents of this informatio=
n, even if partially, including attached files, is strictly prohibited and =
will be considered a criminal offense. If you are not the intended recipien=
t be aware that any disclosure, copying, distribution or use of the content=
s of this information, even if partially, including attached files, is stri=
ctly prohibited, will be considered a criminal offense, so you must reply t=
o the original sender to inform about this communication and delete it.
    >     >
    >     >
    >     >
    >     > _______________________________________________
    >     > v6ops mailing list
    >     > v6ops@ietf.org
    >     > https://www.ietf.org/mailman/listinfo/v6ops
    >
    >     _______________________________________________
    >     v6ops mailing list
    >     v6ops@ietf.org
    >     https://www.ietf.org/mailman/listinfo/v6ops
    >
    >
    >
    >
    > **********************************************
    > IPv4 is over
    > Are you ready for the new Internet ?
    > http://www.consulintel.es
    > The IPv6 Company
    >
    > This electronic message contains information which may be privileged =
or confidential. The information is intended to be for the exclusive use of=
 the individual(s) named above and further non-explicilty authorized disclo=
sure, copying, distribution or use of the contents of this information, eve=
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ware that any disclosure, copying, distribution or use of the contents of t=
his information, even if partially, including attached files, is strictly p=
rohibited, will be considered a criminal offense, so you must reply to the =
original sender to inform about this communication and delete it.
    >
    >
    >
    > _______________________________________________
    > v6ops mailing list
    > v6ops@ietf.org
    > https://www.ietf.org/mailman/listinfo/v6ops
   =20
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
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Date: Wed, 06 Jun 2018 15:49:37 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "STARK, BARBARA H" <bs7652@att.com>, 'Richard Patterson' <richard@helix.net.nz>, "v6ops@ietf.org list" <v6ops@ietf.org>
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Thread-Topic: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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I see now the point, if you have already dual-stack ...=20

I think this (removing TRANS-2) may work then:


General transition requirements:

   TRANS-1:  If more than one S46 mechanism is supported, the IPv6
             Transition CE Router MUST support the DHCPv6 S46 priority
             option described in [RFC8026] (Unified IPv4-in-IPv6
             Softwire Customer Premises Equipment (CPE): A DHCPv6-Based
             Prioritization Mechanism).

   TRANS-2:  If 464XLAT [RFC6877] is
             supported, the IPv6 Transition CE Router MUST enable the
             CLAT (in order to automatically configure 464XLAT
             [RFC6877]).  If 464XLAT [RFC6877] is not supported, and
             more than one S46 mechanism is supported, following
             Section 1.4 of [RFC8026], MUST check for a valid match in
             OPTION_S46_PRIORITY, which will allow configuring any of
             the other transition mechanisms.


If we agree on this text, I can upload a new version with this change in a =
couple of days, unless there are new inputs in this part or others ...


Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBARA H" <bs7652@=
att.com>
Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 15:41
Para: 'Richard Patterson' <richard@helix.net.nz>, "v6ops@ietf.org list" <v6=
ops@ietf.org>, "jordi.palet=3D40consulintel.es@dmarc.ietf.org" <jordi.palet=
=3D40consulintel.es@dmarc.ietf.org>
Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt

    > At the moment the current wording overrides the presence of DHCPv6 S4=
6
    > Options, this prevents the ISP from doing a per-subscriber granular
    > migration. eg. by including it within a RADIUS Access-Accept Attribut=
e or not.
    >=20
    > Disabling of the DHCPv4 server forces a big bang migration strategy; =
The ISP
    > may not have the luxury to upgrade all the CPE types on the network t=
o ones
    > that support IPv4aaS method, so a big bang migration wouldn't be feas=
ible.
    >=20
    > Regarding the quality argument, this makes the assumption that all IP=
v4aaS
    > methods mentioned are worse than native IPv4.  There's no qualificati=
on on
    > if that native IPv4 is actually behind NAT444 or not.
    > I'd say that if the ISP is returning valid S46 Options, then they wan=
t or even
    > expect the client to make use of them, not ignore them.
    >=20
    > -Richard
   =20
    I think I agree with Richard on this. If an ISP already has dual stack =
deployed and is starting deployment of an IPv4aaS technology, or has simult=
aneously deployed dual stack with IPv4aaS, then the goal must clearly be to=
 move people to the IPv4aaS technology. If an ISP has IPv4aaS deployed, it =
is highly unlikely they will then deploy dual stack. So the presence of bot=
h dual stack and IPv4aaS must be an indication the ISP wants to move people=
 off dual stack and onto IPv4aaS.
   =20
    IPv4aaS should be the preferred connection in this case, in order to ac=
hieve a smoother transition. Note that IPv6 wasn't always "better" than IPv=
4 (it often had higher latency), but we still all agreed it should be "pref=
erred". I think this is the same.
    Barbara
   =20
   =20
    > On Wed, 6 Jun 2018 at 13:34, JORDI PALET MARTINEZ
    > <jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
    > >
    > > Hi Richard,
    > >
    > > This is an interesting perspective ...
    > >
    > > What we prefer "the best quality" that dual-stack can offer, or eve=
n if you
    > have lower quality, "push for IPv6" ?
    > >
    > > Would not be better that if your network is offering already IPv4-a=
s-a-
    > service, you stop DHCPv4/PPP ?
    > >
    > > I think that way, you, the ISP, have a better control for those cus=
tomers
    > that you want to provide "native-IPv4" vs transition.
    > >
    > > I will like to heard what other people believes about this.
    > >
    > > Regards,
    > > Jordi
    > >
    > >
    > >
    > > =EF=BB=BF-----Mensaje original-----
    > > De: v6ops <v6ops-bounces@ietf.org> en nombre de Richard Patterson
    > > <richard@helix.net.nz>
    > > Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 14:26
    > > Para: "v6ops@ietf.org list" <v6ops@ietf.org>,
    > > <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
    > > Asunto: Re: [v6ops] I-D Action:
    > > draft-ietf-v6ops-transition-ipv4aas-00.txt
    > >
    > >     Hi Jordi,
    > >
    > >     I'm not sure that I agree with requirement TRANS-2:
    > >     "The IPv6 Transition CE Router MUST verify if the WAN link supp=
orts
    > >     native IPv4.  In that case, transition mechanisms SHOULD NOT be
    > >     automatically enabled for that interface."
    > >
    > >     In fact I'd suggest the exact opposite, if a CE Router receives=
 valid
    > >     S46 DHCP Options, it SHOULD suspend its DHCPv4/PPP IPCP operati=
ons
    > >     until the WAN link status changes.  This could be expanded to i=
nclude
    > >     a validation of a working IPv4aaS, but unsure how that should l=
ook.
    > >     For example, a brownfield IPv4aaS deployment is likely to still=
 be
    > >     running dual stack in parallel whilst it migrates its clients t=
o
    > >     IPv4aaS, the current wording would hinder this migration, by
    > >     preferring to stay on native (or NAT444) IPv4.
    > >
    > >     The "suspend" could also be debated, that it could be sufficien=
t to
    > >     rely on the DHCPv4 back off mechanisms, but on a large network =
that
    > >     could still put a lot of extra load on the DHCPv4 server/relay =
and
    > >     RADIUS.   My vote is to suspend temporarily until reboot/WAN ch=
ange.
    > >
    > >     And anecdotally, the current behaviour of OpenWRT is to prefer =
the S46
    > >     IPv4aaS mechanism, even when presented a valid DHCPv4 lease.
    > >
    > >     -Richard
    > >     On Mon, 28 May 2018 at 10:11, JORDI PALET MARTINEZ
    > >     <jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
    > >     >
    > >     > Hi Barbara,
    > >     >
    > >     > Sorry the late answer, last few weeks had been a non-stop tra=
veling in
    > 3 continents and too much work ...
    > >     >
    > >     > I see what you mean and we have discussed about this among th=
e
    > coauthors and amended the document, including some other comments
    > received in the list.
    > >     >
    > >     > The new version has been published a few minutes ago:
    > >     >
    > >     > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
    > 3A__datatracker.ietf.org_doc_draft-2Dietf-2Dv6ops-2Dtransition-
    > 2Dipv4aas_-3Finclude-5Ftext-3D1&d=3DDwIGaQ&c=3DLFYZ-
    > o9_HUMeMTSQicvjIg&r=3DLoGzhC-
    > 8sc8SY8Tq4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
    > 1QkWKcGmMSW2ebo&s=3DGfrg561zGQIbQ4WjA7jTTQgT7zNcGfY1kQ5EGlq2kL
    > U&e=3D
    > >     >
    > >     > Basically, we are keeping a MUST for retail product versions,=
 but not for
    > specific ISP versions. I hope you agree with this, as we believe it m=
akes
    > sense.
    > >     >
    > >     > We don't update anymore the RFC7084, and we just use the same=
 style
    > to add the requirements for an IPv6 Transition CE Router (and we use =
this
    > terminology across all the document).
    > >     >
    > >     > The main changes are summarized in the Annex C:
    > >     > 1.  ID-Nits: IANA section.
    > >     > 2.  ID-Nits: RFC7084 reference removed from Abstract.
    > >     > 3.  This document no longer updates RFC7084.
    > >     > 4.  UPnP section reworded.
    > >     > 5.  "CE Router" changed to "IPv6 Transition CE Router".
    > >     > 6.  Reduced text in Annex A.
    > >     >
    > >     > Hopefully everybody agrees now with this version, and in any =
case, will
    > be very helpful if we can get any inputs.
    > >     >
    > >     > Regards,
    > >     > Jordi
    > >     >
    > >     >
    > >     >
    > >     > =EF=BB=BF-----Mensaje original-----
    > >     > De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBA=
RA
    > H" <bs7652@att.com>
    > >     > Fecha: lunes, 30 de abril de 2018, 19:20
    > >     > Para: V6 Ops List <v6ops@ietf.org>
    > >     > Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-i=
pv4aas-
    > 00.txt
    > >     >
    > >     >     Hi Jordi,
    > >     >     I was having a hard time understanding where you were hea=
ded with
    > proposed changes, by following the email thread. So I was waiting for=
 this
    > update. My company's email server also refuses to deliver to me some
    > emails sent to this list without telling me. That probably adds to my=
 difficulty.
    > >     >
    > >     >     My suggestion related to making requirements "MUST" were =
tied to
    > also *not* making this an update to RFC 7084.
    > >     >
    > >     >     Here is the problem:
    > >     >     If this is an update to RFC 7084, then I cannot support a=
ny "MUST"
    > statements.
    > >     >     My employer makes use of RFC 7084. As is. Updating RFC 70=
84 with
    > additional "MUST" statements impacts my employer's ability to use and
    > reference RFC 7084 to get the CE routers it wants. An RFC 7084 update=
 with
    > "MUST" statements (that are not needed by many current deployments)
    > would be harmful to the existing IPv6 ecosystem.
    > >     >
    > >     >     For a device profile to be usable by the vendor and ISP c=
ommunity, it
    > must contain "MUST" statements for all items that need to be required=
 to
    > achieve the profile's goal. Trying to get vendors to implement lots o=
f
    > "SHOULD" statements is futile. As an individual contributor, I do not=
 support
    > IETF publishing a futile device profile document with many "SHOULD"
    > statements.
    > >     >
    > >     >     The solution I have proposed is to create a brand new dev=
ice profile.
    > A device profile for something called an "IPv6 Transition CE Router".=
 This
    > device profile is not an update to RFC 7084. It is its own thing. It =
is free to
    > make use of RFC 7084 any way it wants -- not at all, in whole, or by
    > referencing sections it does or doesn't want to require as part of th=
e "IPv6
    > Transition CE Router" device profile.
    > >     >     Barbara
    > >     >
    > >     >     _______________________________________________
    > >     >     v6ops mailing list
    > >     >     v6ops@ietf.org
    > >     >     https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
    > 3A__www.ietf.org_mailman_listinfo_v6ops&d=3DDwIGaQ&c=3DLFYZ-
    > o9_HUMeMTSQicvjIg&r=3DLoGzhC-
    > 8sc8SY8Tq4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
    > 1QkWKcGmMSW2ebo&s=3DIfRxZ7pJ-2I-
    > LI4Ifdbgkpaa7DDwjUHIrdbW3rBB4Rc&e=3D
    > >     >
    > >     >
    > >     >
    > >     >
    > >     > **********************************************
    > >     > IPv4 is over
    > >     > Are you ready for the new Internet ?
    > >     > https://urldefense.proofpoint.com/v2/url?u=3Dhttp-
    > 3A__www.consulintel.es&d=3DDwIGaQ&c=3DLFYZ-
    > o9_HUMeMTSQicvjIg&r=3DLoGzhC-
    > 8sc8SY8Tq4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
    > 1QkWKcGmMSW2ebo&s=3Dy7RBDVf9Thf5nLmISjH_vjV9GfSNXTfnTqVQjIm2Kp
    > A&e=3D
    > >     > The IPv6 Company
    > >     >
    > >     > This electronic message contains information which may be pri=
vileged
    > or confidential. The information is intended to be for the exclusive =
use of the
    > individual(s) named above and further non-explicilty authorized discl=
osure,
    > copying, distribution or use of the contents of this information, eve=
n if
    > partially, including attached files, is strictly prohibited and will =
be considered a
    > criminal offense. If you are not the intended recipient be aware that=
 any
    > disclosure, copying, distribution or use of the contents of this info=
rmation,
    > even if partially, including attached files, is strictly prohibited, =
will be
    > considered a criminal offense, so you must reply to the original send=
er to
    > inform about this communication and delete it.
    > >     >
    > >     >
    > >     >
    > >     > _______________________________________________
    > >     > v6ops mailing list
    > >     > v6ops@ietf.org
    > >     >
    > > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
    > 3A__www.ietf.org_mail
    > > man_listinfo_v6ops&d=3DDwIGaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DLoGzhC=
-
    > 8sc8SY8T
    > > q4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
    > 1QkWKcGmMSW2ebo&s=3DIfRxZ7pJ-2I-LI
    > > 4Ifdbgkpaa7DDwjUHIrdbW3rBB4Rc&e=3D
    > >
    > >     _______________________________________________
    > >     v6ops mailing list
    > >     v6ops@ietf.org
    > >
    > > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
    > 3A__www.ietf.org_mail
    > > man_listinfo_v6ops&d=3DDwIGaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DLoGzhC=
-
    > 8sc8SY8T
    > > q4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
    > 1QkWKcGmMSW2ebo&s=3DIfRxZ7pJ-2I-LI
    > > 4Ifdbgkpaa7DDwjUHIrdbW3rBB4Rc&e=3D
    > >
    > >
    > >
    > >
    > > **********************************************
    > > IPv4 is over
    > > Are you ready for the new Internet ?
    > > https://urldefense.proofpoint.com/v2/url?u=3Dhttp-
    > 3A__www.consulintel.es
    > > &d=3DDwIGaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DLoGzhC-
    > 8sc8SY8Tq4vrfog&m=3D4mLE38cb
    > > hG6IbVnIC_-HCq-BqZC-
    > 1QkWKcGmMSW2ebo&s=3Dy7RBDVf9Thf5nLmISjH_vjV9GfSNXTfn
    > > TqVQjIm2KpA&e=3D
    > > The IPv6 Company
    > >
    > > This electronic message contains information which may be privilege=
d or
    > confidential. The information is intended to be for the exclusive use=
 of the
    > individual(s) named above and further non-explicilty authorized discl=
osure,
    > copying, distribution or use of the contents of this information, eve=
n if
    > partially, including attached files, is strictly prohibited and will =
be considered a
    > criminal offense. If you are not the intended recipient be aware that=
 any
    > disclosure, copying, distribution or use of the contents of this info=
rmation,
    > even if partially, including attached files, is strictly prohibited, =
will be
    > considered a criminal offense, so you must reply to the original send=
er to
    > inform about this communication and delete it.
    > >
    > >
    > >
    > > _______________________________________________
    > > v6ops mailing list
    > > v6ops@ietf.org
    > > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
    > 3A__www.ietf.org_mail
    > > man_listinfo_v6ops&d=3DDwIGaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DLoGzhC=
-
    > 8sc8SY8T
    > > q4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
    > 1QkWKcGmMSW2ebo&s=3DIfRxZ7pJ-2I-LI
    > > 4Ifdbgkpaa7DDwjUHIrdbW3rBB4Rc&e=3D
    >=20
    > _______________________________________________
    > v6ops mailing list
    > v6ops@ietf.org
    > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
    > 3A__www.ietf.org_mailman_listinfo_v6ops&d=3DDwIGaQ&c=3DLFYZ-
    > o9_HUMeMTSQicvjIg&r=3DLoGzhC-
    > 8sc8SY8Tq4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
    > 1QkWKcGmMSW2ebo&s=3DIfRxZ7pJ-2I-
    > LI4Ifdbgkpaa7DDwjUHIrdbW3rBB4Rc&e=3D
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.




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In-Reply-To: <92BC2DC8-85D1-4757-8426-E07C88088DCF@consulintel.es>
From: Richard Patterson <richard@helix.net.nz>
Date: Wed, 6 Jun 2018 15:41:05 +0100
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To: "v6ops@ietf.org list" <v6ops@ietf.org>, JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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That would address my concern.

On Wed, 6 Jun 2018 at 14:49, JORDI PALET MARTINEZ
<jordi.palet@consulintel.es> wrote:
>
> I see now the point, if you have already dual-stack ...
>
> I think this (removing TRANS-2) may work then:
>
>
> General transition requirements:
>
>    TRANS-1:  If more than one S46 mechanism is supported, the IPv6
>              Transition CE Router MUST support the DHCPv6 S46 priority
>              option described in [RFC8026] (Unified IPv4-in-IPv6
>              Softwire Customer Premises Equipment (CPE): A DHCPv6-Based
>              Prioritization Mechanism).
>
>    TRANS-2:  If 464XLAT [RFC6877] is
>              supported, the IPv6 Transition CE Router MUST enable the
>              CLAT (in order to automatically configure 464XLAT
>              [RFC6877]).  If 464XLAT [RFC6877] is not supported, and
>              more than one S46 mechanism is supported, following
>              Section 1.4 of [RFC8026], MUST check for a valid match in
>              OPTION_S46_PRIORITY, which will allow configuring any of
>              the other transition mechanisms.
>
>
> If we agree on this text, I can upload a new version with this change in =
a couple of days, unless there are new inputs in this part or others ...
>
>
> Regards,
> Jordi
>
>
>
> =EF=BB=BF-----Mensaje original-----
> De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBARA H" <bs765=
2@att.com>
> Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 15:41
> Para: 'Richard Patterson' <richard@helix.net.nz>, "v6ops@ietf.org list" <=
v6ops@ietf.org>, "jordi.palet=3D40consulintel.es@dmarc.ietf.org" <jordi.pal=
et=3D40consulintel.es@dmarc.ietf.org>
> Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.tx=
t
>
>     > At the moment the current wording overrides the presence of DHCPv6 =
S46
>     > Options, this prevents the ISP from doing a per-subscriber granular
>     > migration. eg. by including it within a RADIUS Access-Accept Attrib=
ute or not.
>     >
>     > Disabling of the DHCPv4 server forces a big bang migration strategy=
; The ISP
>     > may not have the luxury to upgrade all the CPE types on the network=
 to ones
>     > that support IPv4aaS method, so a big bang migration wouldn't be fe=
asible.
>     >
>     > Regarding the quality argument, this makes the assumption that all =
IPv4aaS
>     > methods mentioned are worse than native IPv4.  There's no qualifica=
tion on
>     > if that native IPv4 is actually behind NAT444 or not.
>     > I'd say that if the ISP is returning valid S46 Options, then they w=
ant or even
>     > expect the client to make use of them, not ignore them.
>     >
>     > -Richard
>
>     I think I agree with Richard on this. If an ISP already has dual stac=
k deployed and is starting deployment of an IPv4aaS technology, or has simu=
ltaneously deployed dual stack with IPv4aaS, then the goal must clearly be =
to move people to the IPv4aaS technology. If an ISP has IPv4aaS deployed, i=
t is highly unlikely they will then deploy dual stack. So the presence of b=
oth dual stack and IPv4aaS must be an indication the ISP wants to move peop=
le off dual stack and onto IPv4aaS.
>
>     IPv4aaS should be the preferred connection in this case, in order to =
achieve a smoother transition. Note that IPv6 wasn't always "better" than I=
Pv4 (it often had higher latency), but we still all agreed it should be "pr=
eferred". I think this is the same.
>     Barbara
>
>
>     > On Wed, 6 Jun 2018 at 13:34, JORDI PALET MARTINEZ
>     > <jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
>     > >
>     > > Hi Richard,
>     > >
>     > > This is an interesting perspective ...
>     > >
>     > > What we prefer "the best quality" that dual-stack can offer, or e=
ven if you
>     > have lower quality, "push for IPv6" ?
>     > >
>     > > Would not be better that if your network is offering already IPv4=
-as-a-
>     > service, you stop DHCPv4/PPP ?
>     > >
>     > > I think that way, you, the ISP, have a better control for those c=
ustomers
>     > that you want to provide "native-IPv4" vs transition.
>     > >
>     > > I will like to heard what other people believes about this.
>     > >
>     > > Regards,
>     > > Jordi
>     > >
>     > >
>     > >
>     > > =EF=BB=BF-----Mensaje original-----
>     > > De: v6ops <v6ops-bounces@ietf.org> en nombre de Richard Patterson
>     > > <richard@helix.net.nz>
>     > > Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 14:26
>     > > Para: "v6ops@ietf.org list" <v6ops@ietf.org>,
>     > > <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
>     > > Asunto: Re: [v6ops] I-D Action:
>     > > draft-ietf-v6ops-transition-ipv4aas-00.txt
>     > >
>     > >     Hi Jordi,
>     > >
>     > >     I'm not sure that I agree with requirement TRANS-2:
>     > >     "The IPv6 Transition CE Router MUST verify if the WAN link su=
pports
>     > >     native IPv4.  In that case, transition mechanisms SHOULD NOT =
be
>     > >     automatically enabled for that interface."
>     > >
>     > >     In fact I'd suggest the exact opposite, if a CE Router receiv=
es valid
>     > >     S46 DHCP Options, it SHOULD suspend its DHCPv4/PPP IPCP opera=
tions
>     > >     until the WAN link status changes.  This could be expanded to=
 include
>     > >     a validation of a working IPv4aaS, but unsure how that should=
 look.
>     > >     For example, a brownfield IPv4aaS deployment is likely to sti=
ll be
>     > >     running dual stack in parallel whilst it migrates its clients=
 to
>     > >     IPv4aaS, the current wording would hinder this migration, by
>     > >     preferring to stay on native (or NAT444) IPv4.
>     > >
>     > >     The "suspend" could also be debated, that it could be suffici=
ent to
>     > >     rely on the DHCPv4 back off mechanisms, but on a large networ=
k that
>     > >     could still put a lot of extra load on the DHCPv4 server/rela=
y and
>     > >     RADIUS.   My vote is to suspend temporarily until reboot/WAN =
change.
>     > >
>     > >     And anecdotally, the current behaviour of OpenWRT is to prefe=
r the S46
>     > >     IPv4aaS mechanism, even when presented a valid DHCPv4 lease.
>     > >
>     > >     -Richard
>     > >     On Mon, 28 May 2018 at 10:11, JORDI PALET MARTINEZ
>     > >     <jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
>     > >     >
>     > >     > Hi Barbara,
>     > >     >
>     > >     > Sorry the late answer, last few weeks had been a non-stop t=
raveling in
>     > 3 continents and too much work ...
>     > >     >
>     > >     > I see what you mean and we have discussed about this among =
the
>     > coauthors and amended the document, including some other comments
>     > received in the list.
>     > >     >
>     > >     > The new version has been published a few minutes ago:
>     > >     >
>     > >     > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>     > 3A__datatracker.ietf.org_doc_draft-2Dietf-2Dv6ops-2Dtransition-
>     > 2Dipv4aas_-3Finclude-5Ftext-3D1&d=3DDwIGaQ&c=3DLFYZ-
>     > o9_HUMeMTSQicvjIg&r=3DLoGzhC-
>     > 8sc8SY8Tq4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
>     > 1QkWKcGmMSW2ebo&s=3DGfrg561zGQIbQ4WjA7jTTQgT7zNcGfY1kQ5EGlq2kL
>     > U&e=3D
>     > >     >
>     > >     > Basically, we are keeping a MUST for retail product version=
s, but not for
>     > specific ISP versions. I hope you agree with this, as we believe it=
 makes
>     > sense.
>     > >     >
>     > >     > We don't update anymore the RFC7084, and we just use the sa=
me style
>     > to add the requirements for an IPv6 Transition CE Router (and we us=
e this
>     > terminology across all the document).
>     > >     >
>     > >     > The main changes are summarized in the Annex C:
>     > >     > 1.  ID-Nits: IANA section.
>     > >     > 2.  ID-Nits: RFC7084 reference removed from Abstract.
>     > >     > 3.  This document no longer updates RFC7084.
>     > >     > 4.  UPnP section reworded.
>     > >     > 5.  "CE Router" changed to "IPv6 Transition CE Router".
>     > >     > 6.  Reduced text in Annex A.
>     > >     >
>     > >     > Hopefully everybody agrees now with this version, and in an=
y case, will
>     > be very helpful if we can get any inputs.
>     > >     >
>     > >     > Regards,
>     > >     > Jordi
>     > >     >
>     > >     >
>     > >     >
>     > >     > =EF=BB=BF-----Mensaje original-----
>     > >     > De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BAR=
BARA
>     > H" <bs7652@att.com>
>     > >     > Fecha: lunes, 30 de abril de 2018, 19:20
>     > >     > Para: V6 Ops List <v6ops@ietf.org>
>     > >     > Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition=
-ipv4aas-
>     > 00.txt
>     > >     >
>     > >     >     Hi Jordi,
>     > >     >     I was having a hard time understanding where you were h=
eaded with
>     > proposed changes, by following the email thread. So I was waiting f=
or this
>     > update. My company's email server also refuses to deliver to me som=
e
>     > emails sent to this list without telling me. That probably adds to =
my difficulty.
>     > >     >
>     > >     >     My suggestion related to making requirements "MUST" wer=
e tied to
>     > also *not* making this an update to RFC 7084.
>     > >     >
>     > >     >     Here is the problem:
>     > >     >     If this is an update to RFC 7084, then I cannot support=
 any "MUST"
>     > statements.
>     > >     >     My employer makes use of RFC 7084. As is. Updating RFC =
7084 with
>     > additional "MUST" statements impacts my employer's ability to use a=
nd
>     > reference RFC 7084 to get the CE routers it wants. An RFC 7084 upda=
te with
>     > "MUST" statements (that are not needed by many current deployments)
>     > would be harmful to the existing IPv6 ecosystem.
>     > >     >
>     > >     >     For a device profile to be usable by the vendor and ISP=
 community, it
>     > must contain "MUST" statements for all items that need to be requir=
ed to
>     > achieve the profile's goal. Trying to get vendors to implement lots=
 of
>     > "SHOULD" statements is futile. As an individual contributor, I do n=
ot support
>     > IETF publishing a futile device profile document with many "SHOULD"
>     > statements.
>     > >     >
>     > >     >     The solution I have proposed is to create a brand new d=
evice profile.
>     > A device profile for something called an "IPv6 Transition CE Router=
". This
>     > device profile is not an update to RFC 7084. It is its own thing. I=
t is free to
>     > make use of RFC 7084 any way it wants -- not at all, in whole, or b=
y
>     > referencing sections it does or doesn't want to require as part of =
the "IPv6
>     > Transition CE Router" device profile.
>     > >     >     Barbara
>     > >     >
>     > >     >     _______________________________________________
>     > >     >     v6ops mailing list
>     > >     >     v6ops@ietf.org
>     > >     >     https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>     > 3A__www.ietf.org_mailman_listinfo_v6ops&d=3DDwIGaQ&c=3DLFYZ-
>     > o9_HUMeMTSQicvjIg&r=3DLoGzhC-
>     > 8sc8SY8Tq4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
>     > 1QkWKcGmMSW2ebo&s=3DIfRxZ7pJ-2I-
>     > LI4Ifdbgkpaa7DDwjUHIrdbW3rBB4Rc&e=3D
>     > >     >
>     > >     >
>     > >     >
>     > >     >
>     > >     > **********************************************
>     > >     > IPv4 is over
>     > >     > Are you ready for the new Internet ?
>     > >     > https://urldefense.proofpoint.com/v2/url?u=3Dhttp-
>     > 3A__www.consulintel.es&d=3DDwIGaQ&c=3DLFYZ-
>     > o9_HUMeMTSQicvjIg&r=3DLoGzhC-
>     > 8sc8SY8Tq4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
>     > 1QkWKcGmMSW2ebo&s=3Dy7RBDVf9Thf5nLmISjH_vjV9GfSNXTfnTqVQjIm2Kp
>     > A&e=3D
>     > >     > The IPv6 Company
>     > >     >
>     > >     > This electronic message contains information which may be p=
rivileged
>     > or confidential. The information is intended to be for the exclusiv=
e use of the
>     > individual(s) named above and further non-explicilty authorized dis=
closure,
>     > copying, distribution or use of the contents of this information, e=
ven if
>     > partially, including attached files, is strictly prohibited and wil=
l be considered a
>     > criminal offense. If you are not the intended recipient be aware th=
at any
>     > disclosure, copying, distribution or use of the contents of this in=
formation,
>     > even if partially, including attached files, is strictly prohibited=
, will be
>     > considered a criminal offense, so you must reply to the original se=
nder to
>     > inform about this communication and delete it.
>     > >     >
>     > >     >
>     > >     >
>     > >     > _______________________________________________
>     > >     > v6ops mailing list
>     > >     > v6ops@ietf.org
>     > >     >
>     > > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>     > 3A__www.ietf.org_mail
>     > > man_listinfo_v6ops&d=3DDwIGaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DLoGz=
hC-
>     > 8sc8SY8T
>     > > q4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
>     > 1QkWKcGmMSW2ebo&s=3DIfRxZ7pJ-2I-LI
>     > > 4Ifdbgkpaa7DDwjUHIrdbW3rBB4Rc&e=3D
>     > >
>     > >     _______________________________________________
>     > >     v6ops mailing list
>     > >     v6ops@ietf.org
>     > >
>     > > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>     > 3A__www.ietf.org_mail
>     > > man_listinfo_v6ops&d=3DDwIGaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DLoGz=
hC-
>     > 8sc8SY8T
>     > > q4vrfog&m=3D4mLE38cbhG6IbVnIC_-HCq-BqZC-
>     > 1QkWKcGmMSW2ebo&s=3DIfRxZ7pJ-2I-LI
>     > > 4Ifdbgkpaa7DDwjUHIrdbW3rBB4Rc&e=3D
>     > >
>     > >
>     > >
>     > >
>     > > **********************************************
>     > > IPv4 is over
>     > > Are you ready for the new Internet ?
>     > > https://urldefense.proofpoint.com/v2/url?u=3Dhttp-
>     > 3A__www.consulintel.es
>     > > &d=3DDwIGaQ&c=3DLFYZ-o9_HUMeMTSQicvjIg&r=3DLoGzhC-
>     > 8sc8SY8Tq4vrfog&m=3D4mLE38cb
>     > > hG6IbVnIC_-HCq-BqZC-
>     > 1QkWKcGmMSW2ebo&s=3Dy7RBDVf9Thf5nLmISjH_vjV9GfSNXTfn
>     > > TqVQjIm2KpA&e=3D
>     > > The IPv6 Company
>     > >
>     > > This electronic message contains information which may be privile=
ged or
>     > confidential. The information is intended to be for the exclusive u=
se of the
>     > individual(s) named above and further non-explicilty authorized dis=
closure,
>     > copying, distribution or use of the contents of this information, e=
ven if
>     > partially, including attached files, is strictly prohibited and wil=
l be considered a
>     > criminal offense. If you are not the intended recipient be aware th=
at any
>     > disclosure, copying, distribution or use of the contents of this in=
formation,
>     > even if partially, including attached files, is strictly prohibited=
, will be
>     > considered a criminal offense, so you must reply to the original se=
nder to
>     > inform about this communication and delete it.
>     > >
>     > >
>     > >
>     > > _______________________________________________
>     > > v6ops mailing list
>     > > v6ops@ietf.org
>     > > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
>     > 3A__www.ietf.org_mail
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hC-
>     > 8sc8SY8T
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>     > 1QkWKcGmMSW2ebo&s=3DIfRxZ7pJ-2I-LI
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>     >
>     > _______________________________________________
>     > v6ops mailing list
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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "STARK, BARBARA H" <bs7652@att.com>, "v6ops@ietf.org list" <v6ops@ietf.org>
Message-ID: <5A741202-FAB8-4785-A624-28D62650FB1C@consulintel.es>
Thread-Topic: transition-ipv4aas-01: 464XLAT and NAT
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Subject: Re: [v6ops] transition-ipv4aas-01: 464XLAT and NAT
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Hi Barbara,

It is following section 6.3 of RFC6877 (464XLAT).

It is true that RFC8273 is much more recent, and obviously it was not consi=
dered, but in a quick consideration I think it is a very complex scenario, =
if you're using DHCPv6-PD to also use RFC8273 ...

It may be possible, but I'm not completely sure if you are thinking in some=
 specific scenario that I don't see right now?

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: "STARK, BARBARA H" <bs7652@att.com>
Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 16:44
Para: 'JORDI PALET MARTINEZ' <jordi.palet@consulintel.es>, "v6ops@ietf.org =
list" <v6ops@ietf.org>
Asunto: transition-ipv4aas-01: 464XLAT and NAT

    I see:
         464XLAT-1:  The IPv6 Transition CE Router MUST perform IPv4 Networ=
k
                   Address Translation (NAT) on IPv4 traffic translated
                   using the CLAT, unless a dedicated /64 prefix has been
                   acquired using DHCPv6-PD [RFC3633] (IPv6 Prefix Options
                   for DHCPv6).
    and am curious why the dedicated /64 prefix exclusion applies only to a=
 prefix acquired by IA_PD, and not one acquired by RFC 8273?=20
   =20



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Date: Wed, 06 Jun 2018 17:21:59 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "STARK, BARBARA H" <bs7652@att.com>, "v6ops@ietf.org list" <v6ops@ietf.org>
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    >    TRANS-2:  If 464XLAT [RFC6877] is
    >              supported, the IPv6 Transition CE Router MUST enable the
    >              CLAT (in order to automatically configure 464XLAT
    >              [RFC6877]).  If 464XLAT [RFC6877] is not supported, and
    >              more than one S46 mechanism is supported, following
    >              Section 1.4 of [RFC8026], MUST check for a valid match in
    >              OPTION_S46_PRIORITY, which will allow configuring any of
    >              the other transition mechanisms.
    
    I think the comingling of "supported" and "enabled" is problematic in this requirement. 
    "Supported" means (to most people) the same as "implemented". That is, the code exists. "Enabled" means the supported code is actually running. Just because 464XLAT is supported does not mean it is enabled. If 464XLAT is not enabled, then it may not be a good idea to automatically enable CLAT. And, likewise, the other mechanisms should only be configured if they are enabled and not merely supported. I suggest changing all instances of "supported" to "enabled" in this requirement.

-> That's why the requirement is, using other words: If 464XLAT is implemented in this CE, enable it (by means of enabling the CLAT). I'm talking here only in the CE, because the S46 doesn't include support for 464XLAT, so we can't use it to check it ...

    
    I haven't gone through the entire document yet, but you may want to look for other cases where you use "supported" where you really should use "enabled". TRANS-1 is fine because it really is just talking about ensuring the code exists (is implemented) on the device. You may also want to consider requirements for conditions under which some of the supported features are automatically enabled. For example, for 464XLAT, should PCP (if implemented) be automatically enabled when 464XLAT is enabled? Or when CLAT is enabled?

-> Will do, anyway, I can wait a few extra days if you will have time to do an in-depth review of the document?
    
    We may also want to consider whether to recommend that a Transition CE Router by default has all these mechanisms enabled. There should probably also be a requirement that indicates it should be possible to enable/disable any of these mechanisms. At this stage if the game, we need to be sure we can defend against brokenness. 

-> I think in the case of all the other transition, this can be done by means of S46, but will review again this point, just in case something else need to be suggested/amended. Of course, in general I expect the CEs to implement in the CLI or GUI, or other management interfaces (as they do today) a way to explicitly disable/enable a mechanism. Do you think we should have that as an explicit requirement?

    Barbara
    



**********************************************
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To: "'JORDI PALET MARTINEZ'" <jordi.palet@consulintel.es>, "v6ops@ietf.org list" <v6ops@ietf.org>
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From: "STARK, BARBARA H" <bs7652@att.com>
To: "'JORDI PALET MARTINEZ'" <jordi.palet@consulintel.es>, "v6ops@ietf.org list" <v6ops@ietf.org>
Thread-Topic: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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Date: Wed, 6 Jun 2018 16:01:42 +0000
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "STARK, BARBARA H" <bs7652@att.com>, "v6ops@ietf.org list" <v6ops@ietf.org>
Message-ID: <3F26BC3B-6537-4321-92B5-DE04603A7F68@consulintel.es>
Thread-Topic: transition-ipv4aas-01: 464XLAT and NAT
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Subject: Re: [v6ops] transition-ipv4aas-01: 464XLAT and NAT
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I guess the point is that whatever is the mechanism you use to provision th=
e /64 prefixes, the CE need to make sure to use it only for the CLAT, but a=
nyway that's out of our scope ... it is something for the RFC6877.

I see two choices:

1) Make it an example

          464XLAT-1:  The IPv6 Transition CE Router MUST perform IPv4 Netwo=
rk
                    Address Translation (NAT) on IPv4 traffic translated
                    using the CLAT, unless a dedicated /64 prefix has been
                    acquired, for example as indicated in Section 6.3 of RF=
C6877,
                    using DHCPv6-PD [RFC3633] (IPv6 Prefix Options for DHCP=
v6).

2) Remove it

          464XLAT-1:  The IPv6 Transition CE Router MUST perform IPv4 Netwo=
rk
                    Address Translation (NAT) on IPv4 traffic translated
                    using the CLAT, unless a dedicated /64 prefix has been
                    acquired.

I think the example in choice 1, make sense to match the RFC6877 text, but =
I'm fine either way.

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: "STARK, BARBARA H" <bs7652@att.com>
Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 17:43
Para: 'JORDI PALET MARTINEZ' <jordi.palet@consulintel.es>, "v6ops@ietf.org =
list" <v6ops@ietf.org>
Asunto: RE: transition-ipv4aas-01: 464XLAT and NAT

    > From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
    > Hi Barbara,
    >=20
    > It is following section 6.3 of RFC6877 (464XLAT).
    >=20
    > It is true that RFC8273 is much more recent, and obviously it was not
    > considered, but in a quick consideration I think it is a very complex=
 scenario, if
    > you're using DHCPv6-PD to also use RFC8273 ...
    >=20
    > It may be possible, but I'm not completely sure if you are thinking i=
n some
    > specific scenario that I don't see right now?
   =20
    Section 6.3 of RFC 6877 is clearly requiring multiple /64 prefixes, whi=
ch RFC 8273 cannot deliver. But Section 6.3 is also making it clear that it=
 is really about *having* the multiple /64 prefixes (including a dedicated =
/64 for the translation), and not how the prefixes are acquired (though it =
does, unfortunately, include the phrase "When a dedicated /64 prefix is not=
 available for translation from DHCPv6-PD", it seems to me from the previou=
s sentences that the intent is for there to be a dedicated /64 and the auth=
ors weren't thinking about the possibility of other means for prefix acquis=
ition. It shouldn't matter how the prefixes are acquired. The current 464XL=
AT-1 suggests that it does matter how the prefix is acquired. The 464XLAT-1=
 language says if a dedicated prefix were acquired by manual provisioning o=
r some other future mechanism, that would not be sufficient to avoid NAT44.=
 Only a /64 acquired by IA_PD can avoid NAT44.=20
   =20
    That seems bizarre to me, so I'd really like someone to explain this be=
tter to me, why prefix acquisition method matters. Simply pointing to RFC 6=
877 is insufficient, because that provides no justification for why only ac=
quisition via IA_PD is acceptable. If method doesn't matter, then "using DH=
CPv6-PD [RFC3633] (IPv6 Prefix Options for DHCPv6)" should be deleted from =
the end of the requirement.=20
    Barbara
    =20
    > Regards,
    > Jordi
    >=20
    >=20
    >=20
    > =EF=BB=BF-----Mensaje original-----
    > De: "STARK, BARBARA H" <bs7652@att.com>
    > Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 16:44
    > Para: 'JORDI PALET MARTINEZ' <jordi.palet@consulintel.es>, "v6ops@iet=
f.org
    > list" <v6ops@ietf.org>
    > Asunto: transition-ipv4aas-01: 464XLAT and NAT
    >=20
    >     I see:
    >          464XLAT-1:  The IPv6 Transition CE Router MUST perform IPv4 =
Network
    >                    Address Translation (NAT) on IPv4 traffic translat=
ed
    >                    using the CLAT, unless a dedicated /64 prefix has =
been
    >                    acquired using DHCPv6-PD [RFC3633] (IPv6 Prefix Op=
tions
    >                    for DHCPv6).
    >     and am curious why the dedicated /64 prefix exclusion applies onl=
y to a
    > prefix acquired by IA_PD, and not one acquired by RFC 8273?
    >=20
    >=20
    >=20
    >=20
    > **********************************************
    > IPv4 is over
    > Are you ready for the new Internet ?
    > https://urldefense.proofpoint.com/v2/url?u=3Dhttp-
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    > s=3DFakBFjJ2Kjbgeua8eYDE6MaGnAShhoOn4DGWgXh7mAc&e=3D
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    >=20
    > This electronic message contains information which may be privileged =
or
    > confidential. The information is intended to be for the exclusive use=
 of the
    > individual(s) named above and further non-explicilty authorized discl=
osure,
    > copying, distribution or use of the contents of this information, eve=
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er to
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    >=20
    >=20
   =20
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "STARK, BARBARA H" <bs7652@att.com>, "v6ops@ietf.org list" <v6ops@ietf.org>
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Thread-Topic: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
References: <82CAB96F-B0FB-4E6F-A8FB-094C424F514F@consulintel.es> <CAHL_VyBb_R6A3C0gHL_vpfdfnNuqf-1Eq3vP8RwqhvZh205Xhg@mail.gmail.com> <4C35EB79-A494-459B-8854-6FB2BAB1FF6E@consulintel.es> <CAHL_VyCeC5XM=hA5UxqN_DjBWm_611cHJ05h_aXK+U9y2HOZpQ@mail.gmail.com> <2D09D61DDFA73D4C884805CC7865E6114DDD5013@GAALPA1MSGUSRBF.ITServices.sbc.com> <92BC2DC8-85D1-4757-8426-E07C88088DCF@consulintel.es> <2D09D61DDFA73D4C884805CC7865E6114DDD531A@GAALPA1MSGUSRBF.ITServices.sbc.com> <8CB5274B-4221-4692-A6B8-FEDA9ED0A43D@consulintel.es> <2D09D61DDFA73D4C884805CC7865E6114DDD551E@GAALPA1MSGUSRBF.ITServices.sbc.com>
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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    >     >    TRANS-2:  If 464XLAT [RFC6877] is
    >     >              supported, the IPv6 Transition CE Router MUST enable the
    >     >              CLAT (in order to automatically configure 464XLAT
    >     >              [RFC6877]).  If 464XLAT [RFC6877] is not supported, and
    >     >              more than one S46 mechanism is supported, following
    >     >              Section 1.4 of [RFC8026], MUST check for a valid match in
    >     >              OPTION_S46_PRIORITY, which will allow configuring any of
    >     >              the other transition mechanisms.
    > 
    >     I think the comingling of "supported" and "enabled" is problematic in this
    > requirement.
    >     "Supported" means (to most people) the same as "implemented". That is,
    > the code exists. "Enabled" means the supported code is actually running. Just
    > because 464XLAT is supported does not mean it is enabled. If 464XLAT is not
    > enabled, then it may not be a good idea to automatically enable CLAT. And,
    > likewise, the other mechanisms should only be configured if they are
    > enabled and not merely supported. I suggest changing all instances of
    > "supported" to "enabled" in this requirement.
    > 
    > -> That's why the requirement is, using other words: If 464XLAT is
    > implemented in this CE, enable it (by means of enabling the CLAT). I'm talking
    > here only in the CE, because the S46 doesn't include support for 464XLAT, so
    > we can't use it to check it ...
    
    Are you saying:
    (1) If 464XLAT is implemented, the default configuration MUST have CLAT enabled.
    (2) If 464XLAT is implemented, then CLAT MUST always be enabled and there MUST be no way to disable it.
    While I think (1) may be ok, I think (2) is an incredibly bad idea. As you describe it, the requirement reads more like (2) than (1).

-> Right now, is 2. Because we don't have an explicit way to check if 464XLAT is being used by the ISP by means of S46 (one possibility will be to update S46 to support 464XLAT), but we can make it this way:

TRANS-2:  If 464XLAT [RFC6877] is
supported, the IPv6 Transition CE Router MUST enable the
CLAT (in order to automatically configure 464XLAT
[RFC6877]), unless an alternative S46 mechanism is supported, 
and following
Section 1.4 of [RFC8026], MUST check for a valid match in
OPTION_S46_PRIORITY, which will allow configuring any of
the other transition mechanisms.

      
    >     I haven't gone through the entire document yet, but you may want to look
    > for other cases where you use "supported" where you really should use
    > "enabled". TRANS-1 is fine because it really is just talking about ensuring the
    > code exists (is implemented) on the device. You may also want to consider
    > requirements for conditions under which some of the supported features
    > are automatically enabled. For example, for 464XLAT, should PCP (if
    > implemented) be automatically enabled when 464XLAT is enabled? Or when
    > CLAT is enabled?
    > 
    > -> Will do, anyway, I can wait a few extra days if you will have time to do an
    > in-depth review of the document?
    
    I may not have time. I have to focus on other priorities for the next couple of weeks.
     
    >     We may also want to consider whether to recommend that a Transition CE
    > Router by default has all these mechanisms enabled. There should probably
    > also be a requirement that indicates it should be possible to enable/disable
    > any of these mechanisms. At this stage if the game, we need to be sure we
    > can defend against brokenness.
    > 
    > -> I think in the case of all the other transition, this can be done by means of
    > S46, but will review again this point, just in case something else need to be
    > suggested/amended. Of course, in general I expect the CEs to implement in
    > the CLI or GUI, or other management interfaces (as they do today) a way to
    > explicitly disable/enable a mechanism. Do you think we should have that as
    > an explicit requirement?

Clear, then will draft a requirement for this:
    
    Yes, it should be an explicit requirement. If the intent of an "enabled" statement is to have it enabled as default configuration, then the phrase "default configuration" needs to be used. In cases where there is a trigger that causes a function to become enabled, it needs to be clear what the trigger is. Mere presence of code (implementation) should never be such a trigger. But presence of code is reasonable as something that can impact default configuration.
     
    Barbara
    



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

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Color me wacko. I'm thinking about weird cases.

No hats.

Suppose I enable dual stack in a domain, and the router in question as a =
result turns off transition stuff. Then IPv6 connectivity fails.

Suppose the domain is IPv4-only, and native IPv6 gets turned on. Does =
the transition technology stop?

Let your mind spin for a while.

This seems like a problem that should be solved using routing. If I =
don't have a route to <somewhere> using native IPv6 but do using the =
transition technology, I have an argument for the transition technology. =
If the native route becomes available, I should think it would supersede =
the transition path.

Am I missing something?

> On Jun 6, 2018, at 5:25 AM, Richard Patterson <richard@helix.net.nz> =
wrote:
>=20
> Hi Jordi,
>=20
> I'm not sure that I agree with requirement TRANS-2:
> "The IPv6 Transition CE Router MUST verify if the WAN link supports
> native IPv4.  In that case, transition mechanisms SHOULD NOT be
> automatically enabled for that interface."
>=20
> In fact I'd suggest the exact opposite, if a CE Router receives valid
> S46 DHCP Options, it SHOULD suspend its DHCPv4/PPP IPCP operations
> until the WAN link status changes.  This could be expanded to include
> a validation of a working IPv4aaS, but unsure how that should look.
> For example, a brownfield IPv4aaS deployment is likely to still be
> running dual stack in parallel whilst it migrates its clients to
> IPv4aaS, the current wording would hinder this migration, by
> preferring to stay on native (or NAT444) IPv4.
>=20
> The "suspend" could also be debated, that it could be sufficient to
> rely on the DHCPv4 back off mechanisms, but on a large network that
> could still put a lot of extra load on the DHCPv4 server/relay and
> RADIUS.   My vote is to suspend temporarily until reboot/WAN change.
>=20
> And anecdotally, the current behaviour of OpenWRT is to prefer the S46
> IPv4aaS mechanism, even when presented a valid DHCPv4 lease.
>=20
> -Richard
> On Mon, 28 May 2018 at 10:11, JORDI PALET MARTINEZ
> <jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
>>=20
>> Hi Barbara,
>>=20
>> Sorry the late answer, last few weeks had been a non-stop traveling =
in 3 continents and too much work ...
>>=20
>> I see what you mean and we have discussed about this among the =
coauthors and amended the document, including some other comments =
received in the list.
>>=20
>> The new version has been published a few minutes ago:
>>=20
>> =
https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/?incl=
ude_text=3D1
>>=20
>> Basically, we are keeping a MUST for retail product versions, but not =
for specific ISP versions. I hope you agree with this, as we believe it =
makes sense.
>>=20
>> We don't update anymore the RFC7084, and we just use the same style =
to add the requirements for an IPv6 Transition CE Router (and we use =
this terminology across all the document).
>>=20
>> The main changes are summarized in the Annex C:
>> 1.  ID-Nits: IANA section.
>> 2.  ID-Nits: RFC7084 reference removed from Abstract.
>> 3.  This document no longer updates RFC7084.
>> 4.  UPnP section reworded.
>> 5.  "CE Router" changed to "IPv6 Transition CE Router".
>> 6.  Reduced text in Annex A.
>>=20
>> Hopefully everybody agrees now with this version, and in any case, =
will be very helpful if we can get any inputs.
>>=20
>> Regards,
>> Jordi
>>=20
>>=20
>>=20
>> =EF=BB=BF-----Mensaje original-----
>> De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBARA H" =
<bs7652@att.com>
>> Fecha: lunes, 30 de abril de 2018, 19:20
>> Para: V6 Ops List <v6ops@ietf.org>
>> Asunto: Re: [v6ops] I-D Action: =
draft-ietf-v6ops-transition-ipv4aas-00.txt
>>=20
>>    Hi Jordi,
>>    I was having a hard time understanding where you were headed with =
proposed changes, by following the email thread. So I was waiting for =
this update. My company's email server also refuses to deliver to me =
some emails sent to this list without telling me. That probably adds to =
my difficulty.
>>=20
>>    My suggestion related to making requirements "MUST" were tied to =
also *not* making this an update to RFC 7084.
>>=20
>>    Here is the problem:
>>    If this is an update to RFC 7084, then I cannot support any "MUST" =
statements.
>>    My employer makes use of RFC 7084. As is. Updating RFC 7084 with =
additional "MUST" statements impacts my employer's ability to use and =
reference RFC 7084 to get the CE routers it wants. An RFC 7084 update =
with "MUST" statements (that are not needed by many current deployments) =
would be harmful to the existing IPv6 ecosystem.
>>=20
>>    For a device profile to be usable by the vendor and ISP community, =
it must contain "MUST" statements for all items that need to be required =
to achieve the profile's goal. Trying to get vendors to implement lots =
of "SHOULD" statements is futile. As an individual contributor, I do not =
support IETF publishing a futile device profile document with many =
"SHOULD" statements.
>>=20
>>    The solution I have proposed is to create a brand new device =
profile. A device profile for something called an "IPv6 Transition CE =
Router". This device profile is not an update to RFC 7084. It is its own =
thing. It is free to make use of RFC 7084 any way it wants -- not at =
all, in whole, or by referencing sections it does or doesn't want to =
require as part of the "IPv6 Transition CE Router" device profile.
>>    Barbara
>>=20
>>    _______________________________________________
>>    v6ops mailing list
>>    v6ops@ietf.org
>>    https://www.ietf.org/mailman/listinfo/v6ops
>>=20
>>=20
>>=20
>>=20
>> **********************************************
>> IPv4 is over
>> Are you ready for the new Internet ?
>> http://www.consulintel.es
>> The IPv6 Company
>>=20
>> This electronic message contains information which may be privileged =
or confidential. The information is intended to be for the exclusive use =
of the individual(s) named above and further non-explicilty authorized =
disclosure, copying, distribution or use of the contents of this =
information, even if partially, including attached files, is strictly =
prohibited and will be considered a criminal offense. If you are not the =
intended recipient be aware that any disclosure, copying, distribution =
or use of the contents of this information, even if partially, including =
attached files, is strictly prohibited, will be considered a criminal =
offense, so you must reply to the original sender to inform about this =
communication and delete it.
>>=20
>>=20
>>=20
>> _______________________________________________
>> v6ops mailing list
>> v6ops@ietf.org
>> https://www.ietf.org/mailman/listinfo/v6ops
>=20
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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Date: Wed, 06 Jun 2018 19:20:54 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Fred Baker <fredbaker.ietf@gmail.com>, Richard Patterson <richard@helix.net.nz>
CC: "v6ops@ietf.org list" <v6ops@ietf.org>
Message-ID: <BD1B36A5-C2BB-45AF-9479-7880C8409318@consulintel.es>
Thread-Topic: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt
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Hi Fred,

Below in-line.

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: v6ops <v6ops-bounces@ietf.org> en nombre de Fred Baker <fredbaker.ietf@=
gmail.com>
Fecha: mi=C3=A9rcoles, 6 de junio de 2018, 19:02
Para: Richard Patterson <richard@helix.net.nz>, JORDI PALET MARTINEZ <jordi=
.palet=3D40consulintel.es@dmarc.ietf.org>
CC: "v6ops@ietf.org list" <v6ops@ietf.org>
Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-00.txt

    Color me wacko. I'm thinking about weird cases.
   =20
    No hats.
   =20
    Suppose I enable dual stack in a domain, and the router in question as =
a result turns off transition stuff. Then IPv6 connectivity fails.
   =20
    Suppose the domain is IPv4-only, and native IPv6 gets turned on. Does t=
he transition technology stop?
   =20
    Let your mind spin for a while.
   =20
    This seems like a problem that should be solved using routing. If I don=
't have a route to <somewhere> using native IPv6 but do using the transitio=
n technology, I have an argument for the transition technology. If the nati=
ve route becomes available, I should think it would supersede the transitio=
n path.

-> See the example from Barbara. You have dual-stack today. You want to sta=
rt moving "some" customers to IPv4aas. So, you will have "both" routings wo=
rking in that "region". That's why it looks like DHCP options are more sens=
ible in this case and "considering" that the future is IPv6-only (and IPv4a=
as is a temporary measure), the *preference* should be for the transition r=
oute instead of the native-one (if both of them are available).
   =20
    Am I missing something?
   =20
    > On Jun 6, 2018, at 5:25 AM, Richard Patterson <richard@helix.net.nz> =
wrote:
    >=20
    > Hi Jordi,
    >=20
    > I'm not sure that I agree with requirement TRANS-2:
    > "The IPv6 Transition CE Router MUST verify if the WAN link supports
    > native IPv4.  In that case, transition mechanisms SHOULD NOT be
    > automatically enabled for that interface."
    >=20
    > In fact I'd suggest the exact opposite, if a CE Router receives valid
    > S46 DHCP Options, it SHOULD suspend its DHCPv4/PPP IPCP operations
    > until the WAN link status changes.  This could be expanded to include
    > a validation of a working IPv4aaS, but unsure how that should look.
    > For example, a brownfield IPv4aaS deployment is likely to still be
    > running dual stack in parallel whilst it migrates its clients to
    > IPv4aaS, the current wording would hinder this migration, by
    > preferring to stay on native (or NAT444) IPv4.
    >=20
    > The "suspend" could also be debated, that it could be sufficient to
    > rely on the DHCPv4 back off mechanisms, but on a large network that
    > could still put a lot of extra load on the DHCPv4 server/relay and
    > RADIUS.   My vote is to suspend temporarily until reboot/WAN change.
    >=20
    > And anecdotally, the current behaviour of OpenWRT is to prefer the S4=
6
    > IPv4aaS mechanism, even when presented a valid DHCPv4 lease.
    >=20
    > -Richard
    > On Mon, 28 May 2018 at 10:11, JORDI PALET MARTINEZ
    > <jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
    >>=20
    >> Hi Barbara,
    >>=20
    >> Sorry the late answer, last few weeks had been a non-stop traveling =
in 3 continents and too much work ...
    >>=20
    >> I see what you mean and we have discussed about this among the coaut=
hors and amended the document, including some other comments received in th=
e list.
    >>=20
    >> The new version has been published a few minutes ago:
    >>=20
    >> https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas=
/?include_text=3D1
    >>=20
    >> Basically, we are keeping a MUST for retail product versions, but no=
t for specific ISP versions. I hope you agree with this, as we believe it m=
akes sense.
    >>=20
    >> We don't update anymore the RFC7084, and we just use the same style =
to add the requirements for an IPv6 Transition CE Router (and we use this t=
erminology across all the document).
    >>=20
    >> The main changes are summarized in the Annex C:
    >> 1.  ID-Nits: IANA section.
    >> 2.  ID-Nits: RFC7084 reference removed from Abstract.
    >> 3.  This document no longer updates RFC7084.
    >> 4.  UPnP section reworded.
    >> 5.  "CE Router" changed to "IPv6 Transition CE Router".
    >> 6.  Reduced text in Annex A.
    >>=20
    >> Hopefully everybody agrees now with this version, and in any case, w=
ill be very helpful if we can get any inputs.
    >>=20
    >> Regards,
    >> Jordi
    >>=20
    >>=20
    >>=20
    >> =EF=BB=BF-----Mensaje original-----
    >> De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBARA H" <=
bs7652@att.com>
    >> Fecha: lunes, 30 de abril de 2018, 19:20
    >> Para: V6 Ops List <v6ops@ietf.org>
    >> Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-=
00.txt
    >>=20
    >>    Hi Jordi,
    >>    I was having a hard time understanding where you were headed with=
 proposed changes, by following the email thread. So I was waiting for this=
 update. My company's email server also refuses to deliver to me some email=
s sent to this list without telling me. That probably adds to my difficulty=
.
    >>=20
    >>    My suggestion related to making requirements "MUST" were tied to =
also *not* making this an update to RFC 7084.
    >>=20
    >>    Here is the problem:
    >>    If this is an update to RFC 7084, then I cannot support any "MUST=
" statements.
    >>    My employer makes use of RFC 7084. As is. Updating RFC 7084 with =
additional "MUST" statements impacts my employer's ability to use and refer=
ence RFC 7084 to get the CE routers it wants. An RFC 7084 update with "MUST=
" statements (that are not needed by many current deployments) would be har=
mful to the existing IPv6 ecosystem.
    >>=20
    >>    For a device profile to be usable by the vendor and ISP community=
, it must contain "MUST" statements for all items that need to be required =
to achieve the profile's goal. Trying to get vendors to implement lots of "=
SHOULD" statements is futile. As an individual contributor, I do not suppor=
t IETF publishing a futile device profile document with many "SHOULD" state=
ments.
    >>=20
    >>    The solution I have proposed is to create a brand new device prof=
ile. A device profile for something called an "IPv6 Transition CE Router". =
This device profile is not an update to RFC 7084. It is its own thing. It i=
s free to make use of RFC 7084 any way it wants -- not at all, in whole, or=
 by referencing sections it does or doesn't want to require as part of the =
"IPv6 Transition CE Router" device profile.
    >>    Barbara
    >>=20
    >>    _______________________________________________
    >>    v6ops mailing list
    >>    v6ops@ietf.org
    >>    https://www.ietf.org/mailman/listinfo/v6ops
    >>=20
    >>=20
    >>=20
    >>=20
    >> **********************************************
    >> IPv4 is over
    >> Are you ready for the new Internet ?
    >> http://www.consulintel.es
    >> The IPv6 Company
    >>=20
    >> This electronic message contains information which may be privileged=
 or confidential. The information is intended to be for the exclusive use o=
f the individual(s) named above and further non-explicilty authorized discl=
osure, copying, distribution or use of the contents of this information, ev=
en if partially, including attached files, is strictly prohibited and will =
be considered a criminal offense. If you are not the intended recipient be =
aware that any disclosure, copying, distribution or use of the contents of =
this information, even if partially, including attached files, is strictly =
prohibited, will be considered a criminal offense, so you must reply to the=
 original sender to inform about this communication and delete it.
    >>=20
    >>=20
    >>=20
    >> _______________________________________________
    >> v6ops mailing list
    >> v6ops@ietf.org
    >> https://www.ietf.org/mailman/listinfo/v6ops
    >=20
    > _______________________________________________
    > v6ops mailing list
    > v6ops@ietf.org
    > https://www.ietf.org/mailman/listinfo/v6ops
   =20
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.




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From nobody Fri Jun  8 01:51:31 2018
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Date: Fri, 8 Jun 2018 10:51:20 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: "v6ops@ietf.org list" <v6ops@ietf.org>
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Subject: Re: [v6ops] [Int-area] Intro to draft-patterson-intarea-ipoe-health-00 / RFC7084 wan down implications
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Hi,

I'd like to bring attention to this draft. It's trying to solve a problem 
when using IPoE and when to consider WAN being down (RFC7084), if there is 
no physical link-down.

I had an idea to use the ND state of the RA sending router, if ND to that 
doesn't work for a certain amount of time (perhaps we can even use the 
existing ND state and just monitor it), and if that indicates that 
connectivity has been dead sufficiently long, kick down DHCP T1 timers and 
try to renew, and if that is not successful, expire DHCP PD completly and 
do everything RFC7084 says to do.

Thoughts?


-- 
Mikael Abrahamsson    email: swmike@swm.pp.se


From nobody Fri Jun  8 06:59:42 2018
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From: Lorenzo Colitti <lorenzo@google.com>
Date: Fri, 8 Jun 2018 22:59:24 +0900
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Subject: Re: [v6ops] [Int-area] Intro to draft-patterson-intarea-ipoe-health-00 / RFC7084 wan down implications
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--00000000000065c2ee056e21cfda
Content-Type: text/plain; charset="UTF-8"

NUD is not necessarily a good signal for this since by typically it is
quiet for quite a while (30s with no traffic), and then suddenly gets
impatient (if there is no response to at least one out of three packets 1
second apart, it declares a failure).

It makes a lot of sense for a host that can use upper-layer hints from TCP
or other transport-layer protocols, but not so much for a router.

On Fri, Jun 8, 2018 at 5:51 PM Mikael Abrahamsson <swmike@swm.pp.se> wrote:

>
> Hi,
>
> I'd like to bring attention to this draft. It's trying to solve a problem
> when using IPoE and when to consider WAN being down (RFC7084), if there is
> no physical link-down.
>
> I had an idea to use the ND state of the RA sending router, if ND to that
> doesn't work for a certain amount of time (perhaps we can even use the
> existing ND state and just monitor it), and if that indicates that
> connectivity has been dead sufficiently long, kick down DHCP T1 timers and
> try to renew, and if that is not successful, expire DHCP PD completly and
> do everything RFC7084 says to do.
>
> Thoughts?
>
>
> --
> Mikael Abrahamsson    email: swmike@swm.pp.se
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>

--00000000000065c2ee056e21cfda
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">NUD is not necessarily a good signal for this since by typ=
ically it is quiet for quite a while (30s with no traffic), and then sudden=
ly gets impatient (if there is no response to at least one out of three pac=
kets 1 second apart, it declares a failure).<div><br></div><div>It makes a =
lot of sense for a host that can use upper-layer hints from TCP or other tr=
ansport-layer protocols, but not so much for a router.</div></div><br><div =
class=3D"gmail_quote"><div dir=3D"ltr">On Fri, Jun 8, 2018 at 5:51 PM Mikae=
l Abrahamsson &lt;<a href=3D"mailto:swmike@swm.pp.se">swmike@swm.pp.se</a>&=
gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Hi,<br>
<br>
I&#39;d like to bring attention to this draft. It&#39;s trying to solve a p=
roblem <br>
when using IPoE and when to consider WAN being down (RFC7084), if there is =
<br>
no physical link-down.<br>
<br>
I had an idea to use the ND state of the RA sending router, if ND to that <=
br>
doesn&#39;t work for a certain amount of time (perhaps we can even use the =
<br>
existing ND state and just monitor it), and if that indicates that <br>
connectivity has been dead sufficiently long, kick down DHCP T1 timers and =
<br>
try to renew, and if that is not successful, expire DHCP PD completly and <=
br>
do everything RFC7084 says to do.<br>
<br>
Thoughts?<br>
<br>
<br>
-- <br>
Mikael Abrahamsson=C2=A0 =C2=A0 email: <a href=3D"mailto:swmike@swm.pp.se" =
target=3D"_blank">swmike@swm.pp.se</a><br>
<br>
_______________________________________________<br>
v6ops mailing list<br>
<a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6ops@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/v6ops</a><br>
</blockquote></div>

--00000000000065c2ee056e21cfda--


From nobody Fri Jun  8 07:05:40 2018
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From: Gert Doering <gert@space.net>
To: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>
Cc: Mikael Abrahamsson <swmike@swm.pp.se>, "v6ops@ietf.org WG" <v6ops@ietf.org>
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Subject: Re: [v6ops] [Int-area] Intro to draft-patterson-intarea-ipoe-health-00 / RFC7084 wan down implications
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Hi,

On Fri, Jun 08, 2018 at 10:59:24PM +0900, Lorenzo Colitti wrote:
> It makes a lot of sense for a host that can use upper-layer hints from TCP
> or other transport-layer protocols, but not so much for a router.

For a router, BFD seems to one of the few things that IETF seems to be
able to agree on.  Thus, implementations exist, and especially on the ISP
side, vendors actually implement this somewhere distributed nowadays...

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

SpaceNet AG                      Vorstand: Sebastian v. Bomhard, Michael Emmer
Joseph-Dollinger-Bogen 14        Aufsichtsratsvors.: A. Grundner-Culemann
D-80807 Muenchen                 HRB: 136055 (AG Muenchen)
Tel: +49 (0)89/32356-444         USt-IdNr.: DE813185279


From nobody Fri Jun  8 07:11:53 2018
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From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Gert Doering <gert@space.net>
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Subject: Re: [v6ops] [Int-area] Intro to draft-patterson-intarea-ipoe-health-00 / RFC7084 wan down implications
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On Fri, 8 Jun 2018, Gert Doering wrote:

> For a router, BFD seems to one of the few things that IETF seems to be 
> able to agree on.  Thus, implementations exist, and especially on the 
> ISP side, vendors actually implement this somewhere distributed 
> nowadays...

Are you aware of BFD implementations suited to be implemented on the HGW? 
I believe this is going to have to be run in echo mode without BFD needed 
to be supported on the ISP side.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se


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From: Richard Patterson <richard@helix.net.nz>
Date: Fri, 8 Jun 2018 15:14:29 +0100
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Subject: Re: [v6ops] [Int-area] Intro to draft-patterson-intarea-ipoe-health-00 / RFC7084 wan down implications
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On Fri, 8 Jun 2018 at 15:06, Gert Doering <gert@space.net> wrote:
> For a router, BFD seems to one of the few things that IETF seems to be
> able to agree on.  Thus, implementations exist, and especially on the ISP
> side, vendors actually implement this somewhere distributed nowadays...

Sadly it's not widely supported on consumer routers, and full BFD
would be quite heavy.

Broadband Forum's TR-146 actually already discusses this issue and
suggests the use of BFD echo.
In the next version of this draft will reference TR-146, as well as
prefer BFD echo as the health check mechanism if it's available.
The IPOE_HEALTH DHCP Option interval and limit parameters will
continue to be used, as will the behaviours defined once they're
reached.

-Richard


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From: Gert Doering <gert@space.net>
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Subject: Re: [v6ops] [Int-area] Intro to draft-patterson-intarea-ipoe-health-00 / RFC7084 wan down implications
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Hi,

On Fri, Jun 08, 2018 at 04:11:45PM +0200, Mikael Abrahamsson wrote:
> On Fri, 8 Jun 2018, Gert Doering wrote:
>=20
> > For a router, BFD seems to one of the few things that IETF seems to be=
=20
> > able to agree on.  Thus, implementations exist, and especially on the=
=20
> > ISP side, vendors actually implement this somewhere distributed=20
> > nowadays...
>=20
> Are you aware of BFD implementations suited to be implemented on the HGW?=
=20
> I believe this is going to have to be run in echo mode without BFD needed=
=20
> to be supported on the ISP side.

I haven't yet run any of this, but Google turned up a few hits

 https://github.com/dyninc/OpenBFDD
  "an open source implemnentation of the BFD protocol"

 https://github.com/thehajime/kbfd
  "ancient Linux BFD (...) implementation"
  [as a linux kernel module, plus a zebra/quagga patch to tap into
   kBFD for, BFD control and reporting]

 https://docs.cumulusnetworks.com/display/CL35/Bidirectional+Forwarding+Det=
ection+-+BFD
  (only echo mode, page talks about FRRouting, frrouting.org does not=20
   mention BFD though)

 BIRD seems to have a BFD module


so - not sure if any of these are suitable for a memory- and CPU-starved
CPE, but "BFD the protocol" isn't hard, the tricky bit would be "hook=20
into the state signalling logic of your router firmware"...

Gert Doering
        -- NetMaster
--=20
have you enabled IPv6 on something today...?

SpaceNet AG                      Vorstand: Sebastian v. Bomhard, Michael Em=
mer
Joseph-Dollinger-Bogen 14        Aufsichtsratsvors.: A. Grundner-Culemann
D-80807 Muenchen                 HRB: 136055 (AG Muenchen)
Tel: +49 (0)89/32356-444         USt-IdNr.: DE813185279

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From: Fred Baker <fredbaker.ietf@gmail.com>
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Subject: [v6ops] IETF 102 Agenda
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Permit me to comment on the IETF 102 agenda as it appears to be shaping =
up.

We have
 - an invited talk by George Michaelson of APNIC, who has been looking =
at IPv6 traffic in world economies
   (You might find the observations surprising; hint, guess which =
economy has the most IPv6 traffic? Which markets?)
 - draft-ietf-v6ops-transition-ipv4aas
 - draft-ietf-v6ops-ipv6rtr-reqs

draft-ietf-v6ops-conditional-ras is under discussion in the IESG, and is =
waiting for draft-ietf-rtgwg-enterprise-pa-multihoming before =
proceeding. We have several other individual contributions, and have =
discussed most of them on the list since IETF 101. The chairs don't see =
a supporting interest level in them at this time.

We have two slots, two hours each, at IETF 102. The chairs are right now =
contemplating using one a slot for those three topics and perhaps a set =
of lightning talks, and letting the second slot go.

To change that, we need to see new drafts (e.g., new content) and =
supporting list traffic.

Your turn...

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    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <title>IETF Working Group Agenda Analysis</title>
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  <body>
    <h3>IESG: Waiting for Writeup</h3>
    <ul>
      <li>2018-05-21	draft-ietf-v6ops-conditional-ras  <a href="https://datatracker.ietf.org/doc/draft-ietf-v6ops-conditional-ras">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-ietf-v6ops-conditional-ras">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-ietf-v6ops-conditional-ras-04.txt">(diffs)</a></li>
    </ul>

    <h3>WG: Updated WG Document</h3>
    <ul>
      <li>2018-05-28	draft-ietf-v6ops-transition-ipv4aas  <a href="https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-ietf-v6ops-transition-ipv4aas-01.txt">(diffs)</a></li>
      <li>2018-05-26	draft-ietf-v6ops-ipv6rtr-reqs  <a href="https://datatracker.ietf.org/doc/draft-ietf-v6ops-ipv6rtr-reqs">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-ietf-v6ops-ipv6rtr-reqs">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-ietf-v6ops-ipv6rtr-reqs-04.txt">(diffs)</a></li>
    </ul>

    <h3>Individual Submission: Updated </h3>
    <ul>
      <li>2018-06-05	draft-fioccola-v6ops-ipv6-alt-mark  <a href="https://datatracker.ietf.org/doc/draft-fioccola-v6ops-ipv6-alt-mark">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-fioccola-v6ops-ipv6-alt-mark">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-fioccola-v6ops-ipv6-alt-mark-01.txt">(diffs)</a></li>
      <li>2018-05-29	draft-palet-v6ops-nat64-deployment  <a href="https://datatracker.ietf.org/doc/draft-palet-v6ops-nat64-deployment">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-palet-v6ops-nat64-deployment">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-palet-v6ops-nat64-deployment-01.txt">(diffs)</a></li>
      <li>2018-05-29	draft-palet-v6ops-p2p-links  <a href="https://datatracker.ietf.org/doc/draft-palet-v6ops-p2p-links">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-palet-v6ops-p2p-links">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-palet-v6ops-p2p-links-02.txt">(diffs)</a></li>
      <li>2018-05-29	draft-templin-v6ops-pdhost  <a href="https://datatracker.ietf.org/doc/draft-templin-v6ops-pdhost">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-templin-v6ops-pdhost">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-templin-v6ops-pdhost-20.txt">(diffs)</a></li>
      <li>2018-04-18	draft-shytyi-v6ops-danir  <a href="https://datatracker.ietf.org/doc/draft-shytyi-v6ops-danir">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-shytyi-v6ops-danir">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-shytyi-v6ops-danir-01.txt">(diffs)</a></li>
    </ul>

    <p>Fri Jun  8 10:36:42 2018</p>
  </body>
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From nobody Sat Jun  9 04:58:25 2018
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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
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Thread-Topic: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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H=EF=BB=BFi all,

As a result of this week email exchange with Barbara, she mention about the=
 need to make sure, that any transition mechanism is enabled or not by the =
CE, depending on the operator wish, which I agree.

It seems to me that the best way for doing so is by ensuring that RFC8026 i=
s used, so the S46 DHCPv6 option tells the CE what mechanisms (if any) that=
 the operator supports, and we have already text to say that in the documen=
t. However, this option today only supports DS-Lite, lw4o6 and MAP-E/T.

So, my question to the WG (and the chairs):

It is possible (and the WG agree on that), to update RFC8026 (by means of a=
 short "Update of RFC8026 for 464XLAT Support" section in draft-ietf-v6ops-=
transition-ipv4aas) and instruct IANA to add a new code for 464XLAT?=20

I think this will be the cleaner and simpler way to do this.

A more complex alternative will be to "force" the CE to actually "test" for=
 available NSP/WKP for the NAT64, using RFC7050 and RFC7225 if PCP is being=
 used.

Regards,
Jordi
=20
=20



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From: Fred Baker <fredbaker.ietf@gmail.com>
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To: JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org>
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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You might take a look at https://github.com/LACNIC/natmeter for ideas.

> On Jun 9, 2018, at 4:58 AM, JORDI PALET MARTINEZ =
<jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
>=20
> H=EF=BB=BFi all,
>=20
> As a result of this week email exchange with Barbara, she mention =
about the need to make sure, that any transition mechanism is enabled or =
not by the CE, depending on the operator wish, which I agree.
>=20
> It seems to me that the best way for doing so is by ensuring that =
RFC8026 is used, so the S46 DHCPv6 option tells the CE what mechanisms =
(if any) that the operator supports, and we have already text to say =
that in the document. However, this option today only supports DS-Lite, =
lw4o6 and MAP-E/T.
>=20
> So, my question to the WG (and the chairs):
>=20
> It is possible (and the WG agree on that), to update RFC8026 (by means =
of a short "Update of RFC8026 for 464XLAT Support" section in =
draft-ietf-v6ops-transition-ipv4aas) and instruct IANA to add a new code =
for 464XLAT?
>=20
> I think this will be the cleaner and simpler way to do this.
>=20
> A more complex alternative will be to "force" the CE to actually =
"test" for available NSP/WKP for the NAT64, using RFC7050 and RFC7225 if =
PCP is being used.
>=20
> Regards,
> Jordi
>=20
>=20
>=20
>=20
>=20
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>=20
> This electronic message contains information which may be privileged =
or confidential. The information is intended to be for the exclusive use =
of the individual(s) named above and further non-explicilty authorized =
disclosure, copying, distribution or use of the contents of this =
information, even if partially, including attached files, is strictly =
prohibited and will be considered a criminal offense. If you are not the =
intended recipient be aware that any disclosure, copying, distribution =
or use of the contents of this information, even if partially, including =
attached files, is strictly prohibited, will be considered a criminal =
offense, so you must reply to the original sender to inform about this =
communication and delete it.
>=20
>=20
>=20
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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From nobody Sat Jun  9 14:58:18 2018
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From: Fred Baker <fredbaker.ietf@gmail.com>
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Subject: [v6ops] draft-patterson-intarea-ipoe-health
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Looking for comments on draft-patterson-intarea-ipoe-health-00. The authors w=
ould like to discuss it in v6ops at IETF 102 (Montreal). Do folks find it in=
teresting/useful?

The primary working group for this will be intarea, for reasons related to t=
he charter. However, it would be useful to know that the problem is a genera=
l one, and get comments on the proposed solution.

Sent from my iPad=


From nobody Sat Jun  9 20:40:21 2018
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From: Fred Baker <fredbaker.ietf@gmail.com>
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To: JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org>
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/uAhApj7zU7WsWf3szGRmYGoja8k>
Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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I would ask one question. When the operator is using this in a managed servi=
ce, of course the operator should be in control of it. Are we precluding usi=
ng the CE in other than a managed service? I should think that in cases in w=
hich it is *not* a managed service, the owner of the CE would be in control
If it.

Sent using a machine that autocorrects in interesting ways...

> On Jun 9, 2018, at 4:58 AM, JORDI PALET MARTINEZ <jordi.palet=3D40consulin=
tel.es@dmarc.ietf.org> wrote:
>=20
> H=EF=BB=BFi all,
>=20
> As a result of this week email exchange with Barbara, she mention about th=
e need to make sure, that any transition mechanism is enabled or not by the C=
E, depending on the operator wish, which I agree.
>=20
> It seems to me that the best way for doing so is by ensuring that RFC8026 i=
s used, so the S46 DHCPv6 option tells the CE what mechanisms (if any) that t=
he operator supports, and we have already text to say that in the document. H=
owever, this option today only supports DS-Lite, lw4o6 and MAP-E/T.
>=20
> So, my question to the WG (and the chairs):
>=20
> It is possible (and the WG agree on that), to update RFC8026 (by means of a=
 short "Update of RFC8026 for 464XLAT Support" section in draft-ietf-v6ops-t=
ransition-ipv4aas) and instruct IANA to add a new code for 464XLAT?=20
>=20
> I think this will be the cleaner and simpler way to do this.
>=20
> A more complex alternative will be to "force" the CE to actually "test" fo=
r available NSP/WKP for the NAT64, using RFC7050 and RFC7225 if PCP is being=
 used.
>=20
> Regards,
> Jordi
>=20
>=20
>=20
>=20
>=20
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>=20
> This electronic message contains information which may be privileged or co=
nfidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, c=
opying, distribution or use of the contents of this information, even if par=
tially, including attached files, is strictly prohibited and will be conside=
red a criminal offense. If you are not the intended recipient be aware that a=
ny disclosure, copying, distribution or use of the contents of this informat=
ion, even if partially, including attached files, is strictly prohibited, wi=
ll be considered a criminal offense, so you must reply to the original sende=
r to inform about this communication and delete it.
>=20
>=20
>=20
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


From nobody Sun Jun 10 01:23:22 2018
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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "v6ops@ietf.org list" <v6ops@ietf.org>
Message-ID: <39872B3E-3278-48A0-AEA0-E9CE0F6FA52D@consulintel.es>
Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <17DE59FD-882F-499B-9BDE-DD59D28BC00F@gmail.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/Jv3sVnkoQG3rxNtJDdw1QW_BxxY>
Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Yeah, I know this. Alejandro, from LACNIC is measuring NAT44 and NAT66. Pro=
bably it could be adapted to detect NAT64, but I want to make it much simpl=
er, and there is one more detail I've not mention in my email ...

We may have an ISP having NAT64, but NOT wanting some customers to use it (=
at least not by default), so with a DHCP option we facilitate that, as you =
may have different DHCP options for different customers.

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: v6ops <v6ops-bounces@ietf.org> en nombre de Fred Baker <fredbaker.ietf@=
gmail.com>
Fecha: s=C3=A1bado, 9 de junio de 2018, 17:24
Para: JORDI PALET MARTINEZ <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
CC: "v6ops@ietf.org list" <v6ops@ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

    You might take a look at https://github.com/LACNIC/natmeter for ideas.
   =20
    > On Jun 9, 2018, at 4:58 AM, JORDI PALET MARTINEZ <jordi.palet=3D40con=
sulintel.es@dmarc.ietf.org> wrote:
    >=20
    > H=EF=BB=BFi all,
    >=20
    > As a result of this week email exchange with Barbara, she mention abo=
ut the need to make sure, that any transition mechanism is enabled or not b=
y the CE, depending on the operator wish, which I agree.
    >=20
    > It seems to me that the best way for doing so is by ensuring that RFC=
8026 is used, so the S46 DHCPv6 option tells the CE what mechanisms (if any=
) that the operator supports, and we have already text to say that in the d=
ocument. However, this option today only supports DS-Lite, lw4o6 and MAP-E/=
T.
    >=20
    > So, my question to the WG (and the chairs):
    >=20
    > It is possible (and the WG agree on that), to update RFC8026 (by mean=
s of a short "Update of RFC8026 for 464XLAT Support" section in draft-ietf-=
v6ops-transition-ipv4aas) and instruct IANA to add a new code for 464XLAT?
    >=20
    > I think this will be the cleaner and simpler way to do this.
    >=20
    > A more complex alternative will be to "force" the CE to actually "tes=
t" for available NSP/WKP for the NAT64, using RFC7050 and RFC7225 if PCP is=
 being used.
    >=20
    > Regards,
    > Jordi
    >=20
    >=20
    >=20
    >=20
    >=20
    > **********************************************
    > IPv4 is over
    > Are you ready for the new Internet ?
    > http://www.consulintel.es
    > The IPv6 Company
    >=20
    > This electronic message contains information which may be privileged =
or confidential. The information is intended to be for the exclusive use of=
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his information, even if partially, including attached files, is strictly p=
rohibited, will be considered a criminal offense, so you must reply to the =
original sender to inform about this communication and delete it.
    >=20
    >=20
    >=20
    > _______________________________________________
    > v6ops mailing list
    > v6ops@ietf.org
    > https://www.ietf.org/mailman/listinfo/v6ops
   =20
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
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The IPv6 Company

This electronic message contains information which may be privileged or con=
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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "v6ops@ietf.org list" <v6ops@ietf.org>
Message-ID: <DDA5DDD2-D421-4545-8FED-B11523CB6283@consulintel.es>
Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com>
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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You're right, and that's why we also will include a new requirement (this w=
as also part of the email exchange with Barbara), in order to make sure tha=
t is possible to turn on/off the mechanisms with a GUI or CLI, whatever is =
available.

This is already today an option with most of the CEs in the market for othe=
r transition mechanisms, and this was not part of RFC7084, but here it is m=
uch better we make it explicit.

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: v6ops <v6ops-bounces@ietf.org> en nombre de Fred Baker <fredbaker.ietf@=
gmail.com>
Fecha: domingo, 10 de junio de 2018, 5:40
Para: JORDI PALET MARTINEZ <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
CC: "v6ops@ietf.org list" <v6ops@ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

    I would ask one question. When the operator is using this in a managed =
service, of course the operator should be in control of it. Are we precludi=
ng using the CE in other than a managed service? I should think that in cas=
es in which it is *not* a managed service, the owner of the CE would be in =
control
    If it.
   =20
    Sent using a machine that autocorrects in interesting ways...
   =20
    > On Jun 9, 2018, at 4:58 AM, JORDI PALET MARTINEZ <jordi.palet=3D40con=
sulintel.es@dmarc.ietf.org> wrote:
    >=20
    > H=EF=BB=BFi all,
    >=20
    > As a result of this week email exchange with Barbara, she mention abo=
ut the need to make sure, that any transition mechanism is enabled or not b=
y the CE, depending on the operator wish, which I agree.
    >=20
    > It seems to me that the best way for doing so is by ensuring that RFC=
8026 is used, so the S46 DHCPv6 option tells the CE what mechanisms (if any=
) that the operator supports, and we have already text to say that in the d=
ocument. However, this option today only supports DS-Lite, lw4o6 and MAP-E/=
T.
    >=20
    > So, my question to the WG (and the chairs):
    >=20
    > It is possible (and the WG agree on that), to update RFC8026 (by mean=
s of a short "Update of RFC8026 for 464XLAT Support" section in draft-ietf-=
v6ops-transition-ipv4aas) and instruct IANA to add a new code for 464XLAT?=
=20
    >=20
    > I think this will be the cleaner and simpler way to do this.
    >=20
    > A more complex alternative will be to "force" the CE to actually "tes=
t" for available NSP/WKP for the NAT64, using RFC7050 and RFC7225 if PCP is=
 being used.
    >=20
    > Regards,
    > Jordi
    >=20
    >=20
    >=20
    >=20
    >=20
    > **********************************************
    > IPv4 is over
    > Are you ready for the new Internet ?
    > http://www.consulintel.es
    > The IPv6 Company
    >=20
    > This electronic message contains information which may be privileged =
or confidential. The information is intended to be for the exclusive use of=
 the individual(s) named above and further non-explicilty authorized disclo=
sure, copying, distribution or use of the contents of this information, eve=
n if partially, including attached files, is strictly prohibited and will b=
e considered a criminal offense. If you are not the intended recipient be a=
ware that any disclosure, copying, distribution or use of the contents of t=
his information, even if partially, including attached files, is strictly p=
rohibited, will be considered a criminal offense, so you must reply to the =
original sender to inform about this communication and delete it.
    >=20
    >=20
    >=20
    > _______________________________________________
    > v6ops mailing list
    > v6ops@ietf.org
    > https://www.ietf.org/mailman/listinfo/v6ops
   =20
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.




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From: Richard Patterson <richard@helix.net.nz>
Date: Sun, 10 Jun 2018 09:45:27 +0100
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To: "v6ops@ietf.org list" <v6ops@ietf.org>
Cc: jordi.palet=40consulintel.es@dmarc.ietf.org,  Fred Baker <fredbaker.ietf@gmail.com>
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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There are regulated markets that require providers to allow for BYO
devices.  Whilst BYO CE on an IPv4aaS network is probably a grey area,
DHCP signalling would allow for a non-managed CE that supports the
transition method to work without manual user configuration.

I'm for this approach, to bring 464XLAT inline with the other methods.

-Richard
On Sun, 10 Jun 2018 at 04:40, Fred Baker <fredbaker.ietf@gmail.com> wrote:
>
> I would ask one question. When the operator is using this in a managed se=
rvice, of course the operator should be in control of it. Are we precluding=
 using the CE in other than a managed service? I should think that in cases=
 in which it is *not* a managed service, the owner of the CE would be in co=
ntrol
> If it.
>
> Sent using a machine that autocorrects in interesting ways...
>
> > On Jun 9, 2018, at 4:58 AM, JORDI PALET MARTINEZ <jordi.palet=3D40consu=
lintel.es@dmarc.ietf.org> wrote:
> >
> > H=EF=BB=BFi all,
> >
> > As a result of this week email exchange with Barbara, she mention about=
 the need to make sure, that any transition mechanism is enabled or not by =
the CE, depending on the operator wish, which I agree.
> >
> > It seems to me that the best way for doing so is by ensuring that RFC80=
26 is used, so the S46 DHCPv6 option tells the CE what mechanisms (if any) =
that the operator supports, and we have already text to say that in the doc=
ument. However, this option today only supports DS-Lite, lw4o6 and MAP-E/T.
> >
> > So, my question to the WG (and the chairs):
> >
> > It is possible (and the WG agree on that), to update RFC8026 (by means =
of a short "Update of RFC8026 for 464XLAT Support" section in draft-ietf-v6=
ops-transition-ipv4aas) and instruct IANA to add a new code for 464XLAT?
> >
> > I think this will be the cleaner and simpler way to do this.
> >
> > A more complex alternative will be to "force" the CE to actually "test"=
 for available NSP/WKP for the NAT64, using RFC7050 and RFC7225 if PCP is b=
eing used.
> >
> > Regards,
> > Jordi
> >
> >
> >
> >
> >
> > **********************************************
> > IPv4 is over
> > Are you ready for the new Internet ?
> > http://www.consulintel.es
> > The IPv6 Company
> >
> > This electronic message contains information which may be privileged or=
 confidential. The information is intended to be for the exclusive use of t=
he individual(s) named above and further non-explicilty authorized disclosu=
re, copying, distribution or use of the contents of this information, even =
if partially, including attached files, is strictly prohibited and will be =
considered a criminal offense. If you are not the intended recipient be awa=
re that any disclosure, copying, distribution or use of the contents of thi=
s information, even if partially, including attached files, is strictly pro=
hibited, will be considered a criminal offense, so you must reply to the or=
iginal sender to inform about this communication and delete it.
> >
> >
> >
> > _______________________________________________
> > v6ops mailing list
> > v6ops@ietf.org
> > https://www.ietf.org/mailman/listinfo/v6ops
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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Date: Sun, 10 Jun 2018 11:02:52 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Richard Patterson <richard@helix.net.nz>, "v6ops@ietf.org list" <v6ops@ietf.org>
Message-ID: <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es>
Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Thanks Richard, I'm guessing nobody will be against this, but I needed to a=
sk, as this work is a WG item.

Just to clarify my (procedural) question to the chairs or even AD. Long exp=
lanation, but the question deserves it.

RFC8026, unless I recall it incorrectly, was developed in softwires WG and =
of course, being DHCPv6 options, was reviewed in DHCPv6 WG. The "long" titl=
e of the document mention "softwire" because the actual options are mechani=
sms developed within softwires WG (while 464XLAT was not).

There are several mentions of softwires in the document, but my reading is =
that the "softwire" word across the document is only "descriptive" not "pre=
scriptive".

I mean that the S46 priority option could be also used for something with i=
s not "softwires". In fact, there is also an option (DHCPv4 over DHCPv6) wh=
ich was developed within DHCPv6 WG and if you look into that document (RFC7=
341), it has no a single mention of "softwire" ...

In other words. We could make an RFC8026-bis to:
1) Remove the mention of softwires and make it more generic for transition =
DHCPv6 options
2) Add an option to support 464XLAT (and may be others)

However, that may be a much slower path, and may be conflictive, because if=
 the work was done in Softwire WG, they may not like that now the document =
is not used "only" for Softwires ...

So, the alternative I'm asking is, from a procedural point of view:
Can v6ops WG, just include an update in draft-ietf-v6ops-transition-ipv4aas=
 to add the option code for 464XLAT?

I guess also Med and Ian, the original authors, may want to say something. =
Clearly my intent is not to "break" in any way the actual document (on the =
contrary, we are extending the usage and I guess this may be done by future=
 documents as well) and I don't think what I'm suggesting does it.

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: v6ops <v6ops-bounces@ietf.org> en nombre de Richard Patterson <richard@=
helix.net.nz>
Fecha: domingo, 10 de junio de 2018, 10:46
Para: "v6ops@ietf.org list" <v6ops@ietf.org>
CC: <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

    There are regulated markets that require providers to allow for BYO
    devices.  Whilst BYO CE on an IPv4aaS network is probably a grey area,
    DHCP signalling would allow for a non-managed CE that supports the
    transition method to work without manual user configuration.
   =20
    I'm for this approach, to bring 464XLAT inline with the other methods.
   =20
    -Richard
    On Sun, 10 Jun 2018 at 04:40, Fred Baker <fredbaker.ietf@gmail.com> wro=
te:
    >
    > I would ask one question. When the operator is using this in a manage=
d service, of course the operator should be in control of it. Are we preclu=
ding using the CE in other than a managed service? I should think that in c=
ases in which it is *not* a managed service, the owner of the CE would be i=
n control
    > If it.
    >
    > Sent using a machine that autocorrects in interesting ways...
    >
    > > On Jun 9, 2018, at 4:58 AM, JORDI PALET MARTINEZ <jordi.palet=3D40c=
onsulintel.es@dmarc.ietf.org> wrote:
    > >
    > > H=EF=BB=BFi all,
    > >
    > > As a result of this week email exchange with Barbara, she mention a=
bout the need to make sure, that any transition mechanism is enabled or not=
 by the CE, depending on the operator wish, which I agree.
    > >
    > > It seems to me that the best way for doing so is by ensuring that R=
FC8026 is used, so the S46 DHCPv6 option tells the CE what mechanisms (if a=
ny) that the operator supports, and we have already text to say that in the=
 document. However, this option today only supports DS-Lite, lw4o6 and MAP-=
E/T.
    > >
    > > So, my question to the WG (and the chairs):
    > >
    > > It is possible (and the WG agree on that), to update RFC8026 (by me=
ans of a short "Update of RFC8026 for 464XLAT Support" section in draft-iet=
f-v6ops-transition-ipv4aas) and instruct IANA to add a new code for 464XLAT=
?
    > >
    > > I think this will be the cleaner and simpler way to do this.
    > >
    > > A more complex alternative will be to "force" the CE to actually "t=
est" for available NSP/WKP for the NAT64, using RFC7050 and RFC7225 if PCP =
is being used.
    > >
    > > Regards,
    > > Jordi
    > >
    > >
    > >
    > >
    > >
    > > **********************************************
    > > IPv4 is over
    > > Are you ready for the new Internet ?
    > > http://www.consulintel.es
    > > The IPv6 Company
    > >
    > > This electronic message contains information which may be privilege=
d or confidential. The information is intended to be for the exclusive use =
of the individual(s) named above and further non-explicilty authorized disc=
losure, copying, distribution or use of the contents of this information, e=
ven if partially, including attached files, is strictly prohibited and will=
 be considered a criminal offense. If you are not the intended recipient be=
 aware that any disclosure, copying, distribution or use of the contents of=
 this information, even if partially, including attached files, is strictly=
 prohibited, will be considered a criminal offense, so you must reply to th=
e original sender to inform about this communication and delete it.
    > >
    > >
    > >
    > > _______________________________________________
    > > v6ops mailing list
    > > v6ops@ietf.org
    > > https://www.ietf.org/mailman/listinfo/v6ops
    >
    > _______________________________________________
    > v6ops mailing list
    > v6ops@ietf.org
    > https://www.ietf.org/mailman/listinfo/v6ops
   =20
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.




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Date: Sun, 10 Jun 2018 20:16:18 +0900
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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On Sun, Jun 10, 2018 at 6:03 PM JORDI PALET MARTINEZ <jordi.palet=
40consulintel.es@dmarc.ietf.org> wrote:

> So, the alternative I'm asking is, from a procedural point of view:
> Can v6ops WG, just include an update in
> draft-ietf-v6ops-transition-ipv4aas to add the option code for 464XLAT?
>

ISTR that the last time this was discussed in v6ops there was substantial
opposition to a DHCPv6 option for 464xlat.

To be honest, as a wireline ISP I don't see why you'd want to do 464xlat at
all. It's pretty much the worst of all the IPv4-over-IPv6 mechanisms. Its
only advantage is that it's easy to deploy on mobile networks.

If you do want to do 464xlat, it's much better to do discovery using RFC
7050. That way, hosts behind the CPE can discover the NAT64 by themselves,
and do smart things like AAAA synthesis and DNSSEC, and also provide input
to their happy eyeballs mechanisms that IPv4 is not native and thus may be
less reliable.

--000000000000e9bbe5056e47c351
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">On Sun, Jun 10=
, 2018 at 6:03 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:=
40consulintel.es@dmarc.ietf.org" target=3D"_blank">40consulintel.es@dmarc.i=
etf.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"=
margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">So, the alte=
rnative I&#39;m asking is, from a procedural point of view:<br>
Can v6ops WG, just include an update in draft-ietf-v6ops-transition-ipv4aas=
 to add the option code for 464XLAT?<br></blockquote><div><br></div><div>IS=
TR that the last time this was discussed in v6ops there was substantial opp=
osition to a DHCPv6 option for 464xlat.</div><div><br></div><div>To be hone=
st, as a wireline ISP I don&#39;t see why you&#39;d want to do 464xlat at a=
ll. It&#39;s pretty much the worst of all the IPv4-over-IPv6 mechanisms. It=
s only advantage is that it&#39;s easy to deploy on mobile networks.</div><=
div><br></div><div>If you do want to do 464xlat, it&#39;s much better to do=
 discovery using RFC 7050. That way, hosts behind the CPE can discover the =
NAT64 by themselves, and do smart things like AAAA synthesis and DNSSEC, an=
d also provide input to their happy eyeballs mechanisms that IPv4 is not na=
tive and thus may be less reliable.</div></div></div>

--000000000000e9bbe5056e47c351--


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From: Alejandro Acosta <alejandroacostaalamo@gmail.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/JNBLL8l-dQvqyX1i3En_LSdzSbc>
Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Hello,

  Thanks for bringing the Natmeter project up.

  You are right, we not measuring -yet- DNS64..., thanks for the idea,
hope we come up with a clue in how to do this :-)..., just added to our
radar. As a final comment we do have few more things about 1) CGN and 2)
detecting prefix 192.0.0.0/29 on the client. 

  Willing to share the info.


Alejandro,




El 10/6/18 a las 04:23, JORDI PALET MARTINEZ escribió:
> Yeah, I know this. Alejandro, from LACNIC is measuring NAT44 and NAT66. Probably it could be adapted to detect NAT64, but I want to make it much simpler, and there is one more detail I've not mention in my email ...
>
> We may have an ISP having NAT64, but NOT wanting some customers to use it (at least not by default), so with a DHCP option we facilitate that, as you may have different DHCP options for different customers.
>
> Regards,
> Jordi
>  
>  
>
> ﻿-----Mensaje original-----
> De: v6ops <v6ops-bounces@ietf.org> en nombre de Fred Baker <fredbaker.ietf@gmail.com>
> Fecha: sábado, 9 de junio de 2018, 17:24
> Para: JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org>
> CC: "v6ops@ietf.org list" <v6ops@ietf.org>
> Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
>
>     You might take a look at https://github.com/LACNIC/natmeter for ideas.
>     
>     > On Jun 9, 2018, at 4:58 AM, JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org> wrote:
>     > 
>     > H﻿i all,
>     > 
>     > As a result of this week email exchange with Barbara, she mention about the need to make sure, that any transition mechanism is enabled or not by the CE, depending on the operator wish, which I agree.
>     > 
>     > It seems to me that the best way for doing so is by ensuring that RFC8026 is used, so the S46 DHCPv6 option tells the CE what mechanisms (if any) that the operator supports, and we have already text to say that in the document. However, this option today only supports DS-Lite, lw4o6 and MAP-E/T.
>     > 
>     > So, my question to the WG (and the chairs):
>     > 
>     > It is possible (and the WG agree on that), to update RFC8026 (by means of a short "Update of RFC8026 for 464XLAT Support" section in draft-ietf-v6ops-transition-ipv4aas) and instruct IANA to add a new code for 464XLAT?
>     > 
>     > I think this will be the cleaner and simpler way to do this.
>     > 
>     > A more complex alternative will be to "force" the CE to actually "test" for available NSP/WKP for the NAT64, using RFC7050 and RFC7225 if PCP is being used.
>     > 
>     > Regards,
>     > Jordi
>     > 
>     > 
>     > 
>     > 
>     > 
>     > **********************************************
>     > IPv4 is over
>     > Are you ready for the new Internet ?
>     > http://www.consulintel.es
>     > The IPv6 Company
>     > 
>     > This electronic message contains information which may be privileged or confidential. The information is intended to be for the exclusive use of the individual(s) named above and further non-explicilty authorized disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited and will be considered a criminal offense. If you are not the intended recipient be aware that any disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited, will be considered a criminal offense, so you must reply to the original sender to inform about this communication and delete it.
>     > 
>     > 
>     > 
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>     > v6ops@ietf.org
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>
>
>
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> This electronic message contains information which may be privileged or confidential. The information is intended to be for the exclusive use of the individual(s) named above and further non-explicilty authorized disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited and will be considered a criminal offense. If you are not the intended recipient be aware that any disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited, will be considered a criminal offense, so you must reply to the original sender to inform about this communication and delete it.
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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
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Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Hi Lorenzo,

=20

There are now many ISPs that have 464XLAT in the celular, and they will lik=
e to use the same mechanism for the wireline. This is very convenient, if y=
ou are using also an LTE interface on a wireline router as a backup of the =
wired link.

=20

I don=E2=80=99t agree is the worst IPv4-in-IPv6 mechanism, in fact it is th=
e most successful one, thanks in part to Android and Windows having impleme=
nted it.

=20

The point is not to discover the NAT64, this is easily done, as you indicat=
ed by using RFC7050 or even with PCP. This is already described in the docu=
ment.

=20

The point is the ISP to be able to turn on or off each mechanism (464XLAT, =
MAP, DS-Lite, etc.), and this is easily done if all them share the same DHC=
P option.

=20

I will like to understand if we still have such opposition, why.


Regards,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lorenzo Colitti <lorenzo=3D=
40google.com@dmarc.ietf.org>
Fecha: domingo, 10 de junio de 2018, 13:17
Para: <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

=20

On Sun, Jun 10, 2018 at 6:03 PM JORDI PALET MARTINEZ <jordi.palet=3D40consu=
lintel.es@dmarc.ietf.org> wrote:

So, the alternative I'm asking is, from a procedural point of view:
Can v6ops WG, just include an update in draft-ietf-v6ops-transition-ipv4aas=
 to add the option code for 464XLAT?

=20

ISTR that the last time this was discussed in v6ops there was substantial o=
pposition to a DHCPv6 option for 464xlat.

=20

To be honest, as a wireline ISP I don't see why you'd want to do 464xlat at=
 all. It's pretty much the worst of all the IPv4-over-IPv6 mechanisms. Its =
only advantage is that it's easy to deploy on mobile networks.

=20

If you do want to do 464xlat, it's much better to do discovery using RFC 70=
50. That way, hosts behind the CPE can discover the NAT64 by themselves, an=
d do smart things like AAAA synthesis and DNSSEC, and also provide input to=
 their happy eyeballs mechanisms that IPv4 is not native and thus may be le=
ss reliable.

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
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idered a criminal offense. If you are not the intended recipient be aware t=
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	font-family:"Calibri",sans-serif;
	color:windowtext;}
.MsoChpDefault
	{mso-style-type:export-only;
	font-size:10.0pt;}
@page WordSection1
	{size:612.0pt 792.0pt;
	margin:70.85pt 3.0cm 70.85pt 3.0cm;}
div.WordSection1
	{page:WordSection1;}
--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-la=
nguage:EN-US'>Hi Lorenzo,<o:p></o:p></span></p><p class=3DMsoNormal><span l=
ang=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></=
p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-=
US'>There are now many ISPs that have 464XLAT in the celular, and they will=
 like to use the same mechanism for the wireline. This is very convenient, =
if you are using also an LTE interface on a wireline router as a backup of =
the wired link.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-U=
S style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=
=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>I don=
=E2=80=99t agree is the worst IPv4-in-IPv6 mechanism, in fact it is the mos=
t successful one, thanks in part to Android and Windows having implemented =
it.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'm=
so-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal=
><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>The point is not t=
o discover the NAT64, this is easily done, as you indicated by using RFC705=
0 or even with PCP. This is already described in the document.<o:p></o:p></=
span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-langu=
age:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN=
-US style=3D'mso-fareast-language:EN-US'>The point is the ISP to be able to=
 turn on or off each mechanism (464XLAT, MAP, DS-Lite, etc.), and this is e=
asily done if all them share the same DHCP option.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'><=
o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D=
'mso-fareast-language:EN-US'>I will like to understand if we still have suc=
h opposition, why.<o:p></o:p></span></p><div><p class=3DMsoNormal><span lan=
g=3DEN-US style=3D'font-size:10.5pt;color:black'><br></span><span lang=3DES=
-TRAD style=3D'font-size:10.5pt;color:black'>Regards,<o:p></o:p></span></p>=
<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD st=
yle=3D'font-size:10.5pt;color:black;mso-fareast-language:EN-US'>Jordi<o:p><=
/o:p></span></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span l=
ang=3DES-TRAD style=3D'font-size:10.5pt;color:black;mso-fareast-language:EN=
-US'><o:p>&nbsp;</o:p></span></p></div><p class=3DMsoNormal><span lang=3DES=
-TRAD style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p c=
lass=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-fareast-language:EN-US'>=
<o:p>&nbsp;</o:p></span></p><div style=3D'border:none;border-top:solid #B5C=
4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal style=3D'margin-l=
eft:35.4pt'><b><span style=3D'font-size:12.0pt;color:black'>De: </span></b>=
<span style=3D'font-size:12.0pt;color:black'>v6ops &lt;v6ops-bounces@ietf.o=
rg&gt; en nombre de Lorenzo Colitti &lt;lorenzo=3D40google.com@dmarc.ietf.o=
rg&gt;<br><b>Fecha: </b>domingo, 10 de junio de 2018, 13:17<br><b>Para: </b=
>&lt;jordi.palet=3D40consulintel.es@dmarc.ietf.org&gt;<br><b>CC: </b>&quot;=
v6ops@ietf.org WG&quot; &lt;v6ops@ietf.org&gt;<br><b>Asunto: </b>Re: [v6ops=
] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aa=
s<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left=
:35.4pt'><o:p>&nbsp;</o:p></p></div><div><div><div><p class=3DMsoNormal sty=
le=3D'margin-left:35.4pt'>On Sun, Jun 10, 2018 at 6:03 PM JORDI PALET MARTI=
NEZ &lt;jordi.palet=3D<a href=3D"mailto:40consulintel.es@dmarc.ietf.org" ta=
rget=3D"_blank">40consulintel.es@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></=
p></div><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;pa=
dding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=3DMsoN=
ormal style=3D'margin-left:35.4pt'>So, the alternative I'm asking is, from =
a procedural point of view:<br>Can v6ops WG, just include an update in draf=
t-ietf-v6ops-transition-ipv4aas to add the option code for 464XLAT?<o:p></o=
:p></p></blockquote><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>=
<o:p>&nbsp;</o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>ISTR that the last time this was discussed =
in v6ops there was substantial opposition to a DHCPv6 option for 464xlat.<o=
:p></o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><=
o:p>&nbsp;</o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35=
.4pt'>To be honest, as a wireline ISP I don't see why you'd want to do 464x=
lat at all. It's pretty much the worst of all the IPv4-over-IPv6 mechanisms=
. Its only advantage is that it's easy to deploy on mobile networks.<o:p></=
o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&=
nbsp;</o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'=
>If you do want to do 464xlat, it's much better to do discovery using RFC 7=
050. That way, hosts behind the CPE can discover the NAT64 by themselves, a=
nd do smart things like AAAA synthesis and DNSSEC, and also provide input t=
o their happy eyeballs mechanisms that IPv4 is not native and thus may be l=
ess reliable.<o:p></o:p></p></div></div></div><p class=3DMsoNormal style=3D=
'margin-left:35.4pt'>_______________________________________________ v6ops =
mailing list v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops <o:=
p></o:p></p></div><br>**********************************************<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
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ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
<br>
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--B_3611488025_230449903--


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To: IPv6 Operations <v6ops@ietf.org>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Subject: [v6ops] A new IPv6-over-foo implementation report
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Hi,

Another important step in IPv6 deployment has occurred.

(The video is in Czech but the demo at the end is easy to understand.)

Forwarded with permission.

    Brian

-------- Forwarded Message --------
Subject: Re: RFC6214
Date: Wed, 6 Jun 2018 15:34:27 +0000
From: Tomas Horacek <THoracek@totalservice.cz>
To: Bob Hinden <bob.hinden@gmail.com>
CC: Brian Carpenter <brian.e.carpenter@gmail.com>, Vost=C5=99ez Radek <vo=
strez@oikt.czu.cz>


 Hello Bob and Brian.


 We did it, we have implemented your RFC6214 !

 Its 6.6. today, the day when IPv6 seminar takes place here in Prague: ht=
tps://www.cesnet.cz/akce/ipv6-2018/. We have presented our RFC6214 implem=
entation there with great success.

 The info, video is not yet available in English (only in Czech, sry).


 Video: https://www.youtube.com/watch?v=3DGTFXkXp_pig

 WebPage: https://www.rfc6214.com/ -> https://translate.google.com/transl=
ate?hl=3Den&sl=3Dauto&tl=3Den&u=3Dhttps%3A%2F%2Frfc6214.com<https://www.r=
fc6214.com>


 Have a nice day :).

________________________________
From: Tomas Horacek
Sent: Wednesday, May 2, 2018 4:03 PM
To: Bob Hinden
Cc: Brian Carpenter
Subject: Re: RFC6214



 Thank you Bob for your quick reply.


 We are aware of the publishing date :-).


S pozdravem / Best regards


Tom=C3=A1=C5=A1 Hor=C3=A1=C4=8Dek
[https://portal.totalservice.cz/AV_logo_all.jpg]

LAN/WAN security supervisor

M:  +420 731 450 906



thoracek@totalservice.cz<mailto:thoracek@totalservice.cz>



TOTAL SERVICE s.r.o.




U Uranie 954/18

T:  +420 270 002 811


170 00 Praha 7 Czech Republic

www.totalservice.cz<http://www.totalservice.cz>


INFORMACE: Tato zpr=C3=A1va a p=C5=99ipojen=C3=A9 p=C5=99=C3=ADlohy jsou =
ur=C4=8Deny v=C3=BDhradn=C4=9B v n=C3=AD uveden=C3=A9mu p=C5=99=C3=ADjemc=
i a mohou obsahovat d=C5=AFv=C4=9Brn=C3=A9, osobn=C3=AD nebo chr=C3=A1n=C4=
=9Bn=C3=A9 informace. Pokud jste tuto zpr=C3=A1vu obdr=C5=BEeli omylem ne=
bo nedopat=C5=99en=C3=ADm, uv=C4=9Bdomte, pros=C3=ADm, odes=C3=ADlatele a=
 sma=C5=BEte tuto zpr=C3=A1vu. Tato zpr=C3=A1va nen=C3=AD n=C3=A1vrhem na=
 uzav=C5=99en=C3=AD smlouvy ani jeho p=C5=99ijet=C3=ADm, leda=C5=BEe je t=
ak v textu v=C3=BDslovn=C4=9B uvedeno. P=C5=99ijet=C3=AD jak=C3=A9koliv n=
ab=C3=ADdky nebo dokon=C4=8Den=C3=AD jedn=C3=A1n=C3=AD je =C3=BA=C4=8Dinn=
=C3=A9 v=C3=BDhradn=C4=9B uzav=C5=99en=C3=ADm p=C3=ADsemn=C3=A9 smlouvy p=
odepsan=C3=A9 statut=C3=A1rn=C3=ADm org=C3=A1nem nebo jinou opr=C3=A1vn=C4=
=9Bnou =C4=8Di p=C3=ADsemn=C4=9B pov=C4=9B=C5=99enou osobou.


________________________________
From: Bob Hinden <bob.hinden@gmail.com>
Sent: Wednesday, May 2, 2018 3:44 PM
To: Tomas Horacek
Cc: Bob Hinden; Brian Carpenter
Subject: Re: RFC6214

Tomas,

I am not aware of any implementations.

Please look carefully at the date this RFC was published :-)

Bob

> On May 2, 2018, at 8:41 AM, Tomas Horacek <THoracek@totalservice.cz> wr=
ote:
>
>
>  Hello there Robert,
>  I am very sorry to interrupt you.
>
>  I just wanted to ask, is there yet real-life implementation of your RF=
C6214 ?
>
>  If so, can you please share a link or a contact to the person/group th=
at implemented it ?
>  If not, can you please give a advice, if any ?
>
>  Thank you for your time, patience, understanding. And thank you in adv=
ance for your reply.
>
>  :-)
>
> S pozdravem / Best regards
>
> Tom=C3=A1=C5=A1 Hor=C3=A1=C4=8Dek
>
>
> LAN/WAN security supervisor
> M:  +420 731 450 906
> thoracek@totalservice.cz
>
> TOTAL SERVICE s.r.o.
>
> U Uranie 954/18
> T:  +420 270 002 811
> 170 00 Praha 7 Czech Republic
> www.totalservice.cz<http://www.totalservice.cz>
> INFORMACE: Tato zpr=C3=A1va a p=C5=99ipojen=C3=A9 p=C5=99=C3=ADlohy jso=
u ur=C4=8Deny v=C3=BDhradn=C4=9B v n=C3=AD uveden=C3=A9mu p=C5=99=C3=ADje=
mci a mohou obsahovat d=C5=AFv=C4=9Brn=C3=A9, osobn=C3=AD nebo chr=C3=A1n=
=C4=9Bn=C3=A9 informace. Pokud jste tuto zpr=C3=A1vu obdr=C5=BEeli omylem=
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e a sma=C5=BEte tuto zpr=C3=A1vu. Tato zpr=C3=A1va nen=C3=AD n=C3=A1vrhem=
 na uzav=C5=99en=C3=AD smlouvy ani jeho p=C5=99ijet=C3=ADm, leda=C5=BEe j=
e tak v textu v=C3=BDslovn=C4=9B uvedeno. P=C5=99ijet=C3=AD jak=C3=A9koli=
v nab=C3=ADdky nebo dokon=C4=8Den=C3=AD jedn=C3=A1n=C3=AD je =C3=BA=C4=8D=
inn=C3=A9 v=C3=BDhradn=C4=9B uzav=C5=99en=C3=ADm p=C3=ADsemn=C3=A9 smlouv=
y podepsan=C3=A9 statut=C3=A1rn=C3=ADm org=C3=A1nem nebo jinou opr=C3=A1v=
n=C4=9Bnou =C4=8Di p=C3=ADsemn=C4=9B pov=C4=9B=C5=99enou osobou.




From nobody Mon Jun 11 00:39:59 2018
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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Subject: Re: [v6ops] A new IPv6-over-foo implementation report
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Hi,

Congratulations to the designers and the realizers.
It is potentially an extremely useful tool.

The video explains in Czech how RFC6214 "IPv6 over Avian Carriers" is 
supposed to work.

Then it shows implementation: computer creates Echo Request, prints a 
barcode (QR Code?), human attaches it to pigeon, and sends it up flying; 
it lands in another house, human detaches code, reads with smartphone, 
generates Reply, attaches to another pigeon, and sends back.

People speak Czech, but there is a German flag at the landing site.

The website rfc6214.com shows a packet dump and it is indeed IPv6.

I wonder what was the communication range?  a few meters, or kilometers?

Thanks,

Alex

Le 10/06/2018 à 22:09, Brian E Carpenter a écrit :
> Hi,
> 
> Another important step in IPv6 deployment has occurred.
> 
> (The video is in Czech but the demo at the end is easy to understand.)
> 
> Forwarded with permission.
> 
>      Brian
> 
> -------- Forwarded Message --------
> Subject: Re: RFC6214
> Date: Wed, 6 Jun 2018 15:34:27 +0000
> From: Tomas Horacek <THoracek@totalservice.cz>
> To: Bob Hinden <bob.hinden@gmail.com>
> CC: Brian Carpenter <brian.e.carpenter@gmail.com>, Vostřez Radek <vostrez@oikt.czu.cz>
> 
> 
>   Hello Bob and Brian.
> 
> 
>   We did it, we have implemented your RFC6214 !
> 
>   Its 6.6. today, the day when IPv6 seminar takes place here in Prague: https://www.cesnet.cz/akce/ipv6-2018/. We have presented our RFC6214 implementation there with great success.
> 
>   The info, video is not yet available in English (only in Czech, sry).
> 
> 
>   Video: https://www.youtube.com/watch?v=GTFXkXp_pig
> 
>   WebPage: https://www.rfc6214.com/ -> https://translate.google.com/translate?hl=en&sl=auto&tl=en&u=https%3A%2F%2Frfc6214.com<https://www.rfc6214.com>
> 
> 
>   Have a nice day :).
> 
> ________________________________
> From: Tomas Horacek
> Sent: Wednesday, May 2, 2018 4:03 PM
> To: Bob Hinden
> Cc: Brian Carpenter
> Subject: Re: RFC6214
> 
> 
> 
>   Thank you Bob for your quick reply.
> 
> 
>   We are aware of the publishing date :-).
> 
> 
> S pozdravem / Best regards
> 
> 
> Tomáš Horáček
> [https://portal.totalservice.cz/AV_logo_all.jpg]
> 
> LAN/WAN security supervisor
> 
> M:  +420 731 450 906
> 
> 
> 
> thoracek@totalservice.cz<mailto:thoracek@totalservice.cz>
> 
> 
> 
> TOTAL SERVICE s.r.o.
> 
> 
> 
> 
> U Uranie 954/18
> 
> T:  +420 270 002 811
> 
> 
> 170 00 Praha 7 Czech Republic
> 
> www.totalservice.cz<http://www.totalservice.cz>
> 
> 
> INFORMACE: Tato zpráva a připojené přílohy jsou určeny výhradně v ní uvedenému příjemci a mohou obsahovat důvěrné, osobní nebo chráněné informace. Pokud jste tuto zprávu obdrželi omylem nebo nedopatřením, uvědomte, prosím, odesílatele a smažte tuto zprávu. Tato zpráva není návrhem na uzavření smlouvy ani jeho přijetím, ledaže je tak v textu výslovně uvedeno. Přijetí jakékoliv nabídky nebo dokončení jednání je účinné výhradně uzavřením písemné smlouvy podepsané statutárním orgánem nebo jinou oprávněnou či písemně pověřenou osobou.
> 
> 
> ________________________________
> From: Bob Hinden <bob.hinden@gmail.com>
> Sent: Wednesday, May 2, 2018 3:44 PM
> To: Tomas Horacek
> Cc: Bob Hinden; Brian Carpenter
> Subject: Re: RFC6214
> 
> Tomas,
> 
> I am not aware of any implementations.
> 
> Please look carefully at the date this RFC was published :-)
> 
> Bob
> 
>> On May 2, 2018, at 8:41 AM, Tomas Horacek <THoracek@totalservice.cz> wrote:
>>
>>
>>   Hello there Robert,
>>   I am very sorry to interrupt you.
>>
>>   I just wanted to ask, is there yet real-life implementation of your RFC6214 ?
>>
>>   If so, can you please share a link or a contact to the person/group that implemented it ?
>>   If not, can you please give a advice, if any ?
>>
>>   Thank you for your time, patience, understanding. And thank you in advance for your reply.
>>
>>   :-)
>>
>> S pozdravem / Best regards
>>
>> Tomáš Horáček
>>
>>
>> LAN/WAN security supervisor
>> M:  +420 731 450 906
>> thoracek@totalservice.cz
>>
>> TOTAL SERVICE s.r.o.
>>
>> U Uranie 954/18
>> T:  +420 270 002 811
>> 170 00 Praha 7 Czech Republic
>> www.totalservice.cz<http://www.totalservice.cz>
>> INFORMACE: Tato zpráva a připojené přílohy jsou určeny výhradně v ní uvedenému příjemci a mohou obsahovat důvěrné, osobní nebo chráněné informace. Pokud jste tuto zprávu obdrželi omylem nebo nedopatřením, uvědomte, prosím, odesílatele a smažte tuto zprávu. Tato zpráva není návrhem na uzavření smlouvy ani jeho přijetím, ledaže je tak v textu výslovně uvedeno. Přijetí jakékoliv nabídky nebo dokončení jednání je účinné výhradně uzavřením písemné smlouvy podepsané statutárním orgánem nebo jinou oprávněnou či písemně pověřenou osobou.
> 
> 
> 
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
> 


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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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--000000000000b59a97056e5d02aa
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On Sun, Jun 10, 2018 at 10:07 PM JORDI PALET MARTINEZ <jordi.palet=3D
40consulintel.es@dmarc.ietf.org> wrote:

> There are now many ISPs that have 464XLAT in the celular, and they will
> like to use the same mechanism for the wireline. This is very convenient,
> if you are using also an LTE interface on a wireline router as a backup o=
f
> the wired link.
>

Then they can use RFC 7050, which already works today both in their
networks and in client implementations.


> I don=E2=80=99t agree is the worst IPv4-in-IPv6 mechanism, in fact it is =
the most
> successful one, thanks in part to Android and Windows having implemented =
it.
>

It's successful in mobile. It isn't successful in wireline, and IMO it does
not deserve to be since there are much better transition mechanisms.


> The point is the ISP to be able to turn on or off each mechanism (464XLAT=
,
> MAP, DS-Lite, etc.), and this is easily done if all them share the same
> DHCP option.
>

The ISP can easily turn off 464xlat via DHCPv6 today: just provide DNS
servers that don't do DNS64 translation.


> I will like to understand if we still have such opposition, why.
>

Because it requires additional standards work, engineering work and
implementation complexity to achieve something that is already possible
today using RFC 7050.

--000000000000b59a97056e5d02aa
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<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">On Sun, Jun 10=
, 2018 at 10:07 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto=
:40consulintel.es@dmarc.ietf.org">40consulintel.es@dmarc.ietf.org</a>&gt; w=
rote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex=
;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"ES" link=3D"blue=
" vlink=3D"purple"><div class=3D"m_1139825420093985926WordSection1"><p clas=
s=3D"MsoNormal">There are now many ISPs that have 464XLAT in the celular, a=
nd they will like to use the same mechanism for the wireline. This is very =
convenient, if you are using also an LTE interface on a wireline router as =
a backup of the wired link.<br></p></div></div></blockquote><div><br></div>=
<div>Then they can use RFC 7050, which already works today both in their ne=
tworks and in client implementations.</div><div>=C2=A0</div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pa=
dding-left:1ex"><div lang=3D"ES" link=3D"blue" vlink=3D"purple"><div class=
=3D"m_1139825420093985926WordSection1"><p class=3D"MsoNormal"></p><p class=
=3D"MsoNormal">I don=E2=80=99t agree is the worst IPv4-in-IPv6 mechanism, i=
n fact it is the most successful one, thanks in part to Android and Windows=
 having implemented it.<br></p></div></div></blockquote><div><br></div><div=
>It&#39;s successful in mobile. It isn&#39;t successful in wireline, and IM=
O it does not deserve to be since there are much better transition mechanis=
ms.</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"ES" l=
ink=3D"blue" vlink=3D"purple"><div class=3D"m_1139825420093985926WordSectio=
n1"><p class=3D"MsoNormal"></p><p class=3D"MsoNormal">The point is the ISP =
to be able to turn on or off each mechanism (464XLAT, MAP, DS-Lite, etc.), =
and this is easily done if all them share the same DHCP option.<br></p></di=
v></div></blockquote><div><br></div><div>The ISP can easily turn off 464xla=
t via DHCPv6 today: just provide DNS servers that don&#39;t do DNS64 transl=
ation.</div><div>=C2=A0=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lan=
g=3D"ES" link=3D"blue" vlink=3D"purple"><div class=3D"m_1139825420093985926=
WordSection1"><p class=3D"MsoNormal"><span lang=3D"EN-US">I will like to un=
derstand if we still have such opposition, why.</span></p></div></div></blo=
ckquote><div><br></div><div>Because it requires additional standards work, =
engineering work and implementation complexity to achieve something that is=
 already possible today using RFC 7050.</div></div></div>

--000000000000b59a97056e5d02aa--


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Date: Mon, 11 Jun 2018 14:55:26 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
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Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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There are now many ISPs that have 464XLAT in the celular, and they will lik=
e to use the same mechanism for the wireline. This is very convenient, if y=
ou are using also an LTE interface on a wireline router as a backup of the =
wired link.

=20

Then they can use RFC 7050, which already works today both in their network=
s and in client implementations.

=20

I don=E2=80=99t agree is the worst IPv4-in-IPv6 mechanism, in fact it is th=
e most successful one, thanks in part to Android and Windows having impleme=
nted it.

=20

It's successful in mobile. It isn't successful in wireline, and IMO it does=
 not deserve to be since there are much better transition mechanisms.

=20

Each network is a different case, and in many cases 464XLAT is much better =
than any other mechanism in wireline, WISP, etc. Every ISP has their own vi=
ew/decision on this. We just need to provide the tools to make it feasible.

=20

The point is the ISP to be able to turn on or off each mechanism (464XLAT, =
MAP, DS-Lite, etc.), and this is easily done if all them share the same DHC=
P option.

=20

The ISP can easily turn off 464xlat via DHCPv6 today: just provide DNS serv=
ers that don't do DNS64 translation.

=20

No, that is not a solution, at least not for the scope of what is needed in=
 this document.

You can run 464XLAT without DNS64, so to avoid breaking DNSSEC, so that wil=
l not work.

Also, users tend to change their DNS servers, so once more this doesn=E2=80=
=99t work.

We need something very simple to explicitly tell the CE =E2=80=9Cyou MUST E=
NABLE/DISABLE the CLAT=E2=80=9D.

Fortunately this is already there: RFC8026, we just need a new option code.

 =20

I will like to understand if we still have such opposition, why.

=20

Because it requires additional standards work, engineering work and impleme=
ntation complexity to achieve something that is already possible today usin=
g RFC 7050.

=20

I believe you=E2=80=99re misunderstanding what is needed here. I=E2=80=99m =
not talking about a new DHCPv6 way to =E2=80=9Cfind=E2=80=9D the NAT64 pref=
ix or server. This is already done by RFC7050 or RFC7225 (PCP).=20

It is not a NEW DHCPv6 protocol. Is a new option code in an existing protoc=
ol (RFC8026). There is nothing new to develop. We just need to tell IANA =
=E2=80=9Cin addition to the already defined option codes for DS-LITE, MAP, =
etc., define one for 464XLAT=E2=80=9D.

=20

What we have now is:

=20

+-------------+--------------------+-----------+

| Option Code |=C2=A0=C2=A0 S46 Mechanism=C2=A0=C2=A0=C2=A0 | Reference |

+-------------+--------------------+-----------+

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 64=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 DS-Lite=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | [RFC6334] |

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 88=C2=A0=C2=A0=C2=A0=C2=A0 | DHCPv4 over DH=
CPv6 | [RFC7341] |

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 94=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 MAP-E=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | [RF=
C7598] |

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 95=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 MAP-T=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0| [RF=
C7598] |

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 96=C2=A0=C2=A0=C2=A0=C2=A0 | Lightweight 4o=
ver6 | [RFC7598] |

+-------------+--------------------+-----------+

=20

And what we need is to add a code for 464XLAT, so it will become:

=20

+-------------+--------------------+-----------+

| Option Code |=C2=A0=C2=A0 S46 Mechanism=C2=A0=C2=A0=C2=A0 | Reference |

+-------------+--------------------+-----------+

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 64=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 DS-Lite=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | [RFC6334] |

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 88=C2=A0=C2=A0=C2=A0=C2=A0 | DHCPv4 over DH=
CPv6 | [RFC7341] |

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 94=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 MAP-E=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | [RF=
C7598] |

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 95=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 MAP-T=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0| [RF=
C7598] |

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 96=C2=A0=C2=A0=C2=A0=C2=A0 | Lightweight 4o=
ver6 | [RFC7598] |

|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 xy=C2=A0=C2=A0=C2=A0=C2=A0 | =C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0464XLAT=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0| [RFC6877] |

+-------------+--------------------+-----------+

=20

I believe this is a very frequent usage of new option codes, for existing p=
rotocols, via the IANA section.

=20

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20



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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margi=
n-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>There are now many=
 ISPs that have 464XLAT in the celular, and they will like to use the same =
mechanism for the wireline. </span>This is very convenient, if you are usin=
g also an LTE interface on a wireline router as a backup of the wired link.=
<o:p></o:p></p><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>=
&nbsp;</o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt=
'>Then they can use RFC 7050, which already works today both in their netwo=
rks and in client implementations.<o:p></o:p></p></div><div><p class=3DMsoN=
ormal style=3D'margin-left:35.4pt'>&nbsp;<o:p></o:p></p></div><blockquote s=
tyle=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0=
pt;margin-left:4.8pt;margin-right:0cm'><div><div><p class=3DMsoNormal style=
=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'>=
I don=E2=80=99t agree is the worst IPv4-in-IPv6 mechanism, in fact it is th=
e most successful one, thanks in part to Android and Windows having impleme=
nted it.<o:p></o:p></p></div></div></blockquote><div><p class=3DMsoNormal s=
tyle=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div><div><p class=3DMsoN=
ormal style=3D'margin-left:35.4pt'>It's successful in mobile. It isn't succ=
essful in wireline, and IMO it does not deserve to be since there are much =
better transition mechanisms.<o:p></o:p></p></div><div><p class=3DMsoNormal=
><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span lang=3DEN-US>Each network =
is a different case, and in many cases 464XLAT is much better than any othe=
r mechanism in wireline, WISP, etc. Every ISP has their own view/decision o=
n this. We just need to provide the tools to make it feasible.<o:p></o:p></=
span></p><p class=3DMsoNormal><span lang=3DEN-US>&nbsp;<o:p></o:p></span></=
p></div><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;pa=
dding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p cl=
ass=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
;margin-left:35.4pt'>The point is the ISP to be able to turn on or off each=
 mechanism (464XLAT, MAP, DS-Lite, etc.), and this is easily done if all th=
em share the same DHCP option.<o:p></o:p></p></div></div></blockquote><div>=
<p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></di=
v><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>The ISP can easily=
 turn off 464xlat via DHCPv6 today: just provide DNS servers that don't do =
DNS64 translation.<o:p></o:p></p></div><div><p class=3DMsoNormal><o:p>&nbsp=
;</o:p></p><p class=3DMsoNormal><span lang=3DEN-US>No, that is not a soluti=
on, at least not for the scope of what is needed in this document.<o:p></o:=
p></span></p><p class=3DMsoNormal><span lang=3DEN-US>You can run 464XLAT wi=
thout DNS64, so to avoid breaking DNSSEC, so that will not work.<o:p></o:p>=
</span></p><p class=3DMsoNormal><span lang=3DEN-US>Also, users tend to chan=
ge their DNS servers, so once more this doesn=E2=80=99t work.<o:p></o:p></s=
pan></p><p class=3DMsoNormal><span lang=3DEN-US>We need something very simp=
le to explicitly tell the CE =E2=80=9Cyou MUST ENABLE/DISABLE the CLAT=E2=
=80=9D.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>Fortun=
ately this is already there: RFC8026, we just need a new option code.<o:p><=
/o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>&nbsp;&nbsp;<o:p></=
o:p></span></p></div><blockquote style=3D'border:none;border-left:solid #CC=
CCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><d=
iv><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bo=
ttom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>I will like to underst=
and if we still have such opposition, why.</span><o:p></o:p></p></div></div=
></blockquote><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&=
nbsp;</o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'=
>Because it requires additional standards work, engineering work and implem=
entation complexity to achieve something that is already possible today usi=
ng RFC 7050.<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span la=
ng=3DEN-US>I believe you=E2=80=99re misunderstanding what is needed here. I=
=E2=80=99m not talking about a new DHCPv6 way to =E2=80=9Cfind=E2=80=9D the=
 NAT64 prefix or server. This is already done by RFC7050 or RFC7225 (PCP). =
<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>It is not a N=
EW DHCPv6 protocol. Is a new option code in an existing protocol (RFC8026).=
 There is nothing new to develop. We just need to tell IANA =E2=80=9Cin add=
ition to the already defined option codes for DS-LITE, MAP, etc., define on=
e for 464XLAT=E2=80=9D.<o:p></o:p></span></p><p class=3DMsoNormal><span lan=
g=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-=
US>What we have now is:<o:p></o:p></span></p><p class=3DMsoNormal><span lan=
g=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal style=3D'backgro=
und:white;word-break:break-all'><span lang=3DEN-US style=3D'font-size:10.5p=
t;font-family:"PT Mono";color:black'>+-------------+--------------------+--=
---------+<o:p></o:p></span></p><p class=3DMsoNormal style=3D'background:wh=
ite;word-break:break-all'><span lang=3DEN-US style=3D'font-size:10.5pt;font=
-family:"PT Mono";color:black'>| Option Code |=C2=A0=C2=A0 S46 Mechanism=C2=
=A0=C2=A0=C2=A0 | Reference |<o:p></o:p></span></p><p class=3DMsoNormal sty=
le=3D'background:white;word-break:break-all'><span lang=3DEN-US style=3D'fo=
nt-size:10.5pt;font-family:"PT Mono";color:black'>+-------------+----------=
----------+-----------+<o:p></o:p></span></p><p class=3DMsoNormal style=3D'=
background:white;word-break:break-all'><span lang=3DEN-US style=3D'font-siz=
e:10.5pt;font-family:"PT Mono";color:black'>|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 64=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 DS-Lite=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | [</span><span style=3D'font-size:10.5pt;fo=
nt-family:"PT Mono";color:black'><a href=3D"https://datatracker.ietf.org/do=
c/html/rfc6334"><span lang=3DEN-US style=3D'color:#3D22B3'>RFC6334</span></=
a></span><span lang=3DEN-US style=3D'font-size:10.5pt;font-family:"PT Mono"=
;color:black'>] |<o:p></o:p></span></p><p class=3DMsoNormal style=3D'backgr=
ound:white;word-break:break-all'><span lang=3DEN-US style=3D'font-size:10.5=
pt;font-family:"PT Mono";color:black'>|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 88=C2=
=A0=C2=A0=C2=A0=C2=A0 | DHCPv4 over DHCPv6 | [</span><span style=3D'font-si=
ze:10.5pt;font-family:"PT Mono";color:black'><a href=3D"https://datatracker=
.ietf.org/doc/html/rfc7341"><span lang=3DEN-US style=3D'color:#3D22B3'>RFC7=
341</span></a></span><span lang=3DEN-US style=3D'font-size:10.5pt;font-fami=
ly:"PT Mono";color:black'>] |<o:p></o:p></span></p><p class=3DMsoNormal sty=
le=3D'background:white;word-break:break-all'><span lang=3DEN-US style=3D'fo=
nt-size:10.5pt;font-family:"PT Mono";color:black'>|=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 94=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 MAP=
-E=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | [</span><span style=3D'font-=
size:10.5pt;font-family:"PT Mono";color:black'><a href=3D"https://datatrack=
er.ietf.org/doc/html/rfc7598"><span lang=3DEN-US style=3D'color:#3D22B3'>RF=
C7598</span></a></span><span lang=3DEN-US style=3D'font-size:10.5pt;font-fa=
mily:"PT Mono";color:black'>] |<o:p></o:p></span></p><p class=3DMsoNormal s=
tyle=3D'background:white;word-break:break-all'><span lang=3DEN-US style=3D'=
font-size:10.5pt;font-family:"PT Mono";color:black'>|=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 95=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =
MAP-T=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0| [</span><span style=3D'fo=
nt-size:10.5pt;font-family:"PT Mono";color:black'><a href=3D"https://datatr=
acker.ietf.org/doc/html/rfc7598"><span lang=3DEN-US style=3D'color:#3D22B3'=
>RFC7598</span></a></span><span lang=3DEN-US style=3D'font-size:10.5pt;font=
-family:"PT Mono";color:black'>] |<o:p></o:p></span></p><p class=3DMsoNorma=
l style=3D'background:white;word-break:break-all'><span lang=3DEN-US style=
=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>|=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 96=C2=A0=C2=A0=C2=A0=C2=A0 | Lightweight 4over6 | [</span><spa=
n style=3D'font-size:10.5pt;font-family:"PT Mono";color:black'><a href=3D"h=
ttps://datatracker.ietf.org/doc/html/rfc7598"><span lang=3DEN-US style=3D'c=
olor:#3D22B3'>RFC7598</span></a></span><span lang=3DEN-US style=3D'font-siz=
e:10.5pt;font-family:"PT Mono";color:black'>] |<o:p></o:p></span></p><p cla=
ss=3DMsoNormal style=3D'background:white;word-break:break-all'><span lang=
=3DEN-US style=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>+----=
---------+--------------------+-----------+<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p=
 class=3DMsoNormal><span lang=3DEN-US>And what we need is to add a code for=
 464XLAT, so it will become:<o:p></o:p></span></p><p class=3DMsoNormal><spa=
n lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal style=3D'ba=
ckground:white;word-break:break-all'><span lang=3DEN-US style=3D'font-size:=
10.5pt;font-family:"PT Mono";color:black'>+-------------+------------------=
--+-----------+<o:p></o:p></span></p><p class=3DMsoNormal style=3D'backgrou=
nd:white;word-break:break-all'><span lang=3DEN-US style=3D'font-size:10.5pt=
;font-family:"PT Mono";color:black'>| Option Code |=C2=A0=C2=A0 S46 Mechani=
sm=C2=A0=C2=A0=C2=A0 | Reference |<o:p></o:p></span></p><p class=3DMsoNorma=
l style=3D'background:white;word-break:break-all'><span lang=3DEN-US style=
=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>+-------------+----=
----------------+-----------+<o:p></o:p></span></p><p class=3DMsoNormal sty=
le=3D'background:white;word-break:break-all'><span lang=3DEN-US style=3D'fo=
nt-size:10.5pt;font-family:"PT Mono";color:black'>|=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 64=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 DS-Lite=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | [</span><span style=3D'font-size:10.=
5pt;font-family:"PT Mono";color:black'><a href=3D"https://datatracker.ietf.=
org/doc/html/rfc6334"><span lang=3DEN-US style=3D'color:#3D22B3'>RFC6334</s=
pan></a></span><span lang=3DEN-US style=3D'font-size:10.5pt;font-family:"PT=
 Mono";color:black'>] |<o:p></o:p></span></p><p class=3DMsoNormal style=3D'=
background:white;word-break:break-all'><span lang=3DEN-US style=3D'font-siz=
e:10.5pt;font-family:"PT Mono";color:black'>|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
 88=C2=A0=C2=A0=C2=A0=C2=A0 | DHCPv4 over DHCPv6 | [</span><span style=3D'f=
ont-size:10.5pt;font-family:"PT Mono";color:black'><a href=3D"https://datat=
racker.ietf.org/doc/html/rfc7341"><span lang=3DEN-US style=3D'color:#3D22B3=
'>RFC7341</span></a></span><span lang=3DEN-US style=3D'font-size:10.5pt;fon=
t-family:"PT Mono";color:black'>] |<o:p></o:p></span></p><p class=3DMsoNorm=
al style=3D'background:white;word-break:break-all'><span lang=3DEN-US style=
=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>|=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 94=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0 MAP-E=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 | [</span><span style=
=3D'font-size:10.5pt;font-family:"PT Mono";color:black'><a href=3D"https://=
datatracker.ietf.org/doc/html/rfc7598"><span lang=3DEN-US style=3D'color:#3=
D22B3'>RFC7598</span></a></span><span lang=3DEN-US style=3D'font-size:10.5p=
t;font-family:"PT Mono";color:black'>] |<o:p></o:p></span></p><p class=3DMs=
oNormal style=3D'background:white;word-break:break-all'><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>|=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 95=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 MAP-T=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0| [</span><span s=
tyle=3D'font-size:10.5pt;font-family:"PT Mono";color:black'><a href=3D"http=
s://datatracker.ietf.org/doc/html/rfc7598"><span lang=3DEN-US style=3D'colo=
r:#3D22B3'>RFC7598</span></a></span><span lang=3DEN-US style=3D'font-size:1=
0.5pt;font-family:"PT Mono";color:black'>] |<o:p></o:p></span></p><p class=
=3DMsoNormal style=3D'background:white;word-break:break-all'><span lang=3DE=
N-US style=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>|=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0 96=C2=A0=C2=A0=C2=A0=C2=A0 | Lightweight 4over6 | =
[</span><span style=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>=
<a href=3D"https://datatracker.ietf.org/doc/html/rfc7598"><span lang=3DEN-U=
S style=3D'color:#3D22B3'>RFC7598</span></a></span><span lang=3DEN-US style=
=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>] |<o:p></o:p></spa=
n></p><p class=3DMsoNormal style=3D'background:white;word-break:break-all'>=
<span lang=3DEN-US style=3D'font-size:10.5pt;font-family:"PT Mono";color:bl=
ack'>|=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 xy=C2=A0=C2=A0=C2=A0=C2=A0 | =C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0464XLAT=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0| [</span>=
<span style=3D'font-size:10.5pt;font-family:"PT Mono";color:black'><a href=
=3D"https://datatracker.ietf.org/doc/html/rfc6877"><span lang=3DEN-US style=
=3D'color:#3D22B3'>RFC6877</span></a></span><span lang=3DEN-US style=3D'fon=
t-size:10.5pt;font-family:"PT Mono";color:black'>] |<o:p></o:p></span></p><=
p class=3DMsoNormal style=3D'background:white;word-break:break-all'><span l=
ang=3DEN-US style=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>+-=
------------+--------------------+-----------+<o:p></o:p></span></p><p clas=
s=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>I believe this is a ver=
y frequent usage of new option codes, for existing protocols, via the IANA =
section.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US><o:p>=
&nbsp;</o:p></span></p></div><p class=3DMsoNormal style=3D'margin-left:35.4=
pt'>_______________________________________________ v6ops mailing list v6op=
s@ietf.org https://www.ietf.org/mailman/listinfo/v6ops <o:p></o:p></p></div=
><br>**********************************************<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
<br>
</body></html>

--B_3611573726_611820195--


From nobody Mon Jun 11 06:08:10 2018
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To: v6ops@ietf.org
Cc: JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org>
From: Philip Homburg <pch-v6ops-8@u-1.phicoh.com>
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In-reply-to: Your message of "Mon, 11 Jun 2018 14:55:26 +0200 ." <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> 
Date: Mon, 11 Jun 2018 15:08:00 +0200
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/SkiTLGz50ScS3XNwQ0SPb3uw2aI>
Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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>    I believe you're misunderstanding what is needed here. I'm not
>    talking about a new DHCPv6 way to "find" the NAT64 prefix or
>    server. This is already done by RFC7050 or RFC7225 (PCP).

If you can detect the presence of NAT64 using either RFC7050 or RFC7225 then
why do you need a separate DHCPv6 option?


From nobody Mon Jun 11 06:15:30 2018
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Date: Mon, 11 Jun 2018 15:15:18 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Philip Homburg <pch-v6ops-8@u-1.phicoh.com>, <v6ops@ietf.org>
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Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Hi Philip,

The point is not to detect the NAT64, is to tell the CE "use it or not".

You may have a network with some customers that you want to use 464XLAT, ot=
hers only IPv6, others dual-stack.

If we use a detection mechanism based in RFC7050 and RFC7225, the CE must t=
ry both. Even more, if in the future there is another way defined for the N=
AT64, the CE also need to try that.

But the worst is that you're forcing all the customers the same way. This i=
s what it was discussed a few days ago. The ISP want to have different cust=
omers using different transition mechanisms, because he may be in the middl=
e of a transition, or the customers have different "properties", etc., and =
we need to allow it.

Again, is not a new DHCP option. Is a new "option code" for the RFC8026. No=
t a new "DHCP" mechanism to develop.

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: <pch-bCE2691D2@u-1.phicoh.com> en nombre de Philip Homburg <pch-v6ops-8=
@u-1.phicoh.com>
Fecha: lunes, 11 de junio de 2018, 15:08
Para: <v6ops@ietf.org>
CC: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas=20

    >    I believe you're misunderstanding what is needed here. I'm not
    >    talking about a new DHCPv6 way to "find" the NAT64 prefix or
    >    server. This is already done by RFC7050 or RFC7225 (PCP).
   =20
    If you can detect the presence of NAT64 using either RFC7050 or RFC7225=
 then
    why do you need a separate DHCPv6 option?
   =20
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
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idered a criminal offense. If you are not the intended recipient be aware t=
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formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.




From nobody Mon Jun 11 06:48:05 2018
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/jDtx1k7PISfmCjrhsbygZqZ0ADw>
Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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> The point is not to detect the NAT64, is to tell the CE "use it or
> not".
> 
> You may have a network with some customers that you want to use
> 464XLAT, others only IPv6, others dual-stack.
> 
> If we use a detection mechanism based in RFC7050 and RFC7225, the
> CE must try both. Even more, if in the future there is another way
> defined for the NAT64, the CE also need to try that.

A CPE already has to have code for both RFC7050 and RFC7225 because it still
has to find the translation prefix.

Your DHCPv6 code point doesn't tell the CPE which protocol to use. Worse, you
could send the prefix directly in DHCPv6 avoiding the need to run RFC7050 or
RFC7225 in the first place.

Note that there are multiple ways to have per customer DNS resolvers settings.
One option is to vary the addresses of the DNS resolvers assigned to a
particular link. Another is the use of ACLs in a DNS resolver to give
different views to different devices.

So the drawback of your proposal is that everybody (both CPE vendors and
operators) has to implement the DHCPv6 option, only for the benefit of those
operators that want to mix and match customers without resorting to other
mechanisms.

Personally I think that if you would make it mandatory for a CPE to issue a
DHCPv6 request to find out about NAT64, then at least return the prefix as
well.



From nobody Mon Jun 11 07:05:44 2018
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Date: Mon, 11 Jun 2018 16:05:33 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Philip Homburg <pch-v6ops-8@u-1.phicoh.com>, <v6ops@ietf.org>
Message-ID: <980A4003-336C-4B99-BFD2-725B261F40BA@consulintel.es>
Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <m1fSMYD-0000FrC@stereo.hq.phicoh.net> <1E283759-AB5E-4D0A-A6E6-2A06B95E7D6C@consulintel.es> <m1fSNAr-0000FDC@stereo.hq.phicoh.net>
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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    > The point is not to detect the NAT64, is to tell the CE "use it or
    > not".
    > 
    > You may have a network with some customers that you want to use
    > 464XLAT, others only IPv6, others dual-stack.
    > 
    > If we use a detection mechanism based in RFC7050 and RFC7225, the
    > CE must try both. Even more, if in the future there is another way
    > defined for the NAT64, the CE also need to try that.
    
    A CPE already has to have code for both RFC7050 and RFC7225 because it still
    has to find the translation prefix.
    
    Your DHCPv6 code point doesn't tell the CPE which protocol to use. Worse, you
    could send the prefix directly in DHCPv6 avoiding the need to run RFC7050 or
    RFC7225 in the first place.

Yes, it tells the CE which ones are available. See section 1.4/1.5 of RFC8026. The operator code what transition mechanism (even several ones if available and in order of preference), in the S46 priority option. The CE then uses the first one that match with the list of transition mechanisms available in the CE.

    
    Note that there are multiple ways to have per customer DNS resolvers settings.
    One option is to vary the addresses of the DNS resolvers assigned to a
    particular link. Another is the use of ACLs in a DNS resolver to give
    different views to different devices.

Right, but again, you're assuming that in addition to NAT64, DNS64 is being used, which is not necessarily the case for 464XLAT (in order to avoid breaking DNSSEC). You're also missing the point that the customer may have changed the DNS, so this doesn't work in that case.
    
    So the drawback of your proposal is that everybody (both CPE vendors and
    operators) has to implement the DHCPv6 option, only for the benefit of those
    operators that want to mix and match customers without resorting to other
    mechanisms.

CE vendors will implement this anyway, if they want to follow this document and support other mechanism (not just for 464XLAT, but for the others). So actually, by making a single mechanism (RFC8026) to allow to sort out what are the transition mechanism to be used, it is much simpler. Operators only will need to use that parameter (not a new development, is only a parameter in the DHCP server config if it supports already RFC8026 for the other mechanisms).
    
    Personally I think that if you would make it mandatory for a CPE to issue a
    DHCPv6 request to find out about NAT64, then at least return the prefix as
    well.

This was proposed, a few times in int-area, but people don't like "new" DHCP protocols, because they said that it can be done with RFC7050 or RFC7225. I don't agree with that (so I will agree with you and that was my contribution to https://datatracker.ietf.org/meeting/98/materials/slides-98-intarea-dhcpv6-options-for-discovery-nat64-prefixes-00), but anyway going back to that way and discussing for years, means meanwhile, we will need a more complex mechanism instead of defining a new option code for an existing protocol (RFC8026). This is something that is being done, I believe, from time to time in IETF documents.
    
    



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Cc: Bob Hinden <bob.hinden@gmail.com>, IPv6 Operations <v6ops@ietf.org>, =?utf-8?Q?Vost=C5=99ez_Radek?= <vostrez@oikt.czu.cz>, Tomas Horacek <THoracek@totalservice.cz>
To: Brian Carpenter <brian.e.carpenter@gmail.com>
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It=E2=80=99s always great in the IETF to see the running code of an RFC.

Bob


> On Jun 10, 2018, at 1:09 PM, Brian E Carpenter =
<brian.e.carpenter@gmail.com> wrote:
>=20
> Hi,
>=20
> Another important step in IPv6 deployment has occurred.
>=20
> (The video is in Czech but the demo at the end is easy to understand.)
>=20
> Forwarded with permission.
>=20
>    Brian
>=20
> -------- Forwarded Message --------
> Subject: Re: RFC6214
> Date: Wed, 6 Jun 2018 15:34:27 +0000
> From: Tomas Horacek <THoracek@totalservice.cz>
> To: Bob Hinden <bob.hinden@gmail.com>
> CC: Brian Carpenter <brian.e.carpenter@gmail.com>, Vost=C5=99ez Radek =
<vostrez@oikt.czu.cz>
>=20
>=20
> Hello Bob and Brian.
>=20
>=20
> We did it, we have implemented your RFC6214 !
>=20
> Its 6.6. today, the day when IPv6 seminar takes place here in Prague: =
https://www.cesnet.cz/akce/ipv6-2018/. We have presented our RFC6214 =
implementation there with great success.
>=20
> The info, video is not yet available in English (only in Czech, sry).
>=20
>=20
> Video: https://www.youtube.com/watch?v=3DGTFXkXp_pig
>=20
> WebPage: https://www.rfc6214.com/ -> =
https://translate.google.com/translate?hl=3Den&sl=3Dauto&tl=3Den&u=3Dhttps=
%3A%2F%2Frfc6214.com<https://www.rfc6214.com>
>=20
>=20
> Have a nice day :).
>=20
> ________________________________
> From: Tomas Horacek
> Sent: Wednesday, May 2, 2018 4:03 PM
> To: Bob Hinden
> Cc: Brian Carpenter
> Subject: Re: RFC6214
>=20
>=20
>=20
> Thank you Bob for your quick reply.
>=20
>=20
> We are aware of the publishing date :-).
>=20
>=20
> S pozdravem / Best regards
>=20
>=20
> Tom=C3=A1=C5=A1 Hor=C3=A1=C4=8Dek
> [https://portal.totalservice.cz/AV_logo_all.jpg]
>=20
> LAN/WAN security supervisor
>=20
> M:  +420 731 450 906
>=20
>=20
>=20
> thoracek@totalservice.cz<mailto:thoracek@totalservice.cz>
>=20
>=20
>=20
> TOTAL SERVICE s.r.o.
>=20
>=20
>=20
>=20
> U Uranie 954/18
>=20
> T:  +420 270 002 811
>=20
>=20
> 170 00 Praha 7 Czech Republic
>=20
> www.totalservice.cz<http://www.totalservice.cz>
>=20
>=20
> INFORMACE: Tato zpr=C3=A1va a p=C5=99ipojen=C3=A9 p=C5=99=C3=ADlohy =
jsou ur=C4=8Deny v=C3=BDhradn=C4=9B v n=C3=AD uveden=C3=A9mu p=C5=99=C3=AD=
jemci a mohou obsahovat d=C5=AFv=C4=9Brn=C3=A9, osobn=C3=AD nebo =
chr=C3=A1n=C4=9Bn=C3=A9 informace. Pokud jste tuto zpr=C3=A1vu obdr=C5=BEe=
li omylem nebo nedopat=C5=99en=C3=ADm, uv=C4=9Bdomte, pros=C3=ADm, =
odes=C3=ADlatele a sma=C5=BEte tuto zpr=C3=A1vu. Tato zpr=C3=A1va nen=C3=AD=
 n=C3=A1vrhem na uzav=C5=99en=C3=AD smlouvy ani jeho p=C5=99ijet=C3=ADm, =
leda=C5=BEe je tak v textu v=C3=BDslovn=C4=9B uvedeno. P=C5=99ijet=C3=AD =
jak=C3=A9koliv nab=C3=ADdky nebo dokon=C4=8Den=C3=AD jedn=C3=A1n=C3=AD =
je =C3=BA=C4=8Dinn=C3=A9 v=C3=BDhradn=C4=9B uzav=C5=99en=C3=ADm =
p=C3=ADsemn=C3=A9 smlouvy podepsan=C3=A9 statut=C3=A1rn=C3=ADm org=C3=A1ne=
m nebo jinou opr=C3=A1vn=C4=9Bnou =C4=8Di p=C3=ADsemn=C4=9B pov=C4=9B=C5=99=
enou osobou.
>=20
>=20
> ________________________________
> From: Bob Hinden <bob.hinden@gmail.com>
> Sent: Wednesday, May 2, 2018 3:44 PM
> To: Tomas Horacek
> Cc: Bob Hinden; Brian Carpenter
> Subject: Re: RFC6214
>=20
> Tomas,
>=20
> I am not aware of any implementations.
>=20
> Please look carefully at the date this RFC was published :-)
>=20
> Bob
>=20
>> On May 2, 2018, at 8:41 AM, Tomas Horacek <THoracek@totalservice.cz> =
wrote:
>>=20
>>=20
>> Hello there Robert,
>> I am very sorry to interrupt you.
>>=20
>> I just wanted to ask, is there yet real-life implementation of your =
RFC6214 ?
>>=20
>> If so, can you please share a link or a contact to the person/group =
that implemented it ?
>> If not, can you please give a advice, if any ?
>>=20
>> Thank you for your time, patience, understanding. And thank you in =
advance for your reply.
>>=20
>> :-)
>>=20
>> S pozdravem / Best regards
>>=20
>> Tom=C3=A1=C5=A1 Hor=C3=A1=C4=8Dek
>>=20
>>=20
>> LAN/WAN security supervisor
>> M:  +420 731 450 906
>> thoracek@totalservice.cz
>>=20
>> TOTAL SERVICE s.r.o.
>>=20
>> U Uranie 954/18
>> T:  +420 270 002 811
>> 170 00 Praha 7 Czech Republic
>> www.totalservice.cz<http://www.totalservice.cz>
>> INFORMACE: Tato zpr=C3=A1va a p=C5=99ipojen=C3=A9 p=C5=99=C3=ADlohy =
jsou ur=C4=8Deny v=C3=BDhradn=C4=9B v n=C3=AD uveden=C3=A9mu p=C5=99=C3=AD=
jemci a mohou obsahovat d=C5=AFv=C4=9Brn=C3=A9, osobn=C3=AD nebo =
chr=C3=A1n=C4=9Bn=C3=A9 informace. Pokud jste tuto zpr=C3=A1vu obdr=C5=BEe=
li omylem nebo nedopat=C5=99en=C3=ADm, uv=C4=9Bdomte, pros=C3=ADm, =
odes=C3=ADlatele a sma=C5=BEte tuto zpr=C3=A1vu. Tato zpr=C3=A1va nen=C3=AD=
 n=C3=A1vrhem na uzav=C5=99en=C3=AD smlouvy ani jeho p=C5=99ijet=C3=ADm, =
leda=C5=BEe je tak v textu v=C3=BDslovn=C4=9B uvedeno. P=C5=99ijet=C3=AD =
jak=C3=A9koliv nab=C3=ADdky nebo dokon=C4=8Den=C3=AD jedn=C3=A1n=C3=AD =
je =C3=BA=C4=8Dinn=C3=A9 v=C3=BDhradn=C4=9B uzav=C5=99en=C3=ADm =
p=C3=ADsemn=C3=A9 smlouvy podepsan=C3=A9 statut=C3=A1rn=C3=ADm org=C3=A1ne=
m nebo jinou opr=C3=A1vn=C4=9Bnou =C4=8Di p=C3=ADsemn=C4=9B pov=C4=9B=C5=99=
enou osobou.
>=20
>=20
>=20
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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From nobody Mon Jun 11 09:37:16 2018
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In-reply-to: Your message of "Mon, 11 Jun 2018 16:05:33 +0200 ." <980A4003-336C-4B99-BFD2-725B261F40BA@consulintel.es> 
Date: Mon, 11 Jun 2018 18:36:56 +0200
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/CSENFuSqLA_fLj6v9t0Ea69O1RE>
Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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>Right, but again, you're assuming that in addition to NAT64, DNS64 is being us
>ed, which is not necessarily the case for 464XLAT (in order to avoid breaking 
>DNSSEC). You're also missing the point that the customer may have changed the 
>DNS, so this doesn't work in that case.

Thinking about this a bit more, not so much DNSSEC, but how DNS64 can break
things.

It is safe to assume that DNS64 will be used only in combination with NAT64.
I.e., if an operator wants to provide a CPE with dual stack or any other
transition mechanism, there won't be DNS64.

This means that if a CPE finds DNS64, then it can safely assume that there is
NAT64. No need for a DHCP option.

I guess that if a CPE requests a PCP Server Option using DHCPv6, then it
would also make sense to request the S46 Priority Option as well. But only
in that case.



From nobody Mon Jun 11 09:59:25 2018
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: V6ops Chairs <v6ops-chairs@ietf.org>, "v6ops@ietf.org list" <v6ops@ietf.org>
Thread-Topic: [v6ops] IETF 102 Agenda
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Date: Mon, 11 Jun 2018 16:59:07 +0000
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Subject: Re: [v6ops] IETF 102 Agenda
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Hi Fred,

'draft-templin-v6ops-pdhost' has been updated, and received list traffic bo=
th
before and after the update was posted. Please add to the agenda.

Thanks - Fred

> -----Original Message-----
> From: v6ops [mailto:v6ops-bounces@ietf.org] On Behalf Of Fred Baker
> Sent: Friday, June 08, 2018 5:59 PM
> To: v6ops@ietf.org list <v6ops@ietf.org>
> Subject: [v6ops] IETF 102 Agenda
>=20
> Permit me to comment on the IETF 102 agenda as it appears to be shaping u=
p.
>=20
> We have
>  - an invited talk by George Michaelson of APNIC, who has been looking at=
 IPv6 traffic in world economies
>    (You might find the observations surprising; hint, guess which economy=
 has the most IPv6 traffic? Which markets?)
>  - draft-ietf-v6ops-transition-ipv4aas
>  - draft-ietf-v6ops-ipv6rtr-reqs
>=20
> draft-ietf-v6ops-conditional-ras is under discussion in the IESG, and is =
waiting for draft-ietf-rtgwg-enterprise-pa-multihoming before
> proceeding. We have several other individual contributions, and have disc=
ussed most of them on the list since IETF 101. The chairs
> don't see a supporting interest level in them at this time.
>=20
> We have two slots, two hours each, at IETF 102. The chairs are right now =
contemplating using one a slot for those three topics and
> perhaps a set of lightning talks, and letting the second slot go.
>=20
> To change that, we need to see new drafts (e.g., new content) and support=
ing list traffic.
>=20
> Your turn...


From nobody Mon Jun 11 10:15:30 2018
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Date: Mon, 11 Jun 2018 19:15:21 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Philip Homburg <pch-v6ops-8@u-1.phicoh.com>, <v6ops@ietf.org>
Message-ID: <D327A7C2-4ECC-417A-AC29-25A0573FDF6C@consulintel.es>
Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <m1fSMYD-0000FrC@stereo.hq.phicoh.net> <1E283759-AB5E-4D0A-A6E6-2A06B95E7D6C@consulintel.es> <m1fSNAr-0000FDC@stereo.hq.phicoh.net> <980A4003-336C-4B99-BFD2-725B261F40BA@consulintel.es> <m1fSPoO-0000FqC@stereo.hq.phicoh.net>
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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I see your point, but what an operator need is a "100% sure" way to make su=
re that they can tell the CPE to not use a specific transition mechanism (w=
hich for the other mechanisms we have with RFC8026).

So, assuming that DNS64 is only there if combined with NAT64 is not "safe 1=
00%" because if using CLAT, you can avoid having a DNS64 (this is the one t=
hat breaks DNSSEC, in case I wrote it incorrectly before).

But if the user changed the DNS in the CPE (which is quite common), there w=
ill not be DNS64 and still may be the ISP want to have the CLAT running, be=
cause is using that for the IPv4 service for that particular customer.

If you agree that the CPE may request a PCP option, etc., then request the =
S46, I think you are in agreement that we need the S46 priority option code=
s for all the mechanism that we are asking to be supported by the CPE, righ=
t?

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: <pch-bCE2691D2@u-1.phicoh.com> en nombre de Philip Homburg <pch-v6ops-8=
@u-1.phicoh.com>
Fecha: lunes, 11 de junio de 2018, 18:37
Para: <v6ops@ietf.org>
CC: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas=20

    >Right, but again, you're assuming that in addition to NAT64, DNS64 is =
being us
    >ed, which is not necessarily the case for 464XLAT (in order to avoid b=
reaking=20
    >DNSSEC). You're also missing the point that the customer may have chan=
ged the=20
    >DNS, so this doesn't work in that case.
   =20
    Thinking about this a bit more, not so much DNSSEC, but how DNS64 can b=
reak
    things.
   =20
    It is safe to assume that DNS64 will be used only in combination with N=
AT64.
    I.e., if an operator wants to provide a CPE with dual stack or any othe=
r
    transition mechanism, there won't be DNS64.
   =20
    This means that if a CPE finds DNS64, then it can safely assume that th=
ere is
    NAT64. No need for a DHCP option.
   =20
    I guess that if a CPE requests a PCP Server Option using DHCPv6, then i=
t
    would also make sense to request the S46 Priority Option as well. But o=
nly
    in that case.
   =20
   =20
   =20



**********************************************
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Are you ready for the new Internet ?
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The IPv6 Company

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To: Fred Templin <Fred.L.Templin@boeing.com>
References: <74F1C837-D187-48EF-9804-E7DCDD7DF14D@gmail.com> <3c985cdd540948f29d92ee30f497988b@XCH15-06-08.nw.nos.boeing.com>
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On Jun 11, 2018, at 9:59 AM, Templin (US), Fred L =
<Fred.L.Templin@boeing.com> wrote:
> Hi Fred,
>=20
> 'draft-templin-v6ops-pdhost' has been updated, and received list =
traffic both
> before and after the update was posted. Please add to the agenda.
>=20
> Thanks - Fred

Hi. I'm looking at the discussion post-IETF-101, and looking for someone =
saying "I support this draft. I think it describes something I want to =
deploy in my network." This is an operational working group; I'm looking =
especially for comments from network operators. This is a discussion you =
and I have had a number of times. What the chairs want to give agenda =
time to is drafts that the working group participants find useful and =
interesting. We gauge that from list discussion. So it's not "number of =
comments, when comments are specifically solicited, exceed zero", but =
"someone said it was useful and interesting in their deployment".

Since IETF 101, we have had two threads on the subject of pdhost. I =
initiated "let's discuss this" in late April: =
https://www.ietf.org/mail-archive/web/v6ops/current/msg29222.html.

In that thread, we had comments from
  - Dusan Medric, who wondered whether there was a discussion of =
allocating a prefix (such as a /64) to a host,
  - Joe Touch, Mark Smith, and Ole Troan regarding the distinction a =
"weak" and a "strong" host and between a "platform", a "router", a =
"host", and a "node", and
  - Alexandre Petrescu, on the utility in his IOT MIPv6 network.

I initiated another after your update on 29 May =
(https://www.ietf.org/mail-archive/web/v6ops/current/msg29275.html). In =
that, you and Alexandre Petrescu discussed the utility of this in his =
IOT environment, in which he wanted to use RFC 3633 to delegate a prefix =
to an IOT router for use in an enclave in his network. You and he =
disagreed on what was to be done with the delegated prefix.

I'm still looking for a comment from a working group participant saying =
s/he finds draft-templin-v6ops-pdhost, in its 21st revision, "useful and =
interesting". What I see is 14 emails since IETF 101, many of which you =
responded to, from people who fundamentally disagreed with you on one =
point or another.

General comment to those on the CC line: if this draft describes =
something useful to you in your network, your comment can dramatically =
change the conversation between Fred and myself.

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From nobody Mon Jun 11 12:14:52 2018
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Date: Mon, 11 Jun 2018 21:14:42 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "v6ops@ietf.org list" <v6ops@ietf.org>
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Thread-Topic: [v6ops] IETF 102 Agenda
References: <74F1C837-D187-48EF-9804-E7DCDD7DF14D@gmail.com> <3c985cdd540948f29d92ee30f497988b@XCH15-06-08.nw.nos.boeing.com> <503C593F-882B-4DB0-B204-CFE5EDA7FA13@gmail.com>
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I'm sure in March I confirmed that I will like to see this work as WG item,=
 but can't find my email ...

Anyway, I just read the last version, and again, I confirm that I believe i=
t is useful and will like to see this work to progress as WG item.

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: v6ops <v6ops-bounces@ietf.org> en nombre de Fred Baker <fredbaker.ietf@=
gmail.com>
Fecha: lunes, 11 de junio de 2018, 20:47
Para: Fred Templin <Fred.L.Templin@boeing.com>
CC: "v6ops@ietf.org list" <v6ops@ietf.org>
Asunto: Re: [v6ops] IETF 102 Agenda

    On Jun 11, 2018, at 9:59 AM, Templin (US), Fred L <Fred.L.Templin@boein=
g.com> wrote:
    > Hi Fred,
    >=20
    > 'draft-templin-v6ops-pdhost' has been updated, and received list traf=
fic both
    > before and after the update was posted. Please add to the agenda.
    >=20
    > Thanks - Fred
   =20
    Hi. I'm looking at the discussion post-IETF-101, and looking for someon=
e saying "I support this draft. I think it describes something I want to de=
ploy in my network." This is an operational working group; I'm looking espe=
cially for comments from network operators. This is a discussion you and I =
have had a number of times. What the chairs want to give agenda time to is =
drafts that the working group participants find useful and interesting. We =
gauge that from list discussion. So it's not "number of comments, when comm=
ents are specifically solicited, exceed zero", but "someone said it was use=
ful and interesting in their deployment".
   =20
    Since IETF 101, we have had two threads on the subject of pdhost. I ini=
tiated "let's discuss this" in late April: https://www.ietf.org/mail-archiv=
e/web/v6ops/current/msg29222.html.
   =20
    In that thread, we had comments from
      - Dusan Medric, who wondered whether there was a discussion of alloca=
ting a prefix (such as a /64) to a host,
      - Joe Touch, Mark Smith, and Ole Troan regarding the distinction a "w=
eak" and a "strong" host and between a "platform", a "router", a "host", an=
d a "node", and
      - Alexandre Petrescu, on the utility in his IOT MIPv6 network.
   =20
    I initiated another after your update on 29 May (https://www.ietf.org/m=
ail-archive/web/v6ops/current/msg29275.html). In that, you and Alexandre Pe=
trescu discussed the utility of this in his IOT environment, in which he wa=
nted to use RFC 3633 to delegate a prefix to an IOT router for use in an en=
clave in his network. You and he disagreed on what was to be done with the =
delegated prefix.
   =20
    I'm still looking for a comment from a working group participant saying=
 s/he finds draft-templin-v6ops-pdhost, in its 21st revision, "useful and i=
nteresting". What I see is 14 emails since IETF 101, many of which you resp=
onded to, from people who fundamentally disagreed with you on one point or =
another.
   =20
    General comment to those on the CC line: if this draft describes someth=
ing useful to you in your network, your comment can dramatically change the=
 conversation between Fred and myself.
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.




From nobody Mon Jun 11 12:48:26 2018
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Fred Baker <fredbaker.ietf@gmail.com>
CC: "v6ops@ietf.org list" <v6ops@ietf.org>
Thread-Topic: [v6ops] IETF 102 Agenda
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Date: Mon, 11 Jun 2018 19:48:16 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/oAGUchFQ1X1eKAX5gGzpB2VIceU>
Subject: Re: [v6ops] IETF 102 Agenda
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Hi Fred,

There was a similar question back in the March 2018 timeframe, and there we=
re
several responses in support. The document was then presented remotely at
IETF101, but there was no time left over for questions afterwards.

I am planning to attend IETF102 in person, so would be better able to inter=
act
and get  a sense of the room.

Thanks - Fred

> -----Original Message-----
> From: Fred Baker [mailto:fredbaker.ietf@gmail.com]
> Sent: Monday, June 11, 2018 11:47 AM
> To: Templin (US), Fred L <Fred.L.Templin@boeing.com>
> Cc: v6ops@ietf.org list <v6ops@ietf.org>
> Subject: Re: [v6ops] IETF 102 Agenda
>=20
> On Jun 11, 2018, at 9:59 AM, Templin (US), Fred L <Fred.L.Templin@boeing.=
com> wrote:
> > Hi Fred,
> >
> > 'draft-templin-v6ops-pdhost' has been updated, and received list traffi=
c both
> > before and after the update was posted. Please add to the agenda.
> >
> > Thanks - Fred
>=20
> Hi. I'm looking at the discussion post-IETF-101, and looking for someone =
saying "I support this draft. I think it describes something I
> want to deploy in my network." This is an operational working group; I'm =
looking especially for comments from network operators.
> This is a discussion you and I have had a number of times. What the chair=
s want to give agenda time to is drafts that the working group
> participants find useful and interesting. We gauge that from list discuss=
ion. So it's not "number of comments, when comments are
> specifically solicited, exceed zero", but "someone said it was useful and=
 interesting in their deployment".
>=20
> Since IETF 101, we have had two threads on the subject of pdhost. I initi=
ated "let's discuss this" in late April:
> https://www.ietf.org/mail-archive/web/v6ops/current/msg29222.html.
>=20
> In that thread, we had comments from
>   - Dusan Medric, who wondered whether there was a discussion of allocati=
ng a prefix (such as a /64) to a host,
>   - Joe Touch, Mark Smith, and Ole Troan regarding the distinction a "wea=
k" and a "strong" host and between a "platform", a "router",
> a "host", and a "node", and
>   - Alexandre Petrescu, on the utility in his IOT MIPv6 network.
>=20
> I initiated another after your update on 29 May (https://www.ietf.org/mai=
l-archive/web/v6ops/current/msg29275.html). In that, you
> and Alexandre Petrescu discussed the utility of this in his IOT environme=
nt, in which he wanted to use RFC 3633 to delegate a prefix to
> an IOT router for use in an enclave in his network. You and he disagreed =
on what was to be done with the delegated prefix.
>=20
> I'm still looking for a comment from a working group participant saying s=
/he finds draft-templin-v6ops-pdhost, in its 21st revision,
> "useful and interesting". What I see is 14 emails since IETF 101, many of=
 which you responded to, from people who fundamentally
> disagreed with you on one point or another.
>=20
> General comment to those on the CC line: if this draft describes somethin=
g useful to you in your network, your comment can
> dramatically change the conversation between Fred and myself.


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From: Simon Allard <Simon.Allard@vocusgroup.co.nz>
To: "v6ops@ietf.org" <v6ops@ietf.org>, "fredbaker.ietf@gmail.com" <fredbaker.ietf@gmail.com>
CC: "intarea-chairs@ietf.org" <intarea-chairs@ietf.org>
Thread-Topic: [v6ops] draft-patterson-intarea-ipoe-health
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/IrznEu9xkzgwTjDG4oZEgZJi_DI>
Subject: Re: [v6ops] draft-patterson-intarea-ipoe-health
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This is a multi-part message in MIME format.

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Hi Fred

IPoE Health is something we have struggled with. We are a NZ based ISP with=
 a large IPoE customer base.

We are currently running our BNG's with 5 minute lease timers to try and ge=
t around the issue where the BNG declares the subscriber as dead and kills =
the session, however the client remains online until the lease expires.

We have had discussions with our CPE vendors around arp detection/resetting=
 DHCP however those conversations have not gone well, with the CPE vendor s=
aying that ARP and DHCP are 2 different things and can't be mixed. We also =
looked at doing something similar with DNS (3 DNS request fail and it turns=
 DHCP into discovery mode), and BFD but nothing really got passed the white=
board discussions phase.

If there was an accepted RFC we could point the vendors at, it would make t=
hose discussions much easier.

Cheers,
Simon
AS9790


Simon Allard | Development & Operations Manager
D: +64 9 550 2790E: Simon.Allard@vocusgroup.co.nz
M: +64 20 1000 790W: vocusgroup.co.nz
A: Level 2, 1-7 The Strand, Takapuna 0622

---------- Forwarded message ---------
From: Fred Baker <fredbaker.ietf@gmail.com>
Date: Sat, 9 Jun 2018 at 22:58
Subject: [v6ops] draft-patterson-intarea-ipoe-health
To: <v6ops@ietf.org>
Cc: <intarea-chairs@ietf.org>


Looking for comments on draft-patterson-intarea-ipoe-health-00. The authors=
 would like to discuss it in v6ops at IETF 102 (Montreal). Do folks find it=
 interesting/useful?

The primary working group for this will be intarea, for reasons related to =
the charter. However, it would be useful to know that the problem is a gene=
ral one, and get comments on the proposed solution.

Sent from my iPad
_______________________________________________
v6ops mailing list
v6ops@ietf.org
https://www.ietf.org/mailman/listinfo/v6ops

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3Dutf-8" /></head><body><div>Hi Fred<br /><br />IPoE Health is something w=
e have struggled with. We are a NZ based ISP with a large IPoE customer bas=
e.<br /><br />We are currently running our BNG&#39;s with 5 minute lease ti=
mers to try and get around the issue where the BNG declares the subscriber =
as dead and kills the session, however the client remains online until the =
lease expires.<br /><br />We have had discussions with our CPE vendors arou=
nd arp detection/resetting DHCP however those conversations have not gone w=
ell, with the CPE vendor saying that ARP and DHCP are 2 different things an=
d can&#39;t be mixed. We also looked at doing something similar with DNS (3=
 DNS request fail and it turns DHCP into discovery mode), and BFD but nothi=
ng really got passed the whiteboard discussions phase.<br /><br />If there =
was an accepted RFC we could point the vendors at, it would make those disc=
ussions much easier.<br /><br />Cheers,<br />Simon<br />AS9790<br /><br /><=
div style=3D"mso-line-height-rule:exactly;-webkit-text-size-adjust:100%;"><=
br /><table cellpadding=3D"0" cellspacing=3D"0" border=3D"0" style=3D"backg=
round-color:#FFFFFF;border-collapse:collapse;font-size:0;line-height:18.33p=
x;"><tr><td align=3D"left" style=3D"padding:0 0 15px;vertical-align:top;"><=
table cellpadding=3D"0" cellspacing=3D"0" border=3D"0" style=3D"border-coll=
apse:collapse;font-size:14.67px;color:#808080;font-style:normal;font-weight=
:bold;white-space:nowrap;text-decoration:none;"><tr><td align=3D"left" styl=
e=3D"vertical-align:top;text-align:left;color:#065897;font-family:Helvetica=
,Helvetica Neue,Arial,sans-serif;">Simon&nbsp;Allard<span style=3D"font-fam=
ily:remialcxesans;">=E2=80=8B</span></td><td align=3D"left" style=3D"vertic=
al-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,san=
s-serif;font-weight:normal;white-space:normal;">&nbsp;|&nbsp;</td><td align=
=3D"left" style=3D"vertical-align:top;text-align:left;font-family:Helvetica=
,Helvetica Neue,Arial,sans-serif;">Development&nbsp;&amp;&nbsp;Operations&n=
bsp;Manager</td></tr></table></td></tr><tr style=3D"line-height:13.33px;"><=
td align=3D"left" style=3D"padding:0 0 10px;vertical-align:top;"><table cel=
lpadding=3D"0" cellspacing=3D"0" border=3D"0" style=3D"border-collapse:coll=
apse;font-size:0;"><tr><td align=3D"left" style=3D"vertical-align:top;"><ta=
ble cellpadding=3D"0" cellspacing=3D"0" border=3D"0" style=3D"border-collap=
se:collapse;font-size:10.66px;color:#065897;font-style:normal;font-weight:n=
ormal;white-space:nowrap;text-decoration:none;"><tr><td align=3D"left" styl=
e=3D"vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neu=
e,Arial,sans-serif;font-weight:bold;">D:&nbsp;</td><td align=3D"left" style=
=3D"vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Neue=
,Arial,sans-serif;"><a href=3D"tel:+64%209%20550%202790" target=3D"_blank" =
id=3D"LPlnk689713" style=3D"color:#808080;text-decoration:none;"><strong st=
yle=3D"font-weight:normal;">+64&nbsp;9&nbsp;550&nbsp;2790</strong></a></td>=
<td align=3D"left" style=3D"vertical-align:top;text-align:left;color:#80808=
0;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;white-space:normal;=
">&nbsp;</td><td align=3D"left" style=3D"vertical-align:top;text-align:left=
;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:bold;">E=
:&nbsp;</td><td align=3D"left" style=3D"vertical-align:top;text-align:left;=
font-family:Helvetica,Helvetica Neue,Arial,sans-serif;"><a href=3D"mailto:S=
imon.Allard@vocusgroup.co.nz" target=3D"_blank" id=3D"LPlnk689713" style=
=3D"color:#808080;text-decoration:underline;"><strong style=3D"font-weight:=
normal;">Simon.Allard@vocusgroup.co.nz</strong></a></td></tr></table></td><=
/tr><tr><td align=3D"left" style=3D"vertical-align:top;"><table cellpadding=
=3D"0" cellspacing=3D"0" border=3D"0" style=3D"border-collapse:collapse;fon=
t-size:10.66px;color:#065897;font-style:normal;font-weight:normal;white-spa=
ce:nowrap;text-decoration:none;"><tr><td align=3D"left" style=3D"vertical-a=
lign:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-se=
rif;font-weight:bold;">M:&nbsp;</td><td align=3D"left" style=3D"vertical-al=
ign:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-ser=
if;"><a href=3D"tel:+64%2020%201000%20790" target=3D"_blank" id=3D"LPlnk689=
713" style=3D"color:#808080;text-decoration:none;"><strong style=3D"font-we=
ight:normal;">+64&nbsp;20&nbsp;1000&nbsp;790</strong></a></td><td align=3D"=
left" style=3D"vertical-align:top;text-align:left;color:#808080;font-family=
:Helvetica,Helvetica Neue,Arial,sans-serif;white-space:normal;">&nbsp;&nbsp=
;</td><td align=3D"left" style=3D"vertical-align:top;text-align:left;font-f=
amily:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:bold;">W:&nbsp;=
</td><td align=3D"left" style=3D"vertical-align:top;text-align:left;font-fa=
mily:Helvetica,Helvetica Neue,Arial,sans-serif;"><a href=3D"http://vocusgro=
up.co.nz" target=3D"_blank" id=3D"LPlnk689713" style=3D"color:#808080;text-=
decoration:underline;"><strong style=3D"font-weight:normal;">vocusgroup.co.=
nz</strong></a></td></tr></table></td></tr><tr><td align=3D"left" style=3D"=
vertical-align:top;"><table cellpadding=3D"0" cellspacing=3D"0" border=3D"0=
" style=3D"border-collapse:collapse;font-size:10.66px;color:#065897;font-st=
yle:normal;font-weight:normal;white-space:nowrap;text-decoration:none;"><tr=
><td align=3D"left" style=3D"vertical-align:top;text-align:left;font-family=
:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:bold;">A:&nbsp;</td>=
<td align=3D"left" style=3D"vertical-align:top;text-align:left;color:#80808=
0;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;">Level&nbsp;2,&nbs=
p;1-7&nbsp;The&nbsp;Strand,&nbsp;Takapuna&nbsp;0622</td></tr></table></td><=
/tr></table></td></tr><tr style=3D"line-height:normal;"><td align=3D"left" =
style=3D"padding:0 0 10px;vertical-align:top;"><table cellpadding=3D"0" cel=
lspacing=3D"0" border=3D"0" style=3D"border-collapse:collapse;font-size:0;"=
><tr><td align=3D"center" style=3D"vertical-align:middle;"><a href=3D"http:=
//www.vocusgroup.co.nz" target=3D"_blank" id=3D"LPlnk689713" style=3D"text-=
decoration:none;"><img src=3D"cid:image664000.png@C943D0BF.53071B46" width=
=3D"340" height=3D"75" border=3D"0" alt=3D"" style=3D"min-width:340px;font-=
size:0;" /></a></td></tr></table></td></tr></table><br /></div>---------- F=
orwarded message ---------<br />From: Fred Baker &lt;fredbaker.ietf@gmail.c=
om&gt;<br />Date: Sat, 9 Jun 2018 at 22:58<br />Subject: [v6ops] draft-patt=
erson-intarea-ipoe-health<br />To: &lt;v6ops@ietf.org&gt;<br />Cc: &lt;inta=
rea-chairs@ietf.org&gt;<br /><br /><br />Looking for comments on draft-patt=
erson-intarea-ipoe-health-00. The authors would like to discuss it in v6ops=
 at IETF 102 (Montreal). Do folks find it interesting/useful?<br /><br />Th=
e primary working group for this will be intarea, for reasons related to th=
e charter. However, it would be useful to know that the problem is a genera=
l one, and get comments on the proposed solution.<br /><br />Sent from my i=
Pad<br />_______________________________________________<br />v6ops mailing=
 list<br />v6ops@ietf.org<br />https://www.ietf.org/mailman/listinfo/v6ops<=
br /></div></body></html>
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From nobody Mon Jun 11 15:05:21 2018
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From: Job Snijders <job@ntt.net>
Date: Mon, 11 Jun 2018 22:05:15 +0000
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To: Simon Allard <Simon.Allard=40vocusgroup.co.nz@dmarc.ietf.org>
Cc: "v6ops@ietf.org" <v6ops@ietf.org>, "fredbaker.ietf@gmail.com" <fredbaker.ietf@gmail.com>,  "intarea-chairs@ietf.org" <intarea-chairs@ietf.org>, draft-patterson-intarea-ipoe-health@ietf.org
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Subject: Re: [v6ops] draft-patterson-intarea-ipoe-health
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Content-Type: text/plain; charset="UTF-8"

I agree there is an issue, multiple access providers confirmed they are
making (never great) trade-offs between the lease periods and potential
downtime for customers.

I think the proposed solution is interesting in that it seems quite
manageable to retrofit this in existing deployments through a software
update and avoiding the introduction of new protocols. This may not be the
approach with the most technical elegance and sophistication, but is
perhaps "just good enough" for the problem at hand. IETF yearns for
feedback from operators, and this draft is exactly that.

I encourage the authors to produce running code and run some trials to
validate the idea. It'll be hard to argue with proven ideas :-)

Kind regards,

Job

--000000000000cc244a056e64f1bf
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<div dir=3D"ltr"><div class=3D"gmail_extra">I agree there is an issue, mult=
iple access providers confirmed they are making (never great) trade-offs be=
tween the lease periods and potential downtime for customers.</div><div cla=
ss=3D"gmail_extra"><br></div><div class=3D"gmail_extra">I think the propose=
d solution is interesting in that it seems quite manageable to retrofit thi=
s in existing deployments through a software update and avoiding the introd=
uction of new protocols. This may not be the approach with the most technic=
al elegance and sophistication, but is perhaps &quot;just good enough&quot;=
 for the problem at hand. IETF yearns for feedback from operators, and this=
 draft is exactly that.</div><div class=3D"gmail_extra"><br></div><div clas=
s=3D"gmail_extra">I encourage the authors to produce running code and run s=
ome trials to validate the idea. It&#39;ll be hard to argue with proven ide=
as :-)</div><div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra"=
>Kind regards,</div><div class=3D"gmail_extra"><br>Job</div></div>

--000000000000cc244a056e64f1bf--


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To: Simon Allard <Simon.Allard@vocusgroup.co.nz>
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Subject: Re: [v6ops] draft-patterson-intarea-ipoe-health
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Thanks, Simon. This is being pursued in int-area, as it will require a =
DHCP change. However, it is an operational issue, which is where v6ops =
comes in.

> On Jun 11, 2018, at 2:45 PM, Simon Allard =
<Simon.Allard@vocusgroup.co.nz> wrote:
>=20
> Hi Fred
>=20
> IPoE Health is something we have struggled with. We are a NZ based ISP =
with a large IPoE customer base.
>=20
> We are currently running our BNG's with 5 minute lease timers to try =
and get around the issue where the BNG declares the subscriber as dead =
and kills the session, however the client remains online until the lease =
expires.
>=20
> We have had discussions with our CPE vendors around arp =
detection/resetting DHCP however those conversations have not gone well, =
with the CPE vendor saying that ARP and DHCP are 2 different things and =
can't be mixed. We also looked at doing something similar with DNS (3 =
DNS request fail and it turns DHCP into discovery mode), and BFD but =
nothing really got passed the whiteboard discussions phase.
>=20
> If there was an accepted RFC we could point the vendors at, it would =
make those discussions much easier.
>=20
> Cheers,
> Simon
> AS9790
>=20
>=20
> Simon Allard=E2=80=8B	 | 	Development & Operations Manager
> D: 	+64 9 550 2790	 	E: 	Simon.Allard@vocusgroup.co.nz
> M: 	+64 20 1000 790	  	W: 	vocusgroup.co.nz
> A: 	Level 2, 1-7 The Strand, Takapuna 0622
> <image664000.png>
>=20
> ---------- Forwarded message ---------
> From: Fred Baker <fredbaker.ietf@gmail.com>
> Date: Sat, 9 Jun 2018 at 22:58
> Subject: [v6ops] draft-patterson-intarea-ipoe-health
> To: <v6ops@ietf.org>
> Cc: <intarea-chairs@ietf.org>
>=20
>=20
> Looking for comments on draft-patterson-intarea-ipoe-health-00. The =
authors would like to discuss it in v6ops at IETF 102 (Montreal). Do =
folks find it interesting/useful?
>=20
> The primary working group for this will be intarea, for reasons =
related to the charter. However, it would be useful to know that the =
problem is a general one, and get comments on the proposed solution.
>=20
> Sent from my iPad
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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From: Fred Baker <fredbaker.ietf@gmail.com>
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Cc: Simon Allard <Simon.Allard=40vocusgroup.co.nz@dmarc.ietf.org>, "v6ops@ietf.org" <v6ops@ietf.org>, int-area <int-area@ietf.org>, draft-patterson-intarea-ipoe-health@ietf.org
To: Job Snijders <job@ntt.net>
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Subject: Re: [v6ops] draft-patterson-intarea-ipoe-health
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Thanks, Job. This is being pursued in int-area, as it will require a =
DHCP change. However, it is an operational issue, which is where v6ops =
comes in.

> On Jun 11, 2018, at 3:05 PM, Job Snijders <job@ntt.net> wrote:
>=20
> I agree there is an issue, multiple access providers confirmed they =
are making (never great) trade-offs between the lease periods and =
potential downtime for customers.
>=20
> I think the proposed solution is interesting in that it seems quite =
manageable to retrofit this in existing deployments through a software =
update and avoiding the introduction of new protocols. This may not be =
the approach with the most technical elegance and sophistication, but is =
perhaps "just good enough" for the problem at hand. IETF yearns for =
feedback from operators, and this draft is exactly that.
>=20
> I encourage the authors to produce running code and run some trials to =
validate the idea. It'll be hard to argue with proven ideas :-)
>=20
> Kind regards,
>=20
> Job


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From: "STARK, BARBARA H" <bs7652@att.com>
To: "'Andrew Sullivan'" <ajs@anvilwalrusden.com>, "v6ops@ietf.org" <v6ops@ietf.org>
Thread-Topic: [v6ops] draft-palet-v6ops-nat64-deployment discussion
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Subject: Re: [v6ops] draft-palet-v6ops-nat64-deployment discussion
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I've been rather quiet on this, trying to figure out how to politely say (w=
ith explanation) that I don't think this doc is in a state that would make =
it acceptable as a WG draft. But in re-reading Andrew's response from a few=
 weeks ago, I think he's managed to put into words what some of my reservat=
ions are. I'm top-posting on Andrew's email, with my summary of some of the=
 points he made, and my conclusions.
A BCP that provides accurate and usable criteria for evaluating "which NAT6=
4 architecture is right for me" might be a good thing to produce. But this =
draft isn't it. This draft lacks WG consensus that it has the correct asses=
sment of the various architectural options. It is also not written in a way=
 that makes it easy to compare the pros and cons of the various options aga=
inst the needs of a network operator. The draft has potential, but isn't th=
ere (yet?).
I don't have enough interest in this to spend the time needed to overcome t=
hese objections. So raising these objections should not be seen as an oblig=
ation to actively provide the corrections needed to overcome these objectio=
ns.
Barbara

> -----Original Message-----
> From: v6ops <v6ops-bounces@ietf.org> On Behalf Of Andrew Sullivan
> Sent: Tuesday, May 29, 2018 3:38 PM
> To: v6ops@ietf.org
> Subject: Re: [v6ops] draft-palet-v6ops-nat64-deployment discussion
>=20
> Hi,
>=20
> On Tue, May 29, 2018 at 08:27:29PM +0200, JORDI PALET MARTINEZ wrote:
>=20
> > I understand your point that NAT64 was meant to be "imperfect", but thi=
s
> is something that is not valid for operators. Operators need to support
> existing customers with existing devices and apps, that only have IPv4
> support, and this is only possible with NAT64 + CLAT.
> >
>=20
> Obviously, operators have customers and need to support whatever they
> need to support.  It appears that there are people who are using 464XLAT
> with DNS64 where that works for them.  I certainly have no trouble with
> something that wants to outline (for instance) how one would make a
> determination about whether anyone downstream is doing their own
> validation.  What I think is wrong here is a generic claim that one or an=
other
> approach is the only right answer, because the CLAT in many cases require=
s
> more translation (which means more overhead and more work that the
> operator has to do).
>=20
> > Also, most of the actual usages of 464XLAT are still using DNS64 (excep=
t a
> few like Orange in Poland if I recall correctly), so the point is to expl=
ain that
> you can also solve the DNSSEC issue, when using CLAT (not using DNS64), e=
tc.
> >
>=20
> Well, you can indeed.  I think there is nothing wrong with making this po=
int,
> but the document as it is appears to be suggesting that the trade-off is =
not
> clear in DNS64.  I think RFC 6147 is crystal clear about it, so I don't g=
et why this
> document (which has a much less comprehensive treatment of what fails
> and why) is an improvement.
>=20
> > So, the goal of the document is to find what is the "best" possible
> > way to deploy NAT64, which in my opinion, in the real world is by
> > using it combined with CLAT.
>=20
> I don't observe that the document is called "Jordi's opinion on best
> NAT64 deployment scenarios".  If the WG is supposed to work on this, then=
 I
> think it would be better to outline the various trade-offs and allow peop=
le to
> make their own choices, fully informed.
>=20
> > Of course, Section 3.1 (now 4.1 in v1) is not a credible case, but I
> > wanted to do the exercise of looking into all possible cases, just to
> > make sure that somebody using the document see what is possible and
> > what is not, instead of making the exercise by themselves.
>=20
> I see.  Such a section could be massively improved, then, by calling out =
the
> scenarios that are known not to work, that are broken on purpose, and so
> on.  At the moment, it reads as though these alternatives are all live
> possibilities, but some of them simply aren't, were never intended to be,=
 and
> are not a real problem anyone should have.
>=20
> > What I disagree with you is in your comment that anyone who is willing =
to
> deploy (let's concentrate in) 464XLAT, will do DNS64 too. This is actuall=
y not
> needed in that case.
> >
>=20
> I think what I said is that they're going to _be able_ to, not that they =
would.  I
> do not claim that DNS64 ought to be deployed by anyone.
> It's just a mechanism that is available if it happens to fit a need, and =
each
> network operator needs to evaluate that.  I claim that the I-D as written
> doesn't actually help people do such an evaluation, and that in fact it l=
eaves
> out some of the necessary analysis.
>=20
> > Maybe if you see the point that an operator will not be able to provide
> services without the CLAT, you have a better understanding on the
> document now.
> >
>=20
> It's simply false that an operator will not be able to provide service wi=
thout
> the CLAT, but it is true that _some_ operators will find such a service
> inadequate.  I believe that's why 464XLAT was invented, in fact.
>=20
> > Would you agree that if an operator deploying IPv6-only access want to
> make sure that the customers using some IPv4-only devices work fine, the
> only way is using NAT64+CLAT, and that using NAT64+DNS64 will not work?
> >
>=20
> No.  But I believe that there are operators for whom that will be true.  =
I also
> believe there are operators for whom 464XLAT with DNS64 is a viable and
> useful option in some scenarios, particularly having to do with the costs=
 of
> double translation.  I'm not opposed to a document that attempts to lay o=
ut
> the trade-offs.  I am very much opposed to a document that attempts to sa=
y
> there's only one way that works, because it isn't true.  Indeed, for some
> values of "works", _none_ of this qualifies, and the only real answer is =
native
> ipv6.
>=20
> Best regards,
>=20
> A
>=20
> --
> Andrew Sullivan
> ajs@anvilwalrusden.com
>=20
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> 3A__www.ietf.org_mailman_listinfo_v6ops&d=3DDwICAg&c=3DLFYZ-
> o9_HUMeMTSQicvjIg&r=3DLoGzhC-
> 8sc8SY8Tq4vrfog&m=3DRSkkIe4IvPSsZ3MQjB0zrke22MCFWChjY3TS_hlIyu8&s=3D
> vSMt4g-fkpgeb1fo2zsjL5D0DcFGs_nZzDf1agm1obo&e=3D


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Date: Tue, 12 Jun 2018 08:43:44 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "STARK, BARBARA H" <bs7652@att.com>, 'Andrew Sullivan' <ajs@anvilwalrusden.com>, "v6ops@ietf.org" <v6ops@ietf.org>
Message-ID: <06381673-28C9-4B8A-A2E8-46CFB2FBDFEB@consulintel.es>
Thread-Topic: [v6ops] draft-palet-v6ops-nat64-deployment discussion
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Subject: Re: [v6ops] draft-palet-v6ops-nat64-deployment discussion
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Thanks Barbara.

Already working in a new version to accommodate to that, so I think it will=
 make sense for anyone willing to contribute, to wait until I've submitted =
that version, unless is adding something substantially different to what An=
drew provided.=20

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBARA H" <bs7652@=
att.com>
Fecha: martes, 12 de junio de 2018, 2:39
Para: 'Andrew Sullivan' <ajs@anvilwalrusden.com>, "v6ops@ietf.org" <v6ops@i=
etf.org>
Asunto: Re: [v6ops] draft-palet-v6ops-nat64-deployment discussion

    I've been rather quiet on this, trying to figure out how to politely sa=
y (with explanation) that I don't think this doc is in a state that would m=
ake it acceptable as a WG draft. But in re-reading Andrew's response from a=
 few weeks ago, I think he's managed to put into words what some of my rese=
rvations are. I'm top-posting on Andrew's email, with my summary of some of=
 the points he made, and my conclusions.
    A BCP that provides accurate and usable criteria for evaluating "which =
NAT64 architecture is right for me" might be a good thing to produce. But t=
his draft isn't it. This draft lacks WG consensus that it has the correct a=
ssessment of the various architectural options. It is also not written in a=
 way that makes it easy to compare the pros and cons of the various options=
 against the needs of a network operator. The draft has potential, but isn'=
t there (yet?).
    I don't have enough interest in this to spend the time needed to overco=
me these objections. So raising these objections should not be seen as an o=
bligation to actively provide the corrections needed to overcome these obje=
ctions.
    Barbara
   =20
    > -----Original Message-----
    > From: v6ops <v6ops-bounces@ietf.org> On Behalf Of Andrew Sullivan
    > Sent: Tuesday, May 29, 2018 3:38 PM
    > To: v6ops@ietf.org
    > Subject: Re: [v6ops] draft-palet-v6ops-nat64-deployment discussion
    >=20
    > Hi,
    >=20
    > On Tue, May 29, 2018 at 08:27:29PM +0200, JORDI PALET MARTINEZ wrote:
    >=20
    > > I understand your point that NAT64 was meant to be "imperfect", but=
 this
    > is something that is not valid for operators. Operators need to suppo=
rt
    > existing customers with existing devices and apps, that only have IPv=
4
    > support, and this is only possible with NAT64 + CLAT.
    > >
    >=20
    > Obviously, operators have customers and need to support whatever they
    > need to support.  It appears that there are people who are using 464X=
LAT
    > with DNS64 where that works for them.  I certainly have no trouble wi=
th
    > something that wants to outline (for instance) how one would make a
    > determination about whether anyone downstream is doing their own
    > validation.  What I think is wrong here is a generic claim that one o=
r another
    > approach is the only right answer, because the CLAT in many cases req=
uires
    > more translation (which means more overhead and more work that the
    > operator has to do).
    >=20
    > > Also, most of the actual usages of 464XLAT are still using DNS64 (e=
xcept a
    > few like Orange in Poland if I recall correctly), so the point is to =
explain that
    > you can also solve the DNSSEC issue, when using CLAT (not using DNS64=
), etc.
    > >
    >=20
    > Well, you can indeed.  I think there is nothing wrong with making thi=
s point,
    > but the document as it is appears to be suggesting that the trade-off=
 is not
    > clear in DNS64.  I think RFC 6147 is crystal clear about it, so I don=
't get why this
    > document (which has a much less comprehensive treatment of what fails
    > and why) is an improvement.
    >=20
    > > So, the goal of the document is to find what is the "best" possible
    > > way to deploy NAT64, which in my opinion, in the real world is by
    > > using it combined with CLAT.
    >=20
    > I don't observe that the document is called "Jordi's opinion on best
    > NAT64 deployment scenarios".  If the WG is supposed to work on this, =
then I
    > think it would be better to outline the various trade-offs and allow =
people to
    > make their own choices, fully informed.
    >=20
    > > Of course, Section 3.1 (now 4.1 in v1) is not a credible case, but =
I
    > > wanted to do the exercise of looking into all possible cases, just =
to
    > > make sure that somebody using the document see what is possible and
    > > what is not, instead of making the exercise by themselves.
    >=20
    > I see.  Such a section could be massively improved, then, by calling =
out the
    > scenarios that are known not to work, that are broken on purpose, and=
 so
    > on.  At the moment, it reads as though these alternatives are all liv=
e
    > possibilities, but some of them simply aren't, were never intended to=
 be, and
    > are not a real problem anyone should have.
    >=20
    > > What I disagree with you is in your comment that anyone who is will=
ing to
    > deploy (let's concentrate in) 464XLAT, will do DNS64 too. This is act=
ually not
    > needed in that case.
    > >
    >=20
    > I think what I said is that they're going to _be able_ to, not that t=
hey would.  I
    > do not claim that DNS64 ought to be deployed by anyone.
    > It's just a mechanism that is available if it happens to fit a need, =
and each
    > network operator needs to evaluate that.  I claim that the I-D as wri=
tten
    > doesn't actually help people do such an evaluation, and that in fact =
it leaves
    > out some of the necessary analysis.
    >=20
    > > Maybe if you see the point that an operator will not be able to pro=
vide
    > services without the CLAT, you have a better understanding on the
    > document now.
    > >
    >=20
    > It's simply false that an operator will not be able to provide servic=
e without
    > the CLAT, but it is true that _some_ operators will find such a servi=
ce
    > inadequate.  I believe that's why 464XLAT was invented, in fact.
    >=20
    > > Would you agree that if an operator deploying IPv6-only access want=
 to
    > make sure that the customers using some IPv4-only devices work fine, =
the
    > only way is using NAT64+CLAT, and that using NAT64+DNS64 will not wor=
k?
    > >
    >=20
    > No.  But I believe that there are operators for whom that will be tru=
e.  I also
    > believe there are operators for whom 464XLAT with DNS64 is a viable a=
nd
    > useful option in some scenarios, particularly having to do with the c=
osts of
    > double translation.  I'm not opposed to a document that attempts to l=
ay out
    > the trade-offs.  I am very much opposed to a document that attempts t=
o say
    > there's only one way that works, because it isn't true.  Indeed, for =
some
    > values of "works", _none_ of this qualifies, and the only real answer=
 is native
    > ipv6.
    >=20
    > Best regards,
    >=20
    > A
    >=20
    > --
    > Andrew Sullivan
    > ajs@anvilwalrusden.com
    >=20
    > _______________________________________________
    > v6ops mailing list
    > v6ops@ietf.org
    > https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
    > 3A__www.ietf.org_mailman_listinfo_v6ops&d=3DDwICAg&c=3DLFYZ-
    > o9_HUMeMTSQicvjIg&r=3DLoGzhC-
    > 8sc8SY8Tq4vrfog&m=3DRSkkIe4IvPSsZ3MQjB0zrke22MCFWChjY3TS_hlIyu8&s=3D
    > vSMt4g-fkpgeb1fo2zsjL5D0DcFGs_nZzDf1agm1obo&e=3D
   =20
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20



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From nobody Mon Jun 11 23:52:05 2018
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Date: Tue, 12 Jun 2018 08:51:54 +0200
Cc: "v6ops@ietf.org" <v6ops@ietf.org>, "fredbaker.ietf@gmail.com" <fredbaker.ietf@gmail.com>, "intarea-chairs@ietf.org" <intarea-chairs@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/YLqg8lCB7u58HOzbk7C0M78M-mE>
Subject: Re: [v6ops] draft-patterson-intarea-ipoe-health
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Simon,

I can=E2=80=99t recall right now if we wrote the general idea down, but ther=
e is something similar alluded to in e.g 6RD.=20

Make the assertion that the CPE is responsible for the forwarding state in t=
he BNG. State is maintained with DHCP. Lost state in the BNG is detected by t=
he CPE using something akin to BFD echo mode.=20

I=E2=80=99d be happy if someone had time to write it up.=20

Cheers=20
Ole

> On 11 Jun 2018, at 23:45, Simon Allard <Simon.Allard=3D40vocusgroup.co.nz@=
dmarc.ietf.org> wrote:
>=20
> Hi Fred
>=20
> IPoE Health is something we have struggled with. We are a NZ based ISP wit=
h a large IPoE customer base.
>=20
> We are currently running our BNG's with 5 minute lease timers to try and g=
et around the issue where the BNG declares the subscriber as dead and kills t=
he session, however the client remains online until the lease expires.
>=20
> We have had discussions with our CPE vendors around arp detection/resettin=
g DHCP however those conversations have not gone well, with the CPE vendor s=
aying that ARP and DHCP are 2 different things and can't be mixed. We also l=
ooked at doing something similar with DNS (3 DNS request fail and it turns D=
HCP into discovery mode), and BFD but nothing really got passed the whiteboa=
rd discussions phase.
>=20
> If there was an accepted RFC we could point the vendors at, it would make t=
hose discussions much easier.
>=20
> Cheers,
> Simon
> AS9790
>=20
>=20
> Simon Allard=E2=80=8B	 | 	Development & Operations Manager
> D: 	+64 9 550 2790	 	E: 	Simon.Allard@vocusgroup.co.nz
> M: 	+64 20 1000 790	  	W: 	vocusgroup.co.nz
> A: 	Level 2, 1-7 The Strand, Takapuna 0622
> <image664000.png>
>=20
> ---------- Forwarded message ---------
> From: Fred Baker <fredbaker.ietf@gmail.com>
> Date: Sat, 9 Jun 2018 at 22:58
> Subject: [v6ops] draft-patterson-intarea-ipoe-health
> To: <v6ops@ietf.org>
> Cc: <intarea-chairs@ietf.org>
>=20
>=20
> Looking for comments on draft-patterson-intarea-ipoe-health-00. The author=
s would like to discuss it in v6ops at IETF 102 (Montreal). Do folks find it=
 interesting/useful?
>=20
> The primary working group for this will be intarea, for reasons related to=
 the charter. However, it would be useful to know that the problem is a gene=
ral one, and get comments on the proposed solution.
>=20
> Sent from my iPad
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops

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	charset=utf-8
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div></div><div>Simon,</div><div><br></div>=
<div>I can=E2=80=99t recall right now if we wrote the general idea down, but=
 there is something similar alluded to in e.g 6RD.&nbsp;</div><div><br></div=
><div>Make the assertion that the CPE is responsible for the forwarding stat=
e in the BNG. State is maintained with DHCP. Lost state in the BNG is detect=
ed by the CPE using something akin to BFD echo mode.&nbsp;</div><div><br></d=
iv><div>I=E2=80=99d be happy if someone had time to write it up.&nbsp;</div>=
<div><br></div><div>Cheers&nbsp;</div><div>Ole</div><div><br>On 11 Jun 2018,=
 at 23:45, Simon Allard &lt;<a href=3D"mailto:Simon.Allard=3D40vocusgroup.co=
.nz@dmarc.ietf.org">Simon.Allard=3D40vocusgroup.co.nz@dmarc.ietf.org</a>&gt;=
 wrote:<br><br></div><blockquote type=3D"cite"><div><meta http-equiv=3D"Cont=
ent-Type" content=3D"text/html; charset=3Dutf-8"><div>Hi Fred<br><br>IPoE He=
alth is something we have struggled with. We are a NZ based ISP with a large=
 IPoE customer base.<br><br>We are currently running our BNG's with 5 minute=
 lease timers to try and get around the issue where the BNG declares the sub=
scriber as dead and kills the session, however the client remains online unt=
il the lease expires.<br><br>We have had discussions with our CPE vendors ar=
ound arp detection/resetting DHCP however those conversations have not gone w=
ell, with the CPE vendor saying that ARP and DHCP are 2 different things and=
 can't be mixed. We also looked at doing something similar with DNS (3 DNS r=
equest fail and it turns DHCP into discovery mode), and BFD but nothing real=
ly got passed the whiteboard discussions phase.<br><br>If there was an accep=
ted RFC we could point the vendors at, it would make those discussions much e=
asier.<br><br>Cheers,<br>Simon<br>AS9790<br><br><div style=3D"mso-line-heigh=
t-rule:exactly;-webkit-text-size-adjust:100%;"><br><table cellpadding=3D"0" c=
ellspacing=3D"0" border=3D"0" style=3D"background-color:#FFFFFF;border-colla=
pse:collapse;font-size:0;line-height:18.33px;"><tbody><tr><td align=3D"left"=
 style=3D"padding:0 0 15px;vertical-align:top;"><table cellpadding=3D"0" cel=
lspacing=3D"0" border=3D"0" style=3D"border-collapse:collapse;font-size:14.6=
7px;color:#808080;font-style:normal;font-weight:bold;white-space:nowrap;text=
-decoration:none;"><tbody><tr><td align=3D"left" style=3D"vertical-align:top=
;text-align:left;color:#065897;font-family:Helvetica,Helvetica Neue,Arial,sa=
ns-serif;">Simon&nbsp;Allard<span style=3D"font-family:remialcxesans;">=E2=80=
=8B</span></td><td align=3D"left" style=3D"vertical-align:top;text-align:lef=
t;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:normal;w=
hite-space:normal;">&nbsp;|&nbsp;</td><td align=3D"left" style=3D"vertical-a=
lign:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-ser=
if;">Development&nbsp;&amp;&nbsp;Operations&nbsp;Manager</td></tr></tbody></=
table></td></tr><tr style=3D"line-height:13.33px;"><td align=3D"left" style=3D=
"padding:0 0 10px;vertical-align:top;"><table cellpadding=3D"0" cellspacing=3D=
"0" border=3D"0" style=3D"border-collapse:collapse;font-size:0;"><tbody><tr>=
<td align=3D"left" style=3D"vertical-align:top;"><table cellpadding=3D"0" ce=
llspacing=3D"0" border=3D"0" style=3D"border-collapse:collapse;font-size:10.=
66px;color:#065897;font-style:normal;font-weight:normal;white-space:nowrap;t=
ext-decoration:none;"><tbody><tr><td align=3D"left" style=3D"vertical-align:=
top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;fo=
nt-weight:bold;">D:&nbsp;</td><td align=3D"left" style=3D"vertical-align:top=
;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-serif;"><a h=
ref=3D"tel:+64%209%20550%202790" target=3D"_blank" id=3D"LPlnk689713" style=3D=
"color:#808080;text-decoration:none;"><strong style=3D"font-weight:normal;">=
+64&nbsp;9&nbsp;550&nbsp;2790</strong></a></td><td align=3D"left" style=3D"v=
ertical-align:top;text-align:left;color:#808080;font-family:Helvetica,Helvet=
ica Neue,Arial,sans-serif;white-space:normal;">&nbsp;</td><td align=3D"left"=
 style=3D"vertical-align:top;text-align:left;font-family:Helvetica,Helvetica=
 Neue,Arial,sans-serif;font-weight:bold;">E:&nbsp;</td><td align=3D"left" st=
yle=3D"vertical-align:top;text-align:left;font-family:Helvetica,Helvetica Ne=
ue,Arial,sans-serif;"><a href=3D"mailto:Simon.Allard@vocusgroup.co.nz" targe=
t=3D"_blank" id=3D"LPlnk689713" style=3D"color:#808080;text-decoration:under=
line;"><strong style=3D"font-weight:normal;">Simon.Allard@vocusgroup.co.nz</=
strong></a></td></tr></tbody></table></td></tr><tr><td align=3D"left" style=3D=
"vertical-align:top;"><table cellpadding=3D"0" cellspacing=3D"0" border=3D"0=
" style=3D"border-collapse:collapse;font-size:10.66px;color:#065897;font-sty=
le:normal;font-weight:normal;white-space:nowrap;text-decoration:none;"><tbod=
y><tr><td align=3D"left" style=3D"vertical-align:top;text-align:left;font-fa=
mily:Helvetica,Helvetica Neue,Arial,sans-serif;font-weight:bold;">M:&nbsp;</=
td><td align=3D"left" style=3D"vertical-align:top;text-align:left;font-famil=
y:Helvetica,Helvetica Neue,Arial,sans-serif;"><a href=3D"tel:+64%2020%201000=
%20790" target=3D"_blank" id=3D"LPlnk689713" style=3D"color:#808080;text-dec=
oration:none;"><strong style=3D"font-weight:normal;">+64&nbsp;20&nbsp;1000&n=
bsp;790</strong></a></td><td align=3D"left" style=3D"vertical-align:top;text=
-align:left;color:#808080;font-family:Helvetica,Helvetica Neue,Arial,sans-se=
rif;white-space:normal;">&nbsp;&nbsp;</td><td align=3D"left" style=3D"vertic=
al-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans=
-serif;font-weight:bold;">W:&nbsp;</td><td align=3D"left" style=3D"vertical-=
align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans-se=
rif;"><a href=3D"http://vocusgroup.co.nz" target=3D"_blank" id=3D"LPlnk68971=
3" style=3D"color:#808080;text-decoration:underline;"><strong style=3D"font-=
weight:normal;">vocusgroup.co.nz</strong></a></td></tr></tbody></table></td>=
</tr><tr><td align=3D"left" style=3D"vertical-align:top;"><table cellpadding=
=3D"0" cellspacing=3D"0" border=3D"0" style=3D"border-collapse:collapse;font=
-size:10.66px;color:#065897;font-style:normal;font-weight:normal;white-space=
:nowrap;text-decoration:none;"><tbody><tr><td align=3D"left" style=3D"vertic=
al-align:top;text-align:left;font-family:Helvetica,Helvetica Neue,Arial,sans=
-serif;font-weight:bold;">A:&nbsp;</td><td align=3D"left" style=3D"vertical-=
align:top;text-align:left;color:#808080;font-family:Helvetica,Helvetica Neue=
,Arial,sans-serif;">Level&nbsp;2,&nbsp;1-7&nbsp;The&nbsp;Strand,&nbsp;Takapu=
na&nbsp;0622</td></tr></tbody></table></td></tr></tbody></table></td></tr><t=
r style=3D"line-height:normal;"><td align=3D"left" style=3D"padding:0 0 10px=
;vertical-align:top;"><table cellpadding=3D"0" cellspacing=3D"0" border=3D"0=
" style=3D"border-collapse:collapse;font-size:0;"><tbody><tr><td align=3D"ce=
nter" style=3D"vertical-align:middle;"><a href=3D"http://www.vocusgroup.co.n=
z" target=3D"_blank" id=3D"LPlnk689713" style=3D"text-decoration:none;">&lt;=
image664000.png&gt;</a></td></tr></tbody></table></td></tr></tbody></table><=
br></div>---------- Forwarded message ---------<br>From: Fred Baker &lt;<a h=
ref=3D"mailto:fredbaker.ietf@gmail.com">fredbaker.ietf@gmail.com</a>&gt;<br>=
Date: Sat, 9 Jun 2018 at 22:58<br>Subject: [v6ops] draft-patterson-intarea-i=
poe-health<br>To: &lt;<a href=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a>&g=
t;<br>Cc: &lt;<a href=3D"mailto:intarea-chairs@ietf.org">intarea-chairs@ietf=
.org</a>&gt;<br><br><br>Looking for comments on draft-patterson-intarea-ipoe=
-health-00. The authors would like to discuss it in v6ops at IETF 102 (Montr=
eal). Do folks find it interesting/useful?<br><br>The primary working group f=
or this will be intarea, for reasons related to the charter. However, it wou=
ld be useful to know that the problem is a general one, and get comments on t=
he proposed solution.<br><br>Sent from my iPad<br>__________________________=
_____________________<br>v6ops mailing list<br><a href=3D"mailto:v6ops@ietf.=
org">v6ops@ietf.org</a><br><a href=3D"https://www.ietf.org/mailman/listinfo/=
v6ops">https://www.ietf.org/mailman/listinfo/v6ops</a><br></div></div></bloc=
kquote><blockquote type=3D"cite"><div><span>________________________________=
_______________</span><br><span>v6ops mailing list</span><br><span><a href=3D=
"mailto:v6ops@ietf.org">v6ops@ietf.org</a></span><br><span><a href=3D"https:=
//www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mailman/listinfo=
/v6ops</a></span><br></div></blockquote></body></html>=

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From: Richard Patterson <richard@helix.net.nz>
Date: Tue, 12 Jun 2018 10:01:19 +0100
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On Tue, 12 Jun 2018 at 07:52, Ole Troan <otroan@employees.org> wrote:

> Simon,
>
> I can=E2=80=99t recall right now if we wrote the general idea down, but t=
here is
> something similar alluded to in e.g 6RD.
>
> Make the assertion that the CPE is responsible for the forwarding state i=
n
> the BNG. State is maintained with DHCP. Lost state in the BNG is detected
> by the CPE using something akin to BFD echo mode.
>
> I=E2=80=99d be happy if someone had time to write it up.
>


Broadband Forum's TR-146 suggests the use of BFD Echo as a detection
mechanism, but it then only talks about triggering a renew, which often
times won't help.

I'm about to upload -01 of our draft which references TR-146, and now has a
section for BFD Echo.   This new section will prefer the use of BFD Echo as
the health check mechanism over ARP/ND when it is available.   If you could
take a look at it and let us know if it's in-line with your thinking please=
?

-Richard

--000000000000b0a7b9056e6e1c96
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<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">On Tue, 12 Jun=
 2018 at 07:52, Ole Troan &lt;<a href=3D"mailto:otroan@employees.org">otroa=
n@employees.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div=
 dir=3D"auto"><div></div><div>Simon,</div><div><br></div><div>I can=E2=80=
=99t recall right now if we wrote the general idea down, but there is somet=
hing similar alluded to in e.g 6RD.=C2=A0</div><div><br></div><div>Make the=
 assertion that the CPE is responsible for the forwarding state in the BNG.=
 State is maintained with DHCP. Lost state in the BNG is detected by the CP=
E using something akin to BFD echo mode.=C2=A0</div><div><br></div><div>I=
=E2=80=99d be happy if someone had time to write it up.=C2=A0</div></div></=
blockquote><div><br></div><div><br></div><div>Broadband Forum&#39;s TR-146 =
suggests the use of BFD Echo as a detection mechanism, but it then only tal=
ks about triggering a renew, which often times won&#39;t help.</div><div><b=
r></div><div>I&#39;m about to upload -01 of our draft which references TR-1=
46, and now has a section for BFD Echo.=C2=A0 =C2=A0This new section will p=
refer the use of BFD Echo as the health check mechanism over ARP/ND when it=
 is available.=C2=A0 =C2=A0If you could take a look at it and let us know i=
f it&#39;s in-line with your thinking please?</div><div><br></div><div>-Ric=
hard</div><div><br></div></div></div>

--000000000000b0a7b9056e6e1c96--


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In-reply-to: Your message of "Mon, 11 Jun 2018 19:15:21 +0200 ." <D327A7C2-4ECC-417A-AC29-25A0573FDF6C@consulintel.es> 
Date: Tue, 12 Jun 2018 11:53:13 +0200
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/4ntwmAz4vBOwJWeBMX2Z_y1Y1qM>
Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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> I see your point, but
> what an operator need is a "100% sure" way to make sure that they
> can tell the CPE to not use a specific transition mechanism (which
> for the other mechanisms we have with RFC8026).
> 
> So, assuming that DNS64 is only there if combined with NAT64 is
> not "safe 100%" because if using CLAT, you can avoid having a DNS64
> (this is the one that breaks DNSSEC, in case I wrote it incorrectly
> before).

I'm saying that if an operator uses DNS64 to signal the presence of NAT64,
then that is a reliable signal that doesn't need an additional DHCP option.

So if is safe for a CPE to just do RFC7050, because if DNS64 is detected,
you can be sure that the operator wants the CPE to use NAT64.

> But if the user changed the DNS in the CPE (which is quite common),
> there will not be DNS64 and still may be the ISP want to have the
> CLAT running, because is using that for the IPv4 service for that
> particular customer.

Yeah, what if the user changes settings? Maybe the CPE has a way to force 
NAT64 on. What do you do then? All bets are off when users start changing
settings.

In the context of RFC7050, the CPE can opt to use the original resolvers
provided by upstream to figure out the translation prefix.

Note that if the CPE uses resolvers configured by the user for RFC7050, then
is it quite possible that the translation prefix is not discovered (for example
if the user configures a well known public resolver). Or worse, 
the user may configure a DNS64 resolver that uses a different prefix.

> If you agree that the CPE may request a PCP option, etc., then
> request the S46, I think you are in agreement that we need the S46
> priority option codes for all the mechanism that we are asking to
> be supported by the CPE, right?

To the extent that RFC8026 is incomplete, that should be fixed. However as
Section 2.2 describes, what S46 offers can be done already be done by the
DHCPv6 server. So S46 just provides a relative priority of different
mechanisms, not an on/off switch for NAT64.



From nobody Tue Jun 12 02:56:58 2018
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To: Richard Patterson <richard@helix.net.nz>
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Subject: Re: [v6ops] draft-patterson-intarea-ipoe-health
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Richard,

> I can=E2=80=99t recall right now if we wrote the general idea down, =
but there is something similar alluded to in e.g 6RD.
>=20
> Make the assertion that the CPE is responsible for the forwarding =
state in the BNG. State is maintained with DHCP. Lost state in the BNG =
is detected by the CPE using something akin to BFD echo mode.
>=20
> I=E2=80=99d be happy if someone had time to write it up.
>=20
>=20
> Broadband Forum's TR-146 suggests the use of BFD Echo as a detection =
mechanism, but it then only talks about triggering a renew, which often =
times won't help.
>=20
> I'm about to upload -01 of our draft which references TR-146, and now =
has a section for BFD Echo.   This new section will prefer the use of =
BFD Echo as the health check mechanism over ARP/ND when it is available. =
  If you could take a look at it and let us know if it's in-line with =
your thinking please?

Ah, yes that's where it ended up. ;-)
Of course it doesn't have to be an actual BFD packet for that matter. =
But BFD echo has the whole framework described, so that's probably =
useful to reuse.
The only thing required is that the CPE can send a packet to itself via =
the BNG.

Cheers,
Ole

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Tue, 12 Jun 2018 19:12:44 +0900
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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On Mon, Jun 11, 2018 at 9:55 PM JORDI PALET MARTINEZ <jordi.palet=3D
40consulintel.es@dmarc.ietf.org> wrote:

> The point is the ISP to be able to turn on or off each mechanism (464XLAT=
,
> MAP, DS-Lite, etc.), and this is easily done if all them share the same
> DHCP option.
>
> The ISP can easily turn off 464xlat via DHCPv6 today: just provide DNS
> servers that don't do DNS64 translation.
>
>
>
> No, that is not a solution, at least not for the scope of what is needed
> in this document.
>
> You can run 464XLAT without DNS64, so to avoid breaking DNSSEC, so that
> will not work.
>

If you don't use DNS64 you can't use 464xlat at all, because you can't
communicate the plat prefix to the clat.

Also, users tend to change their DNS servers, so once more this doesn=E2=80=
=99t
> work.
>

Per the above: if the users change the DNS servers, 464xlat will stop
working regardless of what the ISP says.

> I will like to understand if we still have such opposition, why.
>
> Because it requires additional standards work, engineering work and
> implementation complexity to achieve something that is already possible
> today using RFC 7050.
>
>
>
> I believe you=E2=80=99re misunderstanding what is needed here. I=E2=80=99=
m not talking
> about a new DHCPv6 way to =E2=80=9Cfind=E2=80=9D the NAT64 prefix or serv=
er. This is
> already done by RFC7050 or RFC7225 (PCP).
>
> It is not a NEW DHCPv6 protocol. Is a new option code in an existing
> protocol (RFC8026). There is nothing new to develop. We just need to tell
> IANA =E2=80=9Cin addition to the already defined option codes for DS-LITE=
, MAP,
> etc., define one for 464XLAT=E2=80=9D.
>

I still don't see a use case for this. If an operator uses 464xlat, they
must use RFC 7050 to provision it because there is no other mechanism.
Additionally, if the user changes the DNS server to a non-DNS64 server,
464xlat stops working, and if the user changes the DNS server to a DNS64
server that doesn't hand out the operator's NAT64 prefix, 464xlat stops
working or only works suboptimally. There is nothing the operator can do
about this except accept the breakage or prevent the user from changing the
DNS server.

Therefore, I think the following covers all cases:

   1. If the operator wants to enable 464xlat: they should hand out a DNS64
   to the CPE.
   2. If the operator wants to disable 464xlat: they should NOT hand out a
   DNS64 to the CPE.
   3. If the operator uses 464xlat, they should not allow the user to
   change the DNS server.

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<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">On Mon, Jun 11=
, 2018 at 9:55 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:=
40consulintel.es@dmarc.ietf.org">40consulintel.es@dmarc.ietf.org</a>&gt; wr=
ote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=
=3D"ES"><div class=3D"gmail-m_9177844290540612637WordSection1"><blockquote =
style=3D"border-top:none;border-right:none;border-bottom:none;border-left:1=
pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;margin-=
right:0cm"><div><div><p class=3D"MsoNormal" style=3D"margin-left:35.4pt">Th=
e point is the ISP to be able to turn on or off each mechanism (464XLAT, MA=
P, DS-Lite, etc.), and this is easily done if all them share the same DHCP =
option.=C2=A0</p></div></div></blockquote><div><p class=3D"MsoNormal" style=
=3D"margin-left:35.4pt"><u></u></p></div><div><p class=3D"MsoNormal" style=
=3D"margin-left:35.4pt">The ISP can easily turn off 464xlat via DHCPv6 toda=
y: just provide DNS servers that don&#39;t do DNS64 translation.<u></u><u><=
/u></p></div><div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=
=3D"MsoNormal"><span lang=3D"EN-US">No, that is not a solution, at least no=
t for the scope of what is needed in this document.<u></u><u></u></span></p=
><p class=3D"MsoNormal"><span lang=3D"EN-US">You can run 464XLAT without DN=
S64, so to avoid breaking DNSSEC, so that will not work.</span></p></div></=
div></div></blockquote><div><br></div><div>If you don&#39;t use DNS64 you c=
an&#39;t use 464xlat at all, because you can&#39;t communicate the plat pre=
fix to the clat.</div><div><br></div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex"><div lang=3D"ES"><div class=3D"gmail-m_9177844290540612637WordS=
ection1"><div><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u><u></u></s=
pan></p><p class=3D"MsoNormal"><span lang=3D"EN-US">Also, users tend to cha=
nge their DNS servers, so once more this doesn=E2=80=99t work.</span>=C2=A0=
</p></div></div></div></blockquote><div><br></div><div>Per the above: if th=
e users change the DNS servers, 464xlat will stop working regardless of wha=
t the ISP says.</div><blockquote class=3D"gmail_quote" style=3D"margin:0px =
0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div=
 lang=3D"ES"><div class=3D"gmail-m_9177844290540612637WordSection1"><blockq=
uote style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1pt solid rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;ma=
rgin-right:0cm"><div><div><p class=3D"MsoNormal" style=3D"margin-left:35.4p=
t"><span lang=3D"EN-US">I will like to understand if we still have such opp=
osition, why.</span>=C2=A0</p></div></div></blockquote><div><p class=3D"Mso=
Normal" style=3D"margin-left:35.4pt"><u></u></p></div><div><p class=3D"MsoN=
ormal" style=3D"margin-left:35.4pt">Because it requires additional standard=
s work, engineering work and implementation complexity to achieve something=
 that is already possible today using RFC 7050.<u></u><u></u></p><p class=
=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><span lang=3D=
"EN-US">I believe you=E2=80=99re misunderstanding what is needed here. I=E2=
=80=99m not talking about a new DHCPv6 way to =E2=80=9Cfind=E2=80=9D the NA=
T64 prefix or server. This is already done by RFC7050 or RFC7225 (PCP). <u>=
</u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US">It is not=
 a NEW DHCPv6 protocol. Is a new option code in an existing protocol (RFC80=
26). There is nothing new to develop. We just need to tell IANA =E2=80=9Cin=
 addition to the already defined option codes for DS-LITE, MAP, etc., defin=
e one for 464XLAT=E2=80=9D.</span></p></div></div></div></blockquote><div><=
br></div><div>I still don&#39;t see a use case for this. If an operator use=
s 464xlat, they must use RFC 7050 to provision it because there is no other=
 mechanism. Additionally, if the user changes the DNS server to a non-DNS64=
 server, 464xlat stops working, and if the user changes the DNS server to a=
 DNS64 server that doesn&#39;t hand out the operator&#39;s NAT64 prefix, 46=
4xlat stops working or only works suboptimally. There is nothing the operat=
or can do about this except accept the breakage or prevent the user from ch=
anging the DNS server.</div><div><br></div><div>Therefore, I think the foll=
owing covers all cases:</div><div><ol><li>If the operator wants to enable 4=
64xlat: they should hand out a DNS64 to the CPE.</li><li>If the operator wa=
nts to disable=C2=A0464xlat: they should NOT hand out a DNS64 to the CPE.</=
li><li>If the operator uses 464xlat, they should not allow the user to chan=
ge the DNS server.</li></ol></div></div></div>

--00000000000046c78c056e6f1c5b--


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From: Lorenzo Colitti <lorenzo@google.com>
Date: Tue, 12 Jun 2018 19:13:53 +0900
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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--0000000000004b96fd056e6f2087
Content-Type: text/plain; charset="UTF-8"

On Tue, Jun 12, 2018 at 2:15 AM JORDI PALET MARTINEZ <jordi.palet=
40consulintel.es@dmarc.ietf.org> wrote:

> But if the user changed the DNS in the CPE (which is quite common), there
> will not be DNS64 and still may be the ISP want to have the CLAT running,
> because is using that for the IPv4 service for that particular customer.
>

You can't use 464xlat without DNS64 as there is no way to configure the
plat prefix.

--0000000000004b96fd056e6f2087
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<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">On Tue, Jun 12=
, 2018 at 2:15 AM JORDI PALET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:=
40consulintel.es@dmarc.ietf.org">40consulintel.es@dmarc.ietf.org</a>&gt; wr=
ote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex">But if the user changed the DN=
S in the CPE (which is quite common), there will not be DNS64 and still may=
 be the ISP want to have the CLAT running, because is using that for the IP=
v4 service for that particular customer.<br></blockquote><div><br></div><di=
v>You can&#39;t use 464xlat without DNS64 as there is no way to configure t=
he plat prefix.</div></div></div>

--0000000000004b96fd056e6f2087--


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Date: Tue, 12 Jun 2018 12:40:22 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Message-ID: <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es>
Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com>
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Hi Lorenzo,

=20

You don=E2=80=99t need RFC7050 neither DNS64, you can use PCP (RFC7225) to =
tell the CLAT the NAT64 prefix. It also provides additional advantages to t=
he operator to control many related aspects (see section 3 of RFC7225).

=20

1.       If the operator wants to enable 464xlat: they should hand out a DN=
S64 to the CPE.

2.       If the operator wants to disable 464xlat: they should NOT hand out=
 a DNS64 to the CPE.

This doesn=E2=80=99t work, because the operator may be using RFC7225 instea=
d of RFC7050. You need to try both in that case, and you aren=E2=80=99t pro=
viding a =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which=
 is what RFC8026 does.

=20

3.       If the operator uses 464xlat, they should not allow the user to ch=
ange the DNS server.

=20

=20

Let=E2=80=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the c=
ustomer to avoid changing the DNS =E2=80=A6 So that means that if instead o=
f enforcing DNS64 mechanism (RFC7050) to communicate the NAT64 prefix, you =
use an alternative way such at RFC7225, it becomes safer to unwanted user c=
hanges.


Regards,

Jordi

=20

=20

=20

De: Lorenzo Colitti <lorenzo=3D40google.com@dmarc.ietf.org>
Fecha: martes, 12 de junio de 2018, 12:13
Para: <jordi.palet@consulintel.es>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

=20

On Mon, Jun 11, 2018 at 9:55 PM JORDI PALET MARTINEZ <jordi.palet=3D40consu=
lintel.es@dmarc.ietf.org> wrote:

The point is the ISP to be able to turn on or off each mechanism (464XLAT, =
MAP, DS-Lite, etc.), and this is easily done if all them share the same DHC=
P option.=20

The ISP can easily turn off 464xlat via DHCPv6 today: just provide DNS serv=
ers that don't do DNS64 translation.

=20

No, that is not a solution, at least not for the scope of what is needed in=
 this document.

You can run 464XLAT without DNS64, so to avoid breaking DNSSEC, so that wil=
l not work.

=20

If you don't use DNS64 you can't use 464xlat at all, because you can't comm=
unicate the plat prefix to the clat.

=20

Also, users tend to change their DNS servers, so once more this doesn=E2=80=
=99t work.=20

=20

Per the above: if the users change the DNS servers, 464xlat will stop worki=
ng regardless of what the ISP says.

I will like to understand if we still have such opposition, why.=20

Because it requires additional standards work, engineering work and impleme=
ntation complexity to achieve something that is already possible today usin=
g RFC 7050.

=20

I believe you=E2=80=99re misunderstanding what is needed here. I=E2=80=99m =
not talking about a new DHCPv6 way to =E2=80=9Cfind=E2=80=9D the NAT64 pref=
ix or server. This is already done by RFC7050 or RFC7225 (PCP).=20

It is not a NEW DHCPv6 protocol. Is a new option code in an existing protoc=
ol (RFC8026). There is nothing new to develop. We just need to tell IANA =
=E2=80=9Cin addition to the already defined option codes for DS-LITE, MAP, =
etc., define one for 464XLAT=E2=80=9D.

=20

I still don't see a use case for this. If an operator uses 464xlat, they mu=
st use RFC 7050 to provision it because there is no other mechanism. Additi=
onally, if the user changes the DNS server to a non-DNS64 server, 464xlat s=
tops working, and if the user changes the DNS server to a DNS64 server that=
 doesn't hand out the operator's NAT64 prefix, 464xlat stops working or onl=
y works suboptimally. There is nothing the operator can do about this excep=
t accept the breakage or prevent the user from changing the DNS server.

=20

Therefore, I think the following covers all cases:

If the operator wants to enable 464xlat: they should hand out a DNS64 to th=
e CPE.
2.       If the operator wants to disable 464xlat: they should NOT hand out=
 a DNS64 to the CPE.

3.       If the operator uses 464xlat, they should not allow the user to ch=
ange the DNS server.



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=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span lang=3DEN-US=
 style=3D'mso-fareast-language:EN-US'>Hi Lorenzo,<o:p></o:p></span></p><p c=
lass=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'><o=
:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'=
mso-fareast-language:EN-US'>You don=E2=80=99t need RFC7050 neither DNS64, y=
ou can use PCP (RFC7225) to tell the CLAT the NAT64 prefix. It also provide=
s additional advantages to the operator to control many related aspects (se=
e section 3 of RFC7225).<o:p></o:p></span></p><p class=3DMsoNormal><span la=
ng=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p=
><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-al=
t:auto;margin-left:71.4pt;text-indent:-18.0pt;mso-list:l1 level1 lfo1'><![i=
f !supportLists]><span lang=3DEN-US><span style=3D'mso-list:Ignore'>1.<span=
 style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
; </span></span></span><![endif]><span lang=3DEN-US>If the operator wants t=
o enable 464xlat: they should hand out a DNS64 to the CPE.<o:p></o:p></span=
></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-botto=
m-alt:auto;margin-left:71.4pt;text-indent:-18.0pt;mso-list:l1 level1 lfo1'>=
<![if !supportLists]><span lang=3DEN-US><span style=3D'mso-list:Ignore'>2.<=
span style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp; </span></span></span><![endif]><span lang=3DEN-US>If the operator wan=
ts to disable&nbsp;464xlat: they should NOT hand out a DNS64 to the CPE.<o:=
p></o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;ms=
o-margin-bottom-alt:auto'><span lang=3DEN-US>This doesn=E2=80=99t work, bec=
ause the operator may be using RFC7225 instead of RFC7050. You need to try =
both in that case, and you aren=E2=80=99t providing a =E2=80=9Cpriority=E2=
=80=9D to a possible list of mechanisms, which is what RFC8026 does.<o:p></=
o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto'><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p cla=
ss=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;=
margin-left:71.4pt;text-indent:-18.0pt;mso-list:l1 level1 lfo1'><![if !supp=
ortLists]><span lang=3DEN-US><span style=3D'mso-list:Ignore'>3.<span style=
=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </sp=
an></span></span><![endif]><span lang=3DEN-US>If the operator uses 464xlat,=
 they should not allow the user to change the DNS server.<o:p></o:p></span>=
</p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:E=
N-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US s=
tyle=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3D=
MsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>Let=E2=80=
=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the customer t=
o avoid changing the DNS =E2=80=A6 So that means that if instead of enforci=
ng DNS64 mechanism (RFC7050) to communicate the NAT64 prefix, you use an al=
ternative way such at RFC7225, it becomes safer to unwanted user changes.<o=
:p></o:p></span></p><div><p class=3DMsoNormal><span lang=3DEN-US style=3D'f=
ont-size:10.5pt;color:black'><br></span><span lang=3DES-TRAD style=3D'font-=
size:10.5pt;color:black'>Regards,<o:p></o:p></span></p><p class=3DMsoNormal=
 style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD style=3D'font-size:10.=
5pt;color:black;mso-fareast-language:EN-US'>Jordi<o:p></o:p></span></p><p c=
lass=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD style=
=3D'font-size:10.5pt;color:black;mso-fareast-language:EN-US'><o:p>&nbsp;</o=
:p></span></p></div><p class=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-=
fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><s=
pan lang=3DES-TRAD style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></=
span></p><div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3=
.0pt 0cm 0cm 0cm'><p class=3DMsoNormal style=3D'margin-left:35.4pt'><b><spa=
n style=3D'font-size:12.0pt;color:black'>De: </span></b><span style=3D'font=
-size:12.0pt;color:black'>Lorenzo Colitti &lt;lorenzo=3D40google.com@dmarc.=
ietf.org&gt;<br><b>Fecha: </b>martes, 12 de junio de 2018, 12:13<br><b>Para: </b>&lt;jordi.palet@consul=
intel.es&gt;<br><b>CC: </b>&quot;v6ops@ietf.org WG&quot; &lt;v6ops@ietf.org=
&gt;<br><b>Asunto: </b>Re: [v6ops] updating RFC8026 to support 464XLAT in d=
raft-ietf-v6ops-transition-ipv4aas<o:p></o:p></span></p></div><div><p class=
=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div><div><=
div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>On Mon, Jun 11, =
2018 at 9:55 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:40=
consulintel.es@dmarc.ietf.org">40consulintel.es@dmarc.ietf.org</a>&gt; wrot=
e:<o:p></o:p></p></div><blockquote style=3D'border:none;border-left:solid #=
CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'>=
<div><div><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;=
padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0=
cm;margin-bottom:5.0pt'><div><div><p class=3DMsoNormal style=3D'mso-margin-=
top-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'>The point is th=
e ISP to be able to turn on or off each mechanism (464XLAT, MAP, DS-Lite, e=
tc.), and this is easily done if all them share the same DHCP option.&nbsp;=
<o:p></o:p></p></div></div></blockquote><div><p class=3DMsoNormal style=3D'=
mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'>The =
ISP can easily turn off 464xlat via DHCPv6 today: just provide DNS servers =
that don't do DNS64 translation.<o:p></o:p></p></div><div><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left=
:35.4pt'>&nbsp;<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-=
alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>=
No, that is not a solution, at least not for the scope of what is needed in=
 this document.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-marg=
in-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=
=3DEN-US>You can run 464XLAT without DNS64, so to avoid breaking DNSSEC, so=
 that will not work.</span><o:p></o:p></p></div></div></div></blockquote><d=
iv><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p><=
/div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>If you don't us=
e DNS64 you can't use 464xlat at all, because you can't communicate the pla=
t prefix to the clat.<o:p></o:p></p></div><div><p class=3DMsoNormal style=
=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div><blockquote style=3D'bor=
der:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-l=
eft:4.8pt;margin-right:0cm'><div><div><div><p class=3DMsoNormal style=3D'ms=
o-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span =
lang=3DEN-US>Also, users tend to change their DNS servers, so once more thi=
s doesn=E2=80=99t work.</span>&nbsp;<o:p></o:p></p></div></div></div></bloc=
kquote><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</=
o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>Per th=
e above: if the users change the DNS servers, 464xlat will stop working reg=
ardless of what the ISP says.<o:p></o:p></p></div><blockquote style=3D'bord=
er:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-le=
ft:4.8pt;margin-right:0cm'><div><div><blockquote style=3D'border:none;borde=
r-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;marg=
in-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><div><div><p class=3DMso=
Normal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-l=
eft:70.8pt'><span lang=3DEN-US>I will like to understand if we still have s=
uch opposition, why.</span>&nbsp;<o:p></o:p></p></div></div></blockquote><d=
iv><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto;margin-left:70.8pt'>Because it requires additional standards work,=
 engineering work and implementation complexity to achieve something that i=
s already possible today using RFC 7050.<o:p></o:p></p><p class=3DMsoNormal=
 style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:35=
.4pt'>&nbsp;<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt=
:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>I believe you=E2=80=99re misunderstanding what is needed here. I=E2=80=
=99m not talking about a new DHCPv6 way to =E2=80=9Cfind=E2=80=9D the NAT64=
 prefix or server. This is already done by RFC7050 or RFC7225 (PCP). </span=
><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>It is not a NE=
W DHCPv6 protocol. Is a new option code in an existing protocol (RFC8026). =
There is nothing new to develop. We just need to tell IANA =E2=80=9Cin addi=
tion to the already defined option codes for DS-LITE, MAP, etc., define one=
 for 464XLAT=E2=80=9D.</span><o:p></o:p></p></div></div></div></blockquote>=
<div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p=
></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>I still don't=
 see a use case for this. If an operator uses 464xlat, they must use RFC 70=
50 to provision it because there is no other mechanism. Additionally, if th=
e user changes the DNS server to a non-DNS64 server, 464xlat stops working,=
 and if the user changes the DNS server to a DNS64 server that doesn't hand=
 out the operator's NAT64 prefix, 464xlat stops working or only works subop=
timally. There is nothing the operator can do about this except accept the =
breakage or prevent the user from changing the DNS server.<o:p></o:p></p></=
div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p=
></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>Therefore=
, I think the following covers all cases:<o:p></o:p></p></div><div><ol star=
t=3D1 type=3D1><li class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto;mso-list:l0 level1 lfo2'>If the operator wants to ena=
ble 464xlat: they should hand out a DNS64 to the CPE.<o:p></o:p></li></ol><=
p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:=
auto;margin-left:71.4pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if =
!supportLists]><span style=3D'mso-list:Ignore'>2.<span style=3D'font:7.0pt =
"Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><![en=
dif]>If the operator wants to disable&nbsp;464xlat: they should NOT hand ou=
t a DNS64 to the CPE.<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margi=
n-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:71.4pt;text-indent:-1=
8.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span style=3D'mso-list=
:Ignore'>3.<span style=3D'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&=
nbsp;&nbsp;&nbsp; </span></span><![endif]>If the operator uses 464xlat, the=
y should not allow the user to change the DNS server.<o:p></o:p></p></div><=
/div></div></div><br>**********************************************<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
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copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
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ted, will be considered a criminal offense, so you must reply to the origin=
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Date: Tue, 12 Jun 2018 12:48:07 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Philip Homburg <pch-v6ops-8@u-1.phicoh.com>, <v6ops@ietf.org>
Message-ID: <B0A270B7-57C4-4CDD-9026-C90212BFE60F@consulintel.es>
Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <m1fSMYD-0000FrC@stereo.hq.phicoh.net> <1E283759-AB5E-4D0A-A6E6-2A06B95E7D6C@consulintel.es> <m1fSNAr-0000FDC@stereo.hq.phicoh.net> <980A4003-336C-4B99-BFD2-725B261F40BA@consulintel.es> <m1fSPoO-0000FqC@stereo.hq.phicoh.net> <D327A7C2-4ECC-417A-AC29-25A0573FDF6C@consulintel.es> <m1fSfzF-0000IRC@stereo.hq.phicoh.net>
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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I think my earlier email to Lorenzo provides answers to most of this ... but

    > I see your point, but
    > what an operator need is a "100% sure" way to make sure that they
    > can tell the CPE to not use a specific transition mechanism (which
    > for the other mechanisms we have with RFC8026).
    > 
    > So, assuming that DNS64 is only there if combined with NAT64 is
    > not "safe 100%" because if using CLAT, you can avoid having a DNS64
    > (this is the one that breaks DNSSEC, in case I wrote it incorrectly
    > before).
    
    I'm saying that if an operator uses DNS64 to signal the presence of NAT64,
    then that is a reliable signal that doesn't need an additional DHCP option.
    
    So if is safe for a CPE to just do RFC7050, because if DNS64 is detected,
    you can be sure that the operator wants the CPE to use NAT64.

As said, you can use the CLAT w/o DNS64, so it is not a safe way to detect the CPE should use or not the NAT64.
    
    > But if the user changed the DNS in the CPE (which is quite common),
    > there will not be DNS64 and still may be the ISP want to have the
    > CLAT running, because is using that for the IPv4 service for that
    > particular customer.
    
    Yeah, what if the user changes settings? Maybe the CPE has a way to force 
    NAT64 on. What do you do then? All bets are off when users start changing
    settings.

An operator wants to make it as proof as possible to user changes. A user has no interest in changing the status of NAT64 (probably they don't know what it means), but they have interested in changing the DNS, because many apps or web sites tell them to change it.
    
    In the context of RFC7050, the CPE can opt to use the original resolvers
    provided by upstream to figure out the translation prefix.
    
    Note that if the CPE uses resolvers configured by the user for RFC7050, then
    is it quite possible that the translation prefix is not discovered (for example
    if the user configures a well known public resolver). Or worse, 
    the user may configure a DNS64 resolver that uses a different prefix.

Right, that's one case, using an alternative DNS64, which will bring alternative NAT64, unless/or the operator is using PCP for the NAT64 provisioning.
    
    > If you agree that the CPE may request a PCP option, etc., then
    > request the S46, I think you are in agreement that we need the S46
    > priority option codes for all the mechanism that we are asking to
    > be supported by the CPE, right?
    
    To the extent that RFC8026 is incomplete, that should be fixed. However as
    Section 2.2 describes, what S46 offers can be done already be done by the
    DHCPv6 server. So S46 just provides a relative priority of different
    mechanisms, not an on/off switch for NAT64.
    
What it makes this work is the combination of RFC8026 and the CPE behavior. The idea is to have a S46 option to provide a priority in a list of "possible" transition mechanism to a given CPE. If the operator doesn't want that a specific CPE uses NAT64, then the S46 will not contain that option, so the CE will not use it, because will not have a match (even if the CPE is able to use 464XLAT). Not sure if this explanation clarify it ? I'm working on the precise text for that in the ID ...

    



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From: Richard Patterson <richard@helix.net.nz>
Date: Tue, 12 Jun 2018 12:11:01 +0100
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Subject: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-01.txt
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A new version of draft-patterson-intarea-ipoe-health has been posted.

The major change since -00, is the inclusion and preference of BFD
Echo as the health check mechanism when available.
The draft now has an informational reference to Broadband Forum's
TR-146 document which also discusses this problem.

The authors believe that this draft builds on the method suggested in
TR-146 in the following ways:
- Prefers BFD Echo, but allows for ARP/ND methods when not available.
- Defaults to DHCP renew as an action, but specifies optional
alternative actions to expedite recovery.
- Provides a DHCP Option to allow network administrators to signal
parameters dynamically to CEs.


=EF=BB=BFOn 12/06/2018, 10:11, "internet-drafts@ietf.org"
<internet-drafts@ietf.org> wrote:


    A new version of I-D, draft-patterson-intarea-ipoe-health-01.txt
    has been successfully submitted by Richard Patterson and posted to the
    IETF repository.

    Name:draft-patterson-intarea-ipoe-health
    Revision:01
    Title:IPoE Client Health Checking
    Document date:2018-06-12
    Group:Individual Submission
    Pages:12
    URL:
https://www.ietf.org/internet-drafts/draft-patterson-intarea-ipoe-health-01=
.txt
    Status:
https://datatracker.ietf.org/doc/draft-patterson-intarea-ipoe-health/
    Htmlized:
https://tools.ietf.org/html/draft-patterson-intarea-ipoe-health-01
    Htmlized:
https://datatracker.ietf.org/doc/html/draft-patterson-intarea-ipoe-health
    Diff:
https://www.ietf.org/rfcdiff?url2=3Ddraft-patterson-intarea-ipoe-health-01

    Abstract:
       PPP over Ethernet clients have the functionality to detect path
       unavailability by using PPP Keepalives.  IP over Ethernet does not
       have this functionality, and it's not specified when an IP over
       Ethernet client should consider its WAN connectivity down, unless
       there is a physical layer link down event.

       This document describes a way for IP over Ethernet clients to achiev=
e
       connectivity validation, similar to that of PPP over Ethernet, by
       using BFD Echo, or ARP and Neighbor Discovery functions.




    Please note that it may take a couple of minutes from the time of submi=
ssion
    until the htmlized version and diff are available at tools.ietf.org.

    The IETF Secretariat


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From: "Bernie Volz (volz)" <volz@cisco.com>
To: "Mudric, Dusan (Dusan)" <dmudric@avaya.com>, Richard Patterson <richard@helix.net.nz>, "v6ops@ietf.org list" <v6ops@ietf.org>
Thread-Topic: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-01.txt
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Subject: Re: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-01.txt
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Subject: Re: [v6ops] IETF 102 Agenda
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I'm also supportive of the WG taking this on and discussing on the agenda
in IETF102.

On Mon, Jun 11, 2018 at 3:48 PM, Templin (US), Fred L <
Fred.L.Templin@boeing.com> wrote:

> Hi Fred,
>
> There was a similar question back in the March 2018 timeframe, and there
> were
> several responses in support. The document was then presented remotely at
> IETF101, but there was no time left over for questions afterwards.
>
> I am planning to attend IETF102 in person, so would be better able to
> interact
> and get  a sense of the room.
>
> Thanks - Fred
>
> > -----Original Message-----
> > From: Fred Baker [mailto:fredbaker.ietf@gmail.com]
> > Sent: Monday, June 11, 2018 11:47 AM
> > To: Templin (US), Fred L <Fred.L.Templin@boeing.com>
> > Cc: v6ops@ietf.org list <v6ops@ietf.org>
> > Subject: Re: [v6ops] IETF 102 Agenda
> >
> > On Jun 11, 2018, at 9:59 AM, Templin (US), Fred L <
> Fred.L.Templin@boeing.com> wrote:
> > > Hi Fred,
> > >
> > > 'draft-templin-v6ops-pdhost' has been updated, and received list
> traffic both
> > > before and after the update was posted. Please add to the agenda.
> > >
> > > Thanks - Fred
> >
> > Hi. I'm looking at the discussion post-IETF-101, and looking for someone
> saying "I support this draft. I think it describes something I
> > want to deploy in my network." This is an operational working group; I'm
> looking especially for comments from network operators.
> > This is a discussion you and I have had a number of times. What the
> chairs want to give agenda time to is drafts that the working group
> > participants find useful and interesting. We gauge that from list
> discussion. So it's not "number of comments, when comments are
> > specifically solicited, exceed zero", but "someone said it was useful
> and interesting in their deployment".
> >
> > Since IETF 101, we have had two threads on the subject of pdhost. I
> initiated "let's discuss this" in late April:
> > https://www.ietf.org/mail-archive/web/v6ops/current/msg29222.html.
> >
> > In that thread, we had comments from
> >   - Dusan Medric, who wondered whether there was a discussion of
> allocating a prefix (such as a /64) to a host,
> >   - Joe Touch, Mark Smith, and Ole Troan regarding the distinction a
> "weak" and a "strong" host and between a "platform", a "router",
> > a "host", and a "node", and
> >   - Alexandre Petrescu, on the utility in his IOT MIPv6 network.
> >
> > I initiated another after your update on 29 May (
> https://www.ietf.org/mail-archive/web/v6ops/current/msg29275.html). In
> that, you
> > and Alexandre Petrescu discussed the utility of this in his IOT
> environment, in which he wanted to use RFC 3633 to delegate a prefix to
> > an IOT router for use in an enclave in his network. You and he disagreed
> on what was to be done with the delegated prefix.
> >
> > I'm still looking for a comment from a working group participant saying
> s/he finds draft-templin-v6ops-pdhost, in its 21st revision,
> > "useful and interesting". What I see is 14 emails since IETF 101, many
> of which you responded to, from people who fundamentally
> > disagreed with you on one point or another.
> >
> > General comment to those on the CC line: if this draft describes
> something useful to you in your network, your comment can
> > dramatically change the conversation between Fred and myself.
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>

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<div dir=3D"ltr">I&#39;m also supportive of the WG taking this on and discu=
ssing on the agenda in IETF102.<br></div><div class=3D"gmail_extra"><br><di=
v class=3D"gmail_quote">On Mon, Jun 11, 2018 at 3:48 PM, Templin (US), Fred=
 L <span dir=3D"ltr">&lt;<a href=3D"mailto:Fred.L.Templin@boeing.com" targe=
t=3D"_blank">Fred.L.Templin@boeing.com</a>&gt;</span> wrote:<br><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex">Hi Fred,<br>
<br>
There was a similar question back in the March 2018 timeframe, and there we=
re<br>
several responses in support. The document was then presented remotely at<b=
r>
IETF101, but there was no time left over for questions afterwards.<br>
<br>
I am planning to attend IETF102 in person, so would be better able to inter=
act<br>
and get=C2=A0 a sense of the room.<br>
<span class=3D"im HOEnZb"><br>
Thanks - Fred<br>
<br>
&gt; -----Original Message-----<br>
</span><div class=3D"HOEnZb"><div class=3D"h5">&gt; From: Fred Baker [mailt=
o:<a href=3D"mailto:fredbaker.ietf@gmail.com">fredbaker.ietf@gmail.<wbr>com=
</a>]<br>
&gt; Sent: Monday, June 11, 2018 11:47 AM<br>
&gt; To: Templin (US), Fred L &lt;<a href=3D"mailto:Fred.L.Templin@boeing.c=
om">Fred.L.Templin@boeing.com</a>&gt;<br>
&gt; Cc: <a href=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a> list &lt;<a h=
ref=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a>&gt;<br>
&gt; Subject: Re: [v6ops] IETF 102 Agenda<br>
&gt; <br>
&gt; On Jun 11, 2018, at 9:59 AM, Templin (US), Fred L &lt;<a href=3D"mailt=
o:Fred.L.Templin@boeing.com">Fred.L.Templin@boeing.com</a>&gt; wrote:<br>
&gt; &gt; Hi Fred,<br>
&gt; &gt;<br>
&gt; &gt; &#39;draft-templin-v6ops-pdhost&#39; has been updated, and receiv=
ed list traffic both<br>
&gt; &gt; before and after the update was posted. Please add to the agenda.=
<br>
&gt; &gt;<br>
&gt; &gt; Thanks - Fred<br>
&gt; <br>
&gt; Hi. I&#39;m looking at the discussion post-IETF-101, and looking for s=
omeone saying &quot;I support this draft. I think it describes something I<=
br>
&gt; want to deploy in my network.&quot; This is an operational working gro=
up; I&#39;m looking especially for comments from network operators.<br>
&gt; This is a discussion you and I have had a number of times. What the ch=
airs want to give agenda time to is drafts that the working group<br>
&gt; participants find useful and interesting. We gauge that from list disc=
ussion. So it&#39;s not &quot;number of comments, when comments are<br>
&gt; specifically solicited, exceed zero&quot;, but &quot;someone said it w=
as useful and interesting in their deployment&quot;.<br>
&gt; <br>
&gt; Since IETF 101, we have had two threads on the subject of pdhost. I in=
itiated &quot;let&#39;s discuss this&quot; in late April:<br>
&gt; <a href=3D"https://www.ietf.org/mail-archive/web/v6ops/current/msg2922=
2.html" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/mail-<wbr=
>archive/web/v6ops/current/<wbr>msg29222.html</a>.<br>
&gt; <br>
&gt; In that thread, we had comments from<br>
&gt;=C2=A0 =C2=A0- Dusan Medric, who wondered whether there was a discussio=
n of allocating a prefix (such as a /64) to a host,<br>
&gt;=C2=A0 =C2=A0- Joe Touch, Mark Smith, and Ole Troan regarding the disti=
nction a &quot;weak&quot; and a &quot;strong&quot; host and between a &quot=
;platform&quot;, a &quot;router&quot;,<br>
&gt; a &quot;host&quot;, and a &quot;node&quot;, and<br>
&gt;=C2=A0 =C2=A0- Alexandre Petrescu, on the utility in his IOT MIPv6 netw=
ork.<br>
&gt; <br>
&gt; I initiated another after your update on 29 May (<a href=3D"https://ww=
w.ietf.org/mail-archive/web/v6ops/current/msg29275.html" rel=3D"noreferrer"=
 target=3D"_blank">https://www.ietf.org/mail-<wbr>archive/web/v6ops/current=
/<wbr>msg29275.html</a>). In that, you<br>
&gt; and Alexandre Petrescu discussed the utility of this in his IOT enviro=
nment, in which he wanted to use RFC 3633 to delegate a prefix to<br>
&gt; an IOT router for use in an enclave in his network. You and he disagre=
ed on what was to be done with the delegated prefix.<br>
&gt; <br>
&gt; I&#39;m still looking for a comment from a working group participant s=
aying s/he finds draft-templin-v6ops-pdhost, in its 21st revision,<br>
&gt; &quot;useful and interesting&quot;. What I see is 14 emails since IETF=
 101, many of which you responded to, from people who fundamentally<br>
&gt; disagreed with you on one point or another.<br>
&gt; <br>
&gt; General comment to those on the CC line: if this draft describes somet=
hing useful to you in your network, your comment can<br>
&gt; dramatically change the conversation between Fred and myself.<br>
<br>
</div></div><div class=3D"HOEnZb"><div class=3D"h5">_______________________=
_______<wbr>_________________<br>
v6ops mailing list<br>
<a href=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/v6ops</a><br>
</div></div></blockquote></div><br></div>

--000000000000649817056e73b307--


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From: Richard Patterson <richard@helix.net.nz>
Date: Tue, 12 Jun 2018 16:57:28 +0100
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To: "v6ops@ietf.org list" <v6ops@ietf.org>, dmudric@avaya.com
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Subject: Re: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-01.txt
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Hi Dusan,

Thanks for the review, responses in-line:

On Tue, 12 Jun 2018 at 16:07, Mudric, Dusan (Dusan) <dmudric@avaya.com> wrote:
>
> Hi Richard,
>
> "4.3.  Behaviour 2: Expire Lease"
>
> Typo: Behavior
[RP] Isn't British spelling accepted as long as it's consistent
throughout the document?  I can s/behaviour/behavior/ if required.

> - Is this option an attempt for the lease RENEW-al but not using RENEW?
[RP] This action is for when the subscriber state in the network has
been lost, regular RENEWs will likely be dropped by the network, until
the network can authenticate the IPoE Client again, which is usually
done based on a DHCPv4 DISCOVER or DHCPv6 SOLICIT.

> - If not, what is the benefit of not sending RELEASE?
[RP]  A Release instructs the DHCP server to relinquish the lease
entirely.  Avoiding this step allows a client to potentially rebind
the previously leased IP/prefix, which can reduce the customer
experience impact when operating with dynamic leases.

> - If yes, is DHCPv6 client going to send the same address in SOLICIT? Is DHCPv6 client going to unicast SOLICIT to the same DHCPv6 server, if OPTION_UNICAST was set for the lease?
[RP] This document relies on existing DHCP messaging, and we don't
want to adjust that behaviour.  I don't believe anything in 3315
specifies that a SOLICIT could be unicast following a lease
expiration?  I believe OPTION_UNICAST is for just in-life messaging as
opposed to server discovery, but I could be wrong.
The client can include the previously leased prefix in the REQUEST,
the server may accept it if it's available, or NAK it.

To simplify adoption we've attempted to reuse existing functionality
where possible, hence the use or ARP/ND and just adjusting the T1/T2
timers to trigger the usual DHCP processes.

Given the above, Dusan, do you think the wording in the draft needs
clarification?

-Richard


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From: "Mudric, Dusan (Dusan)" <dmudric@avaya.com>
To: Richard Patterson <richard@helix.net.nz>, "v6ops@ietf.org list" <v6ops@ietf.org>
Thread-Topic: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-01.txt
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Date: Tue, 12 Jun 2018 17:54:18 -0300 (ART)
From: Alejandro D'Egidio <adegidio@telecentro.net.ar>
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Thread-Topic: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Hello,
First at all, I've read all the thread and I think this is a very useful di=
scussion.
I work in a cable operator and I think 464XLAT is a great idea to be includ=
ed in CPEs. So, everything related to that is interesting for me.
I have some questions:
1- Why the RFC8026 can include Option Codes for many transition methods and=
 not for 464XLAT?
2- Why we can't have an alternative to RFC7050 and RFC7225?
3- What if some CPEs works fine with some RFCs and not with other? Shouldn'=
t be better to have alternatives? It's really common to have many Bugs in C=
PEs specially with new protocols. They can say they support some RFC but it=
 doesn't work and you will need to wait some months (if you're lucky) to ge=
t the solution.
4- In our cablemodems we doesn't allow to customer to modify DNS configurat=
ion but, what about if customer change cablemodem to Bridge Mode and connec=
ts it's own CPE? This is a usual case where you can't control DNS configura=
tion but you still want to use 464XLAT.


Thanks and Regards,

ALEJANDRO D'EGIDIO=20
Jefe de Ingenier=C3=ADa de Backbone=20
F: +54 11 3977 1025=C2=A0 | M: +54 911 5794 1589=20
Lavard=C3=A9n 157. Piso 3. CABA (C1437FBC)

----- Mensaje original -----
De: "JORDI PALET MARTINEZ" <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
Para: "Philip Homburg" <pch-v6ops-8@u-1.phicoh.com>, v6ops@ietf.org
Enviados: Martes, 12 de Junio 2018 7:48:07
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

I think my earlier email to Lorenzo provides answers to most of this ... bu=
t

    > I see your point, but
    > what an operator need is a "100% sure" way to make sure that they
    > can tell the CPE to not use a specific transition mechanism (which
    > for the other mechanisms we have with RFC8026).
    >=20
    > So, assuming that DNS64 is only there if combined with NAT64 is
    > not "safe 100%" because if using CLAT, you can avoid having a DNS64
    > (this is the one that breaks DNSSEC, in case I wrote it incorrectly
    > before).
   =20
    I'm saying that if an operator uses DNS64 to signal the presence of NAT=
64,
    then that is a reliable signal that doesn't need an additional DHCP opt=
ion.
   =20
    So if is safe for a CPE to just do RFC7050, because if DNS64 is detecte=
d,
    you can be sure that the operator wants the CPE to use NAT64.

As said, you can use the CLAT w/o DNS64, so it is not a safe way to detect =
the CPE should use or not the NAT64.
   =20
    > But if the user changed the DNS in the CPE (which is quite common),
    > there will not be DNS64 and still may be the ISP want to have the
    > CLAT running, because is using that for the IPv4 service for that
    > particular customer.
   =20
    Yeah, what if the user changes settings? Maybe the CPE has a way to for=
ce=20
    NAT64 on. What do you do then? All bets are off when users start changi=
ng
    settings.

An operator wants to make it as proof as possible to user changes. A user h=
as no interest in changing the status of NAT64 (probably they don't know wh=
at it means), but they have interested in changing the DNS, because many ap=
ps or web sites tell them to change it.
   =20
    In the context of RFC7050, the CPE can opt to use the original resolver=
s
    provided by upstream to figure out the translation prefix.
   =20
    Note that if the CPE uses resolvers configured by the user for RFC7050,=
 then
    is it quite possible that the translation prefix is not discovered (for=
 example
    if the user configures a well known public resolver). Or worse,=20
    the user may configure a DNS64 resolver that uses a different prefix.

Right, that's one case, using an alternative DNS64, which will bring altern=
ative NAT64, unless/or the operator is using PCP for the NAT64 provisioning=
.
   =20
    > If you agree that the CPE may request a PCP option, etc., then
    > request the S46, I think you are in agreement that we need the S46
    > priority option codes for all the mechanism that we are asking to
    > be supported by the CPE, right?
   =20
    To the extent that RFC8026 is incomplete, that should be fixed. However=
 as
    Section 2.2 describes, what S46 offers can be done already be done by t=
he
    DHCPv6 server. So S46 just provides a relative priority of different
    mechanisms, not an on/off switch for NAT64.
   =20
What it makes this work is the combination of RFC8026 and the CPE behavior.=
 The idea is to have a S46 option to provide a priority in a list of "possi=
ble" transition mechanism to a given CPE. If the operator doesn't want that=
 a specific CPE uses NAT64, then the S46 will not contain that option, so t=
he CE will not use it, because will not have a match (even if the CPE is ab=
le to use 464XLAT). Not sure if this explanation clarify it ? I'm working o=
n the precise text for that in the ID ...

   =20



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From: Mark Andrews <marka@isc.org>
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Date: Wed, 13 Jun 2018 11:29:31 +1000
References: <rt-4.2.9-2607-1515188710-296.989438-6-0@icann.org>
Cc: Michelle Cotton via RT <iana-questions@iana.org>
To: dnsop <dnsop@ietf.org>, "v6ops@ietf.org WG" <v6ops@ietf.org>
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Subject: [v6ops] Fwd: [IANA #989438] ipv4only.arpa's delegation should be insecure.
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The Domain Name Reservation Considerations in RFC 7050 do not cover =
whether
a delegation should be signed or not.  Due to that omission in =
constructing the set
of questions to be asked RFC 7050 fails when the client is behind a =
validating resolver
that has NO SPECIAL KNOWLEDGE of IPV4ONLY.ARPA.

There are 2 pieces of work that are required.
1) update the list of questions that need to be asked needs to include =
whether a delegation
    needs to be signed or not.
2) update RFC 7050 to include explicit instructions to say DO NOT sign =
IPV4ONLY.ARPA.

Item 1 is dnsop work as far as I can see.  Item 2, I think, should be =
v6ops work.

HOME.ARPA is a example of a unsigned delegation.
10.IN-ADDR.ARPA is a example of a unsigned delegation.

There is zero benefit in IPV4ONLY.ARPA being signed.  Its contents on =
the Internet
are well known.  The contents with NAT64 in using are well known except =
for the
AAAA query.  The answer to that query is *expected to change*.  That =
answer cannot
be validated.

Mark

> Begin forwarded message:
>=20
> From: "Michelle Cotton via RT" <iana-questions@iana.org>
> Subject: [IANA #989438] ipv4only.arpa's delegation should be insecure.
> Date: 6 January 2018 at 8:45:10 am AEDT
> To: marka@isc.org
> Reply-To: iana-questions@iana.org
>=20
> Hello,
>=20
> Following up on a thread from the end of the year.  Who will bring =
this to the DNSOps working group?  Will someone notify us if there is an =
consensus on a conclusion of what needs to be done?
>=20
> Thanks in advance.
>=20
> --Michelle Cotton
>=20
>=20
> On Sun Dec 10 22:40:29 2017, danwing@gmail.com wrote:
>> I had replied to the errata. I agree it warrants additional
>> discussion, and had also suggested same. Dnsops seems appropriate.
>>=20
>>=20
>>=20
>> The question is not to much where the attacker is, but what DNSSEC
>> guarantee is provided. DNS64 imagines the client could do its own
>> validation =E2=80=94 if it wanted.  To date, effectively zero clients =
seem to
>> want to do their own DNSSEC validation.
>>=20
>> -d
>>=20
>>> On Dec 10, 2017, at 11:13 AM, Savolainen, Teemu (Nokia-TECH/Tampere)
>>> <teemu.savolainen@nokia.com> wrote:
>>>=20
>>> Hi,
>>>=20
>>> Dan Wing seem to have moved to VMWare, but cc'ing him now with an
>>> email address I found from an I-D..
>>>=20
>>> I'm not really following IETF nowadays, so I don't know if this has
>>> been discussed.
>>>=20
>>> Also I'm not sure why ISPs couldn=E2=80=99t first verify the A =
response's
>>> validity and then generate AAAA response to the client as =
document...
>>> but I suppose it could be considered to be more proper action to
>>> modify insecure responses than secure responses. I'm just worried
>>> what happens if there's attacker between ISP and root, in which case
>>> the IPv4 address part of the response could be modified by attacker
>>> and then delivered to client in the ISP's synthetic AAAA record..
>>>=20
>>> So I cannot accept the errata straight away, but it should be
>>> discussed with people who are more experts on this than I am.
>>>=20
>>> Best regards,
>>>=20
>>> Teemu
>>>=20
>>>=20
>>> -----Original Message-----
>>> From: Michelle Cotton via RT [mailto:iana-questions-
>>> comment@iana.org]
>>> Sent: 9. joulukuuta 2017 1:22
>>> Cc: ietf@kuehlewind.net; spencerdawkins.ietf@gmail.com;
>>> jouni.nospam@gmail.com; Savolainen, Teemu (Nokia-TECH/Tampere)
>>> <teemu.savolainen@nokia.com>
>>> Subject: [IANA #989438] ipv4only.arpa's delegation should be
>>> insecure.
>>>=20
>>> Hello,
>>>=20
>>> Just checking to see if anyone had a chance to look at this.
>>> Dan Wing's email addressed bounced (dwing@cisco.com).
>>>=20
>>> Thanks,
>>> Michelle
>>>=20
>>>=20
>>>=20
>>>> On Tue Nov 28 14:43:00 2017, michelle.cotton wrote:
>>>> Hello Authors and Area Directors,
>>>>=20
>>>> We have received a message pointing out an errata report that would
>>>> modify the actions that were performed for RFC7050.
>>>>=20
>>>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc-
>>>> =
2Deditor.org_errata_eid5152&d=3DDwIGaQ&c=3DuilaK90D4TOVoH58JNXRgQ&r=3DIMDU=
0f3LtPMQf5XkZ06fNg&m=3DhjPiqrkJLcvBw1fuqRPXMX6h76vuapCYz_DxRRq7SkM&s=3DuCK=
CSggUUCCU7iPuRs-
>>>> usGcL3T69Fia9gTOy4UQwhLk&e=3D
>>>>=20
>>>> Has this report been discussed?  Will the result be an approved
>>>> errata
>>>> report or a new RFC?
>>>>=20
>>>> Thanks in advance.
>>>>=20
>>>> Michelle Cotton
>>>> Protocol Parameters Engagement Sr. Manager
>>>=20
>>>=20
>>>=20
>=20
>=20
>=20

--=20
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka@isc.org


--Apple-Mail=_5F9CB04F-A666-452E-85E9-4B0B867A3F0F
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	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">The&nbsp;<span style=3D"font-size: 1em;" class=3D"">Domain =
Name Reservation Considerations</span><span style=3D"font-size: 1em; =
font-weight: bold;" class=3D""> </span><span style=3D"font-size: 1em;" =
class=3D"">in RFC 7050 do not cover whether</span><div class=3D"">a =
delegation should be signed or not. &nbsp;Due to that omission in =
constructing the set</div><div class=3D"">of questions to be =
asked&nbsp;RFC 7050 fails when the client is behind a validating =
resolver</div><div class=3D"">that has NO SPECIAL KNOWLEDGE of =
IPV4ONLY.ARPA.</div><div class=3D""><br class=3D""></div><div =
class=3D"">There are 2 pieces of work that are required.</div><div =
class=3D"">1) update the list of questions that need to be asked needs =
to include whether a delegation</div><div class=3D"">&nbsp; &nbsp; needs =
to be signed or not.</div><div class=3D"">2) update&nbsp;RFC 7050 to =
include explicit instructions to say DO NOT sign =
IPV4ONLY.ARPA.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Item 1 is dnsop work as far as I can see. &nbsp;Item 2, I =
think, should be v6ops work.</div><div class=3D""><br =
class=3D""></div><div class=3D"">HOME.ARPA is a example of a unsigned =
delegation.</div><div class=3D"">10.IN-ADDR.ARPA is a example of a =
unsigned delegation.</div><div class=3D""><br class=3D""></div><div =
class=3D"">There is zero benefit in IPV4ONLY.ARPA being signed. =
&nbsp;Its contents on the Internet</div><div class=3D"">are well known. =
&nbsp;The contents with NAT64 in using are well known except for =
the</div><div class=3D"">AAAA query. &nbsp;The answer to that query is =
*expected to change*. &nbsp;That answer cannot</div><div class=3D"">be =
validated.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Mark</div><div class=3D""><div><br class=3D""><blockquote =
type=3D"cite" class=3D""><div class=3D"">Begin forwarded =
message:</div><br class=3D"Apple-interchange-newline"><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;" class=3D""><span style=3D"font-family: =
-webkit-system-font, Helvetica Neue, Helvetica, sans-serif; =
color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">From: =
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica =
Neue, Helvetica, sans-serif;" class=3D"">"Michelle Cotton via RT" &lt;<a =
href=3D"mailto:iana-questions@iana.org" =
class=3D"">iana-questions@iana.org</a>&gt;<br class=3D""></span></div><div=
 style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;" class=3D""><span style=3D"font-family: =
-webkit-system-font, Helvetica Neue, Helvetica, sans-serif; =
color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Subject: =
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica =
Neue, Helvetica, sans-serif;" class=3D""><b class=3D"">[IANA #989438] =
ipv4only.arpa's delegation should be insecure.</b><br =
class=3D""></span></div><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px;" class=3D""><span =
style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica, =
sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Date: =
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica =
Neue, Helvetica, sans-serif;" class=3D"">6 January 2018 at 8:45:10 am =
AEDT<br class=3D""></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=3D""><span=
 style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica, =
sans-serif; color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">To: =
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica =
Neue, Helvetica, sans-serif;" class=3D""><a href=3D"mailto:marka@isc.org" =
class=3D"">marka@isc.org</a><br class=3D""></span></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;" class=3D""><span style=3D"font-family: =
-webkit-system-font, Helvetica Neue, Helvetica, sans-serif; =
color:rgba(0, 0, 0, 1.0);" class=3D""><b class=3D"">Reply-To: =
</b></span><span style=3D"font-family: -webkit-system-font, Helvetica =
Neue, Helvetica, sans-serif;" class=3D""><a =
href=3D"mailto:iana-questions@iana.org" =
class=3D"">iana-questions@iana.org</a><br class=3D""></span></div><br =
class=3D""><div class=3D""><div class=3D"">Hello,<br class=3D""><br =
class=3D"">Following up on a thread from the end of the year. &nbsp;Who =
will bring this to the DNSOps working group? &nbsp;Will someone notify =
us if there is an consensus on a conclusion of what needs to be done?<br =
class=3D""><br class=3D"">Thanks in advance.<br class=3D""><br =
class=3D"">--Michelle Cotton<br class=3D""><br class=3D""><br =
class=3D"">On Sun Dec 10 22:40:29 2017, <a =
href=3D"mailto:danwing@gmail.com" class=3D"">danwing@gmail.com</a> =
wrote:<br class=3D""><blockquote type=3D"cite" class=3D"">I had replied =
to the errata. I agree it warrants additional<br class=3D"">discussion, =
and had also suggested same. Dnsops seems appropriate.<br class=3D""><br =
class=3D""><br class=3D""><br class=3D"">The question is not to much =
where the attacker is, but what DNSSEC<br class=3D"">guarantee is =
provided. DNS64 imagines the client could do its own<br =
class=3D"">validation =E2=80=94 if it wanted. &nbsp;To date, effectively =
zero clients seem to<br class=3D"">want to do their own DNSSEC =
validation.<br class=3D""><br class=3D"">-d<br class=3D""><br =
class=3D""><blockquote type=3D"cite" class=3D"">On Dec 10, 2017, at =
11:13 AM, Savolainen, Teemu (Nokia-TECH/Tampere)<br class=3D"">&lt;<a =
href=3D"mailto:teemu.savolainen@nokia.com" =
class=3D"">teemu.savolainen@nokia.com</a>&gt; wrote:<br class=3D""><br =
class=3D"">Hi,<br class=3D""><br class=3D"">Dan Wing seem to have moved =
to VMWare, but cc'ing him now with an<br class=3D"">email address I =
found from an I-D..<br class=3D""><br class=3D"">I'm not really =
following IETF nowadays, so I don't know if this has<br class=3D"">been =
discussed.<br class=3D""><br class=3D"">Also I'm not sure why ISPs =
couldn=E2=80=99t first verify the A response's<br class=3D"">validity =
and then generate AAAA response to the client as document...<br =
class=3D"">but I suppose it could be considered to be more proper action =
to<br class=3D"">modify insecure responses than secure responses. I'm =
just worried<br class=3D"">what happens if there's attacker between ISP =
and root, in which case<br class=3D"">the IPv4 address part of the =
response could be modified by attacker<br class=3D"">and then delivered =
to client in the ISP's synthetic AAAA record..<br class=3D""><br =
class=3D"">So I cannot accept the errata straight away, but it should =
be<br class=3D"">discussed with people who are more experts on this than =
I am.<br class=3D""><br class=3D"">Best regards,<br class=3D""><br =
class=3D"">Teemu<br class=3D""><br class=3D""><br class=3D"">-----Original=
 Message-----<br class=3D""> From: Michelle Cotton via RT =
[mailto:iana-questions-<br class=3D""><a href=3D"mailto:comment@iana.org" =
class=3D"">comment@iana.org</a>]<br class=3D"">Sent: 9. joulukuuta 2017 =
1:22<br class=3D"">Cc: <a href=3D"mailto:ietf@kuehlewind.net" =
class=3D"">ietf@kuehlewind.net</a>; <a =
href=3D"mailto:spencerdawkins.ietf@gmail.com" =
class=3D"">spencerdawkins.ietf@gmail.com</a>;<br class=3D""><a =
href=3D"mailto:jouni.nospam@gmail.com" =
class=3D"">jouni.nospam@gmail.com</a>; Savolainen, Teemu =
(Nokia-TECH/Tampere)<br class=3D"">&lt;<a =
href=3D"mailto:teemu.savolainen@nokia.com" =
class=3D"">teemu.savolainen@nokia.com</a>&gt;<br class=3D"">Subject: =
[IANA #989438] ipv4only.arpa's delegation should be<br =
class=3D"">insecure.<br class=3D""><br class=3D"">Hello,<br class=3D""><br=
 class=3D"">Just checking to see if anyone had a chance to look at =
this.<br class=3D"">Dan Wing's email addressed bounced (<a =
href=3D"mailto:dwing@cisco.com" class=3D"">dwing@cisco.com</a>).<br =
class=3D""><br class=3D"">Thanks,<br class=3D"">Michelle<br class=3D""><br=
 class=3D""><br class=3D""><br class=3D""><blockquote type=3D"cite" =
class=3D"">On Tue Nov 28 14:43:00 2017, michelle.cotton wrote:<br =
class=3D"">Hello Authors and Area Directors,<br class=3D""><br =
class=3D"">We have received a message pointing out an errata report that =
would<br class=3D"">modify the actions that were performed for =
RFC7050.<br class=3D""><br class=3D""><a =
href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc-" =
class=3D"">https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc-=
</a><br =
class=3D"">2Deditor.org_errata_eid5152&amp;d=3DDwIGaQ&amp;c=3DuilaK90D4TOV=
oH58JNXRgQ&amp;r=3DIMDU0f3LtPMQf5XkZ06fNg&amp;m=3DhjPiqrkJLcvBw1fuqRPXMX6h=
76vuapCYz_DxRRq7SkM&amp;s=3DuCKCSggUUCCU7iPuRs-<br =
class=3D"">usGcL3T69Fia9gTOy4UQwhLk&amp;e=3D<br class=3D""><br =
class=3D"">Has this report been discussed? &nbsp;Will the result be an =
approved<br class=3D"">errata<br class=3D"">report or a new RFC?<br =
class=3D""><br class=3D"">Thanks in advance.<br class=3D""><br =
class=3D"">Michelle Cotton<br class=3D"">Protocol Parameters Engagement =
Sr. Manager<br class=3D""></blockquote><br class=3D""><br class=3D""><br =
class=3D""></blockquote></blockquote><br class=3D""><br class=3D""><br =
class=3D""></div></div></blockquote></div><br class=3D""><div class=3D"">
--&nbsp;<br class=3D"">Mark Andrews, ISC<br class=3D"">1 Seymour St., =
Dundas Valley, NSW 2117, Australia<br class=3D"">PHONE: +61 2 9871 4742 =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;INTERNET: <a =
href=3D"mailto:marka@isc.org" class=3D"">marka@isc.org</a>

</div>
<br class=3D""></div></body></html>=

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Subject: Re: [v6ops] [IANA #989438] ipv4only.arpa's delegation should be insecure.
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Hi everyone,

Stuart and I have a draft that attempts to address these issues, please =
let us know if you think it does or doesn't.

https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-arpa =
<https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-arpa>

Thanks,
David Schinazi


> On Jun 12, 2018, at 18:29, Mark Andrews <marka@isc.org> wrote:
>=20
> The Domain Name Reservation Considerations in RFC 7050 do not cover =
whether
> a delegation should be signed or not.  Due to that omission in =
constructing the set
> of questions to be asked RFC 7050 fails when the client is behind a =
validating resolver
> that has NO SPECIAL KNOWLEDGE of IPV4ONLY.ARPA.
>=20
> There are 2 pieces of work that are required.
> 1) update the list of questions that need to be asked needs to include =
whether a delegation
>     needs to be signed or not.
> 2) update RFC 7050 to include explicit instructions to say DO NOT sign =
IPV4ONLY.ARPA.
>=20
> Item 1 is dnsop work as far as I can see.  Item 2, I think, should be =
v6ops work.
>=20
> HOME.ARPA is a example of a unsigned delegation.
> 10.IN-ADDR.ARPA is a example of a unsigned delegation.
>=20
> There is zero benefit in IPV4ONLY.ARPA being signed.  Its contents on =
the Internet
> are well known.  The contents with NAT64 in using are well known =
except for the
> AAAA query.  The answer to that query is *expected to change*.  That =
answer cannot
> be validated.
>=20
> Mark
>=20
>> Begin forwarded message:
>>=20
>> From: "Michelle Cotton via RT" <iana-questions@iana.org =
<mailto:iana-questions@iana.org>>
>> Subject: [IANA #989438] ipv4only.arpa's delegation should be =
insecure.
>> Date: 6 January 2018 at 8:45:10 am AEDT
>> To: marka@isc.org <mailto:marka@isc.org>
>> Reply-To: iana-questions@iana.org <mailto:iana-questions@iana.org>
>>=20
>> Hello,
>>=20
>> Following up on a thread from the end of the year.  Who will bring =
this to the DNSOps working group?  Will someone notify us if there is an =
consensus on a conclusion of what needs to be done?
>>=20
>> Thanks in advance.
>>=20
>> --Michelle Cotton
>>=20
>>=20
>> On Sun Dec 10 22:40:29 2017, danwing@gmail.com =
<mailto:danwing@gmail.com> wrote:
>>> I had replied to the errata. I agree it warrants additional
>>> discussion, and had also suggested same. Dnsops seems appropriate.
>>>=20
>>>=20
>>>=20
>>> The question is not to much where the attacker is, but what DNSSEC
>>> guarantee is provided. DNS64 imagines the client could do its own
>>> validation =E2=80=94 if it wanted.  To date, effectively zero =
clients seem to
>>> want to do their own DNSSEC validation.
>>>=20
>>> -d
>>>=20
>>>> On Dec 10, 2017, at 11:13 AM, Savolainen, Teemu =
(Nokia-TECH/Tampere)
>>>> <teemu.savolainen@nokia.com <mailto:teemu.savolainen@nokia.com>> =
wrote:
>>>>=20
>>>> Hi,
>>>>=20
>>>> Dan Wing seem to have moved to VMWare, but cc'ing him now with an
>>>> email address I found from an I-D..
>>>>=20
>>>> I'm not really following IETF nowadays, so I don't know if this has
>>>> been discussed.
>>>>=20
>>>> Also I'm not sure why ISPs couldn=E2=80=99t first verify the A =
response's
>>>> validity and then generate AAAA response to the client as =
document...
>>>> but I suppose it could be considered to be more proper action to
>>>> modify insecure responses than secure responses. I'm just worried
>>>> what happens if there's attacker between ISP and root, in which =
case
>>>> the IPv4 address part of the response could be modified by attacker
>>>> and then delivered to client in the ISP's synthetic AAAA record..
>>>>=20
>>>> So I cannot accept the errata straight away, but it should be
>>>> discussed with people who are more experts on this than I am.
>>>>=20
>>>> Best regards,
>>>>=20
>>>> Teemu
>>>>=20
>>>>=20
>>>> -----Original Message-----
>>>> From: Michelle Cotton via RT [mailto:iana-questions-
>>>> comment@iana.org <mailto:comment@iana.org>]
>>>> Sent: 9. joulukuuta 2017 1:22
>>>> Cc: ietf@kuehlewind.net <mailto:ietf@kuehlewind.net>; =
spencerdawkins.ietf@gmail.com <mailto:spencerdawkins.ietf@gmail.com>;
>>>> jouni.nospam@gmail.com <mailto:jouni.nospam@gmail.com>; Savolainen, =
Teemu (Nokia-TECH/Tampere)
>>>> <teemu.savolainen@nokia.com <mailto:teemu.savolainen@nokia.com>>
>>>> Subject: [IANA #989438] ipv4only.arpa's delegation should be
>>>> insecure.
>>>>=20
>>>> Hello,
>>>>=20
>>>> Just checking to see if anyone had a chance to look at this.
>>>> Dan Wing's email addressed bounced (dwing@cisco.com =
<mailto:dwing@cisco.com>).
>>>>=20
>>>> Thanks,
>>>> Michelle
>>>>=20
>>>>=20
>>>>=20
>>>>> On Tue Nov 28 14:43:00 2017, michelle.cotton wrote:
>>>>> Hello Authors and Area Directors,
>>>>>=20
>>>>> We have received a message pointing out an errata report that =
would
>>>>> modify the actions that were performed for RFC7050.
>>>>>=20
>>>>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc- =
<https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc->
>>>>> =
2Deditor.org_errata_eid5152&d=3DDwIGaQ&c=3DuilaK90D4TOVoH58JNXRgQ&r=3DIMDU=
0f3LtPMQf5XkZ06fNg&m=3DhjPiqrkJLcvBw1fuqRPXMX6h76vuapCYz_DxRRq7SkM&s=3DuCK=
CSggUUCCU7iPuRs-
>>>>> usGcL3T69Fia9gTOy4UQwhLk&e=3D
>>>>>=20
>>>>> Has this report been discussed?  Will the result be an approved
>>>>> errata
>>>>> report or a new RFC?
>>>>>=20
>>>>> Thanks in advance.
>>>>>=20
>>>>> Michelle Cotton
>>>>> Protocol Parameters Engagement Sr. Manager
>>>>=20
>>>>=20
>>>>=20
>>=20
>>=20
>>=20
>=20
> --=20
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742              INTERNET: marka@isc.org =
<mailto:marka@isc.org>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


--Boundary_(ID_qTOtcWP5HQnSzhlu9/Y4Rw)
Content-type: text/html; charset=utf-8
Content-transfer-encoding: quoted-printable

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hi =
everyone,<div class=3D""><br class=3D""></div><div class=3D"">Stuart and =
I have a draft that attempts to address these issues, please let us know =
if you think it does or doesn't.</div><div class=3D""><br =
class=3D""></div><div class=3D""><a =
href=3D"https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-arpa"=
 =
class=3D"">https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-ar=
pa</a></div><div class=3D""><br class=3D""></div><div =
class=3D"">Thanks,</div><div class=3D"">David Schinazi</div><div =
class=3D""><br class=3D""><div><br class=3D""><blockquote type=3D"cite" =
class=3D""><div class=3D"">On Jun 12, 2018, at 18:29, Mark Andrews =
&lt;<a href=3D"mailto:marka@isc.org" class=3D"">marka@isc.org</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><meta =
http-equiv=3D"Content-Type" content=3D"text/html charset=3Dutf-8" =
class=3D""><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space;" class=3D"">The&nbsp;<span =
style=3D"font-size: 1em;" class=3D"">Domain Name Reservation =
Considerations</span><span style=3D"font-size: 1em; font-weight: bold;" =
class=3D""> </span><span style=3D"font-size: 1em;" class=3D"">in RFC =
7050 do not cover whether</span><div class=3D"">a delegation should be =
signed or not. &nbsp;Due to that omission in constructing the =
set</div><div class=3D"">of questions to be asked&nbsp;RFC 7050 fails =
when the client is behind a validating resolver</div><div class=3D"">that =
has NO SPECIAL KNOWLEDGE of IPV4ONLY.ARPA.</div><div class=3D""><br =
class=3D""></div><div class=3D"">There are 2 pieces of work that are =
required.</div><div class=3D"">1) update the list of questions that need =
to be asked needs to include whether a delegation</div><div =
class=3D"">&nbsp; &nbsp; needs to be signed or not.</div><div =
class=3D"">2) update&nbsp;RFC 7050 to include explicit instructions to =
say DO NOT sign IPV4ONLY.ARPA.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Item 1 is dnsop work as far as I can =
see. &nbsp;Item 2, I think, should be v6ops work.</div><div class=3D""><br=
 class=3D""></div><div class=3D"">HOME.ARPA is a example of a unsigned =
delegation.</div><div class=3D"">10.IN-ADDR.ARPA is a example of a =
unsigned delegation.</div><div class=3D""><br class=3D""></div><div =
class=3D"">There is zero benefit in IPV4ONLY.ARPA being signed. =
&nbsp;Its contents on the Internet</div><div class=3D"">are well known. =
&nbsp;The contents with NAT64 in using are well known except for =
the</div><div class=3D"">AAAA query. &nbsp;The answer to that query is =
*expected to change*. &nbsp;That answer cannot</div><div class=3D"">be =
validated.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Mark</div><div class=3D""><div class=3D""><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D"">Begin =
forwarded message:</div><br class=3D"Apple-interchange-newline"><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;" class=3D""><span style=3D"font-family: =
-webkit-system-font, &quot;Helvetica Neue&quot;, Helvetica, sans-serif;" =
class=3D""><b class=3D"">From: </b></span><span style=3D"font-family: =
-webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" =
class=3D"">"Michelle Cotton via RT" &lt;<a =
href=3D"mailto:iana-questions@iana.org" =
class=3D"">iana-questions@iana.org</a>&gt;<br class=3D""></span></div><div=
 style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;" class=3D""><span style=3D"font-family: =
-webkit-system-font, &quot;Helvetica Neue&quot;, Helvetica, sans-serif;" =
class=3D""><b class=3D"">Subject: </b></span><span style=3D"font-family: =
-webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class=3D""><b=
 class=3D"">[IANA #989438] ipv4only.arpa's delegation should be =
insecure.</b><br class=3D""></span></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=3D""><span=
 style=3D"font-family: -webkit-system-font, &quot;Helvetica Neue&quot;, =
Helvetica, sans-serif;" class=3D""><b class=3D"">Date: </b></span><span =
style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica, =
sans-serif;" class=3D"">6 January 2018 at 8:45:10 am AEDT<br =
class=3D""></span></div><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px;" class=3D""><span =
style=3D"font-family: -webkit-system-font, &quot;Helvetica Neue&quot;, =
Helvetica, sans-serif;" class=3D""><b class=3D"">To: </b></span><span =
style=3D"font-family: -webkit-system-font, Helvetica Neue, Helvetica, =
sans-serif;" class=3D""><a href=3D"mailto:marka@isc.org" =
class=3D"">marka@isc.org</a><br class=3D""></span></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px;" class=3D""><span style=3D"font-family: =
-webkit-system-font, &quot;Helvetica Neue&quot;, Helvetica, sans-serif;" =
class=3D""><b class=3D"">Reply-To: </b></span><span style=3D"font-family: =
-webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class=3D""><a=
 href=3D"mailto:iana-questions@iana.org" =
class=3D"">iana-questions@iana.org</a><br class=3D""></span></div><br =
class=3D""><div class=3D""><div class=3D"">Hello,<br class=3D""><br =
class=3D"">Following up on a thread from the end of the year. &nbsp;Who =
will bring this to the DNSOps working group? &nbsp;Will someone notify =
us if there is an consensus on a conclusion of what needs to be done?<br =
class=3D""><br class=3D"">Thanks in advance.<br class=3D""><br =
class=3D"">--Michelle Cotton<br class=3D""><br class=3D""><br =
class=3D"">On Sun Dec 10 22:40:29 2017, <a =
href=3D"mailto:danwing@gmail.com" class=3D"">danwing@gmail.com</a> =
wrote:<br class=3D""><blockquote type=3D"cite" class=3D"">I had replied =
to the errata. I agree it warrants additional<br class=3D"">discussion, =
and had also suggested same. Dnsops seems appropriate.<br class=3D""><br =
class=3D""><br class=3D""><br class=3D"">The question is not to much =
where the attacker is, but what DNSSEC<br class=3D"">guarantee is =
provided. DNS64 imagines the client could do its own<br =
class=3D"">validation =E2=80=94 if it wanted. &nbsp;To date, effectively =
zero clients seem to<br class=3D"">want to do their own DNSSEC =
validation.<br class=3D""><br class=3D"">-d<br class=3D""><br =
class=3D""><blockquote type=3D"cite" class=3D"">On Dec 10, 2017, at =
11:13 AM, Savolainen, Teemu (Nokia-TECH/Tampere)<br class=3D"">&lt;<a =
href=3D"mailto:teemu.savolainen@nokia.com" =
class=3D"">teemu.savolainen@nokia.com</a>&gt; wrote:<br class=3D""><br =
class=3D"">Hi,<br class=3D""><br class=3D"">Dan Wing seem to have moved =
to VMWare, but cc'ing him now with an<br class=3D"">email address I =
found from an I-D..<br class=3D""><br class=3D"">I'm not really =
following IETF nowadays, so I don't know if this has<br class=3D"">been =
discussed.<br class=3D""><br class=3D"">Also I'm not sure why ISPs =
couldn=E2=80=99t first verify the A response's<br class=3D"">validity =
and then generate AAAA response to the client as document...<br =
class=3D"">but I suppose it could be considered to be more proper action =
to<br class=3D"">modify insecure responses than secure responses. I'm =
just worried<br class=3D"">what happens if there's attacker between ISP =
and root, in which case<br class=3D"">the IPv4 address part of the =
response could be modified by attacker<br class=3D"">and then delivered =
to client in the ISP's synthetic AAAA record..<br class=3D""><br =
class=3D"">So I cannot accept the errata straight away, but it should =
be<br class=3D"">discussed with people who are more experts on this than =
I am.<br class=3D""><br class=3D"">Best regards,<br class=3D""><br =
class=3D"">Teemu<br class=3D""><br class=3D""><br class=3D"">-----Original=
 Message-----<br class=3D""> From: Michelle Cotton via RT =
[mailto:iana-questions-<br class=3D""><a href=3D"mailto:comment@iana.org" =
class=3D"">comment@iana.org</a>]<br class=3D"">Sent: 9. joulukuuta 2017 =
1:22<br class=3D"">Cc: <a href=3D"mailto:ietf@kuehlewind.net" =
class=3D"">ietf@kuehlewind.net</a>; <a =
href=3D"mailto:spencerdawkins.ietf@gmail.com" =
class=3D"">spencerdawkins.ietf@gmail.com</a>;<br class=3D""><a =
href=3D"mailto:jouni.nospam@gmail.com" =
class=3D"">jouni.nospam@gmail.com</a>; Savolainen, Teemu =
(Nokia-TECH/Tampere)<br class=3D"">&lt;<a =
href=3D"mailto:teemu.savolainen@nokia.com" =
class=3D"">teemu.savolainen@nokia.com</a>&gt;<br class=3D"">Subject: =
[IANA #989438] ipv4only.arpa's delegation should be<br =
class=3D"">insecure.<br class=3D""><br class=3D"">Hello,<br class=3D""><br=
 class=3D"">Just checking to see if anyone had a chance to look at =
this.<br class=3D"">Dan Wing's email addressed bounced (<a =
href=3D"mailto:dwing@cisco.com" class=3D"">dwing@cisco.com</a>).<br =
class=3D""><br class=3D"">Thanks,<br class=3D"">Michelle<br class=3D""><br=
 class=3D""><br class=3D""><br class=3D""><blockquote type=3D"cite" =
class=3D"">On Tue Nov 28 14:43:00 2017, michelle.cotton wrote:<br =
class=3D"">Hello Authors and Area Directors,<br class=3D""><br =
class=3D"">We have received a message pointing out an errata report that =
would<br class=3D"">modify the actions that were performed for =
RFC7050.<br class=3D""><br class=3D""><a =
href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc-" =
class=3D"">https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc-=
</a><br =
class=3D"">2Deditor.org_errata_eid5152&amp;d=3DDwIGaQ&amp;c=3DuilaK90D4TOV=
oH58JNXRgQ&amp;r=3DIMDU0f3LtPMQf5XkZ06fNg&amp;m=3DhjPiqrkJLcvBw1fuqRPXMX6h=
76vuapCYz_DxRRq7SkM&amp;s=3DuCKCSggUUCCU7iPuRs-<br =
class=3D"">usGcL3T69Fia9gTOy4UQwhLk&amp;e=3D<br class=3D""><br =
class=3D"">Has this report been discussed? &nbsp;Will the result be an =
approved<br class=3D"">errata<br class=3D"">report or a new RFC?<br =
class=3D""><br class=3D"">Thanks in advance.<br class=3D""><br =
class=3D"">Michelle Cotton<br class=3D"">Protocol Parameters Engagement =
Sr. Manager<br class=3D""></blockquote><br class=3D""><br class=3D""><br =
class=3D""></blockquote></blockquote><br class=3D""><br class=3D""><br =
class=3D""></div></div></blockquote></div><br class=3D""><div class=3D"">
--&nbsp;<br class=3D"">Mark Andrews, ISC<br class=3D"">1 Seymour St., =
Dundas Valley, NSW 2117, Australia<br class=3D"">PHONE: +61 2 9871 4742 =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;INTERNET: <a =
href=3D"mailto:marka@isc.org" class=3D"">marka@isc.org</a>

</div>
<br =
class=3D""></div></div>_______________________________________________<br =
class=3D"">v6ops mailing list<br class=3D""><a =
href=3D"mailto:v6ops@ietf.org" class=3D"">v6ops@ietf.org</a><br =
class=3D"">https://www.ietf.org/mailman/listinfo/v6ops<br =
class=3D""></div></blockquote></div><br class=3D""></div></body></html>=

--Boundary_(ID_qTOtcWP5HQnSzhlu9/Y4Rw)--


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References: <rt-4.2.9-2607-1515188710-296.989438-6-0@icann.org> <FAA35F1A-9AD4-4993-9A5C-53A6143B9DE7@isc.org> <43D81243-B2D8-4622-B03D-D20DB7EC243C@apple.com>
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Date: Tue, 12 Jun 2018 19:35:34 -0700
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To: David Schinazi <dschinazi@apple.com>
Cc: Mark Andrews <marka@isc.org>, Stuart Cheshire <cheshire@apple.com>,  Michelle Cotton via RT <iana-questions@iana.org>, dnsop <dnsop@ietf.org>,  "v6ops@ietf.org WG" <v6ops@ietf.org>
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Subject: Re: [v6ops] [DNSOP] [IANA #989438] ipv4only.arpa's delegation should be insecure.
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LGTM.   It sounds like Mark is arguing that RFC6761 also needs updated.
Possibly this document could do that, but it would need to be reframed a
bit.

On Tue, Jun 12, 2018 at 7:28 PM, David Schinazi <dschinazi@apple.com> wrote=
:

> Hi everyone,
>
> Stuart and I have a draft that attempts to address these issues, please
> let us know if you think it does or doesn't.
>
> https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-arpa
>
> Thanks,
> David Schinazi
>
>
> On Jun 12, 2018, at 18:29, Mark Andrews <marka@isc.org> wrote:
>
> The Domain Name Reservation Considerations in RFC 7050 do not cover
> whether
> a delegation should be signed or not.  Due to that omission in
> constructing the set
> of questions to be asked RFC 7050 fails when the client is behind a
> validating resolver
> that has NO SPECIAL KNOWLEDGE of IPV4ONLY.ARPA.
>
> There are 2 pieces of work that are required.
> 1) update the list of questions that need to be asked needs to include
> whether a delegation
>     needs to be signed or not.
> 2) update RFC 7050 to include explicit instructions to say DO NOT sign
> IPV4ONLY.ARPA.
>
> Item 1 is dnsop work as far as I can see.  Item 2, I think, should be
> v6ops work.
>
> HOME.ARPA is a example of a unsigned delegation.
> 10.IN-ADDR.ARPA is a example of a unsigned delegation.
>
> There is zero benefit in IPV4ONLY.ARPA being signed.  Its contents on the
> Internet
> are well known.  The contents with NAT64 in using are well known except
> for the
> AAAA query.  The answer to that query is *expected to change*.  That
> answer cannot
> be validated.
>
> Mark
>
> Begin forwarded message:
>
> *From: *"Michelle Cotton via RT" <iana-questions@iana.org>
> *Subject: **[IANA #989438] ipv4only.arpa's delegation should be insecure.=
*
> *Date: *6 January 2018 at 8:45:10 am AEDT
> *To: *marka@isc.org
> *Reply-To: *iana-questions@iana.org
>
> Hello,
>
> Following up on a thread from the end of the year.  Who will bring this t=
o
> the DNSOps working group?  Will someone notify us if there is an consensu=
s
> on a conclusion of what needs to be done?
>
> Thanks in advance.
>
> --Michelle Cotton
>
>
> On Sun Dec 10 22:40:29 2017, danwing@gmail.com wrote:
>
> I had replied to the errata. I agree it warrants additional
> discussion, and had also suggested same. Dnsops seems appropriate.
>
>
>
> The question is not to much where the attacker is, but what DNSSEC
> guarantee is provided. DNS64 imagines the client could do its own
> validation =E2=80=94 if it wanted.  To date, effectively zero clients see=
m to
> want to do their own DNSSEC validation.
>
> -d
>
> On Dec 10, 2017, at 11:13 AM, Savolainen, Teemu (Nokia-TECH/Tampere)
> <teemu.savolainen@nokia.com> wrote:
>
> Hi,
>
> Dan Wing seem to have moved to VMWare, but cc'ing him now with an
> email address I found from an I-D..
>
> I'm not really following IETF nowadays, so I don't know if this has
> been discussed.
>
> Also I'm not sure why ISPs couldn=E2=80=99t first verify the A response's
> validity and then generate AAAA response to the client as document...
> but I suppose it could be considered to be more proper action to
> modify insecure responses than secure responses. I'm just worried
> what happens if there's attacker between ISP and root, in which case
> the IPv4 address part of the response could be modified by attacker
> and then delivered to client in the ISP's synthetic AAAA record..
>
> So I cannot accept the errata straight away, but it should be
> discussed with people who are more experts on this than I am.
>
> Best regards,
>
> Teemu
>
>
> -----Original Message-----
> From: Michelle Cotton via RT [mailto:iana-questions-
> comment@iana.org]
> Sent: 9. joulukuuta 2017 1:22
> Cc: ietf@kuehlewind.net; spencerdawkins.ietf@gmail.com;
> jouni.nospam@gmail.com; Savolainen, Teemu (Nokia-TECH/Tampere)
> <teemu.savolainen@nokia.com>
> Subject: [IANA #989438] ipv4only.arpa's delegation should be
> insecure.
>
> Hello,
>
> Just checking to see if anyone had a chance to look at this.
> Dan Wing's email addressed bounced (dwing@cisco.com).
>
> Thanks,
> Michelle
>
>
>
> On Tue Nov 28 14:43:00 2017, michelle.cotton wrote:
> Hello Authors and Area Directors,
>
> We have received a message pointing out an errata report that would
> modify the actions that were performed for RFC7050.
>
> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc-
> 2Deditor.org_errata_eid5152&d=3DDwIGaQ&c=3DuilaK90D4TOVoH58JNXRgQ&r=3D
> IMDU0f3LtPMQf5XkZ06fNg&m=3DhjPiqrkJLcvBw1fuqRPXMX6h76vuapCYz_DxRRq7SkM&s=
=3D
> uCKCSggUUCCU7iPuRs-
> usGcL3T69Fia9gTOy4UQwhLk&e=3D
>
> Has this report been discussed?  Will the result be an approved
> errata
> report or a new RFC?
>
> Thanks in advance.
>
> Michelle Cotton
> Protocol Parameters Engagement Sr. Manager
>
>
>
>
>
>
>
>
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742              INTERNET: marka@isc.org
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>
>
>
> _______________________________________________
> DNSOP mailing list
> DNSOP@ietf.org
> https://www.ietf.org/mailman/listinfo/dnsop
>
>

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<div dir=3D"ltr">LGTM. =C2=A0 It sounds like Mark is arguing that RFC6761 a=
lso needs updated. =C2=A0 Possibly this document could do that, but it woul=
d need to be reframed a bit.</div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">On Tue, Jun 12, 2018 at 7:28 PM, David Schinazi <span dir=
=3D"ltr">&lt;<a href=3D"mailto:dschinazi@apple.com" target=3D"_blank">dschi=
nazi@apple.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div=
 style=3D"word-wrap:break-word;line-break:after-white-space">Hi everyone,<d=
iv><br></div><div>Stuart and I have a draft that attempts to address these =
issues, please let us know if you think it does or doesn&#39;t.</div><div><=
br></div><div><a href=3D"https://tools.ietf.org/html/draft-cheshire-sudn-ip=
v4only-dot-arpa" target=3D"_blank">https://tools.ietf.org/html/<wbr>draft-c=
heshire-sudn-ipv4only-<wbr>dot-arpa</a></div><div><br></div><div>Thanks,</d=
iv><div>David Schinazi</div><div><br><div><br><blockquote type=3D"cite"><di=
v><div class=3D"h5"><div>On Jun 12, 2018, at 18:29, Mark Andrews &lt;<a hre=
f=3D"mailto:marka@isc.org" target=3D"_blank">marka@isc.org</a>&gt; wrote:</=
div><br class=3D"m_450448756321154275Apple-interchange-newline"></div></div=
><div><div><div class=3D"h5"><div style=3D"word-wrap:break-word">The=C2=A0<=
span style=3D"font-size:1em">Domain Name Reservation Considerations</span><=
span style=3D"font-size:1em;font-weight:bold"> </span><span style=3D"font-s=
ize:1em">in RFC 7050 do not cover whether</span><div>a delegation should be=
 signed or not.=C2=A0 Due to that omission in constructing the set</div><di=
v>of questions to be asked=C2=A0RFC 7050 fails when the client is behind a =
validating resolver</div><div>that has NO SPECIAL KNOWLEDGE of IPV4ONLY.ARP=
A.</div><div><br></div><div>There are 2 pieces of work that are required.</=
div><div>1) update the list of questions that need to be asked needs to inc=
lude whether a delegation</div><div>=C2=A0 =C2=A0 needs to be signed or not=
.</div><div>2) update=C2=A0RFC 7050 to include explicit instructions to say=
 DO NOT sign IPV4ONLY.ARPA.</div><div><br></div><div>Item 1 is dnsop work a=
s far as I can see.=C2=A0 Item 2, I think, should be v6ops work.</div><div>=
<br></div><div>HOME.ARPA is a example of a unsigned delegation.</div><div>1=
0.IN-ADDR.ARPA is a example of a unsigned delegation.</div><div><br></div><=
div>There is zero benefit in IPV4ONLY.ARPA being signed.=C2=A0 Its contents=
 on the Internet</div><div>are well known.=C2=A0 The contents with NAT64 in=
 using are well known except for the</div><div>AAAA query.=C2=A0 The answer=
 to that query is *expected to change*.=C2=A0 That answer cannot</div><div>=
be validated.</div><div><br></div><div>Mark</div><div><div><br><blockquote =
type=3D"cite"><div>Begin forwarded message:</div><br class=3D"m_45044875632=
1154275Apple-interchange-newline"><div style=3D"margin-top:0px;margin-right=
:0px;margin-bottom:0px;margin-left:0px"><span style=3D"font-family:-webkit-=
system-font,&quot;Helvetica Neue&quot;,Helvetica,sans-serif"><b>From: </b><=
/span><span style=3D"font-family:-webkit-system-font,Helvetica Neue,Helveti=
ca,sans-serif">&quot;Michelle Cotton via RT&quot; &lt;<a href=3D"mailto:ian=
a-questions@iana.org" target=3D"_blank">iana-questions@iana.org</a>&gt;<br>=
</span></div><div style=3D"margin-top:0px;margin-right:0px;margin-bottom:0p=
x;margin-left:0px"><span style=3D"font-family:-webkit-system-font,&quot;Hel=
vetica Neue&quot;,Helvetica,sans-serif"><b>Subject: </b></span><span style=
=3D"font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif"><b=
>[IANA #989438] ipv4only.arpa&#39;s delegation should be insecure.</b><br><=
/span></div><div style=3D"margin-top:0px;margin-right:0px;margin-bottom:0px=
;margin-left:0px"><span style=3D"font-family:-webkit-system-font,&quot;Helv=
etica Neue&quot;,Helvetica,sans-serif"><b>Date: </b></span><span style=3D"f=
ont-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif">6 Janua=
ry 2018 at 8:45:10 am AEDT<br></span></div><div style=3D"margin-top:0px;mar=
gin-right:0px;margin-bottom:0px;margin-left:0px"><span style=3D"font-family=
:-webkit-system-font,&quot;Helvetica Neue&quot;,Helvetica,sans-serif"><b>To=
: </b></span><span style=3D"font-family:-webkit-system-font,Helvetica Neue,=
Helvetica,sans-serif"><a href=3D"mailto:marka@isc.org" target=3D"_blank">ma=
rka@isc.org</a><br></span></div><div style=3D"margin-top:0px;margin-right:0=
px;margin-bottom:0px;margin-left:0px"><span style=3D"font-family:-webkit-sy=
stem-font,&quot;Helvetica Neue&quot;,Helvetica,sans-serif"><b>Reply-To: </b=
></span><span style=3D"font-family:-webkit-system-font,Helvetica Neue,Helve=
tica,sans-serif"><a href=3D"mailto:iana-questions@iana.org" target=3D"_blan=
k">iana-questions@iana.org</a><br></span></div><br><div><div>Hello,<br><br>=
Following up on a thread from the end of the year.=C2=A0 Who will bring thi=
s to the DNSOps working group?=C2=A0 Will someone notify us if there is an =
consensus on a conclusion of what needs to be done?<br><br>Thanks in advanc=
e.<br><br>--Michelle Cotton<br><br><br>On Sun Dec 10 22:40:29 2017, <a href=
=3D"mailto:danwing@gmail.com" target=3D"_blank">danwing@gmail.com</a> wrote=
:<br><blockquote type=3D"cite">I had replied to the errata. I agree it warr=
ants additional<br>discussion, and had also suggested same. Dnsops seems ap=
propriate.<br><br><br><br>The question is not to much where the attacker is=
, but what DNSSEC<br>guarantee is provided. DNS64 imagines the client could=
 do its own<br>validation =E2=80=94 if it wanted.=C2=A0 To date, effectivel=
y zero clients seem to<br>want to do their own DNSSEC validation.<br><br>-d=
<br><br><blockquote type=3D"cite">On Dec 10, 2017, at 11:13 AM, Savolainen,=
 Teemu (Nokia-TECH/Tampere)<br>&lt;<a href=3D"mailto:teemu.savolainen@nokia=
.com" target=3D"_blank">teemu.savolainen@nokia.com</a>&gt; wrote:<br><br>Hi=
,<br><br>Dan Wing seem to have moved to VMWare, but cc&#39;ing him now with=
 an<br>email address I found from an I-D..<br><br>I&#39;m not really follow=
ing IETF nowadays, so I don&#39;t know if this has<br>been discussed.<br><b=
r>Also I&#39;m not sure why ISPs couldn=E2=80=99t first verify the A respon=
se&#39;s<br>validity and then generate AAAA response to the client as docum=
ent...<br>but I suppose it could be considered to be more proper action to<=
br>modify insecure responses than secure responses. I&#39;m just worried<br=
>what happens if there&#39;s attacker between ISP and root, in which case<b=
r>the IPv4 address part of the response could be modified by attacker<br>an=
d then delivered to client in the ISP&#39;s synthetic AAAA record..<br><br>=
So I cannot accept the errata straight away, but it should be<br>discussed =
with people who are more experts on this than I am.<br><br>Best regards,<br=
><br>Teemu<br><br><br>-----Original Message-----<br> From: Michelle Cotton =
via RT [mailto:<a href=3D"mailto:iana-questions-" target=3D"_blank">iana-qu=
estions-</a><br><a href=3D"mailto:comment@iana.org" target=3D"_blank">comme=
nt@iana.org</a>]<br>Sent: 9. joulukuuta 2017 1:22<br>Cc: <a href=3D"mailto:=
ietf@kuehlewind.net" target=3D"_blank">ietf@kuehlewind.net</a>; <a href=3D"=
mailto:spencerdawkins.ietf@gmail.com" target=3D"_blank">spencerdawkins.ietf=
@gmail.com</a>;<br><a href=3D"mailto:jouni.nospam@gmail.com" target=3D"_bla=
nk">jouni.nospam@gmail.com</a>; Savolainen, Teemu (Nokia-TECH/Tampere)<br>&=
lt;<a href=3D"mailto:teemu.savolainen@nokia.com" target=3D"_blank">teemu.sa=
volainen@nokia.com</a>&gt;<br>Subject: [IANA #989438] ipv4only.arpa&#39;s d=
elegation should be<br>insecure.<br><br>Hello,<br><br>Just checking to see =
if anyone had a chance to look at this.<br>Dan Wing&#39;s email addressed b=
ounced (<a href=3D"mailto:dwing@cisco.com" target=3D"_blank">dwing@cisco.co=
m</a>).<br><br>Thanks,<br>Michelle<br><br><br><br><blockquote type=3D"cite"=
>On Tue Nov 28 14:43:00 2017, michelle.cotton wrote:<br>Hello Authors and A=
rea Directors,<br><br>We have received a message pointing out an errata rep=
ort that would<br>modify the actions that were performed for RFC7050.<br><b=
r><a href=3D"https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc=
-" target=3D"_blank">https://urldefense.proofpoint.<wbr>com/v2/url?u=3Dhttp=
s-3A__www.<wbr>rfc-</a><br>2Deditor.org_errata_eid5152&amp;d=3D<wbr>DwIGaQ&=
amp;c=3D<wbr>uilaK90D4TOVoH58JNXRgQ&amp;r=3D<wbr>IMDU0f3LtPMQf5XkZ06fNg&amp=
;m=3D<wbr>hjPiqrkJLcvBw1fuqRPXMX6h76vuap<wbr>CYz_DxRRq7SkM&amp;s=3D<wbr>uCK=
CSggUUCCU7iPuRs-<br>usGcL3T69Fia9gTOy4UQwhLk&amp;e=3D<br><br>Has this repor=
t been discussed?=C2=A0 Will the result be an approved<br>errata<br>report =
or a new RFC?<br><br>Thanks in advance.<br><br>Michelle Cotton<br>Protocol =
Parameters Engagement Sr. Manager<br></blockquote><br><br><br></blockquote>=
</blockquote><br><br><br></div></div></blockquote></div><br><div>
--=C2=A0<br>Mark Andrews, ISC<br>1 Seymour St., Dundas Valley, NSW 2117, Au=
stralia<br>PHONE: +61 2 9871 4742 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0INTERNET: <a href=3D"mailto:marka@isc.org" target=3D"_blank">marka@i=
sc.org</a>

</div>
<br></div></div></div></div>______________________________<wbr>____________=
_____<br>v6ops mailing list<br><a href=3D"mailto:v6ops@ietf.org" target=3D"=
_blank">v6ops@ietf.org</a><br><a href=3D"https://www.ietf.org/mailman/listi=
nfo/v6ops" target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/v6o=
ps</a><br></div></blockquote></div><br></div></div><br>____________________=
__________<wbr>_________________<br>
DNSOP mailing list<br>
<a href=3D"mailto:DNSOP@ietf.org">DNSOP@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dnsop" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/dnsop</a><br>
<br></blockquote></div><br></div>

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In-Reply-To: <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es>
From: Lorenzo Colitti <lorenzo@google.com>
Date: Wed, 13 Jun 2018 11:44:51 +0900
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ <jordi.palet=3D
40consulintel.es@dmarc.ietf.org> wrote:

> You don=E2=80=99t need RFC7050 neither DNS64, you can use PCP (RFC7225) t=
o tell
> the CLAT the NAT64 prefix. It also provides additional advantages to the
> operator to control many related aspects (see section 3 of RFC7225).
>
>
>
> 1.       If the operator wants to enable 464xlat: they should hand out a
> DNS64 to the CPE.
>
> 2.       If the operator wants to disable 464xlat: they should NOT hand
> out a DNS64 to the CPE.
>
> This doesn=E2=80=99t work, because the operator may be using RFC7225 inst=
ead of
> RFC7050. You need to try both in that case, and you aren=E2=80=99t provid=
ing a
> =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which is wha=
t RFC8026 does.
>

But it's the same problem again: what's the use case for this DHCPv6
option? An operator that's using RFC7225 has an easy way to tell the CPE
not to do 464xlat: don't hand out the prefix64 to those CPEs. So this is
already possible today.


> 3.       If the operator uses 464xlat, they should not allow the user to
> change the DNS server.
>
>
>
>
>
> Let=E2=80=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the=
 customer to avoid changing the
> DNS =E2=80=A6
>

On an operator-managed CPE, you can. On a user-managed CPE, you can't. But
on such a CPE you probably shouldn't be disabling 464xlat. If the user
wants to use it, it's their CPE, right?

--0000000000003cebd1056e7cf8f0
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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">On Tue, Jun 12=
, 2018 at 7:40 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:=
40consulintel.es@dmarc.ietf.org">40consulintel.es@dmarc.ietf.org</a>&gt; wr=
ote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"ES" link=3D"blue"=
 vlink=3D"purple"><div class=3D"m_-3040664115671453979WordSection1"><p clas=
s=3D"MsoNormal">You don=E2=80=99t need RFC7050 neither DNS64, you can use P=
CP (RFC7225) to tell the CLAT the NAT64 prefix. It also provides additional=
 advantages to the operator to control many related aspects (see section 3 =
of RFC7225).<br></p><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=
=A0<u></u></span></p><p class=3D"MsoNormal" style=3D"margin-left:71.4pt"><u=
></u><span lang=3D"EN-US"><span>1.<span style=3D"font:7.0pt &quot;Times New=
 Roman&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span></span></span><u>=
</u><span lang=3D"EN-US">If the operator wants to enable 464xlat: they shou=
ld hand out a DNS64 to the CPE.<u></u><u></u></span></p><p class=3D"MsoNorm=
al" style=3D"margin-left:71.4pt"><u></u><span lang=3D"EN-US"><span>2.<span =
style=3D"font:7.0pt &quot;Times New Roman&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 </span></span></span><u></u><span lang=3D"EN-US">If the operat=
or wants to disable=C2=A0464xlat: they should NOT hand out a DNS64 to the C=
PE.<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US">Thi=
s doesn=E2=80=99t work, because the operator may be using RFC7225 instead o=
f RFC7050. You need to try both in that case, and you aren=E2=80=99t provid=
ing a =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which is=
 what RFC8026 does.</span></p></div></div></blockquote><div><br></div><div>=
But it&#39;s the same problem again: what&#39;s the use case for this DHCPv=
6 option? An operator that&#39;s using RFC7225 has an easy way to tell the =
CPE not to do 464xlat: don&#39;t hand out the prefix64 to those CPEs. So th=
is is already possible today.</div><div>=C2=A0=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex"><div lang=3D"ES" link=3D"blue" vlink=3D"purple"><div class=3D=
"m_-3040664115671453979WordSection1"><p class=3D"MsoNormal" style=3D"margin=
-left:71.4pt"><u></u><span lang=3D"EN-US"><span>3.<span style=3D"font:7.0pt=
 &quot;Times New Roman&quot;">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span><=
/span></span><u></u><span lang=3D"EN-US">If the operator uses 464xlat, they=
 should not allow the user to change the DNS server.<u></u><u></u></span></=
p><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></=
p><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></=
p><p class=3D"MsoNormal"><span lang=3D"EN-US">Let=E2=80=99s be realistic. Y=
ou can=E2=80=99t =E2=80=9Cforce=E2=80=9D the customer to avoid changing the=
 DNS =E2=80=A6</span></p></div></div></blockquote><div><br></div><div>On an=
 operator-managed CPE, you can. On a user-managed CPE, you can&#39;t. But o=
n such a CPE you probably shouldn&#39;t be disabling 464xlat. If the user w=
ants to use it, it&#39;s their CPE, right?</div></div></div>

--0000000000003cebd1056e7cf8f0--


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From: Mark Andrews <marka@isc.org>
In-Reply-To: <43D81243-B2D8-4622-B03D-D20DB7EC243C@apple.com>
Date: Wed, 13 Jun 2018 13:15:58 +1000
Cc: dnsop <dnsop@ietf.org>, "v6ops@ietf.org WG" <v6ops@ietf.org>, Michelle Cotton via RT <iana-questions@iana.org>, Stuart Cheshire <cheshire@apple.com>
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References: <rt-4.2.9-2607-1515188710-296.989438-6-0@icann.org> <FAA35F1A-9AD4-4993-9A5C-53A6143B9DE7@isc.org> <43D81243-B2D8-4622-B03D-D20DB7EC243C@apple.com>
To: David Schinazi <dschinazi@apple.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/gEWnW_jZmalyj_99XODMjhKRtyU>
Subject: Re: [v6ops] [IANA #989438] ipv4only.arpa's delegation should be insecure.
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> On 13 Jun 2018, at 12:28 pm, David Schinazi <dschinazi@apple.com> =
wrote:
>=20
> Hi everyone,
>=20
> Stuart and I have a draft that attempts to address these issues, =
please let us know if you think it does or doesn't.
>=20
> https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-arpa
>=20
> Thanks,
> David Schinazi
>=20

This does not meet my requirements.  There is zero need for any part of =
the normal DNS resolution
process to know the IPV4ONLY.ARPA is special if IANA stopped signing the =
zone.  That would
allow getaddrinfo() to be able to lookup up the AAAA records without any =
intermediate software
having to special case IPV4ONLY.ARPA.  IPV4ONLY.ARPA would then validate =
as insecure rather
than as secure as it currently does.

The document needs to explicitly state that the delegation for =
IPV4ONLY.ARPA in ARPA MUST
be insecure (no DS record).

You then have other issues to deal with like not sending queries for =
IPV4ONLY.ARPA to servers
which have DNS64 configured or have a local IPV4ONLY.ARPA zone.  These =
are similar to the issues
for HOME.ARPA but are at the ISP rather than the CPE.

One way to handle that would be for CPE to always use the DHCP/RA DNS =
servers for IPV4ONLY.ARPA
and require a explicit override just for IPV4ONLY.ARPA.

Another way would be for middle boxes to intercept queries but then you =
have to account for
anti spoofing technology TSIG, DNS COOKIE etc.  DNS COOKIE just needs =
the delegated servers
for IPV4ONLY.ARPA to not serve any other zones.  That way any DNS COOKIE =
state learnt for the
IP addresses of the servers for IPV4ONLY.ARPA does not impact on =
IPV4ONLY.ARPA lookups.

I mention TSIG because that could be used with a well known TSIG key to =
defeat fragmentation
attacks and because TSIG can be used between clients and recursive =
servers that are not
operated by the ISP.  This would be one case where DNS resolution =
software may want to be
altered by default.  This scenario is even rarer than DNSSEC.

Mark

>> On Jun 12, 2018, at 18:29, Mark Andrews <marka@isc.org> wrote:
>>=20
>> The Domain Name Reservation Considerations in RFC 7050 do not cover =
whether
>> a delegation should be signed or not.  Due to that omission in =
constructing the set
>> of questions to be asked RFC 7050 fails when the client is behind a =
validating resolver
>> that has NO SPECIAL KNOWLEDGE of IPV4ONLY.ARPA.
>>=20
>> There are 2 pieces of work that are required.
>> 1) update the list of questions that need to be asked needs to =
include whether a delegation
>>     needs to be signed or not.
>> 2) update RFC 7050 to include explicit instructions to say DO NOT =
sign IPV4ONLY.ARPA.
>>=20
>> Item 1 is dnsop work as far as I can see.  Item 2, I think, should be =
v6ops work.
>>=20
>> HOME.ARPA is a example of a unsigned delegation.
>> 10.IN-ADDR.ARPA is a example of a unsigned delegation.
>>=20
>> There is zero benefit in IPV4ONLY.ARPA being signed.  Its contents on =
the Internet
>> are well known.  The contents with NAT64 in using are well known =
except for the
>> AAAA query.  The answer to that query is *expected to change*.  That =
answer cannot
>> be validated.
>>=20
>> Mark
>>=20
>>> Begin forwarded message:
>>>=20
>>> From: "Michelle Cotton via RT" <iana-questions@iana.org>
>>> Subject: [IANA #989438] ipv4only.arpa's delegation should be =
insecure.
>>> Date: 6 January 2018 at 8:45:10 am AEDT
>>> To: marka@isc.org
>>> Reply-To: iana-questions@iana.org
>>>=20
>>> Hello,
>>>=20
>>> Following up on a thread from the end of the year.  Who will bring =
this to the DNSOps working group?  Will someone notify us if there is an =
consensus on a conclusion of what needs to be done?
>>>=20
>>> Thanks in advance.
>>>=20
>>> --Michelle Cotton
>>>=20
>>>=20
>>> On Sun Dec 10 22:40:29 2017, danwing@gmail.com wrote:
>>>> I had replied to the errata. I agree it warrants additional
>>>> discussion, and had also suggested same. Dnsops seems appropriate.
>>>>=20
>>>>=20
>>>>=20
>>>> The question is not to much where the attacker is, but what DNSSEC
>>>> guarantee is provided. DNS64 imagines the client could do its own
>>>> validation =E2=80=94 if it wanted.  To date, effectively zero =
clients seem to
>>>> want to do their own DNSSEC validation.
>>>>=20
>>>> -d
>>>>=20
>>>>> On Dec 10, 2017, at 11:13 AM, Savolainen, Teemu =
(Nokia-TECH/Tampere)
>>>>> <teemu.savolainen@nokia.com> wrote:
>>>>>=20
>>>>> Hi,
>>>>>=20
>>>>> Dan Wing seem to have moved to VMWare, but cc'ing him now with an
>>>>> email address I found from an I-D..
>>>>>=20
>>>>> I'm not really following IETF nowadays, so I don't know if this =
has
>>>>> been discussed.
>>>>>=20
>>>>> Also I'm not sure why ISPs couldn=E2=80=99t first verify the A =
response's
>>>>> validity and then generate AAAA response to the client as =
document...
>>>>> but I suppose it could be considered to be more proper action to
>>>>> modify insecure responses than secure responses. I'm just worried
>>>>> what happens if there's attacker between ISP and root, in which =
case
>>>>> the IPv4 address part of the response could be modified by =
attacker
>>>>> and then delivered to client in the ISP's synthetic AAAA record..
>>>>>=20
>>>>> So I cannot accept the errata straight away, but it should be
>>>>> discussed with people who are more experts on this than I am.
>>>>>=20
>>>>> Best regards,
>>>>>=20
>>>>> Teemu
>>>>>=20
>>>>>=20
>>>>> -----Original Message-----
>>>>> From: Michelle Cotton via RT [mailto:iana-questions-
>>>>> comment@iana.org]
>>>>> Sent: 9. joulukuuta 2017 1:22
>>>>> Cc: ietf@kuehlewind.net; spencerdawkins.ietf@gmail.com;
>>>>> jouni.nospam@gmail.com; Savolainen, Teemu (Nokia-TECH/Tampere)
>>>>> <teemu.savolainen@nokia.com>
>>>>> Subject: [IANA #989438] ipv4only.arpa's delegation should be
>>>>> insecure.
>>>>>=20
>>>>> Hello,
>>>>>=20
>>>>> Just checking to see if anyone had a chance to look at this.
>>>>> Dan Wing's email addressed bounced (dwing@cisco.com).
>>>>>=20
>>>>> Thanks,
>>>>> Michelle
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>> On Tue Nov 28 14:43:00 2017, michelle.cotton wrote:
>>>>>> Hello Authors and Area Directors,
>>>>>>=20
>>>>>> We have received a message pointing out an errata report that =
would
>>>>>> modify the actions that were performed for RFC7050.
>>>>>>=20
>>>>>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc-
>>>>>> =
2Deditor.org_errata_eid5152&d=3DDwIGaQ&c=3DuilaK90D4TOVoH58JNXRgQ&r=3DIMDU=
0f3LtPMQf5XkZ06fNg&m=3DhjPiqrkJLcvBw1fuqRPXMX6h76vuapCYz_DxRRq7SkM&s=3DuCK=
CSggUUCCU7iPuRs-
>>>>>> usGcL3T69Fia9gTOy4UQwhLk&e=3D
>>>>>>=20
>>>>>> Has this report been discussed?  Will the result be an approved
>>>>>> errata
>>>>>> report or a new RFC?
>>>>>>=20
>>>>>> Thanks in advance.
>>>>>>=20
>>>>>> Michelle Cotton
>>>>>> Protocol Parameters Engagement Sr. Manager
>>>>>=20
>>>>>=20
>>>>>=20
>>>=20
>>>=20
>>>=20
>>=20
>> --=20
>> Mark Andrews, ISC
>> 1 Seymour St., Dundas Valley, NSW 2117, Australia
>> PHONE: +61 2 9871 4742              INTERNET: marka@isc.org
>>=20
>> _______________________________________________
>> v6ops mailing list
>> v6ops@ietf.org
>> https://www.ietf.org/mailman/listinfo/v6ops
>=20

--=20
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka@isc.org


From nobody Tue Jun 12 22:04:31 2018
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Date: Wed, 13 Jun 2018 07:04:21 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: "Mudric, Dusan (Dusan)" <dmudric@avaya.com>
cc: Richard Patterson <richard@helix.net.nz>,  "v6ops@ietf.org list" <v6ops@ietf.org>
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Subject: Re: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-01.txt
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On Tue, 12 Jun 2018, Mudric, Dusan (Dusan) wrote:

> lease. Considering the lease will not be RELEASE-d, the server will not 
> offer the lease for the new solicitation. The client should use Server

Hm, I am not an DHCPv6 expert, but in my experience if I power off a 
device with an active lease, power it on again, it comes up again and does 
SOLICIT, it will get the same prefix back that it had before the power 
off (it does not provide any prefix information in the solicit).

What am I missing here?

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se


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Date: Wed, 13 Jun 2018 08:42:02 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Alejandro D'Egidio <adegidio@telecentro.net.ar>, <v6ops@ietf.org>
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Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Hi Alejandro,

Thanks for the inputs/questions.

Some responses below, in-line.

Regards,
Jordi
=20
=20

=EF=BB=BF-----Mensaje original-----
De: v6ops <v6ops-bounces@ietf.org> en nombre de Alejandro D'Egidio <adegidi=
o@telecentro.net.ar>
Fecha: martes, 12 de junio de 2018, 22:55
Para: <v6ops@ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

    Hello,
    First at all, I've read all the thread and I think this is a very usefu=
l discussion.
    I work in a cable operator and I think 464XLAT is a great idea to be in=
cluded in CPEs. So, everything related to that is interesting for me.

-> You're not alone, many people is considering 464XLAT, so welcome to the =
club.

    I have some questions:
    1- Why the RFC8026 can include Option Codes for many transition methods=
 and not for 464XLAT?

-> I've looked at many option codes for DHCPv6 options, and I've seen that =
is done without any problem when needed in other IETF documents, so I clear=
ly believe we should do that, so we can have a priority and on/off switch f=
or every protocol. As Barbara said operators should be able to choose if th=
ey want the CE to use a mechanism or not.

    2- Why we can't have an alternative to RFC7050 and RFC7225?

-> We proposed some time ago a mechanism based in a new DHCPv6 option but w=
as not accepted. The reason most of the time this doesn't happen is that op=
erators aren't contributing to IETF to tell "yes I need this (or I don't ne=
ed that)". Is not an issue for the scope of this document, but I agree, it =
will be good to have it. That document is expired, but still available if y=
ou want to take a look (https://tools.ietf.org/html/draft-li-intarea-nat64-=
prefix-dhcp-option-01). Note that in any case, this is not being discussed =
now (and is not a topic for this WG).

    3- What if some CPEs works fine with some RFCs and not with other? Shou=
ldn't be better to have alternatives? It's really common to have many Bugs =
in CPEs specially with new protocols. They can say they support some RFC bu=
t it doesn't work and you will need to wait some months (if you're lucky) t=
o get the solution.

-> Not sure to understand your point here. However, what we are trying, pre=
cisely, is to make sure that the CPEs intended for the transition (supporti=
ng IPv4 while we need it, on top of IPv6-only networks), follow a single do=
cument, the same way we have RFC7084 when no transition at all is needed.

    4- In our cablemodems we doesn't allow to customer to modify DNS config=
uration but, what about if customer change cablemodem to Bridge Mode and co=
nnects it's own CPE? This is a usual case where you can't control DNS confi=
guration but you still want to use 464XLAT.

-> Right, this is one more reason to have the support of 464XLAT without DN=
S64, and thus an RFC8026 option to prioritize and switch on/off the mechani=
sm.
   =20
   =20
    Thanks and Regards,
   =20
    ALEJANDRO D'EGIDIO=20
    Jefe de Ingenier=C3=ADa de Backbone=20
    F: +54 11 3977 1025  | M: +54 911 5794 1589=20
    Lavard=C3=A9n 157. Piso 3. CABA (C1437FBC)
   =20
    ----- Mensaje original -----
    De: "JORDI PALET MARTINEZ" <jordi.palet=3D40consulintel.es@dmarc.ietf.o=
rg>
    Para: "Philip Homburg" <pch-v6ops-8@u-1.phicoh.com>, v6ops@ietf.org
    Enviados: Martes, 12 de Junio 2018 7:48:07
    Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v=
6ops-transition-ipv4aas
   =20
    I think my earlier email to Lorenzo provides answers to most of this ..=
. but
   =20
        > I see your point, but
        > what an operator need is a "100% sure" way to make sure that they
        > can tell the CPE to not use a specific transition mechanism (whic=
h
        > for the other mechanisms we have with RFC8026).
        >=20
        > So, assuming that DNS64 is only there if combined with NAT64 is
        > not "safe 100%" because if using CLAT, you can avoid having a DNS=
64
        > (this is the one that breaks DNSSEC, in case I wrote it incorrect=
ly
        > before).
       =20
        I'm saying that if an operator uses DNS64 to signal the presence of=
 NAT64,
        then that is a reliable signal that doesn't need an additional DHCP=
 option.
       =20
        So if is safe for a CPE to just do RFC7050, because if DNS64 is det=
ected,
        you can be sure that the operator wants the CPE to use NAT64.
   =20
    As said, you can use the CLAT w/o DNS64, so it is not a safe way to det=
ect the CPE should use or not the NAT64.
       =20
        > But if the user changed the DNS in the CPE (which is quite common=
),
        > there will not be DNS64 and still may be the ISP want to have the
        > CLAT running, because is using that for the IPv4 service for that
        > particular customer.
       =20
        Yeah, what if the user changes settings? Maybe the CPE has a way to=
 force=20
        NAT64 on. What do you do then? All bets are off when users start ch=
anging
        settings.
   =20
    An operator wants to make it as proof as possible to user changes. A us=
er has no interest in changing the status of NAT64 (probably they don't kno=
w what it means), but they have interested in changing the DNS, because man=
y apps or web sites tell them to change it.
       =20
        In the context of RFC7050, the CPE can opt to use the original reso=
lvers
        provided by upstream to figure out the translation prefix.
       =20
        Note that if the CPE uses resolvers configured by the user for RFC7=
050, then
        is it quite possible that the translation prefix is not discovered =
(for example
        if the user configures a well known public resolver). Or worse,=20
        the user may configure a DNS64 resolver that uses a different prefi=
x.
   =20
    Right, that's one case, using an alternative DNS64, which will bring al=
ternative NAT64, unless/or the operator is using PCP for the NAT64 provisio=
ning.
       =20
        > If you agree that the CPE may request a PCP option, etc., then
        > request the S46, I think you are in agreement that we need the S4=
6
        > priority option codes for all the mechanism that we are asking to
        > be supported by the CPE, right?
       =20
        To the extent that RFC8026 is incomplete, that should be fixed. How=
ever as
        Section 2.2 describes, what S46 offers can be done already be done =
by the
        DHCPv6 server. So S46 just provides a relative priority of differen=
t
        mechanisms, not an on/off switch for NAT64.
       =20
    What it makes this work is the combination of RFC8026 and the CPE behav=
ior. The idea is to have a S46 option to provide a priority in a list of "p=
ossible" transition mechanism to a given CPE. If the operator doesn't want =
that a specific CPE uses NAT64, then the S46 will not contain that option, =
so the CE will not use it, because will not have a match (even if the CPE i=
s able to use 464XLAT). Not sure if this explanation clarify it ? I'm worki=
ng on the precise text for that in the ID ...
   =20
       =20
   =20
   =20
   =20
    **********************************************
    IPv4 is over
    Are you ready for the new Internet ?
    http://www.consulintel.es
    The IPv6 Company
   =20
    This electronic message contains information which may be privileged or=
 confidential. The information is intended to be for the exclusive use of t=
he individual(s) named above and further non-explicilty authorized disclosu=
re, copying, distribution or use of the contents of this information, even =
if partially, including attached files, is strictly prohibited and will be =
considered a criminal offense. If you are not the intended recipient be awa=
re that any disclosure, copying, distribution or use of the contents of thi=
s information, even if partially, including attached files, is strictly pro=
hibited, will be considered a criminal offense, so you must reply to the or=
iginal sender to inform about this communication and delete it.
   =20
   =20
   =20
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20
    _______________________________________________
    v6ops mailing list
    v6ops@ietf.org
    https://www.ietf.org/mailman/listinfo/v6ops
   =20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
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Date: Wed, 13 Jun 2018 08:50:21 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Message-ID: <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es>
Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com>
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Lorenzo, you=E2=80=99re missing the key aspect: Being able to prioritize, w=
hen an ISP supports several transition mechanisms.

=20

RFC8026 key aspect is priority. If we don=E2=80=99t add an option code for =
464XLAT, then it can=E2=80=99t be managed the same way.


Regards,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lorenzo Colitti <lorenzo=3D=
40google.com@dmarc.ietf.org>
Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 4:45
Para: <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

=20

On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ <jordi.palet=3D40consu=
lintel.es@dmarc.ietf.org> wrote:

You don=E2=80=99t need RFC7050 neither DNS64, you can use PCP (RFC7225) to =
tell the CLAT the NAT64 prefix. It also provides additional advantages to t=
he operator to control many related aspects (see section 3 of RFC7225).

=20

1.       If the operator wants to enable 464xlat: they should hand out a DN=
S64 to the CPE.

2.       If the operator wants to disable 464xlat: they should NOT hand out=
 a DNS64 to the CPE.

This doesn=E2=80=99t work, because the operator may be using RFC7225 instea=
d of RFC7050. You need to try both in that case, and you aren=E2=80=99t pro=
viding a =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which=
 is what RFC8026 does.

=20

But it's the same problem again: what's the use case for this DHCPv6 option=
? An operator that's using RFC7225 has an easy way to tell the CPE not to d=
o 464xlat: don't hand out the prefix64 to those CPEs. So this is already po=
ssible today.

 =20

3.       If the operator uses 464xlat, they should not allow the user to ch=
ange the DNS server.

=20

=20

Let=E2=80=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the c=
ustomer to avoid changing the DNS =E2=80=A6

=20

On an operator-managed CPE, you can. On a user-managed CPE, you can't. But =
on such a CPE you probably shouldn't be disabling 464xlat. If the user want=
s to use it, it's their CPE, right?

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20



**********************************************
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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-la=
nguage:EN-US'>Lorenzo, you=E2=80=99re missing the key aspect: Being able to=
 prioritize, when an ISP supports several transition mechanisms.<o:p></o:p>=
</span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-lan=
guage:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3D=
EN-US style=3D'mso-fareast-language:EN-US'>RFC8026 key aspect is priority. =
If we don=E2=80=99t add an option code for 464XLAT, then it can=E2=80=99t b=
e managed the same way.<o:p></o:p></span></p><div><p class=3DMsoNormal><spa=
n lang=3DEN-US style=3D'font-size:10.5pt;color:black'><br></span><span lang=
=3DES-TRAD style=3D'font-size:10.5pt;color:black'>Regards,<o:p></o:p></span=
></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TR=
AD style=3D'font-size:10.5pt;color:black;mso-fareast-language:EN-US'>Jordi<=
o:p></o:p></span></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><s=
pan lang=3DES-TRAD style=3D'font-size:10.5pt;color:black;mso-fareast-langua=
ge:EN-US'><o:p>&nbsp;</o:p></span></p></div><p class=3DMsoNormal><span lang=
=3DES-TRAD style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p=
><p class=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-fareast-language:EN=
-US'><o:p>&nbsp;</o:p></span></p><div style=3D'border:none;border-top:solid=
 #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal style=3D'mar=
gin-left:35.4pt'><b><span style=3D'font-size:12.0pt;color:black'>De: </span=
></b><span style=3D'font-size:12.0pt;color:black'>v6ops &lt;v6ops-bounces@i=
etf.org&gt; en nombre de Lorenzo Colitti &lt;lorenzo=3D40google.com@dmarc.i=
etf.org&gt;<br><b>Fecha: </b>mi=C3=A9rcoles, 13 de junio de 2018, 4:45<br><=
b>Para: </b>&lt;jordi.palet=3D40consulintel.es@dmarc.ietf.org&gt;<br><b>CC:=
 </b>&quot;v6ops@ietf.org WG&quot; &lt;v6ops@ietf.org&gt;<br><b>Asunto: </b=
>Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transi=
tion-ipv4aas<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'=
margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div><div><div><div><p class=3DMs=
oNormal style=3D'margin-left:35.4pt'>On Tue, Jun 12, 2018 at 7:40 PM JORDI =
PALET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:40consulintel.es@dmarc.i=
etf.org">40consulintel.es@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></p></div=
><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0=
cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p class=3DM=
soNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin=
-left:35.4pt'>You don=E2=80=99t need RFC7050 neither DNS64, you can use PCP=
 (RFC7225) to tell the CLAT the NAT64 prefix. It also provides additional a=
dvantages to the operator to control many related aspects (see section 3 of=
 RFC7225).<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:a=
uto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>&nbsp=
;</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:aut=
o;mso-margin-bottom-alt:auto;margin-left:106.8pt'><span lang=3DEN-US>1.</sp=
an><span lang=3DEN-US style=3D'font-size:7.0pt;font-family:"Times New Roman=
",serif'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span lang=3DEN-US>If =
the operator wants to enable 464xlat: they should hand out a DNS64 to the C=
PE.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:a=
uto;mso-margin-bottom-alt:auto;margin-left:106.8pt'><span lang=3DEN-US>2.</=
span><span lang=3DEN-US style=3D'font-size:7.0pt;font-family:"Times New Rom=
an",serif'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span lang=3DEN-US>I=
f the operator wants to disable&nbsp;464xlat: they should NOT hand out a DN=
S64 to the CPE.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-marg=
in-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=
=3DEN-US>This doesn=E2=80=99t work, because the operator may be using RFC72=
25 instead of RFC7050. You need to try both in that case, and you aren=E2=
=80=99t providing a =E2=80=9Cpriority=E2=80=9D to a possible list of mechan=
isms, which is what RFC8026 does.</span><o:p></o:p></p></div></div></blockq=
uote><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:=
p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>But it's the sam=
e problem again: what's the use case for this DHCPv6 option? An operator th=
at's using RFC7225 has an easy way to tell the CPE not to do 464xlat: don't=
 hand out the prefix64 to those CPEs. So this is already possible today.<o:=
p></o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>&n=
bsp;&nbsp;<o:p></o:p></p></div><blockquote style=3D'border:none;border-left=
:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-rig=
ht:0cm'><div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso=
-margin-bottom-alt:auto;margin-left:106.8pt'><span lang=3DEN-US>3.</span><s=
pan lang=3DEN-US style=3D'font-size:7.0pt;font-family:"Times New Roman",ser=
if'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span lang=3DEN-US>If the o=
perator uses 464xlat, they should not allow the user to change the DNS serv=
er.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:a=
uto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>&nbsp=
;</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:aut=
o;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>&nbsp;<=
/span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;=
mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>Let=E2=80=
=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the customer t=
o avoid changing the DNS =E2=80=A6</span><o:p></o:p></p></div></div></block=
quote><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o=
:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>On an o=
perator-managed CPE, you can. On a user-managed CPE, you can't. But on such=
 a CPE you probably shouldn't be disabling 464xlat. If the user wants to us=
e it, it's their CPE, right?<o:p></o:p></p></div></div></div><p class=3DMso=
Normal style=3D'margin-left:35.4pt'>_______________________________________=
________ v6ops mailing list v6ops@ietf.org https://www.ietf.org/mailman/lis=
tinfo/v6ops <o:p></o:p></p></div><br>**************************************=
********<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
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copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
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In-Reply-To: <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es>
From: Lorenzo Colitti <lorenzo@google.com>
Date: Wed, 13 Jun 2018 16:38:25 +0900
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To: jordi.palet=40consulintel.es@dmarc.ietf.org
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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That goes back to my earlier point of that from a technical perspective
464xlat is pretty much the worst of the transition mechanisms. I don't
think we should be recommending running it on wireline at all, let alone
prioritizing it over something else .:-)

On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET MARTINEZ <jordi.palet=3D
40consulintel.es@dmarc.ietf.org> wrote:

> Lorenzo, you=E2=80=99re missing the key aspect: Being able to prioritize,=
 when an
> ISP supports several transition mechanisms.
>
>
>
> RFC8026 key aspect is priority. If we don=E2=80=99t add an option code fo=
r
> 464XLAT, then it can=E2=80=99t be managed the same way.
>
>
> Regards,
>
> Jordi
>
>
>
>
>
>
>
> *De: *v6ops <v6ops-bounces@ietf.org> en nombre de Lorenzo Colitti
> <lorenzo=3D40google.com@dmarc.ietf.org>
> *Fecha: *mi=C3=A9rcoles, 13 de junio de 2018, 4:45
> *Para: *<jordi.palet=3D40consulintel.es@dmarc.ietf.org>
> *CC: *"v6ops@ietf.org WG" <v6ops@ietf.org>
> *Asunto: *Re: [v6ops] updating RFC8026 to support 464XLAT in
> draft-ietf-v6ops-transition-ipv4aas
>
>
>
> On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ <jordi.palet=3D
> 40consulintel.es@dmarc.ietf.org> wrote:
>
> You don=E2=80=99t need RFC7050 neither DNS64, you can use PCP (RFC7225) t=
o tell
> the CLAT the NAT64 prefix. It also provides additional advantages to the
> operator to control many related aspects (see section 3 of RFC7225).
>
>
>
> 1.       If the operator wants to enable 464xlat: they should hand out a
> DNS64 to the CPE.
>
> 2.       If the operator wants to disable 464xlat: they should NOT hand
> out a DNS64 to the CPE.
>
> This doesn=E2=80=99t work, because the operator may be using RFC7225 inst=
ead of
> RFC7050. You need to try both in that case, and you aren=E2=80=99t provid=
ing a
> =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which is wha=
t RFC8026 does.
>
>
>
> But it's the same problem again: what's the use case for this DHCPv6
> option? An operator that's using RFC7225 has an easy way to tell the CPE
> not to do 464xlat: don't hand out the prefix64 to those CPEs. So this is
> already possible today.
>
>
>
> 3.       If the operator uses 464xlat, they should not allow the user to
> change the DNS server.
>
>
>
>
>
> Let=E2=80=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the=
 customer to avoid changing the
> DNS =E2=80=A6
>
>
>
> On an operator-managed CPE, you can. On a user-managed CPE, you can't. Bu=
t
> on such a CPE you probably shouldn't be disabling 464xlat. If the user
> wants to use it, it's their CPE, right?
>
> _______________________________________________ v6ops mailing list
> v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>
> This electronic message contains information which may be privileged or
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> the individual(s) named above and further non-explicilty authorized
> disclosure, copying, distribution or use of the contents of this
> information, even if partially, including attached files, is strictly
> prohibited and will be considered a criminal offense. If you are not the
> intended recipient be aware that any disclosure, copying, distribution or
> use of the contents of this information, even if partially, including
> attached files, is strictly prohibited, will be considered a criminal
> offense, so you must reply to the original sender to inform about this
> communication and delete it.
>
>

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<div dir=3D"ltr">That goes back to my earlier point of that from a technica=
l perspective 464xlat is pretty much the worst of the transition mechanisms=
. I don&#39;t think we should be recommending running it on wireline at all=
, let alone prioritizing it over something else .:-)</div><br><div class=3D=
"gmail_quote"><div dir=3D"ltr">On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET =
MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:40consulintel.es@dmarc.ietf.or=
g">40consulintel.es@dmarc.ietf.org</a>&gt; wrote:<br></div><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pad=
ding-left:1ex"><div lang=3D"ES" link=3D"blue" vlink=3D"purple"><div class=
=3D"m_-2528391801406928691WordSection1"><p class=3D"MsoNormal"><span lang=
=3D"EN-US">Lorenzo, you=E2=80=99re missing the key aspect: Being able to pr=
ioritize, when an ISP supports several transition mechanisms.<u></u><u></u>=
</span></p><p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u>=
</span></p><p class=3D"MsoNormal"><span lang=3D"EN-US">RFC8026 key aspect i=
s priority. If we don=E2=80=99t add an option code for 464XLAT, then it can=
=E2=80=99t be managed the same way.<u></u><u></u></span></p><div><p class=
=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:black">=
<br></span><span lang=3D"ES-TRAD" style=3D"font-size:10.5pt;color:black">Re=
gards,<u></u><u></u></span></p><p class=3D"MsoNormal" style=3D"margin-botto=
m:12.0pt"><span lang=3D"ES-TRAD" style=3D"font-size:10.5pt;color:black">Jor=
di<u></u><u></u></span></p><p class=3D"MsoNormal" style=3D"margin-bottom:12=
.0pt"><span lang=3D"ES-TRAD" style=3D"font-size:10.5pt;color:black"><u></u>=
=C2=A0<u></u></span></p></div><p class=3D"MsoNormal"><span lang=3D"ES-TRAD"=
><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span lang=3D"ES-TRA=
D"><u></u>=C2=A0<u></u></span></p><div style=3D"border:none;border-top:soli=
d #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class=3D"MsoNormal" style=3D"=
margin-left:35.4pt"><b><span style=3D"font-size:12.0pt;color:black">De: </s=
pan></b><span style=3D"font-size:12.0pt;color:black">v6ops &lt;<a href=3D"m=
ailto:v6ops-bounces@ietf.org" target=3D"_blank">v6ops-bounces@ietf.org</a>&=
gt; en nombre de Lorenzo Colitti &lt;lorenzo=3D<a href=3D"mailto:40google.c=
om@dmarc.ietf.org" target=3D"_blank">40google.com@dmarc.ietf.org</a>&gt;<br=
><b>Fecha: </b>mi=C3=A9rcoles, 13 de junio de 2018, 4:45<br><b>Para: </b>&l=
t;jordi.palet=3D<a href=3D"mailto:40consulintel.es@dmarc.ietf.org" target=
=3D"_blank">40consulintel.es@dmarc.ietf.org</a>&gt;<br><b>CC: </b>&quot;<a =
href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6ops@ietf.org</a> WG&quot=
; &lt;<a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6ops@ietf.org</a=
>&gt;<br><b>Asunto: </b>Re: [v6ops] updating RFC8026 to support 464XLAT in =
draft-ietf-v6ops-transition-ipv4aas<u></u><u></u></span></p></div><div><p c=
lass=3D"MsoNormal" style=3D"margin-left:35.4pt"><u></u>=C2=A0<u></u></p></d=
iv><div><div><div><p class=3D"MsoNormal" style=3D"margin-left:35.4pt">On Tu=
e, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D<a href=
=3D"mailto:40consulintel.es@dmarc.ietf.org" target=3D"_blank">40consulintel=
.es@dmarc.ietf.org</a>&gt; wrote:<u></u><u></u></p></div><blockquote style=
=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0cm 0cm 0cm 6.0pt;m=
argin-left:4.8pt;margin-right:0cm"><div><div><p class=3D"MsoNormal" style=
=3D"margin-left:35.4pt">You don=E2=80=99t need RFC7050 neither DNS64, you c=
an use PCP (RFC7225) to tell the CLAT the NAT64 prefix. It also provides ad=
ditional advantages to the operator to control many related aspects (see se=
ction 3 of RFC7225).<u></u><u></u></p><p class=3D"MsoNormal" style=3D"margi=
n-left:35.4pt"><span lang=3D"EN-US">=C2=A0</span><u></u><u></u></p><p class=
=3D"MsoNormal" style=3D"margin-left:106.8pt"><span lang=3D"EN-US">1.</span>=
<span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&quot;Times New R=
oman&quot;,serif">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span><span lang=3D=
"EN-US">If the operator wants to enable 464xlat: they should hand out a DNS=
64 to the CPE.</span><u></u><u></u></p><p class=3D"MsoNormal" style=3D"marg=
in-left:106.8pt"><span lang=3D"EN-US">2.</span><span lang=3D"EN-US" style=
=3D"font-size:7.0pt;font-family:&quot;Times New Roman&quot;,serif">=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span><span lang=3D"EN-US">If the operator =
wants to disable=C2=A0464xlat: they should NOT hand out a DNS64 to the CPE.=
</span><u></u><u></u></p><p class=3D"MsoNormal" style=3D"margin-left:35.4pt=
"><span lang=3D"EN-US">This doesn=E2=80=99t work, because the operator may =
be using RFC7225 instead of RFC7050. You need to try both in that case, and=
 you aren=E2=80=99t providing a =E2=80=9Cpriority=E2=80=9D to a possible li=
st of mechanisms, which is what RFC8026 does.</span><u></u><u></u></p></div=
></div></blockquote><div><p class=3D"MsoNormal" style=3D"margin-left:35.4pt=
"><u></u>=C2=A0<u></u></p></div><div><p class=3D"MsoNormal" style=3D"margin=
-left:35.4pt">But it&#39;s the same problem again: what&#39;s the use case =
for this DHCPv6 option? An operator that&#39;s using RFC7225 has an easy wa=
y to tell the CPE not to do 464xlat: don&#39;t hand out the prefix64 to tho=
se CPEs. So this is already possible today.<u></u><u></u></p></div><div><p =
class=3D"MsoNormal" style=3D"margin-left:35.4pt">=C2=A0=C2=A0<u></u><u></u>=
</p></div><blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;=
padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm"><div><div><p =
class=3D"MsoNormal" style=3D"margin-left:106.8pt"><span lang=3D"EN-US">3.</=
span><span lang=3D"EN-US" style=3D"font-size:7.0pt;font-family:&quot;Times =
New Roman&quot;,serif">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 </span><span la=
ng=3D"EN-US">If the operator uses 464xlat, they should not allow the user t=
o change the DNS server.</span><u></u><u></u></p><p class=3D"MsoNormal" sty=
le=3D"margin-left:35.4pt"><span lang=3D"EN-US">=C2=A0</span><u></u><u></u><=
/p><p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D"EN-US"=
>=C2=A0</span><u></u><u></u></p><p class=3D"MsoNormal" style=3D"margin-left=
:35.4pt"><span lang=3D"EN-US">Let=E2=80=99s be realistic. You can=E2=80=99t=
 =E2=80=9Cforce=E2=80=9D the customer to avoid changing the DNS =E2=80=A6</=
span><u></u><u></u></p></div></div></blockquote><div><p class=3D"MsoNormal"=
 style=3D"margin-left:35.4pt"><u></u>=C2=A0<u></u></p></div><div><p class=
=3D"MsoNormal" style=3D"margin-left:35.4pt">On an operator-managed CPE, you=
 can. On a user-managed CPE, you can&#39;t. But on such a CPE you probably =
shouldn&#39;t be disabling 464xlat. If the user wants to use it, it&#39;s t=
heir CPE, right?<u></u><u></u></p></div></div></div><p class=3D"MsoNormal" =
style=3D"margin-left:35.4pt">______________________________________________=
_ v6ops mailing list <a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6=
ops@ietf.org</a> <a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/v6ops</a> <u></u><u><=
/u></p></div><br>**********************************************<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
<a href=3D"http://www.consulintel.es" target=3D"_blank">http://www.consulin=
tel.es</a><br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
<br>
</div>
</blockquote></div>

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Date: Wed, 13 Jun 2018 09:52:48 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Message-ID: <8F8C6328-7A18-4399-A0DE-19EDB280E238@consulintel.es>
Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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I don=E2=80=99t think is fair to judge if 464XLAT is better or worse than o=
ther transition mechanism because it was not included in RFC8026 =E2=80=A6

=20

By the way, I realized also that some CLAT implementations are taking by de=
fault the NAT64 WKP (64:ff9b::/96, and other prefixes can be manually confi=
gured by GUI or CLI), so in fact, one more example that DNS64 is not needed=
 and you may not need to implement at all RFC7050 neither RFC7225, so one m=
ore reason for requiring this change.

=20

Note that I=E2=80=99m not saying is good a CLAT with by default the WKP NAT=
64, because it means the operator is forced to use the WKP, however, I =E2=
=80=98ve the feeling that in 99% of the NAT64 deployments is done that way =
...


Regards,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lorenzo Colitti <lorenzo=3D=
40google.com@dmarc.ietf.org>
Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 9:39
Para: <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

=20

That goes back to my earlier point of that from a technical perspective 464=
xlat is pretty much the worst of the transition mechanisms.. I don't think =
we should be recommending running it on wireline at all, let alone prioriti=
zing it over something else .:-)

=20

On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET MARTINEZ <jordi.palet=3D40consu=
lintel.es@dmarc.ietf.org> wrote:

Lorenzo, you=E2=80=99re missing the key aspect: Being able to prioritize, w=
hen an ISP supports several transition mechanisms.

=20

RFC8026 key aspect is priority. If we don=E2=80=99t add an option code for =
464XLAT, then it can=E2=80=99t be managed the same way.


Regards,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lorenzo Colitti <lorenzo=3D=
40google.com@dmarc.ietf.org>
Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 4:45
Para: <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

=20

On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ <jordi.palet=3D40consu=
lintel..es@dmarc.ietf.org> wrote:

You don=E2=80=99t need RFC7050 neither DNS64, you can use PCP (RFC7225) to =
tell the CLAT the NAT64 prefix. It also provides additional advantages to t=
he operator to control many related aspects (see section 3 of RFC7225).

=20

1.       If the operator wants to enable 464xlat: they should hand out a DN=
S64 to the CPE.

2.       If the operator wants to disable 464xlat: they should NOT hand out=
 a DNS64 to the CPE.

This doesn=E2=80=99t work, because the operator may be using RFC7225 instea=
d of RFC7050. You need to try both in that case, and you aren=E2=80=99t pro=
viding a =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which=
 is what RFC8026 does.

=20

But it's the same problem again: what's the use case for this DHCPv6 option=
? An operator that's using RFC7225 has an easy way to tell the CPE not to d=
o 464xlat: don't hand out the prefix64 to those CPEs. So this is already po=
ssible today.

 =20

3.       If the operator uses 464xlat, they should not allow the user to ch=
ange the DNS server.

=20

=20

Let=E2=80=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the c=
ustomer to avoid changing the DNS =E2=80=A6

=20

On an operator-managed CPE, you can. On a user-managed CPE, you can't. But =
on such a CPE you probably shouldn't be disabling 464xlat. If the user want=
s to use it, it's their CPE, right?

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20


**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.


--B_3611728368_1231216232
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	charset="UTF-8"
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<html xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sc=
hemas-microsoft-com:office:word" xmlns:m=3D"http://schemas.microsoft.com/of=
fice/2004/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta ht=
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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-la=
nguage:EN-US'>I don=E2=80=99t think is fair to judge if 464XLAT is better o=
r worse than other transition mechanism because it was not included in RFC8=
026 =E2=80=A6<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=
=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>By the=
 way, I realized also that some CLAT implementations are taking by default =
the NAT64 WKP (64:ff9b::/96, and other prefixes can be manually configured =
by GUI or CLI), so in fact, one more example that DNS64 is not needed and y=
ou may not need to implement at all RFC7050 neither RFC7225, so one more re=
ason for requiring this change.<o:p></o:p></span></p><p class=3DMsoNormal><=
span lang=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></s=
pan></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-langua=
ge:EN-US'>Note that I=E2=80=99m not saying is good a CLAT with by default t=
he WKP NAT64, because it means the operator is forced to use the WKP, howev=
er, I =E2=80=98ve the feeling that in 99% of the NAT64 deployments is done =
that way ...<o:p></o:p></span></p><div><p class=3DMsoNormal><span lang=3DEN=
-US style=3D'font-size:10.5pt;color:black'><br></span><span lang=3DES-TRAD =
style=3D'font-size:10.5pt;color:black'>Regards,<o:p></o:p></span></p><p cla=
ss=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD style=3D=
'font-size:10.5pt;color:black;mso-fareast-language:EN-US'>Jordi<o:p></o:p><=
/span></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3D=
ES-TRAD style=3D'font-size:10.5pt;color:black;mso-fareast-language:EN-US'><=
o:p>&nbsp;</o:p></span></p></div><p class=3DMsoNormal><span lang=3DES-TRAD =
style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=
=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-fareast-language:EN-US'><o:p=
>&nbsp;</o:p></span></p><div style=3D'border:none;border-top:solid #B5C4DF =
1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal style=3D'margin-left:=
35.4pt'><b><span style=3D'font-size:12.0pt;color:black'>De: </span></b><spa=
n style=3D'font-size:12.0pt;color:black'>v6ops &lt;v6ops-bounces@ietf.org&g=
t; en nombre de Lorenzo Colitti &lt;lorenzo=3D40google.com@dmarc.ietf.org&g=
t;<br><b>Fecha: </b>mi=C3=A9rcoles, 13 de junio de 2018, 9:39<br><b>Para: <=
/b>&lt;jordi.palet=3D40consulintel.es@dmarc.ietf.org&gt;<br><b>CC: </b>&quo=
t;v6ops@ietf.org WG&quot; &lt;v6ops@ietf.org&gt;<br><b>Asunto: </b>Re: [v6o=
ps] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4=
aas<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-le=
ft:35.4pt'><o:p>&nbsp;</o:p></p></div><div><p class=3DMsoNormal style=3D'ma=
rgin-left:35.4pt'>That goes back to my earlier point of that from a technic=
al perspective 464xlat is pretty much the worst of the transition mechanism=
s.. I don't think we should be recommending running it on wireline at all, =
let alone prioritizing it over something else .:-)<o:p></o:p></p></div><p c=
lass=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p><div><di=
v><p class=3DMsoNormal style=3D'margin-left:35.4pt'>On Wed, Jun 13, 2018 at=
 3:50 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:40consuli=
ntel.es@dmarc.ietf.org">40consulintel.es@dmarc.ietf.org</a>&gt; wrote:<o:p>=
</o:p></p></div><blockquote style=3D'border:none;border-left:solid #CCCCCC =
1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><d=
iv><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto;margin-left:35.4pt'><span lang=3DEN-US>Lorenzo, you=E2=80=99re mis=
sing the key aspect: Being able to prioritize, when an ISP supports several=
 transition mechanisms.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'=
mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><spa=
n lang=3DEN-US>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal style=3D'ms=
o-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span =
lang=3DEN-US>RFC8026 key aspect is priority. If we don=E2=80=99t add an opt=
ion code for 464XLAT, then it can=E2=80=99t be managed the same way.</span><o:p></o:p></p><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:au=
to;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US style=
=3D'font-size:10.5pt;color:black'><br></span><span lang=3DES-TRAD style=3D'=
font-size:10.5pt;color:black'>Regards,</span><o:p></o:p></p><p class=3DMsoN=
ormal style=3D'mso-margin-top-alt:auto;margin-bottom:12.0pt;margin-left:35.=
4pt'><span lang=3DES-TRAD style=3D'font-size:10.5pt;color:black'>Jordi</spa=
n><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-=
margin-bottom-alt:auto;margin-left:35.4pt;margin-bottom:12..0pt'><span lang=
=3DES-TRAD style=3D'font-size:10.5pt;color:black'>&nbsp;</span><o:p></o:p><=
/p></div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-b=
ottom-alt:auto;margin-left:35.4pt'><span lang=3DES-TRAD>&nbsp;</span><o:p><=
/o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-b=
ottom-alt:auto;margin-left:35.4pt'><span lang=3DES-TRAD>&nbsp;</span><o:p><=
/o:p></p><div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3=
.0pt 0cm 0cm 0cm'><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso=
-margin-bottom-alt:auto;margin-left:70.8pt'><b><span style=3D'font-size:12.=
0pt;color:black'>De: </span></b><span style=3D'font-size:12.0pt;color:black=
'>v6ops &lt;<a href=3D"mailto:v6ops-bounces@ietf.org" target=3D"_blank">v6o=
ps-bounces@ietf.org</a>&gt; en nombre de Lorenzo Colitti &lt;lorenzo=3D<a h=
ref=3D"mailto:40google.com@dmarc.ietf.org" target=3D"_blank">40google.com@d=
marc.ietf.org</a>&gt;<br><b>Fecha: </b>mi=C3=A9rcoles, 13 de junio de 2018,=
 4:45<br><b>Para: </b>&lt;jordi.palet=3D<a href=3D"mailto:40consulintel.es@=
dmarc.ietf.org" target=3D"_blank">40consulintel.es@dmarc.ietf.org</a>&gt;<b=
r><b>CC: </b>&quot;<a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6op=
s@ietf.org</a> WG&quot; &lt;<a href=3D"mailto:v6ops@ietf.org" target=3D"_bl=
ank">v6ops@ietf.org</a>&gt;<br><b>Asunto: </b>Re: [v6ops] updating RFC8026 =
to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas</span><o:p></o:p>=
</p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-ma=
rgin-bottom-alt:auto;margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div><div><d=
iv><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bo=
ttom-alt:auto;margin-left:70.8pt'>On Tue, Jun 12, 2018 at 7:40 PM JORDI PAL=
ET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:40consulintel.es@dmarc.ietf=
.org" target=3D"_blank">40consulintel..es@dmarc.ietf.org</a>&gt; wrote:<o:p=
></o:p></p></div><blockquote style=3D'border:none;border-left:solid #CCCCCC=
 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-=
right:0cm;margin-bottom:5.0pt'><div><div><p class=3DMsoNormal style=3D'mso-=
margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'>You don=
=E2=80=99t need RFC7050 neither DNS64, you can use PCP (RFC7225) to tell th=
e CLAT the NAT64 prefix. It also provides additional advantages to the oper=
ator to control many related aspects (see section 3 of RFC7225).<o:p></o:p>=
</p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom=
-alt:auto;margin-left:70.8pt'><span lang=3DEN-US>&nbsp;</span><o:p></o:p></=
p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:142.2pt'><span lang=3DEN-US>1.</span><span lang=3DEN-US=
 style=3D'font-size:7.0pt;font-family:"Times New Roman",serif'>&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp;&nbsp; </span><span lang=3DEN-US>If the operator wants to=
 enable 464xlat: they should hand out a DNS64 to the CPE.</span><o:p></o:p>=
</p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom=
-alt:auto;margin-left:142.2pt'><span lang=3DEN-US>2.</span><span lang=3DEN-=
US style=3D'font-size:7.0pt;font-family:"Times New Roman",serif'>&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp; </span><span lang=3DEN-US>If the operator wants =
to disable&nbsp;464xlat: they should NOT hand out a DNS64 to the CPE.</span=
><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto;margin-left:70.8pt'><span lang=3DEN-US>This doesn=E2=
=80=99t work, because the operator may be using RFC7225 instead of RFC7050.=
 You need to try both in that case, and you aren=E2=80=99t providing a =E2=
=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which is what RFC8026 does.</span><o:p></o:p></p></div></div></blockquote><d=
iv><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto;margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div><div><p class=3DMso=
Normal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-l=
eft:70.8pt'>But it's the same problem again: what's the use case for this D=
HCPv6 option? An operator that's using RFC7225 has an easy way to tell the =
CPE not to do 464xlat: don't hand out the prefix64 to those CPEs. So this i=
s already possible today.<o:p></o:p></p></div><div><p class=3DMsoNormal sty=
le=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt=
'>&nbsp;&nbsp;<o:p></o:p></p></div><blockquote style=3D'border:none;border-=
left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin=
-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><div><div><p class=3DMsoNo=
rmal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-lef=
t:142.2pt'><span lang=3DEN-US>3.</span><span lang=3DEN-US style=3D'font-siz=
e:7.0pt;font-family:"Times New Roman",serif'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp; </span><span lang=3DEN-US>If the operator uses 464xlat, they should =
not allow the user to change the DNS server.</span><o:p></o:p></p><p class=
=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;ma=
rgin-left:70.8pt'><span lang=3DEN-US>&nbsp;</span><o:p></o:p></p><p class=
=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;ma=
rgin-left:70.8pt'><span lang=3DEN-US>&nbsp;</span><o:p></o:p></p><p class=
=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;ma=
rgin-left:70.8pt'><span lang=3DEN-US>Let=E2=80=99s be realistic. You can=E2=
=80=99t =E2=80=9Cforce=E2=80=9D the customer to avoid changing the DNS =E2=
=80=A6</span><o:p></o:p></p></div></div></blockquote><div><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left=
:70.8pt'>&nbsp;<o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-=
margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'>On an op=
erator-managed CPE, you can. On a user-managed CPE, you can't. But on such =
a CPE you probably shouldn't be disabling 464xlat. If the user wants to use=
 it, it's their CPE, right?<o:p></o:p></p></div></div></div><p class=3DMsoN=
ormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-le=
ft:70.8pt'>_______________________________________________ v6ops mailing li=
st <a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6ops@ietf.org</a> <=
a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" target=3D"_blank">ht=
tps://www.ietf.org/mailman/listinfo/v6ops</a> <o:p></o:p></p></div><p class=
=3DMsoNormal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom=
:12.0pt;margin-left:35.4pt'><br>*******************************************=
***<br>IPv4 is over<br>Are you ready for the new Internet ?<br><a href=3D"h=
ttp://www.consulintel.es" target=3D"_blank">http://www.consulintel.es</a><b=
r>The IPv6 Company<br><br>This electronic message contains information whic=
h may be privileged or confidential. The information is intended to be for =
the exclusive use of the individual(s) named above and further non-explicil=
ty authorized disclosure, copying, distribution or use of the contents of t=
his information, even if partially, including attached files, is strictly p=
rohibited and will be considered a criminal offense. If you are not the int=
ended recipient be aware that any disclosure, copying, distribution or use =
of the contents of this information, even if partially, including attached =
files, is strictly prohibited, will be considered a criminal offense, so yo=
u must reply to the original sender to inform about this communication and =
delete it.<o:p></o:p></p></div></blockquote></div><p class=3DMsoNormal styl=
e=3D'margin-left:35.4pt'>_______________________________________________ v6=
ops mailing list v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops=
 <o:p></o:p></p></div><br>**********************************************<br=
>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
<br>
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--B_3611728368_1231216232--


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From: Mark Andrews <marka@isc.org>
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Date: Wed, 13 Jun 2018 17:58:44 +1000
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References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <8F8C6328-7A18-4399-A0DE-19EDB280E238@consulintel.es>
To: JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/uTIP559PfryRL7f82qWHHhzBUgA>
Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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> On 13 Jun 2018, at 5:52 pm, JORDI PALET MARTINEZ =
<jordi.palet=3D40consulintel.es@dmarc.ietf.org> wrote:
>=20
> I don=E2=80=99t think is fair to judge if 464XLAT is better or worse =
than other transition mechanism because it was not included in RFC8026 =
=E2=80=A6
> =20
> By the way, I realized also that some CLAT implementations are taking =
by default the NAT64 WKP (64:ff9b::/96, and other prefixes can be =
manually configured by GUI or CLI), so in fact, one more example that =
DNS64 is not needed and you may not need to implement at all RFC7050 =
neither RFC7225, so one more reason for requiring this change.
> =20
> Note that I=E2=80=99m not saying is good a CLAT with by default the =
WKP NAT64, because it means the operator is forced to use the WKP, =
however, I =E2=80=98ve the feeling that in 99% of the NAT64 deployments =
is done that way ...
>=20
> Regards,
> Jordi

Even if they are currently, in the later stages of the transition =
ISP=E2=80=99s may want to outsource ipv4aas.  When that is done the WKP =
won=E2=80=99t work.  You need a specific prefix to direct the traffic to =
the outsource operator.

Outsourcing is possible for all the ipv4aas mechanisms AFAIK.

--=20
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka@isc.org


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Date: Wed, 13 Jun 2018 10:04:38 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Mark Andrews <marka@isc.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>, Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>
Message-ID: <FE1CDC21-FEE3-49C9-A863-23143C3E0FE9@consulintel.es>
Thread-Topic: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <8F8C6328-7A18-4399-A0DE-19EDB280E238@consulintel.es> <FC640FCE-40C8-4F30-9A92-B812C3DE0253@isc.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/4VKxfalXjv2hV9iL9sbuK0Xb4Dc>
Subject: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Hi Mark,



Totally agree, in fact I've introduced several "outsourcing" scenarios for =
NAT64 in draft-palet-v6ops-nat64-deployment.



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de Mark Andrews <marka@isc.org=
>

Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 10:00

Para: JORDI PALET MARTINEZ <jordi.palet=3D40consulintel.es@dmarc.ietf.org>

CC: "v6ops@ietf.org WG" <v6ops@ietf.org>, Lorenzo Colitti <lorenzo=3D40goog=
le.com@dmarc.ietf.org>

Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas



   =20

    > On 13 Jun 2018, at 5:52 pm, JORDI PALET MARTINEZ <jordi.palet=3D40con=
sulintel.es@dmarc.ietf.org> wrote:

    >=20

    > I don=E2=80=99t think is fair to judge if 464XLAT is better or worse =
than other transition mechanism because it was not included in RFC8026 =E2=
=80=A6

    > =20

    > By the way, I realized also that some CLAT implementations are taking=
 by default the NAT64 WKP (64:ff9b::/96, and other prefixes can be manually=
 configured by GUI or CLI), so in fact, one more example that DNS64 is not =
needed and you may not need to implement at all RFC7050 neither RFC7225, so=
 one more reason for requiring this change.

    > =20

    > Note that I=E2=80=99m not saying is good a CLAT with by default the W=
KP NAT64, because it means the operator is forced to use the WKP, however, =
I =E2=80=98ve the feeling that in 99% of the NAT64 deployments is done that=
 way ...

    >=20

    > Regards,

    > Jordi

   =20

    Even if they are currently, in the later stages of the transition ISP=
=E2=80=99s may want to outsource ipv4aas.  When that is done the WKP won=E2=
=80=99t work.  You need a specific prefix to direct the traffic to the outs=
ource operator.

   =20

    Outsourcing is possible for all the ipv4aas mechanisms AFAIK.

   =20

    --=20

    Mark Andrews, ISC

    1 Seymour St., Dundas Valley, NSW 2117, Australia

    PHONE: +61 2 9871 4742              INTERNET: marka@isc.org

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




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From nobody Wed Jun 13 01:33:20 2018
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Subject: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-02.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IPv6 Operations WG of the IETF.

        Title           : Requirements for IPv6 Customer Edge Routers to Support IPv4 Connectivity as-a-Service
        Authors         : Jordi Palet Martinez
                          Hans M.-H. Liu
                          Masanobu Kawashima
	Filename        : draft-ietf-v6ops-transition-ipv4aas-02.txt
	Pages           : 20
	Date            : 2018-06-13

Abstract:
   This document specifies the IPv4 service continuity requirements for
   an IPv6 Customer Edge (CE) router, either provided by the service
   provider or thru the retail market.

   Specifically, this document extends the "Basic Requirements for IPv6
   Customer Edge Routers" in order to allow the provisioning of IPv6
   transition services for the support of "IPv4 as-a-Service" (IPv4aaS)
   by means of new transition mechanisms.  The document only covers
   transition technologies for delivering IPv4 in IPv6-only access
   networks, commonly called "IPv4 as-a-Service" (IPv4aaS), as required
   in a world where IPv4 addresses are no longer available, so hosts in
   the customer LANs with IPv4-only or IPv6-only applications or
   devices, requiring to communicate with IPv4-only services at the
   Internet, are still able to do so.

   In order to be able to prioritize, in a uniform way, among all the
   transition mechanisms, and to enable the service provider to enable/
   disable them, this document updates RFC8026.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas-02
https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-transition-ipv4aas-02

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-v6ops-transition-ipv4aas-02


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
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Thread-Topic: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-02.txt
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-02.txt
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Hi all,



This is an updated version (-02) of=20



https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/?inclu=
de_text=3D1



Main changes are depicted in ANNEX D:



   1.  TRANS requirements reworked in order to increase operator control

       and allow gradual transitioning from dual-stack to IPv6-only on

       specific customers.



   2.  New TRANS requirement so all the supported transition mechanisms

       are disabled by default, in order to facilitate the operator

       management.



   3.  New TRANS requirement in order to allow turning on/off each

       transition mechanism by the user.



   4.  Clarification on how to obtain multiple /64 for 464XLAT.



   5.  S46 priority update to RFC8026 for including 464XLAT and related

       changes in several sections.



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de <internet-drafts@ietf.org>

Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 10:33

Para: <i-d-announce@ietf.org>

CC: <v6ops@ietf.org>

Asunto: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-02.txt



   =20

    A New Internet-Draft is available from the on-line Internet-Drafts dire=
ctories.

    This draft is a work item of the IPv6 Operations WG of the IETF.

   =20

            Title           : Requirements for IPv6 Customer Edge Routers t=
o Support IPv4 Connectivity as-a-Service

            Authors         : Jordi Palet Martinez

                              Hans M.-H. Liu

                              Masanobu Kawashima

    	Filename        : draft-ietf-v6ops-transition-ipv4aas-02.txt

    	Pages           : 20

    	Date            : 2018-06-13

   =20

    Abstract:

       This document specifies the IPv4 service continuity requirements for

       an IPv6 Customer Edge (CE) router, either provided by the service

       provider or thru the retail market.

   =20

       Specifically, this document extends the "Basic Requirements for IPv6

       Customer Edge Routers" in order to allow the provisioning of IPv6

       transition services for the support of "IPv4 as-a-Service" (IPv4aaS)

       by means of new transition mechanisms.  The document only covers

       transition technologies for delivering IPv4 in IPv6-only access

       networks, commonly called "IPv4 as-a-Service" (IPv4aaS), as required

       in a world where IPv4 addresses are no longer available, so hosts in

       the customer LANs with IPv4-only or IPv6-only applications or

       devices, requiring to communicate with IPv4-only services at the

       Internet, are still able to do so.

   =20

       In order to be able to prioritize, in a uniform way, among all the

       transition mechanisms, and to enable the service provider to enable/

       disable them, this document updates RFC8026.

   =20

   =20

    The IETF datatracker status page for this draft is:

    https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/

   =20

    There are also htmlized versions available at:

    https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas-02

    https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-transition-ipv4a=
as-02

   =20

    A diff from the previous version is available at:

    https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-v6ops-transition-ipv4aas=
-02

   =20

   =20

    Please note that it may take a couple of minutes from the time of submi=
ssion

    until the htmlized version and diff are available at tools.ietf.org.

   =20

    Internet-Drafts are also available by anonymous FTP at:

    ftp://ftp.ietf.org/internet-drafts/

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




**********************************************
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Subject: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Dear Lorenzo,

I think it is a rather strong statement that "464XLAT is pretty much the 
worse of the transition mechanisms from a technical perspective."

We have listed 26+ IPv6 transition technologies in our workshop paper 
[1], but there are even more solutions exist.

Which of them do you mean to be better than 464XLAT?

What technical points do you consider when stating that 464XLAT is worse 
than the others? (E.g. resource consumption, scalability, security, ease 
of implementation, etc.)

I think it is important for network operators to have a balanced view of 
the advantages and disadvantages of the different IPv6 transition 
mechanisms, this is why I am asking these questions.

Best regards,

Gábor Lencse


[1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition 
Technologies for Security Analysis", IEICE Communications Society 
Internet Architecture Workshop, Tokyo, Japan, Aug. 28, 2017, /IEICE 
Tech. Rep./, vol. 117, no. 187, pp. 19-24. Available online: 
http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf


6/13/2018 9:38 AM keltezéssel, Lorenzo Colitti írta:
> That goes back to my earlier point of that from a technical 
> perspective 464xlat is pretty much the worst of the transition 
> mechanisms.. I don't think we should be recommending running it on 
> wireline at all, let alone prioritizing it over something else .:-)
>
> On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET MARTINEZ 
> <jordi.palet=40consulintel.es@dmarc.ietf.org 
> <mailto:40consulintel.es@dmarc.ietf.org>> wrote:
>
>     Lorenzo, you’re missing the key aspect: Being able to prioritize,
>     when an ISP supports several transition mechanisms.
>
>     RFC8026 key aspect is priority. If we don’t add an option code for
>     464XLAT, then it can’t be managed the same way.
>
>
>     Regards,
>
>     Jordi
>
>     *De: *v6ops <v6ops-bounces@ietf.org
>     <mailto:v6ops-bounces@ietf.org>> en nombre de Lorenzo Colitti
>     <lorenzo=40google.com@dmarc.ietf.org
>     <mailto:40google.com@dmarc.ietf.org>>
>     *Fecha: *miércoles, 13 de junio de 2018, 4:45
>     *Para: *<jordi.palet=40consulintel.es@dmarc.ietf.org
>     <mailto:40consulintel.es@dmarc.ietf.org>>
>     *CC: *"v6ops@ietf.org <mailto:v6ops@ietf.org> WG" <v6ops@ietf.org
>     <mailto:v6ops@ietf.org>>
>     *Asunto: *Re: [v6ops] updating RFC8026 to support 464XLAT in
>     draft-ietf-v6ops-transition-ipv4aas
>
>     On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ
>     <jordi.palet=40consulintel..es@dmarc.ietf.org
>     <mailto:40consulintel.es@dmarc.ietf.org>> wrote:
>
>         You don’t need RFC7050 neither DNS64, you can use PCP
>         (RFC7225) to tell the CLAT the NAT64 prefix. It also provides
>         additional advantages to the operator to control many related
>         aspects (see section 3 of RFC7225).
>
>         1.If the operator wants to enable 464xlat: they should hand
>         out a DNS64 to the CPE.
>
>         2.If the operator wants to disable 464xlat: they should NOT
>         hand out a DNS64 to the CPE.
>
>         This doesn’t work, because the operator may be using RFC7225
>         instead of RFC7050. You need to try both in that case, and you
>         aren’t providing a “priority” to a possible list of
>         mechanisms, which is what RFC8026 does.
>
>     But it's the same problem again: what's the use case for this
>     DHCPv6 option? An operator that's using RFC7225 has an easy way to
>     tell the CPE not to do 464xlat: don't hand out the prefix64 to
>     those CPEs. So this is already possible today.
>
>         3.If the operator uses 464xlat, they should not allow the user
>         to change the DNS server.
>
>         Let’s be realistic. You can’t “force” the customer to avoid
>         changing the DNS …
>
>     On an operator-managed CPE, you can. On a user-managed CPE, you
>     can't. But on such a CPE you probably shouldn't be disabling
>     464xlat. If the user wants to use it, it's their CPE, right?
>
>     _______________________________________________ v6ops mailing list
>     v6ops@ietf.org <mailto:v6ops@ietf.org>
>     https://www.ietf.org/mailman/listinfo/v6ops
>
>
>     **********************************************
>     IPv4 is over
>     Are you ready for the new Internet ?
>     http://www.consulintel.es
>     The IPv6 Company
>
>     This electronic message contains information which may be
>     privileged or confidential. The information is intended to be for
>     the exclusive use of the individual(s) named above and further
>     non-explicilty authorized disclosure, copying, distribution or use
>     of the contents of this information, even if partially, including
>     attached files, is strictly prohibited and will be considered a
>     criminal offense. If you are not the intended recipient be aware
>     that any disclosure, copying, distribution or use of the contents
>     of this information, even if partially, including attached files,
>     is strictly prohibited, will be considered a criminal offense, so
>     you must reply to the original sender to inform about this
>     communication and delete it.
>
>
>
> _______________________________________________
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> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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<html>
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    <meta content="text/html; charset=windows-1252"
      http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    Dear Lorenzo,<br>
    <br>
    I think it is a rather strong statement that "464XLAT is pretty much
    the worse of the transition mechanisms from a technical
    perspective."<br>
    <br>
    We have listed 26+ IPv6 transition technologies in our workshop
    paper [1], but there are even more solutions exist. <br>
    <br>
    Which of them do you mean to be better than 464XLAT?<br>
    <br>
    What technical points do you consider when stating that 464XLAT is
    worse than the others? (E.g. resource consumption, scalability,
    security, ease of implementation, etc.)<br>
    <br>
    I think it is important for network operators to have a balanced
    view of the advantages and disadvantages of the different IPv6
    transition mechanisms, this is why I am asking these questions.<br>
    <br>
    Best regards,<br>
    <br>
    Gábor Lencse<br>
    <br>
    <br>
    [1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition
    Technologies for Security Analysis", IEICE Communications Society
    Internet Architecture Workshop, Tokyo, Japan, Aug. 28, 2017, <i>IEICE
      Tech. Rep.</i>, vol. 117, no. 187, pp. 19-24. Available online:
    <a class="moz-txt-link-freetext" href="http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf">http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf</a><br>
    <br>
    <br>
    <div class="moz-cite-prefix">6/13/2018 9:38 AM keltezéssel, Lorenzo
      Colitti írta:<br>
    </div>
    <blockquote
cite="mid:CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com"
      type="cite">
      <div dir="ltr">That goes back to my earlier point of that from a
        technical perspective 464xlat is pretty much the worst of the
        transition mechanisms.. I don't think we should be recommending
        running it on wireline at all, let alone prioritizing it over
        something else .:-)</div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr">On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET
          MARTINEZ &lt;jordi.palet=<a moz-do-not-send="true"
            href="mailto:40consulintel.es@dmarc.ietf.org">40consulintel.es@dmarc.ietf.org</a>&gt;
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0 0 0
          .8ex;border-left:1px #ccc solid;padding-left:1ex">
          <div link="blue" vlink="purple" lang="ES">
            <div class="m_-2528391801406928691WordSection1">
              <p class="MsoNormal"><span lang="EN-US">Lorenzo, you’re
                  missing the key aspect: Being able to prioritize, when
                  an ISP supports several transition mechanisms.</span></p>
              <p class="MsoNormal"><span lang="EN-US"> </span></p>
              <p class="MsoNormal"><span lang="EN-US">RFC8026 key aspect
                  is priority. If we don’t add an option code for
                  464XLAT, then it can’t be managed the same way.</span></p>
              <div>
                <p class="MsoNormal"><span
                    style="font-size:10.5pt;color:black" lang="EN-US"><br>
                  </span><span style="font-size:10.5pt;color:black"
                    lang="ES-TRAD">Regards,</span></p>
                <p class="MsoNormal" style="margin-bottom:12.0pt"><span
                    style="font-size:10.5pt;color:black" lang="ES-TRAD">Jordi</span></p>
                <p class="MsoNormal" style="margin-bottom:12..0pt"><span
                    style="font-size:10.5pt;color:black" lang="ES-TRAD"> </span></p>
              </div>
              <p class="MsoNormal"><span lang="ES-TRAD"> </span></p>
              <p class="MsoNormal"><span lang="ES-TRAD"> </span></p>
              <div style="border:none;border-top:solid #b5c4df
                1.0pt;padding:3.0pt 0cm 0cm 0cm">
                <p class="MsoNormal" style="margin-left:35.4pt"><b><span
                      style="font-size:12.0pt;color:black">De: </span></b><span
                    style="font-size:12.0pt;color:black">v6ops &lt;<a
                      moz-do-not-send="true"
                      href="mailto:v6ops-bounces@ietf.org"
                      target="_blank">v6ops-bounces@ietf.org</a>&gt; en
                    nombre de Lorenzo Colitti &lt;lorenzo=<a
                      moz-do-not-send="true"
                      href="mailto:40google.com@dmarc.ietf.org"
                      target="_blank">40google.com@dmarc.ietf.org</a>&gt;<br>
                    <b>Fecha: </b>miércoles, 13 de junio de 2018, 4:45<br>
                    <b>Para: </b>&lt;jordi.palet=<a
                      moz-do-not-send="true"
                      href="mailto:40consulintel.es@dmarc.ietf.org"
                      target="_blank">40consulintel.es@dmarc.ietf.org</a>&gt;<br>
                    <b>CC: </b>"<a moz-do-not-send="true"
                      href="mailto:v6ops@ietf.org" target="_blank">v6ops@ietf.org</a>
                    WG" &lt;<a moz-do-not-send="true"
                      href="mailto:v6ops@ietf.org" target="_blank">v6ops@ietf.org</a>&gt;<br>
                    <b>Asunto: </b>Re: [v6ops] updating RFC8026 to
                    support 464XLAT in
                    draft-ietf-v6ops-transition-ipv4aas</span></p>
              </div>
              <div>
                <p class="MsoNormal" style="margin-left:35.4pt"> </p>
              </div>
              <div>
                <div>
                  <div>
                    <p class="MsoNormal" style="margin-left:35.4pt">On
                      Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ
                      &lt;jordi.palet=<a moz-do-not-send="true"
                        href="mailto:40consulintel.es@dmarc.ietf.org"
                        target="_blank">40consulintel..es@dmarc.ietf.org</a>&gt;
                      wrote:</p>
                  </div>
                  <blockquote style="border:none;border-left:solid
                    #cccccc 1.0pt;padding:0cm 0cm 0cm
                    6.0pt;margin-left:4.8pt;margin-right:0cm">
                    <div>
                      <div>
                        <p class="MsoNormal" style="margin-left:35.4pt">You
                          don’t need RFC7050 neither DNS64, you can use
                          PCP (RFC7225) to tell the CLAT the NAT64
                          prefix. It also provides additional advantages
                          to the operator to control many related
                          aspects (see section 3 of RFC7225).</p>
                        <p class="MsoNormal" style="margin-left:35.4pt"><span
                            lang="EN-US"> </span></p>
                        <p class="MsoNormal" style="margin-left:106.8pt"><span
                            lang="EN-US">1.</span><span
                            style="font-size:7.0pt;font-family:&quot;Times
                            New Roman&quot;,serif" lang="EN-US">       </span><span
                            lang="EN-US">If the operator wants to enable
                            464xlat: they should hand out a DNS64 to the
                            CPE.</span></p>
                        <p class="MsoNormal" style="margin-left:106.8pt"><span
                            lang="EN-US">2.</span><span
                            style="font-size:7.0pt;font-family:&quot;Times
                            New Roman&quot;,serif" lang="EN-US">       </span><span
                            lang="EN-US">If the operator wants to
                            disable 464xlat: they should NOT hand out a
                            DNS64 to the CPE.</span></p>
                        <p class="MsoNormal" style="margin-left:35.4pt"><span
                            lang="EN-US">This doesn’t work, because the
                            operator may be using RFC7225 instead of
                            RFC7050. You need to try both in that case,
                            and you aren’t providing a “priority” to a
                            possible list of mechanisms, which is what
                            RFC8026 does.</span></p>
                      </div>
                    </div>
                  </blockquote>
                  <div>
                    <p class="MsoNormal" style="margin-left:35.4pt"> </p>
                  </div>
                  <div>
                    <p class="MsoNormal" style="margin-left:35.4pt">But
                      it's the same problem again: what's the use case
                      for this DHCPv6 option? An operator that's using
                      RFC7225 has an easy way to tell the CPE not to do
                      464xlat: don't hand out the prefix64 to those
                      CPEs. So this is already possible today.</p>
                  </div>
                  <div>
                    <p class="MsoNormal" style="margin-left:35.4pt">  </p>
                  </div>
                  <blockquote style="border:none;border-left:solid
                    #cccccc 1.0pt;padding:0cm 0cm 0cm
                    6.0pt;margin-left:4.8pt;margin-right:0cm">
                    <div>
                      <div>
                        <p class="MsoNormal" style="margin-left:106.8pt"><span
                            lang="EN-US">3.</span><span
                            style="font-size:7.0pt;font-family:&quot;Times
                            New Roman&quot;,serif" lang="EN-US">       </span><span
                            lang="EN-US">If the operator uses 464xlat,
                            they should not allow the user to change the
                            DNS server.</span></p>
                        <p class="MsoNormal" style="margin-left:35.4pt"><span
                            lang="EN-US"> </span></p>
                        <p class="MsoNormal" style="margin-left:35.4pt"><span
                            lang="EN-US"> </span></p>
                        <p class="MsoNormal" style="margin-left:35.4pt"><span
                            lang="EN-US">Let’s be realistic. You can’t
                            “force” the customer to avoid changing the
                            DNS …</span></p>
                      </div>
                    </div>
                  </blockquote>
                  <div>
                    <p class="MsoNormal" style="margin-left:35.4pt"> </p>
                  </div>
                  <div>
                    <p class="MsoNormal" style="margin-left:35.4pt">On
                      an operator-managed CPE, you can. On a
                      user-managed CPE, you can't. But on such a CPE you
                      probably shouldn't be disabling 464xlat. If the
                      user wants to use it, it's their CPE, right?</p>
                  </div>
                </div>
              </div>
              <p class="MsoNormal" style="margin-left:35.4pt">_______________________________________________
                v6ops mailing list <a moz-do-not-send="true"
                  href="mailto:v6ops@ietf.org" target="_blank">v6ops@ietf.org</a>
                <a moz-do-not-send="true"
                  href="https://www.ietf.org/mailman/listinfo/v6ops"
                  target="_blank">https://www.ietf.org/mailman/listinfo/v6ops</a>
              </p>
            </div>
            <br>
            **********************************************<br>
            IPv4 is over<br>
            Are you ready for the new Internet ?<br>
            <a moz-do-not-send="true" href="http://www.consulintel.es"
              target="_blank">http://www.consulintel.es</a><br>
            The IPv6 Company<br>
            <br>
            This electronic message contains information which may be
            privileged or confidential. The information is intended to
            be for the exclusive use of the individual(s) named above
            and further non-explicilty authorized disclosure, copying,
            distribution or use of the contents of this information,
            even if partially, including attached files, is strictly
            prohibited and will be considered a criminal offense. If you
            are not the intended recipient be aware that any disclosure,
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            information, even if partially, including attached files, is
            strictly prohibited, will be considered a criminal offense,
            so you must reply to the original sender to inform about
            this communication and delete it.<br>
            <br>
          </div>
        </blockquote>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
v6ops mailing list
<a class="moz-txt-link-abbreviated" href="mailto:v6ops@ietf.org">v6ops@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mailman/listinfo/v6ops</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>

--------------145621110D1AA7D5F60123BD--


From nobody Wed Jun 13 02:21:09 2018
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To: Jen Linkova <furry13@gmail.com>
Cc: V6 Ops List <v6ops@ietf.org>
References: <5e02c3d9-5382-205e-f552-496da5c529bc@gmail.com> <a9f102f7-419c-b32c-ab8e-769a245fcb5c@tbonet.net.br> <1d3f3c55-9a06-8354-b6cd-a25cc2771422@gmail.com> <CAFU7BAQpaCsvs7NWPw2CW3WKP66PRCHrsrKLg49aQtBcEuw6hQ@mail.gmail.com>
From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Subject: Re: [v6ops] When IPv6 breaks IPv4
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Le 27/04/2018 à 05:12, Jen Linkova a écrit :
> On Thu, Apr 26, 2018 at 6:42 PM, Alexandre Petrescu
> <alexandre.petrescu@gmail.com> wrote:
>> Even us, at IETF, whenever we write a new hot Internet Draft we put it
>> on an IPv4 website first.
> Actually we we don't.
> 
>> (I guess datatracker is not reachable on IPv6,
>> just guess.)
> 
> I've just completely disabled IPv4 on my workstation and
> https://datatracker.ietf.org works just fine (I tested browsing the
> drafts and some links on WG Chair dashboard).

I have just used an IPv6 linux laptop on an IPv6 cellular link that 
gives no IPv4.

The laptop connects ok to https://ietf.org, tools.ietf.org.  I have even 
tried to register for the next meeting.  I went with the process up to 
filling the data, but stopped there.

There are however some websites that dont work, like github.com.  Many 
people use github for IETF work like drafts, charters, etc.

Alex


From nobody Wed Jun 13 03:13:22 2018
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Date: Wed, 13 Jun 2018 12:12:28 +0200
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/p12aqeoEPn6Xi2XfW3WZHuE3xn0>
Subject: Re: [v6ops] [DNSOP] [IANA #989438] ipv4only.arpa's delegation should be insecure.
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>https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-arpa 
><https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-arpa>

>From Section 6.2:
3.  Name resolution APIs and libraries MUST recognize 'ipv4only.arpa'
       as special and MUST give it special treatment.  Regardless of any
       manual client DNS configuration, DNS overrides configured by VPN
       client software, or any other mechanisms that influence the
       choice of the client's recursive resolver address(es) (including
       client devices that run their own local recursive resolver and
       use the loopback address as their configured recursive resolver
       address) all queries for 'ipv4only.arpa' and any subdomains of
       that name MUST be sent to the recursive resolver learned from the
       network via IPv6 Router Advertisement Options for DNS
       Configuration [RFC6106] or via DNS Configuration options for
       DHCPv6 [RFC3646].

First we introduce ipv4only.arpa as a hack to avoid creating/deploying a
suitable mechanism to communicate the NAT64 translation prefix. That's fine
with me.

But when that hack then requires changes to every possible DNS stub resolver
implementation in the world, there is something seriously wrong.

So if this in indeeed required to make RFC7050 work then it is better to
formally deprecate RFC7050 and focus on other ways to discover the
translation prefix.

It seems that at least one already exists (RFC7225) so not much is lost.



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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Philip Homburg <pch-v6ops-8@u-1.phicoh.com>, <v6ops@ietf.org>
CC: Stuart Cheshire <cheshire@apple.com>, Michelle Cotton via RT <iana-questions@iana.org>, dnsop <dnsop@ietf.org>, David Schinazi <dschinazi@apple.com>
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Thread-Topic: [DNSOP] [v6ops] [IANA #989438] ipv4only.arpa's delegation should be insecure.
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Subject: Re: [v6ops] [DNSOP] [IANA #989438] ipv4only.arpa's delegation should be insecure.
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Hi Philip,



Agree, ideally, should be a DHCPv6 bases mechanism as we already proposed l=
ong time ago, because PCP is not present in many networks (unfortunately), =
while DHCP is quite common.



We are happy to resurrect and review this work if needed:

https://tools.ietf.org/html/draft-li-intarea-nat64-prefix-dhcp-option-01



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: DNSOP <dnsop-bounces@ietf.org> en nombre de Philip Homburg <pch-v6ops-8=
@u-1.phicoh.com>

Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 12:42

Para: <v6ops@ietf.org>

CC: Stuart Cheshire <cheshire@apple.com>, Michelle Cotton via RT <iana-ques=
tions@iana.org>, dnsop <dnsop@ietf.org>, David Schinazi <dschinazi@apple.co=
m>

Asunto: Re: [DNSOP] [v6ops] [IANA #989438] ipv4only.arpa's delegation shoul=
d be insecure.



    >https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-arpa=20

    ><https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-arpa>

   =20

    >From Section 6.2:

    3.  Name resolution APIs and libraries MUST recognize 'ipv4only.arpa'

           as special and MUST give it special treatment.  Regardless of an=
y

           manual client DNS configuration, DNS overrides configured by VPN

           client software, or any other mechanisms that influence the

           choice of the client's recursive resolver address(es) (including

           client devices that run their own local recursive resolver and

           use the loopback address as their configured recursive resolver

           address) all queries for 'ipv4only.arpa' and any subdomains of

           that name MUST be sent to the recursive resolver learned from th=
e

           network via IPv6 Router Advertisement Options for DNS

           Configuration [RFC6106] or via DNS Configuration options for

           DHCPv6 [RFC3646].

   =20

    First we introduce ipv4only.arpa as a hack to avoid creating/deploying =
a

    suitable mechanism to communicate the NAT64 translation prefix. That's =
fine

    with me.

   =20

    But when that hack then requires changes to every possible DNS stub res=
olver

    implementation in the world, there is something seriously wrong.

   =20

    So if this in indeeed required to make RFC7050 work then it is better t=
o

    formally deprecate RFC7050 and focus on other ways to discover the

    translation prefix.

   =20

    It seems that at least one already exists (RFC7225) so not much is lost=
.

   =20

   =20

    _______________________________________________

    DNSOP mailing list

    DNSOP@ietf.org

    https://www.ietf.org/mailman/listinfo/dnsop

   =20




**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.




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References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <da095b32-3bb9-d2ec-dd41-e6e526cff83f@hit.bme.hu>
In-Reply-To: <da095b32-3bb9-d2ec-dd41-e6e526cff83f@hit.bme.hu>
From: Lorenzo Colitti <lorenzo@google.com>
Date: Wed, 13 Jun 2018 19:55:25 +0900
Message-ID: <CAKD1Yr3ZbOLbsXFmZqa78ZJ9aaiFnCxAPUVOX26=VoqChA1g-A@mail.gmail.com>
To: lencse@hit.bme.hu
Cc: "v6ops@ietf.org WG" <v6ops@ietf.org>
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Subject: Re: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Here are a few disadvantages of 464xlat:

   - It consumes lots of state on the NAT64 (one state table entry for
   every connection). MAP is much better since it uses port ranges.
   - It doesn't allow any inbound connections unless the NAT cooperates.
   MAP is better in the sense that you can at least receive connections wit=
hin
   your port range.
   - The transformation is lossy because there are IPv4 header fields that
   cannot be translated. MAP-E is better because the encapsulation preserve=
s
   the original packet header.


On Wed, Jun 13, 2018 at 6:12 PM Lencse G=C3=A1bor <lencse@hit.bme.hu> wrote=
:

> Dear Lorenzo,
>
> I think it is a rather strong statement that "464XLAT is pretty much the
> worse of the transition mechanisms from a technical perspective."
>
> We have listed 26+ IPv6 transition technologies in our workshop paper [1]=
,
> but there are even more solutions exist.
>
> Which of them do you mean to be better than 464XLAT?
>
> What technical points do you consider when stating that 464XLAT is worse
> than the others? (E.g. resource consumption, scalability, security, ease =
of
> implementation, etc.)
>
> I think it is important for network operators to have a balanced view of
> the advantages and disadvantages of the different IPv6 transition
> mechanisms, this is why I am asking these questions.
>
> Best regards,
>
> G=C3=A1bor Lencse
>
>
> [1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition Technologies
> for Security Analysis", IEICE Communications Society Internet Architectur=
e
> Workshop, Tokyo, Japan, Aug. 28, 2017, *IEICE Tech. Rep.*, vol. 117, no.
> 187, pp. 19-24. Available online:
> http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf
>
>
> 6/13/2018 9:38 AM keltez=C3=A9ssel, Lorenzo Colitti =C3=ADrta:
>
> That goes back to my earlier point of that from a technical perspective
> 464xlat is pretty much the worst of the transition mechanisms.. I don't
> think we should be recommending running it on wireline at all, let alone
> prioritizing it over something else .:-)
>
> On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET MARTINEZ <jordi.palet=3D
> 40consulintel.es@dmarc.ietf.org> wrote:
>
>> Lorenzo, you=E2=80=99re missing the key aspect: Being able to prioritize=
, when an
>> ISP supports several transition mechanisms.
>>
>>
>>
>> RFC8026 key aspect is priority. If we don=E2=80=99t add an option code f=
or
>> 464XLAT, then it can=E2=80=99t be managed the same way.
>>
>>
>> Regards,
>>
>> Jordi
>>
>>
>>
>>
>>
>>
>>
>> *De: *v6ops <v6ops-bounces@ietf.org> en nombre de Lorenzo Colitti
>> <lorenzo=3D40google.com@dmarc.ietf.org>
>> *Fecha: *mi=C3=A9rcoles, 13 de junio de 2018, 4:45
>> *Para: *<jordi.palet=3D40consulintel.es@dmarc.ietf.org>
>> *CC: *"v6ops@ietf.org WG" <v6ops@ietf.org>
>> *Asunto: *Re: [v6ops] updating RFC8026 to support 464XLAT in
>> draft-ietf-v6ops-transition-ipv4aas
>>
>>
>>
>> On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ <jordi.palet=3D
>> 40consulintel..es@dmarc.ietf.org <40consulintel.es@dmarc.ietf.org>>
>> wrote:
>>
>> You don=E2=80=99t need RFC7050 neither DNS64, you can use PCP (RFC7225) =
to tell
>> the CLAT the NAT64 prefix. It also provides additional advantages to the
>> operator to control many related aspects (see section 3 of RFC7225).
>>
>>
>>
>> 1.       If the operator wants to enable 464xlat: they should hand out a
>> DNS64 to the CPE.
>>
>> 2.       If the operator wants to disable 464xlat: they should NOT hand
>> out a DNS64 to the CPE.
>>
>> This doesn=E2=80=99t work, because the operator may be using RFC7225 ins=
tead of
>> RFC7050. You need to try both in that case, and you aren=E2=80=99t provi=
ding a
>> =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which is wh=
at RFC8026 does.
>>
>>
>>
>> But it's the same problem again: what's the use case for this DHCPv6
>> option? An operator that's using RFC7225 has an easy way to tell the CPE
>> not to do 464xlat: don't hand out the prefix64 to those CPEs. So this is
>> already possible today.
>>
>>
>>
>> 3.       If the operator uses 464xlat, they should not allow the user to
>> change the DNS server.
>>
>>
>>
>>
>>
>> Let=E2=80=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D th=
e customer to avoid changing the
>> DNS =E2=80=A6
>>
>>
>>
>> On an operator-managed CPE, you can. On a user-managed CPE, you can't.
>> But on such a CPE you probably shouldn't be disabling 464xlat. If the us=
er
>> wants to use it, it's their CPE, right?
>>
>> _______________________________________________ v6ops mailing list
>> v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>>
>> **********************************************
>> IPv4 is over
>> Are you ready for the new Internet ?
>> http://www.consulintel.es
>> The IPv6 Company
>>
>> This electronic message contains information which may be privileged or
>> confidential. The information is intended to be for the exclusive use of
>> the individual(s) named above and further non-explicilty authorized
>> disclosure, copying, distribution or use of the contents of this
>> information, even if partially, including attached files, is strictly
>> prohibited and will be considered a criminal offense. If you are not the
>> intended recipient be aware that any disclosure, copying, distribution o=
r
>> use of the contents of this information, even if partially, including
>> attached files, is strictly prohibited, will be considered a criminal
>> offense, so you must reply to the original sender to inform about this
>> communication and delete it.
>>
>>
>
> _______________________________________________
> v6ops mailing listv6ops@ietf.orghttps://www.ietf.org/mailman/listinfo/v6o=
ps
>
>
> _______________________________________________
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> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>

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<div dir=3D"ltr">Here are a few disadvantages of 464xlat:<div><ul><li>It co=
nsumes lots of state on the NAT64 (one state table entry for every connecti=
on). MAP is much better since it uses port ranges.<br></li><li>It doesn&#39=
;t allow any inbound connections unless the NAT cooperates. MAP is better i=
n the sense that you can at least receive connections within your port rang=
e.</li><li>The transformation is lossy because there are IPv4 header fields=
 that cannot be translated. MAP-E is better because the encapsulation prese=
rves the original packet header.</li></ul></div></div><br><div class=3D"gma=
il_quote"><div dir=3D"ltr">On Wed, Jun 13, 2018 at 6:12 PM Lencse G=C3=A1bo=
r &lt;<a href=3D"mailto:lencse@hit.bme.hu">lencse@hit.bme.hu</a>&gt; wrote:=
<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord=
er-left:1px #ccc solid;padding-left:1ex">
 =20
   =20
 =20
  <div bgcolor=3D"#FFFFFF" text=3D"#000000">
    Dear Lorenzo,<br>
    <br>
    I think it is a rather strong statement that &quot;464XLAT is pretty mu=
ch
    the worse of the transition mechanisms from a technical
    perspective.&quot;<br>
    <br>
    We have listed 26+ IPv6 transition technologies in our workshop
    paper [1], but there are even more solutions exist. <br>
    <br>
    Which of them do you mean to be better than 464XLAT?<br>
    <br>
    What technical points do you consider when stating that 464XLAT is
    worse than the others? (E.g. resource consumption, scalability,
    security, ease of implementation, etc.)<br>
    <br>
    I think it is important for network operators to have a balanced
    view of the advantages and disadvantages of the different IPv6
    transition mechanisms, this is why I am asking these questions.<br>
    <br>
    Best regards,<br>
    <br>
    G=C3=A1bor Lencse<br>
    <br>
    <br>
    [1] G. Lencse and Y. Kadobayashi, &quot;Survey of IPv6 Transition
    Technologies for Security Analysis&quot;, IEICE Communications Society
    Internet Architecture Workshop, Tokyo, Japan, Aug. 28, 2017, <i>IEICE
      Tech. Rep.</i>, vol. 117, no. 187, pp. 19-24. Available online:
    <a class=3D"m_-5273822808446840467moz-txt-link-freetext" href=3D"http:/=
/www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf" target=3D"_b=
lank">http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf</=
a><br>
    <br>
    <br>
    <div class=3D"m_-5273822808446840467moz-cite-prefix">6/13/2018 9:38 AM =
keltez=C3=A9ssel, Lorenzo
      Colitti =C3=ADrta:<br>
    </div>
    <blockquote type=3D"cite">
      <div dir=3D"ltr">That goes back to my earlier point of that from a
        technical perspective 464xlat is pretty much the worst of the
        transition mechanisms.. I don&#39;t think we should be recommending
        running it on wireline at all, let alone prioritizing it over
        something else .:-)</div>
      <br>
      <div class=3D"gmail_quote">
        <div dir=3D"ltr">On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET
          MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:40consulintel.es@dma=
rc.ietf.org" target=3D"_blank">40consulintel.es@dmarc.ietf.org</a>&gt;
          wrote:<br>
        </div>
        <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border=
-left:1px #ccc solid;padding-left:1ex">
          <div link=3D"blue" vlink=3D"purple" lang=3D"ES">
            <div class=3D"m_-5273822808446840467m_-2528391801406928691WordS=
ection1">
              <p class=3D"MsoNormal"><span lang=3D"EN-US">Lorenzo, you=E2=
=80=99re
                  missing the key aspect: Being able to prioritize, when
                  an ISP supports several transition mechanisms.</span></p>
              <p class=3D"MsoNormal"><span lang=3D"EN-US">=C2=A0</span></p>
              <p class=3D"MsoNormal"><span lang=3D"EN-US">RFC8026 key aspec=
t
                  is priority. If we don=E2=80=99t add an option code for
                  464XLAT, then it can=E2=80=99t be managed the same way.</=
span></p>
              <div>
                <p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;colo=
r:black" lang=3D"EN-US"><br>
                  </span><span style=3D"font-size:10.5pt;color:black" lang=
=3D"ES-TRAD">Regards,</span></p>
                <p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span=
 style=3D"font-size:10.5pt;color:black" lang=3D"ES-TRAD">Jordi</span></p>
                <p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;colo=
r:black" lang=3D"ES-TRAD">=C2=A0</span></p>
              </div>
              <p class=3D"MsoNormal"><span lang=3D"ES-TRAD">=C2=A0</span></=
p>
              <p class=3D"MsoNormal"><span lang=3D"ES-TRAD">=C2=A0</span></=
p>
              <div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padd=
ing:3.0pt 0cm 0cm 0cm">
                <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><b><spa=
n style=3D"font-size:12.0pt;color:black">De: </span></b><span style=3D"font=
-size:12.0pt;color:black">v6ops &lt;<a href=3D"mailto:v6ops-bounces@ietf.or=
g" target=3D"_blank">v6ops-bounces@ietf.org</a>&gt; en
                    nombre de Lorenzo Colitti &lt;lorenzo=3D<a href=3D"mail=
to:40google.com@dmarc.ietf.org" target=3D"_blank">40google.com@dmarc.ietf.o=
rg</a>&gt;<br>
                    <b>Fecha: </b>mi=C3=A9rcoles, 13 de junio de 2018, 4:45=
<br>
                    <b>Para: </b>&lt;jordi.palet=3D<a href=3D"mailto:40cons=
ulintel.es@dmarc.ietf.org" target=3D"_blank">40consulintel.es@dmarc.ietf.or=
g</a>&gt;<br>
                    <b>CC: </b>&quot;<a href=3D"mailto:v6ops@ietf.org" targ=
et=3D"_blank">v6ops@ietf.org</a>
                    WG&quot; &lt;<a href=3D"mailto:v6ops@ietf.org" target=
=3D"_blank">v6ops@ietf.org</a>&gt;<br>
                    <b>Asunto: </b>Re: [v6ops] updating RFC8026 to
                    support 464XLAT in
                    draft-ietf-v6ops-transition-ipv4aas</span></p>
              </div>
              <div>
                <p class=3D"MsoNormal" style=3D"margin-left:35.4pt">=C2=A0<=
/p>
              </div>
              <div>
                <div>
                  <div>
                    <p class=3D"MsoNormal" style=3D"margin-left:35.4pt">On
                      Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ
                      &lt;jordi.palet=3D<a href=3D"mailto:40consulintel.es@=
dmarc.ietf.org" target=3D"_blank">40consulintel..es@dmarc.ietf.org</a>&gt;
                      wrote:</p>
                  </div>
                  <blockquote style=3D"border:none;border-left:solid #ccccc=
c 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
                    <div>
                      <div>
                        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"=
>You
                          don=E2=80=99t need RFC7050 neither DNS64, you can=
 use
                          PCP (RFC7225) to tell the CLAT the NAT64
                          prefix. It also provides additional advantages
                          to the operator to control many related
                          aspects (see section 3 of RFC7225).</p>
                        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"=
><span lang=3D"EN-US">=C2=A0</span></p>
                        <p class=3D"MsoNormal" style=3D"margin-left:106.8pt=
"><span lang=3D"EN-US">1.</span><span lang=3D"EN-US">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 </span><span lang=3D"EN-US">If the operator wants to enable
                            464xlat: they should hand out a DNS64 to the
                            CPE.</span></p>
                        <p class=3D"MsoNormal" style=3D"margin-left:106.8pt=
"><span lang=3D"EN-US">2.</span><span lang=3D"EN-US">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 </span><span lang=3D"EN-US">If the operator wants to
                            disable=C2=A0464xlat: they should NOT hand out =
a
                            DNS64 to the CPE.</span></p>
                        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"=
><span lang=3D"EN-US">This doesn=E2=80=99t work, because the
                            operator may be using RFC7225 instead of
                            RFC7050. You need to try both in that case,
                            and you aren=E2=80=99t providing a =E2=80=9Cpri=
ority=E2=80=9D to a
                            possible list of mechanisms, which is what
                            RFC8026 does.</span></p>
                      </div>
                    </div>
                  </blockquote>
                  <div>
                    <p class=3D"MsoNormal" style=3D"margin-left:35.4pt">=C2=
=A0</p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal" style=3D"margin-left:35.4pt">But
                      it&#39;s the same problem again: what&#39;s the use c=
ase
                      for this DHCPv6 option? An operator that&#39;s using
                      RFC7225 has an easy way to tell the CPE not to do
                      464xlat: don&#39;t hand out the prefix64 to those
                      CPEs. So this is already possible today.</p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal" style=3D"margin-left:35.4pt">=C2=
=A0=C2=A0</p>
                  </div>
                  <blockquote style=3D"border:none;border-left:solid #ccccc=
c 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
                    <div>
                      <div>
                        <p class=3D"MsoNormal" style=3D"margin-left:106.8pt=
"><span lang=3D"EN-US">3.</span><span lang=3D"EN-US">=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 </span><span lang=3D"EN-US">If the operator uses 464xlat,
                            they should not allow the user to change the
                            DNS server.</span></p>
                        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"=
><span lang=3D"EN-US">=C2=A0</span></p>
                        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"=
><span lang=3D"EN-US">=C2=A0</span></p>
                        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"=
><span lang=3D"EN-US">Let=E2=80=99s be realistic. You can=E2=80=99t
                            =E2=80=9Cforce=E2=80=9D the customer to avoid c=
hanging the
                            DNS =E2=80=A6</span></p>
                      </div>
                    </div>
                  </blockquote>
                  <div>
                    <p class=3D"MsoNormal" style=3D"margin-left:35.4pt">=C2=
=A0</p>
                  </div>
                  <div>
                    <p class=3D"MsoNormal" style=3D"margin-left:35.4pt">On
                      an operator-managed CPE, you can. On a
                      user-managed CPE, you can&#39;t. But on such a CPE yo=
u
                      probably shouldn&#39;t be disabling 464xlat. If the
                      user wants to use it, it&#39;s their CPE, right?</p>
                  </div>
                </div>
              </div>
              <p class=3D"MsoNormal" style=3D"margin-left:35.4pt">_________=
______________________________________
                v6ops mailing list <a href=3D"mailto:v6ops@ietf.org" target=
=3D"_blank">v6ops@ietf.org</a>
                <a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" tar=
get=3D"_blank">https://www.ietf.org/mailman/listinfo/v6ops</a>
              </p>
            </div>
            <br>
            **********************************************<br>
            IPv4 is over<br>
            Are you ready for the new Internet ?<br>
            <a href=3D"http://www.consulintel.es" target=3D"_blank">http://=
www.consulintel.es</a><br>
            The IPv6 Company<br>
            <br>
            This electronic message contains information which may be
            privileged or confidential. The information is intended to
            be for the exclusive use of the individual(s) named above
            and further non-explicilty authorized disclosure, copying,
            distribution or use of the contents of this information,
            even if partially, including attached files, is strictly
            prohibited and will be considered a criminal offense. If you
            are not the intended recipient be aware that any disclosure,
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            information, even if partially, including attached files, is
            strictly prohibited, will be considered a criminal offense,
            so you must reply to the original sender to inform about
            this communication and delete it.<br>
            <br>
          </div>
        </blockquote>
      </div>
      <br>
      <fieldset class=3D"m_-5273822808446840467mimeAttachmentHeader"></fiel=
dset>
      <br>
      <pre>_______________________________________________
v6ops mailing list
<a class=3D"m_-5273822808446840467moz-txt-link-abbreviated" href=3D"mailto:=
v6ops@ietf.org" target=3D"_blank">v6ops@ietf.org</a>
<a class=3D"m_-5273822808446840467moz-txt-link-freetext" href=3D"https://ww=
w.ietf.org/mailman/listinfo/v6ops" target=3D"_blank">https://www.ietf.org/m=
ailman/listinfo/v6ops</a>
</pre>
    </blockquote>
    <br>
  </div>

_______________________________________________<br>
v6ops mailing list<br>
<a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6ops@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" rel=3D"noreferrer" =
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From: Lee Howard <lee@asgard.org>
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Subject: Re: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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So you mean "stateful < stateless"?

I haven't looked recently at which packet headers get munged in what 
ways. Care to save us all half an hour of examining RFCs and tell us 
which ones?


Lee


On 06/13/2018 06:55 AM, Lorenzo Colitti wrote:
> Here are a few disadvantages of 464xlat:
>
>   * It consumes lots of state on the NAT64 (one state table entry for
>     every connection). MAP is much better since it uses port ranges.
>   * It doesn't allow any inbound connections unless the NAT
>     cooperates. MAP is better in the sense that you can at least
>     receive connections within your port range.
>   * The transformation is lossy because there are IPv4 header fields
>     that cannot be translated. MAP-E is better because the
>     encapsulation preserves the original packet header.
>
>
> On Wed, Jun 13, 2018 at 6:12 PM Lencse Gábor <lencse@hit.bme.hu 
> <mailto:lencse@hit.bme.hu>> wrote:
>
>     Dear Lorenzo,
>
>     I think it is a rather strong statement that "464XLAT is pretty
>     much the worse of the transition mechanisms from a technical
>     perspective."
>
>     We have listed 26+ IPv6 transition technologies in our workshop
>     paper [1], but there are even more solutions exist.
>
>     Which of them do you mean to be better than 464XLAT?
>
>     What technical points do you consider when stating that 464XLAT is
>     worse than the others? (E.g. resource consumption, scalability,
>     security, ease of implementation, etc.)
>
>     I think it is important for network operators to have a balanced
>     view of the advantages and disadvantages of the different IPv6
>     transition mechanisms, this is why I am asking these questions.
>
>     Best regards,
>
>     Gábor Lencse
>
>
>     [1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition
>     Technologies for Security Analysis", IEICE Communications Society
>     Internet Architecture Workshop, Tokyo, Japan, Aug. 28, 2017,
>     /IEICE Tech. Rep./, vol. 117, no. 187, pp. 19-24. Available
>     online:
>     http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf
>     <http://www.hit.bme.hu/%7Elencse/publications/IEICE-IA-2017-survey.pdf>
>
>
>     6/13/2018 9:38 AM keltezéssel, Lorenzo Colitti írta:
>>     That goes back to my earlier point of that from a technical
>>     perspective 464xlat is pretty much the worst of the transition
>>     mechanisms.. I don't think we should be recommending running it
>>     on wireline at all, let alone prioritizing it over something else
>>     .:-)
>>
>>     On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET MARTINEZ
>>     <jordi.palet=40consulintel.es@dmarc.ietf.org
>>     <mailto:40consulintel.es@dmarc.ietf.org>> wrote:
>>
>>         Lorenzo, you’re missing the key aspect: Being able to
>>         prioritize, when an ISP supports several transition mechanisms.
>>
>>         RFC8026 key aspect is priority. If we don’t add an option
>>         code for 464XLAT, then it can’t be managed the same way.
>>
>>
>>         Regards,
>>
>>         Jordi
>>
>>         *De: *v6ops <v6ops-bounces@ietf.org
>>         <mailto:v6ops-bounces@ietf.org>> en nombre de Lorenzo Colitti
>>         <lorenzo=40google.com@dmarc.ietf.org
>>         <mailto:40google.com@dmarc.ietf.org>>
>>         *Fecha: *miércoles, 13 de junio de 2018, 4:45
>>         *Para: *<jordi.palet=40consulintel.es@dmarc.ietf.org
>>         <mailto:40consulintel.es@dmarc.ietf.org>>
>>         *CC: *"v6ops@ietf.org <mailto:v6ops@ietf.org> WG"
>>         <v6ops@ietf.org <mailto:v6ops@ietf.org>>
>>         *Asunto: *Re: [v6ops] updating RFC8026 to support 464XLAT in
>>         draft-ietf-v6ops-transition-ipv4aas
>>
>>         On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ
>>         <jordi.palet=40consulintel..es@dmarc.ietf.org
>>         <mailto:40consulintel.es@dmarc.ietf.org>> wrote:
>>
>>             You don’t need RFC7050 neither DNS64, you can use PCP
>>             (RFC7225) to tell the CLAT the NAT64 prefix. It also
>>             provides additional advantages to the operator to control
>>             many related aspects (see section 3 of RFC7225).
>>
>>             1.If the operator wants to enable 464xlat: they should
>>             hand out a DNS64 to the CPE.
>>
>>             2.If the operator wants to disable 464xlat: they should
>>             NOT hand out a DNS64 to the CPE.
>>
>>             This doesn’t work, because the operator may be using
>>             RFC7225 instead of RFC7050. You need to try both in that
>>             case, and you aren’t providing a “priority” to a possible
>>             list of mechanisms, which is what RFC8026 does.
>>
>>         But it's the same problem again: what's the use case for this
>>         DHCPv6 option? An operator that's using RFC7225 has an easy
>>         way to tell the CPE not to do 464xlat: don't hand out the
>>         prefix64 to those CPEs. So this is already possible today.
>>
>>             3.If the operator uses 464xlat, they should not allow the
>>             user to change the DNS server.
>>
>>             Let’s be realistic. You can’t “force” the customer to
>>             avoid changing the DNS …
>>
>>         On an operator-managed CPE, you can. On a user-managed CPE,
>>         you can't. But on such a CPE you probably shouldn't be
>>         disabling 464xlat. If the user wants to use it, it's their
>>         CPE, right?
>>
>>         _______________________________________________ v6ops mailing
>>         list v6ops@ietf.org <mailto:v6ops@ietf.org>
>>         https://www.ietf.org/mailman/listinfo/v6ops
>>
>>
>>         **********************************************
>>         IPv4 is over
>>         Are you ready for the new Internet ?
>>         http://www.consulintel.es
>>         The IPv6 Company
>>
>>         This electronic message contains information which may be
>>         privileged or confidential. The information is intended to be
>>         for the exclusive use of the individual(s) named above and
>>         further non-explicilty authorized disclosure, copying,
>>         distribution or use of the contents of this information, even
>>         if partially, including attached files, is strictly
>>         prohibited and will be considered a criminal offense. If you
>>         are not the intended recipient be aware that any disclosure,
>>         copying, distribution or use of the contents of this
>>         information, even if partially, including attached files, is
>>         strictly prohibited, will be considered a criminal offense,
>>         so you must reply to the original sender to inform about this
>>         communication and delete it.
>>
>>
>>
>>     _______________________________________________
>>     v6ops mailing list
>>     v6ops@ietf.org <mailto:v6ops@ietf.org>
>>     https://www.ietf.org/mailman/listinfo/v6ops
>
>     _______________________________________________
>     v6ops mailing list
>     v6ops@ietf.org <mailto:v6ops@ietf.org>
>     https://www.ietf.org/mailman/listinfo/v6ops
>
>
>
> _______________________________________________
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> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <p>So you mean "stateful &lt; stateless"?</p>
    <p>I haven't looked recently at which packet headers get munged in
      what ways. Care to save us all half an hour of examining RFCs and
      tell us which ones?</p>
    <p><br>
    </p>
    <p>Lee<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 06/13/2018 06:55 AM, Lorenzo Colitti
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAKD1Yr3ZbOLbsXFmZqa78ZJ9aaiFnCxAPUVOX26=VoqChA1g-A@mail.gmail.com">
      <div dir="ltr">Here are a few disadvantages of 464xlat:
        <div>
          <ul>
            <li>It consumes lots of state on the NAT64 (one state table
              entry for every connection). MAP is much better since it
              uses port ranges.<br>
            </li>
            <li>It doesn't allow any inbound connections unless the NAT
              cooperates. MAP is better in the sense that you can at
              least receive connections within your port range.</li>
            <li>The transformation is lossy because there are IPv4
              header fields that cannot be translated. MAP-E is better
              because the encapsulation preserves the original packet
              header.</li>
          </ul>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr">On Wed, Jun 13, 2018 at 6:12 PM Lencse Gábor &lt;<a
            href="mailto:lencse@hit.bme.hu" moz-do-not-send="true">lencse@hit.bme.hu</a>&gt;
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0 0 0
          .8ex;border-left:1px #ccc solid;padding-left:1ex">
          <div bgcolor="#FFFFFF" text="#000000"> Dear Lorenzo,<br>
            <br>
            I think it is a rather strong statement that "464XLAT is
            pretty much the worse of the transition mechanisms from a
            technical perspective."<br>
            <br>
            We have listed 26+ IPv6 transition technologies in our
            workshop paper [1], but there are even more solutions exist.
            <br>
            <br>
            Which of them do you mean to be better than 464XLAT?<br>
            <br>
            What technical points do you consider when stating that
            464XLAT is worse than the others? (E.g. resource
            consumption, scalability, security, ease of implementation,
            etc.)<br>
            <br>
            I think it is important for network operators to have a
            balanced view of the advantages and disadvantages of the
            different IPv6 transition mechanisms, this is why I am
            asking these questions.<br>
            <br>
            Best regards,<br>
            <br>
            Gábor Lencse<br>
            <br>
            <br>
            [1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition
            Technologies for Security Analysis", IEICE Communications
            Society Internet Architecture Workshop, Tokyo, Japan, Aug.
            28, 2017, <i>IEICE Tech. Rep.</i>, vol. 117, no. 187, pp.
            19-24. Available online: <a
              class="m_-5273822808446840467moz-txt-link-freetext"
href="http://www.hit.bme.hu/%7Elencse/publications/IEICE-IA-2017-survey.pdf"
              target="_blank" moz-do-not-send="true">http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf</a><br>
            <br>
            <br>
            <div class="m_-5273822808446840467moz-cite-prefix">6/13/2018
              9:38 AM keltezéssel, Lorenzo Colitti írta:<br>
            </div>
            <blockquote type="cite">
              <div dir="ltr">That goes back to my earlier point of that
                from a technical perspective 464xlat is pretty much the
                worst of the transition mechanisms.. I don't think we
                should be recommending running it on wireline at all,
                let alone prioritizing it over something else .:-)</div>
              <br>
              <div class="gmail_quote">
                <div dir="ltr">On Wed, Jun 13, 2018 at 3:50 PM JORDI
                  PALET MARTINEZ &lt;jordi.palet=<a
                    href="mailto:40consulintel.es@dmarc.ietf.org"
                    target="_blank" moz-do-not-send="true">40consulintel.es@dmarc.ietf.org</a>&gt;
                  wrote:<br>
                </div>
                <blockquote class="gmail_quote" style="margin:0 0 0
                  .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  <div link="blue" vlink="purple" lang="ES">
                    <div
                      class="m_-5273822808446840467m_-2528391801406928691WordSection1">
                      <p class="MsoNormal"><span lang="EN-US">Lorenzo,
                          you’re missing the key aspect: Being able to
                          prioritize, when an ISP supports several
                          transition mechanisms.</span></p>
                      <p class="MsoNormal"><span lang="EN-US"> </span></p>
                      <p class="MsoNormal"><span lang="EN-US">RFC8026
                          key aspect is priority. If we don’t add an
                          option code for 464XLAT, then it can’t be
                          managed the same way.</span></p>
                      <div>
                        <p class="MsoNormal"><span
                            style="font-size:10.5pt;color:black"
                            lang="EN-US"><br>
                          </span><span
                            style="font-size:10.5pt;color:black"
                            lang="ES-TRAD">Regards,</span></p>
                        <p class="MsoNormal"
                          style="margin-bottom:12.0pt"><span
                            style="font-size:10.5pt;color:black"
                            lang="ES-TRAD">Jordi</span></p>
                        <p class="MsoNormal"><span
                            style="font-size:10.5pt;color:black"
                            lang="ES-TRAD"> </span></p>
                      </div>
                      <p class="MsoNormal"><span lang="ES-TRAD"> </span></p>
                      <p class="MsoNormal"><span lang="ES-TRAD"> </span></p>
                      <div style="border:none;border-top:solid #b5c4df
                        1.0pt;padding:3.0pt 0cm 0cm 0cm">
                        <p class="MsoNormal" style="margin-left:35.4pt"><b><span
                              style="font-size:12.0pt;color:black">De: </span></b><span
                            style="font-size:12.0pt;color:black">v6ops
                            &lt;<a href="mailto:v6ops-bounces@ietf.org"
                              target="_blank" moz-do-not-send="true">v6ops-bounces@ietf.org</a>&gt;
                            en nombre de Lorenzo Colitti &lt;lorenzo=<a
                              href="mailto:40google.com@dmarc.ietf.org"
                              target="_blank" moz-do-not-send="true">40google.com@dmarc.ietf.org</a>&gt;<br>
                            <b>Fecha: </b>miércoles, 13 de junio de
                            2018, 4:45<br>
                            <b>Para: </b>&lt;jordi.palet=<a
                              href="mailto:40consulintel.es@dmarc.ietf.org"
                              target="_blank" moz-do-not-send="true">40consulintel.es@dmarc.ietf.org</a>&gt;<br>
                            <b>CC: </b>"<a href="mailto:v6ops@ietf.org"
                              target="_blank" moz-do-not-send="true">v6ops@ietf.org</a>
                            WG" &lt;<a href="mailto:v6ops@ietf.org"
                              target="_blank" moz-do-not-send="true">v6ops@ietf.org</a>&gt;<br>
                            <b>Asunto: </b>Re: [v6ops] updating RFC8026
                            to support 464XLAT in
                            draft-ietf-v6ops-transition-ipv4aas</span></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="margin-left:35.4pt"> </p>
                      </div>
                      <div>
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt">On Tue, Jun 12,
                              2018 at 7:40 PM JORDI PALET MARTINEZ
                              &lt;jordi.palet=<a
                                href="mailto:40consulintel.es@dmarc.ietf.org"
                                target="_blank" moz-do-not-send="true">40consulintel..es@dmarc.ietf.org</a>&gt;
                              wrote:</p>
                          </div>
                          <blockquote
                            style="border:none;border-left:solid #cccccc
                            1.0pt;padding:0cm 0cm 0cm
                            6.0pt;margin-left:4.8pt;margin-right:0cm">
                            <div>
                              <div>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt">You don’t
                                  need RFC7050 neither DNS64, you can
                                  use PCP (RFC7225) to tell the CLAT the
                                  NAT64 prefix. It also provides
                                  additional advantages to the operator
                                  to control many related aspects (see
                                  section 3 of RFC7225).</p>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt"><span
                                    lang="EN-US"> </span></p>
                                <p class="MsoNormal"
                                  style="margin-left:106.8pt"><span
                                    lang="EN-US">1.</span><span
                                    lang="EN-US">       </span><span
                                    lang="EN-US">If the operator wants
                                    to enable 464xlat: they should hand
                                    out a DNS64 to the CPE.</span></p>
                                <p class="MsoNormal"
                                  style="margin-left:106.8pt"><span
                                    lang="EN-US">2.</span><span
                                    lang="EN-US">       </span><span
                                    lang="EN-US">If the operator wants
                                    to disable 464xlat: they should NOT
                                    hand out a DNS64 to the CPE.</span></p>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt"><span
                                    lang="EN-US">This doesn’t work,
                                    because the operator may be using
                                    RFC7225 instead of RFC7050. You need
                                    to try both in that case, and you
                                    aren’t providing a “priority” to a
                                    possible list of mechanisms, which
                                    is what RFC8026 does.</span></p>
                              </div>
                            </div>
                          </blockquote>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt"> </p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt">But it's the
                              same problem again: what's the use case
                              for this DHCPv6 option? An operator that's
                              using RFC7225 has an easy way to tell the
                              CPE not to do 464xlat: don't hand out the
                              prefix64 to those CPEs. So this is already
                              possible today.</p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt">  </p>
                          </div>
                          <blockquote
                            style="border:none;border-left:solid #cccccc
                            1.0pt;padding:0cm 0cm 0cm
                            6.0pt;margin-left:4.8pt;margin-right:0cm">
                            <div>
                              <div>
                                <p class="MsoNormal"
                                  style="margin-left:106.8pt"><span
                                    lang="EN-US">3.</span><span
                                    lang="EN-US">       </span><span
                                    lang="EN-US">If the operator uses
                                    464xlat, they should not allow the
                                    user to change the DNS server.</span></p>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt"><span
                                    lang="EN-US"> </span></p>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt"><span
                                    lang="EN-US"> </span></p>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt"><span
                                    lang="EN-US">Let’s be realistic. You
                                    can’t “force” the customer to avoid
                                    changing the DNS …</span></p>
                              </div>
                            </div>
                          </blockquote>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt"> </p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt">On an
                              operator-managed CPE, you can. On a
                              user-managed CPE, you can't. But on such a
                              CPE you probably shouldn't be disabling
                              464xlat. If the user wants to use it, it's
                              their CPE, right?</p>
                          </div>
                        </div>
                      </div>
                      <p class="MsoNormal" style="margin-left:35.4pt">_______________________________________________
                        v6ops mailing list <a
                          href="mailto:v6ops@ietf.org" target="_blank"
                          moz-do-not-send="true">v6ops@ietf.org</a> <a
href="https://www.ietf.org/mailman/listinfo/v6ops" target="_blank"
                          moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/v6ops</a>
                      </p>
                    </div>
                    <br>
                    **********************************************<br>
                    IPv4 is over<br>
                    Are you ready for the new Internet ?<br>
                    <a href="http://www.consulintel.es" target="_blank"
                      moz-do-not-send="true">http://www.consulintel.es</a><br>
                    The IPv6 Company<br>
                    <br>
                    This electronic message contains information which
                    may be privileged or confidential. The information
                    is intended to be for the exclusive use of the
                    individual(s) named above and further non-explicilty
                    authorized disclosure, copying, distribution or use
                    of the contents of this information, even if
                    partially, including attached files, is strictly
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                  </div>
                </blockquote>
              </div>
              <br>
              <fieldset
                class="m_-5273822808446840467mimeAttachmentHeader"></fieldset>
              <br>
              <pre>_______________________________________________
v6ops mailing list
<a class="m_-5273822808446840467moz-txt-link-abbreviated" href="mailto:v6ops@ietf.org" target="_blank" moz-do-not-send="true">v6ops@ietf.org</a>
<a class="m_-5273822808446840467moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/v6ops" target="_blank" moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/v6ops</a>
</pre>
            </blockquote>
            <br>
          </div>
          _______________________________________________<br>
          v6ops mailing list<br>
          <a href="mailto:v6ops@ietf.org" target="_blank"
            moz-do-not-send="true">v6ops@ietf.org</a><br>
          <a href="https://www.ietf.org/mailman/listinfo/v6ops"
            rel="noreferrer" target="_blank" moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/v6ops</a><br>
        </blockquote>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
v6ops mailing list
<a class="moz-txt-link-abbreviated" href="mailto:v6ops@ietf.org">v6ops@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mailman/listinfo/v6ops</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>

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Date: Wed, 13 Jun 2018 14:09:50 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>, <lencse@hit.bme.hu>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Message-ID: <F39A8644-3950-4D01-92A0-A45A327A008B@consulintel.es>
Thread-Topic: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <da095b32-3bb9-d2ec-dd41-e6e526cff83f@hit.bme.hu> <CAKD1Yr3ZbOLbsXFmZqa78ZJ9aaiFnCxAPUVOX26=VoqChA1g-A@mail.gmail.com>
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Subject: Re: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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This always depends on your perspective, network, user requirements, etc. D=
ifferent operators have different requirements.

=20

Here are a few disadvantages of 464xlat:

=C2=B7         It consumes lots of state on the NAT64 (one state table entr=
y for every connection). MAP is much better since it uses port ranges.

Some ISPs care less about state and care more about having a better usage o=
f each IPv4 address and providing as many ports as the users need automatic=
ally.

With NAT64, you have for each user as many ports as they need, nothing =E2=
=80=9Cextra=E2=80=9D to configure for each user. With MAP you pre-define a =
number of ports per user.

=C2=B7         It doesn't allow any inbound connections unless the NAT coop=
erates. MAP is better in the sense that you can at least receive connection=
s within your port range.

Some ISPs don=E2=80=99t want inbound connections to be statically managed b=
y users, they offer different services with different prices, etc. I=E2=80=
=99m not saying I agree with that. Even do, you have ways to cooperate with=
 the NAT64, PCP, etc., to do that. Even for corporate users you can mix tha=
t with SIIT-DC or alike functions.

Inbound connections in your port range is useless for most of the users, or=
 apps or devices, because they don=E2=80=99t allow other ports, and yes, yo=
u can sometimes play tricks with the CPE port forwarding, etc., etc.

=C2=B7         The transformation is lossy because there are IPv4 header fi=
elds that cannot be translated. MAP-E is better because the encapsulation p=
reserves the original packet header.

None of the transition mechanisms can be perfect, except probably dual-stac=
k, but we know we can=E2=80=99t do dual-stack for every possible network, b=
ecause we don=E2=80=99t have sufficient addresses, right?

Now, this has been said many times, and I don=E2=80=99t necessarily agree i=
nitially, but I=E2=80=99ve started to change my mind in the last few years.=
 ***We DON=E2=80=99T WANT a perfect transition mechanism.***

We want some apps to fail, so indirectly it forces to developers and conten=
t providers to move them to IPv6.

So, all them are imperfect in one way or another, but having a single one, =
is much better, from all the perspectives that having many. Developers will=
 fix easier anything for a single mechanism than for many, everything will =
happen faster, and of course, since 464XLAT is the one with has more users =
worldwide, it makes sense to push for that one everywhere, because the prob=
lems that the app developers find in the cellular world, will be sorted out=
, so those apps will be fixed for both, cellular and non-cellular.

Also, an operator with both, cellular and non-cellular networks, is very in=
terested to support a single mechanism instead of two or more. Even an oper=
ator without a cellular network, many times need to provide backup by means=
 of LTE and that means hybrid routers with both wired and LTE interfaces. I=
t is much simpler to have a single mechanism for both, because even the cel=
lular network is not its own network, it can use the same NAT64 (or the sam=
e outsourced one for both kind of connections).

I was not a fan of 464XLAT initially when it was developed, but market make=
 me change my mind.

In summary, it all depends on your perspective, but if our goal is to push =
as much as possible for a higher % of IPv6-only traffic, I=E2=80=99m convin=
ced cellular networks, which are the ones with higher % of penetration and =
growth, clearly defined the path that we must follow.=20

=20

On Wed, Jun 13, 2018 at 6:12 PM Lencse G=C3=A1bor <lencse@hit.bme.hu> wrote=
:

Dear Lorenzo,

I think it is a rather strong statement that "464XLAT is pretty much the wo=
rse of the transition mechanisms from a technical perspective."

We have listed 26+ IPv6 transition technologies in our workshop paper [1], =
but there are even more solutions exist.=20

Which of them do you mean to be better than 464XLAT?

What technical points do you consider when stating that 464XLAT is worse th=
an the others? (E.g. resource consumption, scalability, security, ease of i=
mplementation, etc.)

I think it is important for network operators to have a balanced view of th=
e advantages and disadvantages of the different IPv6 transition mechanisms,=
 this is why I am asking these questions.

Best regards,

G=C3=A1bor Lencse


[1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition Technologies f=
or Security Analysis", IEICE Communications Society Internet Architecture W=
orkshop, Tokyo, Japan, Aug. 28, 2017, IEICE Tech. Rep., vol. 117, no. 187, =
pp. 19-24. Available online: http://www.hit.bme.hu/~lencse/publications/IEI=
CE-IA-2017-survey.pdf

6/13/2018 9:38 AM keltez=C3=A9ssel, Lorenzo Colitti =C3=ADrta:

That goes back to my earlier point of that from a technical perspective 464=
xlat is pretty much the worst of the transition mechanisms.. I don't think =
we should be recommending running it on wireline at all, let alone prioriti=
zing it over something else .:-)

=20

On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET MARTINEZ <jordi.palet=3D40consu=
lintel.es@dmarc.ietf.org> wrote:

Lorenzo, you=E2=80=99re missing the key aspect: Being able to prioritize, w=
hen an ISP supports several transition mechanisms.

=20

RFC8026 key aspect is priority. If we don=E2=80=99t add an option code for =
464XLAT, then it can=E2=80=99t be managed the same way.


Regards,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lorenzo Colitti <lorenzo=3D=
40google.com@dmarc.ietf.org>
Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 4:45
Para: <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

=20

On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ <jordi.palet=3D40consu=
lintel..es@dmarc.ietf.org> wrote:

You don=E2=80=99t need RFC7050 neither DNS64, you can use PCP (RFC7225) to =
tell the CLAT the NAT64 prefix. It also provides additional advantages to t=
he operator to control many related aspects (see section 3 of RFC7225).

=20

1.       If the operator wants to enable 464xlat: they should hand out a DN=
S64 to the CPE.

2.       If the operator wants to disable 464xlat: they should NOT hand out=
 a DNS64 to the CPE.

This doesn=E2=80=99t work, because the operator may be using RFC7225 instea=
d of RFC7050. You need to try both in that case, and you aren=E2=80=99t pro=
viding a =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which=
 is what RFC8026 does.

=20

But it's the same problem again: what's the use case for this DHCPv6 option=
? An operator that's using RFC7225 has an easy way to tell the CPE not to d=
o 464xlat: don't hand out the prefix64 to those CPEs. So this is already po=
ssible today.

 =20

3.       If the operator uses 464xlat, they should not allow the user to ch=
ange the DNS server.

=20

=20

Let=E2=80=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the c=
ustomer to avoid changing the DNS =E2=80=A6

=20

On an operator-managed CPE, you can. On a user-managed CPE, you can't. But =
on such a CPE you probably shouldn't be disabling 464xlat. If the user want=
s to use it, it's their CPE, right?

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20


**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.



_______________________________________________
v6ops mailing list
v6ops@ietf.org
https://www.ietf.org/mailman/listinfo/v6ops
=20

_______________________________________________
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https://www.ietf.org/mailman/listinfo/v6ops

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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DEN-US>This always depends on =
your perspective, network, user requirements, etc. Different operators have=
 different requirements.<o:p></o:p></span></p><p class=3DMsoNormal><span la=
ng=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal style=3D'margin=
-left:35.4pt'><span lang=3DEN-US>Here are a few disadvantages of 464xlat:<o=
:p></o:p></span></p><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:a=
uto;mso-margin-bottom-alt:auto;margin-left:71.4pt;text-indent:-18.0pt;mso-l=
ist:l0 level1 lfo1'><![if !supportLists]><span style=3D'font-size:10.0pt;fo=
nt-family:Symbol'><span style=3D'mso-list:Ignore'>=C2=B7<span style=3D'font=
:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span></span><![endif]>It consumes lots of state on the NAT64 (one =
state table entry for every connection). MAP is much better since it uses p=
ort ranges.<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:=
auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US>Some ISPs care less abo=
ut state and care more about having a better usage of each IPv4 address and=
 providing as many ports as the users need automatically.<o:p></o:p></span>=
</p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom=
-alt:auto'><span lang=3DEN-US>With NAT64, you have for each user as many po=
rts as they need, nothing =E2=80=9Cextra=E2=80=9D to configure for each use=
r. With MAP you pre-define a number of ports per user.<o:p></o:p></span></p=
><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-al=
t:auto;margin-left:71.4pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![i=
f !supportLists]><span style=3D'font-size:10.0pt;font-family:Symbol'><span =
style=3D'mso-list:Ignore'>=C2=B7<span style=3D'font:7.0pt "Times New Roman"=
'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><![=
endif]><span lang=3DEN-US>It doesn't allow any inbound connections unless t=
he NAT cooperates. </span>MAP is better in the sense that you can at least =
receive connections within your port range.<o:p></o:p></p><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=
=3DEN-US>Some ISPs don=E2=80=99t want inbound connections to be statically =
managed by users, they offer different services with different prices, etc.=
 I=E2=80=99m not saying I agree with that. Even do, you have ways to cooper=
ate with the NAT64, PCP, etc., to do that. Even for corporate users you can=
 mix that with SIIT-DC or alike functions.<o:p></o:p></span></p><p class=3D=
MsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><spa=
n lang=3DEN-US>Inbound connections in your port range is useless for most o=
f the users, or apps or devices, because they don=E2=80=99t allow other por=
ts, and yes, you can sometimes play tricks with the CPE port forwarding, et=
c., etc.<o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-=
alt:auto;mso-margin-bottom-alt:auto;margin-left:71.4pt;text-indent:-18.0pt;=
mso-list:l0 level1 lfo1'><![if !supportLists]><span style=3D'font-size:10.0=
pt;font-family:Symbol'><span style=3D'mso-list:Ignore'>=C2=B7<span style=3D=
'font:7.0pt "Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp; </span></span></span><![endif]><span lang=3DEN-US>The transformation i=
s lossy because there are IPv4 header fields that cannot be translated. </s=
pan>MAP-E is better because the encapsulation preserves the original packet=
 header.<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:aut=
o;mso-margin-bottom-alt:auto'><span lang=3DEN-US>None of the transition mec=
hanisms can be perfect, except probably dual-stack, but we know we can=E2=
=80=99t do dual-stack for every possible network, because we don=E2=80=99t =
have sufficient addresses, right?<o:p></o:p></span></p><p class=3DMsoNormal=
 style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=3D=
EN-US>Now, this has been said many times, and I don=E2=80=99t necessarily a=
gree initially, but I=E2=80=99ve started to change my mind in the last few =
years. ***We DON=E2=80=99T WANT a perfect transition mechanism.***<o:p></o:=
p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US>We want some apps to f=
ail, so indirectly it forces to developers and content providers to move th=
em to IPv6.<o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-t=
op-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US>So, all them are=
 imperfect in one way or another, but having a single one, is much better, =
from all the perspectives that having many. Developers will fix easier anyt=
hing for a single mechanism than for many, everything will happen faster, a=
nd of course, since 464XLAT is the one with has more users worldwide, it ma=
kes sense to push for that one everywhere, because the problems that the ap=
p developers find in the cellular world, will be sorted out, so those apps =
will be fixed for both, cellular and non-cellular.<o:p></o:p></span></p><p =
class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:au=
to'><span lang=3DEN-US>Also, an operator with both, cellular and non-cellul=
ar networks, is very interested to support a single mechanism instead of tw=
o or more. Even an operator without a cellular network, many times need to =
provide backup by means of LTE and that means hybrid routers with both wire=
d and LTE interfaces. It is much simpler to have a single mechanism for bot=
h, because even the cellular network is not its own network, it can use the=
 same NAT64 (or the same outsourced one for both kind of connections).<o:p>=
</o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-=
margin-bottom-alt:auto'><span lang=3DEN-US>I was not a fan of 464XLAT initi=
ally when it was developed, but market make me change my mind.<o:p></o:p></=
span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-b=
ottom-alt:auto'><span lang=3DEN-US>In summary, it all depends on your persp=
ective, but if our goal is to push as much as possible for a higher % of IP=
v6-only traffic, I=E2=80=99m convinced cellular networks, which are the one=
s with higher % of penetration and growth, clearly defined the path that we=
 must follow. <o:p></o:p></span></p></div><p class=3DMsoNormal style=3D'mar=
gin-left:35.4pt'><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div><div><=
p class=3DMsoNormal style=3D'margin-left:35.4pt'>On Wed, Jun 13, 2018 at 6:=
12 PM Lencse G=C3=A1bor &lt;<a href=3D"mailto:lencse@hit.bme.hu">lencse@hit=
.bme.hu</a>&gt; wrote:<o:p></o:p></p></div><blockquote style=3D'border:none=
;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8p=
t;margin-right:0cm'><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:0=
cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt'>Dear Lorenzo,<=
br><br>I think it is a rather strong statement that &quot;464XLAT is pretty=
 much the worse of the transition mechanisms from a technical perspective.&=
quot;<br><br>We have listed 26+ IPv6 transition technologies in our worksho=
p paper [1], but there are even more solutions exist. <br><br>Which of them=
 do you mean to be better than 464XLAT?<br><br>What technical points do you=
 consider when stating that 464XLAT is worse than the others? (E.g. resourc=
e consumption, scalability, security, ease of implementation, etc.)<br><br>=
I think it is important for network operators to have a balanced view of th=
e advantages and disadvantages of the different IPv6 transition mechanisms,=
 this is why I am asking these questions.<br><br>Best regards,<br><br>G=C3=
=A1bor Lencse<br><br><br>[1] G. Lencse and Y. Kadobayashi, &quot;Survey of =
IPv6 Transition Technologies for Security Analysis&quot;, IEICE Communicati=
ons Society Internet Architecture Workshop, Tokyo, Japan, Aug. 28, 2017, <i=
>IEICE Tech. Rep.</i>, vol. 117, no. 187, pp. 19-24. Available online: <a h=
ref=3D"http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf"=
 target=3D"_blank">http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017=
-survey.pdf</a><br><br><o:p></o:p></p><div><p class=3DMsoNormal style=3D'ma=
rgin-left:35.4pt'>6/13/2018 9:38 AM keltez=C3=A9ssel, Lorenzo Colitti =C3=
=ADrta:<o:p></o:p></p></div><blockquote style=3D'margin-top:5.0pt;margin-bo=
ttom:5.0pt'><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>That goe=
s back to my earlier point of that from a technical perspective 464xlat is pretty much the worst of the transition mechanism=
s.. I don't think we should be recommending running it on wireline at all, =
let alone prioritizing it over something else .:-)<o:p></o:p></p></div><p c=
lass=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p><div><di=
v><p class=3DMsoNormal style=3D'margin-left:35.4pt'>On Wed, Jun 13, 2018 at=
 3:50 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:40consuli=
ntel.es@dmarc.ietf.org" target=3D"_blank">40consulintel.es@dmarc.ietf.org</=
a>&gt; wrote:<o:p></o:p></p></div><blockquote style=3D'border:none;border-l=
eft:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-=
right:0cm'><div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;=
mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>Lorenzo, =
you=E2=80=99re missing the key aspect: Being able to prioritize, when an IS=
P supports several transition mechanisms.</span><o:p></o:p></p><p class=3DM=
soNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin=
-left:35.4pt'><span lang=3DEN-US>&nbsp;</span><o:p></o:p></p><p class=3DMso=
Normal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-l=
eft:35.4pt'><span lang=3DEN-US>RFC8026 key aspect is priority. If we don=E2=
=80=99t add an option code for 464XLAT, then it can=E2=80=99t be managed th=
e same way.</span><o:p></o:p></p><div><p class=3DMsoNormal style=3D'mso-mar=
gin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=
=3DEN-US style=3D'font-size:10.5pt;color:black'><br></span><span lang=3DES-=
TRAD style=3D'font-size:10.5pt;color:black'>Regards,</span><o:p></o:p></p><=
p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;margin-bottom:12.0pt;m=
argin-left:35.4pt'><span lang=3DES-TRAD style=3D'font-size:10.5pt;color:bla=
ck'>Jordi</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top=
-alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DES-TR=
AD style=3D'font-size:10.5pt;color:black'>&nbsp;</span><o:p></o:p></p></div=
><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-al=
t:auto;margin-left:35.4pt'><span lang=3DES-TRAD>&nbsp;</span><o:p></o:p></p=
><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-al=
t:auto;margin-left:35.4pt'><span lang=3DES-TRAD>&nbsp;</span><o:p></o:p></p=
><div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm=
 0cm 0cm'><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-=
bottom-alt:auto;margin-left:70.8pt'><b><span style=3D'font-size:12.0pt;colo=
r:black'>De: </span></b><span style=3D'font-size:12.0pt;color:black'>v6ops =
&lt;<a href=3D"mailto:v6ops-bounces@ietf.org" target=3D"_blank">v6ops-bounc=
es@ietf.org</a>&gt; en nombre de Lorenzo Colitti &lt;lorenzo=3D<a href=3D"m=
ailto:40google.com@dmarc.ietf.org" target=3D"_blank">40google.com@dmarc.iet=
f.org</a>&gt;<br><b>Fecha: </b>mi=C3=A9rcoles, 13 de junio de 2018, 4:45<br=
><b>Para: </b>&lt;jordi.palet=3D<a href=3D"mailto:40consulintel.es@dmarc.ie=
tf.org" target=3D"_blank">40consulintel.es@dmarc.ietf.org</a>&gt;<br><b>CC:=
 </b>&quot;<a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6ops@ietf.o=
rg</a> WG&quot; &lt;<a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6o=
ps@ietf.org</a>&gt;<br><b>Asunto: </b>Re: [v6ops] updating RFC8026 to suppo=
rt 464XLAT in draft-ietf-v6ops-transition-ipv4aas</span><o:p></o:p></p></di=
v><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bot=
tom-alt:auto;margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div><div><div><div>=
<p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt=
:auto;margin-left:70.8pt'>On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTI=
NEZ &lt;jordi.palet=3D<a href=3D"mailto:40consulintel.es@dmarc.ietf.org" ta=
rget=3D"_blank">40consulintel..es@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p><=
/p></div><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;p=
adding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0c=
m;margin-bottom:5.0pt'><div><div><p class=3DMsoNormal style=3D'mso-margin-t=
op-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'>You don=E2=80=99=
t need RFC7050 neither DNS64, you can use PCP (RFC7225) to tell the CLAT th=
e NAT64 prefix. It also provides additional advantages to the operator to control many related aspects (see section 3 of RF=
C7225).<o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto=
;mso-margin-bottom-alt:auto;margin-left:70.8pt'><span lang=3DEN-US>&nbsp;</=
span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;m=
so-margin-bottom-alt:auto;margin-left:142.2pt'><span lang=3DEN-US>1.&nbsp;&=
nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If the operator wants to enable 464xlat: they=
 should hand out a DNS64 to the CPE.</span><o:p></o:p></p><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left=
:142.2pt'><span lang=3DEN-US>2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If the =
operator wants to disable&nbsp;464xlat: they should NOT hand out a DNS64 to=
 the CPE.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top=
-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'><span lang=3DEN-US=
>This doesn=E2=80=99t work, because the operator may be using RFC7225 inste=
ad of RFC7050. You need to try both in that case, and you aren=E2=80=99t pr=
oviding a =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, whic=
h is what RFC8026 does.</span><o:p></o:p></p></div></div></blockquote><div>=
<p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt=
:auto;margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div><div><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left=
:70.8pt'>But it's the same problem again: what's the use case for this DHCP=
v6 option? An operator that's using RFC7225 has an easy way to tell the CPE=
 not to do 464xlat: don't hand out the prefix64 to those CPEs. So this is a=
lready possible today.<o:p></o:p></p></div><div><p class=3DMsoNormal style=
=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'>=
&nbsp;&nbsp;<o:p></o:p></p></div><blockquote style=3D'border:none;border-le=
ft:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-t=
op:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><div><div><p class=3DMsoNorm=
al style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:=
142.2pt'><span lang=3DEN-US>3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If the o=
perator uses 464xlat, they should not allow the user to change the DNS serv=
er.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:a=
uto;mso-margin-bottom-alt:auto;margin-left:70.8pt'><span lang=3DEN-US>&nbsp=
;</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:aut=
o;mso-margin-bottom-alt:auto;margin-left:70.8pt'><span lang=3DEN-US>&nbsp;<=
/span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;=
mso-margin-bottom-alt:auto;margin-left:70.8pt'><span lang=3DEN-US>Let=E2=80=
=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the customer t=
o avoid changing the DNS =E2=80=A6</span><o:p></o:p></p></div></div></block=
quote><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin=
-bottom-alt:auto;margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div><div><p cla=
ss=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;=
margin-left:70.8pt'>On an operator-managed CPE, you can. On a user-managed =
CPE, you can't. But on such a CPE you probably shouldn't be disabling 464xl=
at. If the user wants to use it, it's their CPE, right?<o:p></o:p></p></div=
></div></div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-marg=
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*******************************<br>IPv4 is over<br>Are you ready for the ne=
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______________________________________________<o:p></o:p></pre><pre style=
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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>, <lencse@hit.bme.hu>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
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Thread-Topic: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <da095b32-3bb9-d2ec-dd41-e6e526cff83f@hit.bme.hu>
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Subject: Re: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Resending as my email client formatted it weirdly =E2=80=A6 and adding one =
more comment.

=20

This always depends on your perspective, network, user requirements, etc. D=
ifferent operators have different requirements.

=20

Here are a few disadvantages of 464xlat:

=C2=B7         It consumes lots of state on the NAT64 (one state table entr=
y for every connection). MAP is much better since it uses port ranges.

=20

Some ISPs care less about state and care more about having a better usage o=
f each IPv4 address and providing as many ports as the users need automatic=
ally.

=20

With NAT64, you have for each user as many ports as they need, nothing =E2=
=80=9Cextra=E2=80=9D to configure for each user. With MAP you pre-define a =
number of ports per user.

=20

Consequently, with NAT64 you make a much better usage of every single IPv4 =
address, because they become shared based dynamically on =E2=80=9Creal-flow=
-per-port=E2=80=9D needs at each given time.

=20

=20

=C2=B7         It doesn't allow any inbound connections unless the NAT coop=
erates. MAP is better in the sense that you can at least receive connection=
s within your port range.

=20

Some ISPs don=E2=80=99t want inbound connections to be statically managed b=
y users, they offer different services with different prices, etc. I=E2=80=
=99m not saying I agree with that. Even do, you have ways to cooperate with=
 the NAT64, PCP, etc., to do that. Even for corporate users you can mix tha=
t with SIIT-DC or alike functions.

=20

Inbound connections in your port range is useless for most of the users, or=
 apps or devices, because they don=E2=80=99t allow other ports, and yes, yo=
u can sometimes play tricks with the CPE port forwarding, etc., etc.

=C2=B7         The transformation is lossy because there are IPv4 header fi=
elds that cannot be translated. MAP-E is better because the encapsulation p=
reserves the original packet header.

=20

None of the transition mechanisms can be perfect, except probably dual-stac=
k, but we know we can=E2=80=99t do dual-stack for every possible network, b=
ecause we don=E2=80=99t have sufficient addresses, right?

=20

Now, this has been said many times, and I don=E2=80=99t necessarily agree i=
nitially, but I=E2=80=99ve started to change my mind in the last few years.=
 ***We DON=E2=80=99T WANT a perfect transition mechanism.***

=20

We want some apps to fail, so indirectly it forces to developers and conten=
t providers to move them to IPv6.

=20

So, all them are imperfect in one way or another, but having a single one, =
is much better, cheaper and easier, from all the perspectives that having m=
any. Developers will fix easier anything for a single mechanism than for ma=
ny, everything will happen faster, and of course, since 464XLAT is the one =
with has more users worldwide, it makes sense to push for that one everywhe=
re, because the problems that the app developers find in the cellular world=
, will be sorted out, so those apps will be fixed for both, cellular and no=
n-cellular.

=20

Also, an operator with both, cellular and non-cellular networks, is very in=
terested to support a single mechanism instead of two or more. Even an oper=
ator without a cellular network, many times need to provide backup by means=
 of LTE and that means hybrid routers with both wired and LTE interfaces. I=
t is much simpler to have a single mechanism for both, because even the cel=
lular network is not its own network, it can use the same NAT64 (or the sam=
e outsourced one for both kind of connections).

=20

I was not a fan of 464XLAT initially when it was developed, but market make=
 me change my mind.

=20

In summary, it all depends on your perspective, but if our goal is to push =
as much as possible for a higher % of IPv6-only traffic, I=E2=80=99m convin=
ced cellular networks, which are the ones with higher % of penetration and =
growth, clearly defined the path that we must follow.=20

=20

=20

On Wed, Jun 13, 2018 at 6:12 PM Lencse G=C3=A1bor <lencse@hit.bme.hu> wrote=
:

Dear Lorenzo,

I think it is a rather strong statement that "464XLAT is pretty much the wo=
rse of the transition mechanisms from a technical perspective."

We have listed 26+ IPv6 transition technologies in our workshop paper [1], =
but there are even more solutions exist.=20

Which of them do you mean to be better than 464XLAT?

What technical points do you consider when stating that 464XLAT is worse th=
an the others? (E.g. resource consumption, scalability, security, ease of i=
mplementation, etc.)

I think it is important for network operators to have a balanced view of th=
e advantages and disadvantages of the different IPv6 transition mechanisms,=
 this is why I am asking these questions.

Best regards,

G=C3=A1bor Lencse


[1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition Technologies f=
or Security Analysis", IEICE Communications Society Internet Architecture W=
orkshop, Tokyo, Japan, Aug. 28, 2017, IEICE Tech. Rep., vol. 117, no. 187, =
pp. 19-24. Available online: http://www.hit.bme.hu/~lencse/publications/IEI=
CE-IA-2017-survey.pdf

6/13/2018 9:38 AM keltez=C3=A9ssel, Lorenzo Colitti =C3=ADrta:

That goes back to my earlier point of that from a technical perspective 464=
xlat is pretty much the worst of the transition mechanisms.. I don't think =
we should be recommending running it on wireline at all, let alone prioriti=
zing it over something else .:-)

=20

On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET MARTINEZ <jordi.palet=3D40consu=
lintel.es@dmarc.ietf.org> wrote:

Lorenzo, you=E2=80=99re missing the key aspect: Being able to prioritize, w=
hen an ISP supports several transition mechanisms.

=20

RFC8026 key aspect is priority. If we don=E2=80=99t add an option code for =
464XLAT, then it can=E2=80=99t be managed the same way.


Regards,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lorenzo Colitti <lorenzo=3D=
40google.com@dmarc.ietf.org>
Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 4:45
Para: <jordi.palet=3D40consulintel.es@dmarc.ietf.org>
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas

=20

On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ <jordi.palet=3D40consu=
lintel..es@dmarc.ietf.org> wrote:

You don=E2=80=99t need RFC7050 neither DNS64, you can use PCP (RFC7225) to =
tell the CLAT the NAT64 prefix. It also provides additional advantages to t=
he operator to control many related aspects (see section 3 of RFC7225).

=20

1.       If the operator wants to enable 464xlat: they should hand out a DN=
S64 to the CPE.

2.       If the operator wants to disable 464xlat: they should NOT hand out=
 a DNS64 to the CPE.

This doesn=E2=80=99t work, because the operator may be using RFC7225 instea=
d of RFC7050. You need to try both in that case, and you aren=E2=80=99t pro=
viding a =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which=
 is what RFC8026 does.

=20

But it's the same problem again: what's the use case for this DHCPv6 option=
? An operator that's using RFC7225 has an easy way to tell the CPE not to d=
o 464xlat: don't hand out the prefix64 to those CPEs. So this is already po=
ssible today.

 =20

3.       If the operator uses 464xlat, they should not allow the user to ch=
ange the DNS server.

=20

=20

Let=E2=80=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the c=
ustomer to avoid changing the DNS =E2=80=A6

=20

On an operator-managed CPE, you can. On a user-managed CPE, you can't. But =
on such a CPE you probably shouldn't be disabling 464xlat. If the user want=
s to use it, it's their CPE, right?

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20


**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.

=20
_______________________________________________
v6ops mailing list
v6ops@ietf.org
https://www.ietf.org/mailman/listinfo/v6ops
=20

_______________________________________________
v6ops mailing list
v6ops@ietf.org
https://www.ietf.org/mailman/listinfo/v6ops

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
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The IPv6 Company

This electronic message contains information which may be privileged or con=
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ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DEN-US>Resending as my email c=
lient formatted it weirdly =E2=80=A6 and adding one more comment.<o:p></o:p=
></span></p><p class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span=
></p><p class=3DMsoNormal><span lang=3DEN-US>This always depends on your pe=
rspective, network, user requirements, etc. Different operators have differ=
ent requirements.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN=
-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal style=3D'margin-left:3=
5.4pt'><span lang=3DEN-US>Here are a few disadvantages of 464xlat:<o:p></o:=
p></span></p><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso=
-margin-bottom-alt:auto;margin-left:71.4pt;text-indent:-18.0pt;mso-list:l0 =
level1 lfo2'><![if !supportLists]><span style=3D'font-size:10.0pt;font-fami=
ly:Symbol'><span style=3D'mso-list:Ignore'>=C2=B7<span style=3D'font:7.0pt =
"Times New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>=
</span></span><![endif]><span lang=3DEN-US>It consumes lots of state on the=
 NAT64 (one state table entry for every connection). </span>MAP is much bet=
ter since it uses port ranges.</p><p class=3DMsoNormal style=3D'mso-margin-=
top-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US><o:p>&nbsp;</o:=
p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-marg=
in-bottom-alt:auto'><span lang=3DEN-US>Some ISPs care less about state and =
care more about having a better usage of each IPv4 address and providing as=
 many ports as the users need automatically.<o:p></o:p></span></p><p class=
=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><=
span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal style=3D=
'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US>Wit=
h NAT64, you have for each user as many ports as they need, nothing =E2=80=
=9Cextra=E2=80=9D to configure for each user. With MAP you pre-define a num=
ber of ports per user.<o:p></o:p></span></p><p class=3DMsoNormal style=3D'm=
so-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US><o:p>=
&nbsp;</o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:aut=
o;mso-margin-bottom-alt:auto'><span lang=3DEN-US>Consequently, with NAT64 y=
ou make a much better usage of every single IPv4 address, because they beco=
me shared based dynamically on =E2=80=9Creal-flow-per-port=E2=80=9D needs a=
t each given time.<o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-m=
argin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US><o:p>&nbs=
p;</o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;ms=
o-margin-bottom-alt:auto'><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p=
 class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:a=
uto;margin-left:71.4pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !=
supportLists]><span lang=3DEN-US style=3D'font-size:10.0pt;font-family:Symb=
ol'><span style=3D'mso-list:Ignore'>=C2=B7<span style=3D'font:7.0pt "Times =
New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span>=
</span><![endif]><span lang=3DEN-US>It doesn't allow any inbound connection=
s unless the NAT cooperates. MAP is better in the sense that you can at lea=
st receive connections within your port range.<o:p></o:p></span></p><p clas=
s=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>=
<span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal style=
=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US>=
Some ISPs don=E2=80=99t want inbound connections to be statically managed b=
y users, they offer different services with different prices, etc. I=E2=80=
=99m not saying I agree with that. Even do, you have ways to cooperate with=
 the NAT64, PCP, etc., to do that. Even for corporate users you can mix tha=
t with SIIT-DC or alike functions.<o:p></o:p></span></p><p class=3DMsoNorma=
l style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=
=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal style=3D'mso-marg=
in-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US>Inbound conn=
ections in your port range is useless for most of the users, or apps or dev=
ices, because they don=E2=80=99t allow other ports, and yes, you can sometim=
es play tricks with the CPE port forwarding, etc., etc.<o:p></o:p></span></=
p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:71.4pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![=
if !supportLists]><span lang=3DEN-US style=3D'font-size:10.0pt;font-family:=
Symbol'><span style=3D'mso-list:Ignore'>=C2=B7<span style=3D'font:7.0pt "Ti=
mes New Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></s=
pan></span><![endif]><span lang=3DEN-US>The transformation is lossy because=
 there are IPv4 header fields that cannot be translated. MAP-E is better be=
cause the encapsulation preserves the original packet header.<o:p></o:p></s=
pan></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bo=
ttom-alt:auto'><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMs=
oNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US>None of the transition mechanisms can be perfect, except proba=
bly dual-stack, but we know we can=E2=80=99t do dual-stack for every possib=
le network, because we don=E2=80=99t have sufficient addresses, right?<o:p>=
</o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-=
margin-bottom-alt:auto'><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p c=
lass=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:aut=
o'><span lang=3DEN-US>Now, this has been said many times, and I don=E2=80=
=99t necessarily agree initially, but I=E2=80=99ve started to change my min=
d in the last few years. ***We DON=E2=80=99T WANT a perfect transition mech=
anism.***<o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top=
-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US><o:p>&nbsp;</o:p><=
/span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-=
bottom-alt:auto'><span lang=3DEN-US>We want some apps to fail, so indirectl=
y it forces to developers and content providers to move them to IPv6.<o:p><=
/o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto'><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p cl=
ass=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto=
'><span lang=3DEN-US>So, all them are imperfect in one way or another, but =
having a single one, is much better, cheaper and easier, from all the persp=
ectives that having many. Developers will fix easier anything for a single =
mechanism than for many, everything will happen faster, and of course, sinc=
e 464XLAT is the one with has more users worldwide, it makes sense to push =
for that one everywhere, because the problems that the app developers find =
in the cellular world, will be sorted out, so those apps will be fixed for =
both, cellular and non-cellular.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DE=
N-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-t=
op-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US>Also, an operato=
r with both, cellular and non-cellular networks, is very interested to supp=
ort a single mechanism instead of two or more. Even an operator without a c=
ellular network, many times need to provide backup by means of LTE and that=
 means hybrid routers with both wired and LTE interfaces. It is much simple=
r to have a single mechanism for both, because even the cellular network is=
 not its own network, it can use the same NAT64 (or the same outsourced one=
 for both kind of connections).<o:p></o:p></span></p><p class=3DMsoNormal s=
tyle=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN=
-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-to=
p-alt:auto;mso-margin-bottom-alt:auto'><span lang=3DEN-US>I was not a fan o=
f 464XLAT initially when it was developed, but market make me change my min=
d.<o:p></o:p></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:au=
to;mso-margin-bottom-alt:auto'><span lang=3DEN-US><o:p>&nbsp;</o:p></span><=
/p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-=
alt:auto'><span lang=3DEN-US>In summary, it all depends on your perspective=
, but if our goal is to push as much as possible for a higher % of IPv6-only traffic, I=E2=80=99m convince=
d cellular networks, which are the ones with higher % of penetration and gr=
owth, clearly defined the path that we must follow. <o:p></o:p></span></p><=
/div><p class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p=
 class=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3DEN-US><o:p>&nb=
sp;</o:p></span></p><div><div><p class=3DMsoNormal style=3D'margin-left:35.=
4pt'><span lang=3DEN-US>On Wed, Jun 13, 2018 at 6:12 PM Lencse G=C3=A1bor &=
lt;</span><a href=3D"mailto:lencse@hit.bme.hu"><span lang=3DEN-US>lencse@hi=
t.bme.hu</span></a><span lang=3DEN-US>&gt; wrote:<o:p></o:p></span></p></di=
v><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:=
0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margi=
n-bottom:5.0pt'><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:0cm;m=
argin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt'><span lang=3DEN-US=
>Dear Lorenzo,<br><br>I think it is a rather strong statement that &quot;46=
4XLAT is pretty much the worse of the transition mechanisms from a technica=
l perspective.&quot;<br><br>We have listed 26+ IPv6 transition technologies=
 in our workshop paper [1], but there are even more solutions exist. <br><b=
r>Which of them do you mean to be better than 464XLAT?<br><br>What technica=
l points do you consider when stating that 464XLAT is worse than the others=
? (E.g. resource consumption, scalability, security, ease of implementation=
, etc.)<br><br>I think it is important for network operators to have a bala=
nced view of the advantages and disadvantages of the different IPv6 transit=
ion mechanisms, this is why I am asking these questions.<br><br>Best regard=
s,<br><br>G=C3=A1bor Lencse<br><br><br>[1] G. Lencse and Y. Kadobayashi, &q=
uot;Survey of IPv6 Transition Technologies for Security Analysis&quot;, IEI=
CE Communications Society Internet Architecture Workshop, Tokyo, Japan, Aug=
. 28, 2017, <i>IEICE Tech. Rep.</i>, vol. 117, no. 187, pp. 19-24. Availabl=
e online: </span><a href=3D"http://www.hit.bme.hu/~lencse/publications/IEIC=
E-IA-2017-survey.pdf" target=3D"_blank"><span lang=3DEN-US>http://www.hit.b=
me.hu/~lencse/publications/IEICE-IA-2017-survey.pdf</span></a><span lang=3D=
EN-US><o:p></o:p></span></p><div><p class=3DMsoNormal style=3D'margin-left:=
35.4pt'><span lang=3DEN-US>6/13/2018 9:38 AM keltez=C3=A9ssel, Lorenzo Coli=
tti =C3=ADrta:<o:p></o:p></span></p></div><blockquote style=3D'margin-top:5=
.0pt;margin-bottom:5.0pt'><div><p class=3DMsoNormal style=3D'margin-left:35=
.4pt'><span lang=3DEN-US>That goes back to my earlier point of that from a =
technical perspective 464xlat is pretty much the worst of the transition me=
chanisms.. I don't think we should be recommending running it on wireline a=
t all, let alone prioritizing it over something else .:-)<o:p></o:p></span>=
</p></div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3DEN=
-US><o:p>&nbsp;</o:p></span></p><div><div><p class=3DMsoNormal style=3D'mar=
gin-left:35.4pt'><span lang=3DEN-US>On Wed, Jun 13, 2018 at 3:50 PM JORDI P=
ALET MARTINEZ &lt;jordi.palet=3D</span><a href=3D"mailto:40consulintel.es@d=
marc.ietf.org" target=3D"_blank"><span lang=3DEN-US>40consulintel.es@dmarc.=
ietf.org</span></a><span lang=3DEN-US>&gt; wrote:<o:p></o:p></span></p></di=
v><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:=
0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margi=
n-bottom:5.0pt'><div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:=
auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>Lore=
nzo, you=E2=80=99re missing the key aspect: Being able to prioritize, when =
an ISP supports several transition mechanisms.<o:p></o:p></span></p><p clas=
s=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;m=
argin-left:35.4pt'><span lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p class=
=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;ma=
rgin-left:35.4pt'><span lang=3DEN-US>RFC8026 key aspect is priority. If we =
don=E2=80=99t add an option code for 464XLAT, then it can=E2=80=99t be mana=
ged the same way.<o:p></o:p></span></p><div><p class=3DMsoNormal style=3D'm=
so-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US style=3D'font-si=
ze:10.5pt;color:black'><br>Regards,</span><span lang=3DEN-US><o:p></o:p></s=
pan></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;margin-bottom=
:12.0pt;margin-left:35.4pt'><span lang=3DEN-US style=3D'font-size:10.5pt;co=
lor:black'>Jordi</span><span lang=3DEN-US><o:p></o:p></span></p><p class=3D=
MsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margi=
n-left:35.4pt'><span lang=3DEN-US style=3D'font-size:10.5pt;color:black'>&n=
bsp;</span><span lang=3DEN-US><o:p></o:p></span></p></div><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left=
:35.4pt'><span lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p class=3DMsoNorma=
l style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DEN-US>&nbsp;<o:p></o:p></span></p><div style=3D'border:=
none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DM=
soNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin=
-left:70.8pt'><b><span lang=3DEN-US style=3D'font-size:12.0pt;color:black'>=
De: </span></b><span lang=3DEN-US style=3D'font-size:12.0pt;color:black'>v6=
ops &lt;</span><span style=3D'font-size:12.0pt;color:black'><a href=3D"mail=
to:v6ops-bounces@ietf.org" target=3D"_blank"><span lang=3DEN-US>v6ops-bounc=
es@ietf.org</span></a></span><span lang=3DEN-US style=3D'font-size:12.0pt;c=
olor:black'>&gt; en nombre de Lorenzo Colitti &lt;lorenzo=3D</span><span st=
yle=3D'font-size:12.0pt;color:black'><a href=3D"mailto:40google.com@dmarc.i=
etf.org" target=3D"_blank"><span lang=3DEN-US>40google.com@dmarc.ietf.org</=
span></a></span><span lang=3DEN-US style=3D'font-size:12.0pt;color:black'>&=
gt;<br><b>Fecha: </b>mi=C3=A9rcoles, 13 de junio de 2018, 4:45<br><b>Para: =
</b>&lt;jordi.palet=3D</span><span style=3D'font-size:12.0pt;color:black'><=
a href=3D"mailto:40consulintel.es@dmarc.ietf.org" target=3D"_blank"><span l=
ang=3DEN-US>40consulintel.es@dmarc.ietf.org</span></a></span><span lang=3DE=
N-US style=3D'font-size:12.0pt;color:black'>&gt;<br><b>CC: </b>&quot;</span=
><span style=3D'font-size:12.0pt;color:black'><a href=3D"mailto:v6ops@ietf.=
org" target=3D"_blank"><span lang=3DEN-US>v6ops@ietf.org</span></a></span><=
span lang=3DEN-US style=3D'font-size:12.0pt;color:black'> WG&quot; &lt;</sp=
an><span style=3D'font-size:12.0pt;color:black'><a href=3D"mailto:v6ops@iet=
f.org" target=3D"_blank"><span lang=3DEN-US>v6ops@ietf.org</span></a></span=
><span lang=3DEN-US style=3D'font-size:12.0pt;color:black'>&gt;<br><b>Asunt=
o: </b>Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops-=
transition-ipv4aas</span><span lang=3DEN-US><o:p></o:p></span></p></div><di=
v><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;margin-left:70.8pt'><span lang=3DEN-US>&nbsp;<o:p></o:p></span></p>=
</div><div><div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;=
mso-margin-bottom-alt:auto;margin-left:70.8pt'><span lang=3DEN-US>On Tue, J=
un 12, 2018 at 7:40 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D</span><a hre=
f=3D"mailto:40consulintel.es@dmarc.ietf.org" target=3D"_blank"><span lang=
=3DEN-US>40consulintel..es@dmarc.ietf.org</span></a><span lang=3DEN-US>&gt;=
 wrote:<o:p></o:p></span></p></div><blockquote style=3D'border:none;border-=
left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin=
-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><div><div><p class=3DMsoNo=
rmal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-lef=
t:70.8pt'><span lang=3DEN-US>You don=E2=80=99t need RFC7050 neither DNS64, =
you can use PCP (RFC7225) to tell the CLAT the NAT64 prefix. It also provid=
es additional advantages to the operator to control many related aspects (s=
ee section 3 of RFC7225).<o:p></o:p></span></p><p class=3DMsoNormal style=
=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'>=
<span lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal style=
=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:142.2pt'=
><span lang=3DEN-US>1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If the operator =
wants to enable 464xlat: they should hand out a DNS64 to the CPE.<o:p></o:p=
></span></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:142.2pt'><span lang=3DEN-US>2.&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp; If the operator wants to disable&nbsp;464xlat: th=
ey should NOT hand out a DNS64 to the CPE.<o:p></o:p></span></p><p class=3D=
MsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margi=
n-left:70.8pt'><span lang=3DEN-US>This doesn=E2=80=99t work, because the op=
erator may be using RFC7225 instead of RFC7050. You need to try both in tha=
t case, and you aren=E2=80=99t providing a =E2=80=9Cpriority=E2=80=9D to a =
possible list of mechanisms, which is what RFC8026 does.<o:p></o:p></span><=
/p></div></div></blockquote><div><p class=3DMsoNormal style=3D'mso-margin-t=
op-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'><span lang=3DEN-=
US>&nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'mso=
-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'><span l=
ang=3DEN-US>But it's the same problem again: what's the use case for this D=
HCPv6 option? An operator that's using RFC7225 has an easy way to tell the =
CPE not to do 464xlat: don't hand out the prefix64 to those CPEs. So this i=
s already possible today.<o:p></o:p></span></p></div><div><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left=
:70.8pt'><span lang=3DEN-US>&nbsp;&nbsp;<o:p></o:p></span></p></div><blockq=
uote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0=
cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:=
5.0pt'><div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-=
margin-bottom-alt:auto;margin-left:142.2pt'><span lang=3DEN-US>3.&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp; If the operator uses 464xlat, they should not al=
low the user to change the DNS server.<o:p></o:p></span></p><p class=3DMsoN=
ormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-le=
ft:70.8pt'><span lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left=
:70.8pt'><span lang=3DEN-US>&nbsp;<o:p></o:p></span></p><p class=3DMsoNorma=
l style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:7=
0.8pt'><span lang=3DEN-US>Let=E2=80=99s be realistic. You can=E2=80=99t =E2=
=80=9Cforce=E2=80=9D the customer to avoid changing the DNS =E2=80=A6<o:p><=
/o:p></span></p></div></div></blockquote><div><p class=3DMsoNormal style=3D=
'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:70.8pt'><sp=
an lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal=
 style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:70=
.8pt'><span lang=3DEN-US>On an operator-managed CPE, you can. On a user-man=
aged CPE, you can't. But on such a CPE you probably shouldn't be disabling =
464xlat. If the user wants to use it, it's their CPE, right?<o:p></o:p></sp=
an></p></div></div></div><p class=3DMsoNormal style=3D'mso-margin-top-alt:a=
uto;mso-margin-bottom-alt:auto;margin-left:70.8pt'><span lang=3DEN-US>_____=
__________________________________________ v6ops mailing list </span><a hre=
f=3D"mailto:v6ops@ietf.org" target=3D"_blank"><span lang=3DEN-US>v6ops@ietf=
.org</span></a> <a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" tar=
get=3D"_blank"><span lang=3DEN-US>https://www.ietf.org/mailman/listinfo/v6o=
ps</span></a> <span lang=3DEN-US><o:p></o:p></span></p></div><p class=3DMso=
Normal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0p=
t;margin-left:35.4pt'><span lang=3DEN-US><br>******************************=
****************<br>IPv4 is over<br>Are you ready for the new Internet ?<br=
></span><a href=3D"http://www.consulintel.es" target=3D"_blank"><span lang=
=3DEN-US>http://www.consulintel.es</span></a><span lang=3DEN-US><br>The IPv=
6 Company<br><br>This electronic message contains information which may be =
privileged or confidential. The information is intended to be for the exclu=
sive use of the individual(s) named above and further non-explicilty author=
ized disclosure, copying, distribution or use of the contents of this infor=
mation, even if partially, including attached files, is strictly prohibited=
 and will be considered a criminal offense. If you are not the intended rec=
ipient be aware that any disclosure, copying, distribution or use of the contents of this information, even if partiall=
y, including attached files, is strictly prohibited, will be considered a c=
riminal offense, so you must reply to the original sender to inform about t=
his communication and delete it.<o:p></o:p></span></p></div></blockquote></=
div><p class=3DMsoNormal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;m=
argin-bottom:12.0pt;margin-left:35.4pt'><span lang=3DEN-US><o:p>&nbsp;</o:p=
></span></p><pre style=3D'margin-left:35.4pt'><span lang=3DEN-US>__________=
_____________________________________<o:p></o:p></span></pre><pre style=3D'=
margin-left:35.4pt'><span lang=3DEN-US>v6ops mailing list<o:p></o:p></span>=
</pre><pre style=3D'margin-left:35.4pt'><a href=3D"mailto:v6ops@ietf.org" t=
arget=3D"_blank"><span lang=3DEN-US>v6ops@ietf.org</span></a><span lang=3DE=
N-US><o:p></o:p></span></pre><pre style=3D'margin-left:35.4pt'><a href=3D"h=
ttps://www.ietf.org/mailman/listinfo/v6ops" target=3D"_blank"><span lang=3D=
EN-US>https://www.ietf.org/mailman/listinfo/v6ops</span></a><span lang=3DEN=
-US><o:p></o:p></span></pre></blockquote><p class=3DMsoNormal style=3D'marg=
in-left:35.4pt'><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p></div><p cla=
ss=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3DEN-US>____________=
___________________________________<br>v6ops mailing list<br></span><a href=
=3D"mailto:v6ops@ietf.org" target=3D"_blank"><span lang=3DEN-US>v6ops@ietf.=
org</span></a><span lang=3DEN-US><br></span><a href=3D"https://www.ietf.org=
/mailman/listinfo/v6ops" target=3D"_blank"><span lang=3DEN-US>https://www.i=
etf.org/mailman/listinfo/v6ops</span></a><span lang=3DEN-US><o:p></o:p></sp=
an></p></blockquote></div><p class=3DMsoNormal style=3D'margin-left:35.4pt'=
><span lang=3DEN-US>_______________________________________________ v6ops m=
ailing list v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops <o:p=
></o:p></span></p></div><br>**********************************************<=
br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
<br>
</body></html>

--B_3611744478_1151862628--



From nobody Wed Jun 13 05:29:29 2018
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From: Alexandre Petrescu <alexandru.petrescu@gmail.com>
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To: v6ops@ietf.org
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Date: Wed, 13 Jun 2018 14:29:17 +0200
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/Xy2wxcKWv3Rz6h0nQiR2dYYNFWc>
Subject: Re: [v6ops] When IPv6 breaks IPv4
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Le 13/06/2018 à 11:20, Alexandre Petrescu a écrit :
> 
> 
> Le 27/04/2018 à 05:12, Jen Linkova a écrit :
>> On Thu, Apr 26, 2018 at 6:42 PM, Alexandre Petrescu
>> <alexandre.petrescu@gmail.com> wrote:
>>> Even us, at IETF, whenever we write a new hot Internet Draft we put it
>>> on an IPv4 website first.
>> Actually we we don't.
>>
>>> (I guess datatracker is not reachable on IPv6,
>>> just guess.)
>>
>> I've just completely disabled IPv4 on my workstation and
>> https://datatracker.ietf.org works just fine (I tested browsing the
>> drafts and some links on WG Chair dashboard).
> 
> I have just used an IPv6 linux laptop on an IPv6 cellular link that 
> gives no IPv4.
> 
> The laptop connects ok to https://ietf.org, tools.ietf.org.  I have even 
> tried to register for the next meeting.  I went with the process up to 
> filling the data, but stopped there.
> 
> There are however some websites that dont work, like github.com.  Many 
> people use github for IETF work like drafts, charters, etc.

Other important thing that does not work on IPv6 is paypal.com.  I just 
tried it and it does not work on IPv6, whereas ietf.org works ok on IPv6.

paypal is very important for me during the registration process to 
participate to IETF.  It is very important because I prefer it for 
security reasons.  In the past I had some problems paying with something 
else than paypal.  Now I prefer paypal for whatever I pay.

Without paying with paypal I would not register to IETF.

(this time I dont come to IETF, so it is not really paramount 
importance, but just to let you know: somebody that wants to use IPv6 
and paypal to come to IETF can not).

(this email was sent from a Windows client whose IPv4 box was unchecked, 
and the cellular network access is of PDP type 'IPv6', and with a smtp 
server from google).

Alex
> 
> Alex
> 
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


From nobody Wed Jun 13 05:31:01 2018
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In-reply-to: Your message of "Wed, 13 Jun 2018 14:21:17 +0200 ." <BF51B9C7-A44C-4850-A86D-3F1C7966E8CE@consulintel.es> 
Date: Wed, 13 Jun 2018 14:30:46 +0200
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/yCQvETsHsWuKvOmlhPjoLWmXvN8>
Subject: Re: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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>    Now, this has been said many times, and I don't necessarily
>    agree initially, but I've started to change my mind in the last
>    few years.  ***We DON'T WANT a perfect transition mechanism.***
> 
> 
>    We want some apps to fail, so indirectly it forces to developers
>    and content providers to move them to IPv6.

If you want people to dislike IPv6, then this is the way to do it.

There are plenty of ISPs that used to provide customers with a native IPv4
address and then migrade to IPv6 with some form of NAT.

The way this registers with users is that you don't want IPv6 because that
breaks your internet connection.

There is already a sentiment that IPv6 doesn't do anything useful. That is
now becoming that IPv6 will harm your internet connection. Hang on to your
IPv4 address as long as you can.


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Date: Wed, 13 Jun 2018 14:44:19 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Philip Homburg <pch-v6ops-8@u-1.phicoh.com>, <v6ops@ietf.org>
Message-ID: <F108C2A8-F55A-49FB-B38C-F59F28DC09A3@consulintel.es>
Thread-Topic: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <da095b32-3bb9-d2ec-dd41-e6e526cff83f@hit.bme.hu> <BF51B9C7-A44C-4850-A86D-3F1C7966E8CE@consulintel.es> <m1fT4vH-0000IOC@stereo.hq.phicoh.net>
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Subject: Re: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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    >    Now, this has been said many times, and I don't necessarily

    >    agree initially, but I've started to change my mind in the last

    >    few years.  ***We DON'T WANT a perfect transition mechanism.***

    > 

    > 

    >    We want some apps to fail, so indirectly it forces to developers

    >    and content providers to move them to IPv6.

    

    If you want people to dislike IPv6, then this is the way to do it.





Don't read it literally, and also understand that I've said " and I don't necessarily agree initially". What I'm trying to say is that is that if 464XLAT is working in cellular, problems will appear there, users there can't switch off IPv6, so problems get sorted out by the app developer, and that means also sorted out in the wireline. I'm not trying to say "make it imperfect on purpose!"



    

    There are plenty of ISPs that used to provide customers with a native IPv4

    address and then migrade to IPv6 with some form of NAT.

    

    The way this registers with users is that you don't want IPv6 because that

    breaks your internet connection.

    

    There is already a sentiment that IPv6 doesn't do anything useful. That is

    now becoming that IPv6 will harm your internet connection. Hang on to your

    IPv4 address as long as you can.

    






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From: Alexandre Petrescu <alexandru.petrescu@gmail.com>
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Subject: Re: [v6ops] When IPv6 breaks IPv4
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When going to IETF meetings, one is concerned about which hotel to book. 
  Typically the concerns are the price range, distance from IETF venue, 
transportation, comfort conditions, WiFi, breakfast, rating by others, etc.

One other interesting criterion is whether the reservation with the link 
provided by IETF can be made on IPv6, or not.

For IETF 102
Fairmont the Queen Elizabeth: IPv6 reservation ok
Le Centre Sheraton: IPv6 reservation not possible
others...

Alex

Le 13/06/2018 à 11:20, Alexandre Petrescu a écrit :
> 
> 
> Le 27/04/2018 à 05:12, Jen Linkova a écrit :
>> On Thu, Apr 26, 2018 at 6:42 PM, Alexandre Petrescu
>> <alexandre.petrescu@gmail.com> wrote:
>>> Even us, at IETF, whenever we write a new hot Internet Draft we put it
>>> on an IPv4 website first.
>> Actually we we don't.
>>
>>> (I guess datatracker is not reachable on IPv6,
>>> just guess.)
>>
>> I've just completely disabled IPv4 on my workstation and
>> https://datatracker.ietf.org works just fine (I tested browsing the
>> drafts and some links on WG Chair dashboard).
> 
> I have just used an IPv6 linux laptop on an IPv6 cellular link that 
> gives no IPv4.
> 
> The laptop connects ok to https://ietf.org, tools.ietf.org.  I have even 
> tried to register for the next meeting.  I went with the process up to 
> filling the data, but stopped there.
> 
> There are however some websites that dont work, like github.com.  Many 
> people use github for IETF work like drafts, charters, etc.
> 
> Alex
> 
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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Date: Wed, 13 Jun 2018 14:50:48 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Philip Homburg <pch-v6ops-8@u-1.phicoh.com>, <v6ops@ietf.org>
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Thread-Topic: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <28C9E7B4-1D2F-4C65-A121-90E9AFB470AD@gmail.com> <CAHL_VyDc1iF7T4k3J1uQvDYUpxaRg7_eOqK6poV_cZ-NAFAEDQ@mail.gmail.com> <7B87AAA7-E5C5-498E-A41E-8927BC554F29@consulintel.es> <CAKD1Yr2HpJFvW3=CQQV6HVr6tOGSW=Kj5mpO-rLLrEEuPZ4vmg@mail.gmail.com> <966D347E-0A4F-4F51-90AB-03D178EF4CEB@consulintel.es> <CAKD1Yr3uSr-KJCOhTJvaf1xh4g7hOqwzxZSv7TNH5fB5Z1VigQ@mail.gmail.com> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <da095b32-3bb9-d2ec-dd41-e6e526cff83f@hit.bme.hu> <BF51B9C7-A44C-4850-A86D-3F1C7966E8CE@consulintel.es> <m1fT4vH-0000IOC@stereo.hq.phicoh.net> <F108C2A8-F55A-49FB-B38C-F59F28DC09A3@consulintel.es>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/_3U0QTT62Od-JQDzLMhwhEhoDiI>
Subject: Re: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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In fact ... I started to believe a few years ago, that the worst mistake th=
e IETF did with IPv6, was to define more than just one transition mechanism=
.



Maybe we needed one for 6in4 and one for 4in6, that's it.



If we had focused in only one (even if not perfect), since the beginning, a=
ll routers will support it, will be the same for wired and not wired networ=
ks, we could have saved tons of hours of work to many IETF WGs, many OS and=
 app developers, many operators, many enterprises, many students, etc.



Of course, we didn't knew (no crystal ball) how this will evolve.



Maybe is time to start deprecating 6in4 ones and may be some of the 4in6 on=
es as well?



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de JORDI PALET MARTINEZ <jordi=
.palet=3D40consulintel.es@dmarc.ietf.org>

Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 14:45

Para: Philip Homburg <pch-v6ops-8@u-1.phicoh.com>, <v6ops@ietf.org>

Asunto: Re: [v6ops] Is 464XLAT really inferior to all other IPv6 transition=
 technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6o=
ps-transition-ipv4aas



   =20

   =20

        >    Now, this has been said many times, and I don't necessarily

   =20

        >    agree initially, but I've started to change my mind in the las=
t

   =20

        >    few years.  ***We DON'T WANT a perfect transition mechanism.**=
*

   =20

        >=20

   =20

        >=20

   =20

        >    We want some apps to fail, so indirectly it forces to develope=
rs

   =20

        >    and content providers to move them to IPv6.

   =20

       =20

   =20

        If you want people to dislike IPv6, then this is the way to do it.

   =20

   =20

   =20

   =20

   =20

    Don't read it literally, and also understand that I've said " and I don=
't necessarily agree initially". What I'm trying to say is that is that if =
464XLAT is working in cellular, problems will appear there, users there can=
't switch off IPv6, so problems get sorted out by the app developer, and th=
at means also sorted out in the wireline. I'm not trying to say "make it im=
perfect on purpose!"

   =20

   =20

   =20

       =20

   =20

        There are plenty of ISPs that used to provide customers with a nati=
ve IPv4

   =20

        address and then migrade to IPv6 with some form of NAT.

   =20

       =20

   =20

        The way this registers with users is that you don't want IPv6 becau=
se that

   =20

        breaks your internet connection.

   =20

       =20

   =20

        There is already a sentiment that IPv6 doesn't do anything useful. =
That is

   =20

        now becoming that IPv6 will harm your internet connection. Hang on =
to your

   =20

        IPv4 address as long as you can.

   =20

       =20

   =20

   =20

   =20

   =20

   =20

   =20

    **********************************************

    IPv4 is over

    Are you ready for the new Internet ?

    http://www.consulintel.es

    The IPv6 Company

   =20

    This electronic message contains information which may be privileged or=
 confidential. The information is intended to be for the exclusive use of t=
he individual(s) named above and further non-explicilty authorized disclosu=
re, copying, distribution or use of the contents of this information, even =
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   =20

   =20

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
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Date: Wed, 13 Jun 2018 09:55:32 -0300 (ART)
From: Alejandro D'Egidio <adegidio@telecentro.net.ar>
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Thread-Topic: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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--=_3474df81-ccd3-42f9-b02c-fbd4bebd8dc3
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Hello Lorenzo,=20
I really appreciate your comments but if you don't like 464XLAT it doesn't =
mean that I can have the choice to use it. I like the idea to have CLAT fun=
ctionality in CPE.=20
I think ISPs should have the chance to decide which transition method works=
 better on its network and infrastructure.=20


Regards,=20

ALEJANDRO D'EGIDIO=20
Jefe de Ingenier=C3=ADa de Backbone=20
F: +54 11 3977 1025=C2=A0 | M: +54 911 5794 1589=20
Lavard=C3=A9n 157. Piso 3. CABA (C1437FBC)=20


De: "JORDI PALET MARTINEZ" <jordi.palet=3D40consulintel.es@dmarc.ietf.org>=
=20
Para: "Lorenzo Colitti" <lorenzo=3D40google.com@dmarc.ietf.org>, lencse@hit=
.bme.hu=20
CC: "v6ops@ietf.org WG" <v6ops@ietf.org>=20
Enviados: Mi=C3=A9rcoles, 13 de Junio 2018 9:21:17=20
Asunto: Re: [v6ops] Is 464XLAT really inferior to all other IPv6 transition=
 technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6o=
ps-transition-ipv4aas=20



Resending as my email client formatted it weirdly =E2=80=A6 and adding one =
more comment.=20



This always depends on your perspective, network, user requirements, etc. D=
ifferent operators have different requirements.=20



Here are a few disadvantages of 464xlat:=20


=C2=B7 It consumes lots of state on the NAT64 (one state table entry for ev=
ery connection). MAP is much better since it uses port ranges.=20



Some ISPs care less about state and care more about having a better usage o=
f each IPv4 address and providing as many ports as the users need automatic=
ally.=20



With NAT64, you have for each user as many ports as they need, nothing =E2=
=80=9Cextra=E2=80=9D to configure for each user. With MAP you pre-define a =
number of ports per user.=20



Consequently, with NAT64 you make a much better usage of every single IPv4 =
address, because they become shared based dynamically on =E2=80=9Creal-flow=
-per-port=E2=80=9D needs at each given time.=20





=C2=B7 It doesn't allow any inbound connections unless the NAT cooperates. =
MAP is better in the sense that you can at least receive connections within=
 your port range.=20



Some ISPs don=E2=80=99t want inbound connections to be statically managed b=
y users, they offer different services with different prices, etc. I=E2=80=
=99m not saying I agree with that. Even do, you have ways to cooperate with=
 the NAT64, PCP, etc., to do that. Even for corporate users you can mix tha=
t with SIIT-DC or alike functions.=20



Inbound connections in your port range is useless for most of the users, or=
 apps or devices, because they don=E2=80=99t allow other ports, and yes, yo=
u can sometimes play tricks with the CPE port forwarding, etc., etc.=20

=C2=B7 The transformation is lossy because there are IPv4 header fields tha=
t cannot be translated. MAP-E is better because the encapsulation preserves=
 the original packet header.=20



None of the transition mechanisms can be perfect, except probably dual-stac=
k, but we know we can=E2=80=99t do dual-stack for every possible network, b=
ecause we don=E2=80=99t have sufficient addresses, right?=20



Now, this has been said many times, and I don=E2=80=99t necessarily agree i=
nitially, but I=E2=80=99ve started to change my mind in the last few years.=
 ***We DON=E2=80=99T WANT a perfect transition mechanism.***=20



We want some apps to fail, so indirectly it forces to developers and conten=
t providers to move them to IPv6.=20



So, all them are imperfect in one way or another, but having a single one, =
is much better, cheaper and easier, from all the perspectives that having m=
any. Developers will fix easier anything for a single mechanism than for ma=
ny, everything will happen faster, and of course, since 464XLAT is the one =
with has more users worldwide, it makes sense to push for that one everywhe=
re, because the problems that the app developers find in the cellular world=
, will be sorted out, so those apps will be fixed for both, cellular and no=
n-cellular.=20



Also, an operator with both, cellular and non-cellular networks, is very in=
terested to support a single mechanism instead of two or more. Even an oper=
ator without a cellular network, many times need to provide backup by means=
 of LTE and that means hybrid routers with both wired and LTE interfaces. I=
t is much simpler to have a single mechanism for both, because even the cel=
lular network is not its own network, it can use the same NAT64 (or the sam=
e outsourced one for both kind of connections).=20



I was not a fan of 464XLAT initially when it was developed, but market make=
 me change my mind.=20



In summary, it all depends on your perspective, but if our goal is to push =
as much as possible for a higher % of IPv6-only traffic, I=E2=80=99m convin=
ced cellular networks, which are the ones with higher % of penetration and =
growth, clearly defined the path that we must follow.=20







On Wed, Jun 13, 2018 at 6:12 PM Lencse G=C3=A1bor < [ mailto:lencse@hit.bme=
.hu | lencse@hit.bme.hu ] > wrote:=20





Dear Lorenzo,=20

I think it is a rather strong statement that "464XLAT is pretty much the wo=
rse of the transition mechanisms from a technical perspective."=20

We have listed 26+ IPv6 transition technologies in our workshop paper [1], =
but there are even more solutions exist.=20

Which of them do you mean to be better than 464XLAT?=20

What technical points do you consider when stating that 464XLAT is worse th=
an the others? (E.g. resource consumption, scalability, security, ease of i=
mplementation, etc.)=20

I think it is important for network operators to have a balanced view of th=
e advantages and disadvantages of the different IPv6 transition mechanisms,=
 this is why I am asking these questions.=20

Best regards,=20

G=C3=A1bor Lencse=20


[1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition Technologies f=
or Security Analysis", IEICE Communications Society Internet Architecture W=
orkshop, Tokyo, Japan, Aug.. 28, 2017, IEICE Tech. Rep. , vol. 117, no. 187=
, pp. 19-24. Available online: [ http://www.hit.bme.hu/~lencse/publications=
/IEICE-IA-2017-survey.pdf | http://www.hit.bme.hu/~lencse/publications/IEIC=
E-IA-2017-survey.pdf ]=20


6/13/2018 9:38 AM keltez=C3=A9ssel, Lorenzo Colitti =C3=ADrta:=20

BQ_BEGIN



That goes back to my earlier point of that from a technical perspective 464=
xlat is pretty much the worst of the transition mechanisms.. I don't think =
we should be recommending running it on wireline at all, let alone prioriti=
zing it over something else .:-)=20





On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET MARTINEZ <jordi.palet=3D [ mail=
to:40consulintel.es@dmarc.ietf.org | 40consulintel.es@dmarc.ietf.org ] > wr=
ote:=20

BQ_BEGIN



Lorenzo, you=E2=80=99re missing the key aspect: Being able to prioritize, w=
hen an ISP supports several transition mechanisms.=20



RFC8026 key aspect is priority. If we don=E2=80=99t add an option code for =
464XLAT, then it can=E2=80=99t be managed the same way.=20



Regards,=20

Jordi=20









De: v6ops < [ mailto:v6ops-bounces@ietf.org | v6ops-bounces@ietf.org ] > en=
 nombre de Lorenzo Colitti <lorenzo=3D [ mailto:40google.com@dmarc.ietf.org=
 | 40google.com@dmarc.ietf.org ] >=20
Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 4:45=20
Para: <jordi.palet=3D [ mailto:40consulintel.es@dmarc.ietf.org | 40consulin=
tel.es@dmarc.ietf.org ] >=20
CC: " [ mailto:v6ops@ietf.org | v6ops@ietf.org ] WG" < [ mailto:v6ops@ietf.=
org | v6ops@ietf.org ] >=20
Asunto: Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v6ops=
-transition-ipv4aas=20





On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ <jordi.palet=3D [ mail=
to:40consulintel.es@dmarc.ietf.org | 40consulintel..es@dmarc.ietf.org ] > w=
rote:=20

BQ_BEGIN



You don=E2=80=99t need RFC7050 neither DNS64, you can use PCP (RFC7225) to =
tell the CLAT the NAT64 prefix. It also provides additional advantages to t=
he operator to control many related aspects (see section 3 of RFC7225).=20



1. If the operator wants to enable 464xlat: they should hand out a DNS64 to=
 the CPE.=20

2. If the operator wants to disable 464xlat: they should NOT hand out a DNS=
64 to the CPE.=20

This doesn=E2=80=99t work, because the operator may be using RFC7225 instea=
d of RFC7050. You need to try both in that case, and you aren=E2=80=99t pro=
viding a =E2=80=9Cpriority=E2=80=9D to a possible list of mechanisms, which=
 is what RFC8026 does.=20








But it's the same problem again: what's the use case for this DHCPv6 option=
? An operator that's using RFC7225 has an easy way to tell the CPE not to d=
o 464xlat: don't hand out the prefix64 to those CPEs. So this is already po=
ssible today.=20




BQ_BEGIN



3. If the operator uses 464xlat, they should not allow the user to change t=
he DNS server.=20





Let=E2=80=99s be realistic. You can=E2=80=99t =E2=80=9Cforce=E2=80=9D the c=
ustomer to avoid changing the DNS =E2=80=A6=20

BQ_END






On an operator-managed CPE, you can. On a user-managed CPE, you can't. But =
on such a CPE you probably shouldn't be disabling 464xlat. If the user want=
s to use it, it's their CPE, right?=20


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--=_3474df81-ccd3-42f9-b02c-fbd4bebd8dc3
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<html><body><div style=3D"font-family: Times New Roman; font-size: 12pt; co=
lor: #000000"><div>Hello Lorenzo,<br></div><div>I really appreciate your co=
mments but if you don't like 464XLAT it doesn't mean that I can have the ch=
oice to use it. I like the idea to have CLAT functionality in CPE.</div><di=
v>I think ISPs should have the chance to decide which transition method wor=
ks better on its network and infrastructure.</div><div><br data-mce-bogus=
=3D"1"></div><div><style><!--

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--></style></div><div><br></div><div>Regards,</div><div><br></div><div data=
-marker=3D"__SIG_PRE__"><div style=3D"font-family: arial, helvetica, sans-s=
erif; font-size: 13.3333px; background-color: #fdfdfd;" data-mce-style=3D"f=
ont-family: arial, helvetica, sans-serif; font-size: 13.3333px; background-=
color: #fdfdfd;"><pre style=3D"white-space: pre-wrap; word-wrap: break-word=
 !important;" data-mce-style=3D"white-space: pre-wrap; word-wrap: break-wor=
d !important;"><b style=3D"word-wrap: break-word !important;" data-mce-styl=
e=3D"word-wrap: break-word !important;"><span lang=3D"ES" style=3D"font-siz=
e: 8pt; font-family: arial, sans-serif; color: #666666; word-wrap: break-wo=
rd !important;" data-mce-style=3D"font-size: 8pt; font-family: arial, sans-=
serif; color: #666666; word-wrap: break-word !important;">ALEJANDRO D'EGIDI=
O<br style=3D"word-wrap: break-word !important;" data-mce-style=3D"word-wra=
p: break-word !important;">Jefe de Ingenier=C3=ADa de Backbone<br style=3D"=
word-wrap: break-word !important;" data-mce-style=3D"word-wrap: break-word =
!important;"></span></b><b style=3D"word-wrap: break-word !important;" data=
-mce-style=3D"word-wrap: break-word !important;"><span lang=3D"ES" style=3D=
"font-size: 9.5pt; font-family: -webkit-standard; word-wrap: break-word !im=
portant;" data-mce-style=3D"font-size: 9.5pt; font-family: -webkit-standard=
; word-wrap: break-word !important;"></span></b><span lang=3D"ES" style=3D"=
font-size: 8pt; font-family: arial, sans-serif; color: #666666; word-wrap: =
break-word !important;" data-mce-style=3D"font-size: 8pt; font-family: aria=
l, sans-serif; color: #666666; word-wrap: break-word !important;">F: +54 11=
 3977 1025&nbsp; | M: +54 911 5794 1589<br style=3D"word-wrap: break-word !=
important;" data-mce-style=3D"word-wrap: break-word !important;">Lavard=C3=
=A9n 157. Piso 3. CABA (C1437FBC)</span></pre></div><div style=3D"font-fami=
ly: arial, helvetica, sans-serif; font-size: 13.3333px; background-color: #=
fdfdfd;" data-mce-style=3D"font-family: arial, helvetica, sans-serif; font-=
size: 13.3333px; background-color: #fdfdfd;"><img src=3D"http://webmail.tel=
ecentro.net.ar/home/adegidio@telecentro.net.ar/Briefcase/Firma.png"></div><=
/div><div><br></div><hr id=3D"zwchr" data-marker=3D"__DIVIDER__"><div data-=
marker=3D"__HEADERS__"><b>De: </b>"JORDI PALET MARTINEZ" &lt;jordi.palet=3D=
40consulintel.es@dmarc.ietf.org&gt;<br><b>Para: </b>"Lorenzo Colitti" &lt;l=
orenzo=3D40google.com@dmarc.ietf.org&gt;, lencse@hit.bme.hu<br><b>CC: </b>"=
v6ops@ietf.org WG" &lt;v6ops@ietf.org&gt;<br><b>Enviados: </b>Mi=C3=A9rcole=
s, 13 de Junio 2018 9:21:17<br><b>Asunto: </b>Re: [v6ops] Is 464XLAT really=
 inferior to all other IPv6 transition technologies? -- Re: updating RFC802=
6 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas<br></div><div><=
br></div><div data-marker=3D"__QUOTED_TEXT__"><div class=3D"WordSection1"><=
p class=3D"MsoNormal"><span lang=3D"EN-US">Resending as my email client for=
matted it weirdly =E2=80=A6 and adding one more comment.</span></p><p class=
=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;</span></p><p class=3D"MsoNormal"=
><span lang=3D"EN-US">This always depends on your perspective, network, use=
r requirements, etc. Different operators have different requirements.</span=
></p><p class=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;</span></p><p class=
=3D"MsoNormal" style=3D"margin-left: 35.4pt;" data-mce-style=3D"margin-left=
: 35.4pt;"><span lang=3D"EN-US">Here are a few disadvantages of 464xlat:</s=
pan></p><div><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-=
margin-bottom-alt: auto; margin-left: 71.4pt; text-indent: -18.0pt; mso-lis=
t: l0 level1 lfo2;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-=
bottom-alt: auto; margin-left: 71.4pt; text-indent: -18.0pt; mso-list: l0 l=
evel1 lfo2;"><span style=3D"font-size: 10.0pt; font-family: Symbol;" data-m=
ce-style=3D"font-size: 10.0pt; font-family: Symbol;"><span style=3D"mso-lis=
t: Ignore;" data-mce-style=3D"mso-list: Ignore;">=C2=B7<span style=3D"font:=
 7.0pt 'Times New Roman';" data-mce-style=3D"font: 7.0pt 'Times New Roman';=
">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><sp=
an lang=3D"EN-US">It consumes lots of state on the NAT64 (one state table e=
ntry for every connection). </span>MAP is much better since it uses port ra=
nges.</p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-marg=
in-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margi=
n-bottom-alt: auto;"><span lang=3D"EN-US">&nbsp;</span></p><p class=3D"MsoN=
ormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" dat=
a-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><spa=
n lang=3D"EN-US">Some ISPs care less about state and care more about having=
 a better usage of each IPv4 address and providing as many ports as the use=
rs need automatically.</span></p><p class=3D"MsoNormal" style=3D"mso-margin=
-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-=
top-alt: auto; mso-margin-bottom-alt: auto;"><span lang=3D"EN-US">&nbsp;</s=
pan></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margi=
n-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin=
-bottom-alt: auto;"><span lang=3D"EN-US">With NAT64, you have for each user=
 as many ports as they need, nothing =E2=80=9Cextra=E2=80=9D to configure f=
or each user. With MAP you pre-define a number of ports per user.</span></p=
><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-botto=
m-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span lang=3D"EN-US">&nbsp;</span></p><p class=3D"MsoNormal" s=
tyle=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-st=
yle=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span lang=
=3D"EN-US">Consequently, with NAT64 you make a much better usage of every s=
ingle IPv4 address, because they become shared based dynamically on =E2=80=
=9Creal-flow-per-port=E2=80=9D needs at each given time.</span></p><p class=
=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: au=
to;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: aut=
o;"><span lang=3D"EN-US">&nbsp;</span></p><p class=3D"MsoNormal" style=3D"m=
so-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"ms=
o-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span lang=3D"EN-US">=
&nbsp;</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; =
mso-margin-bottom-alt: auto; margin-left: 71.4pt; text-indent: -18.0pt; mso=
-list: l0 level1 lfo2;" data-mce-style=3D"mso-margin-top-alt: auto; mso-mar=
gin-bottom-alt: auto; margin-left: 71.4pt; text-indent: -18.0pt; mso-list: =
l0 level1 lfo2;"><span lang=3D"EN-US" style=3D"font-size: 10.0pt; font-fami=
ly: Symbol;" data-mce-style=3D"font-size: 10.0pt; font-family: Symbol;"><sp=
an style=3D"mso-list: Ignore;" data-mce-style=3D"mso-list: Ignore;">=C2=B7<=
span style=3D"font: 7.0pt 'Times New Roman';" data-mce-style=3D"font: 7.0pt=
 'Times New Roman';">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </spa=
n></span></span><span lang=3D"EN-US">It doesn't allow any inbound connectio=
ns unless the NAT cooperates. MAP is better in the sense that you can at le=
ast receive connections within your port range.</span></p><p class=3D"MsoNo=
rmal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data=
-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span=
 lang=3D"EN-US">&nbsp;</span></p><p class=3D"MsoNormal" style=3D"mso-margin=
-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-=
top-alt: auto; mso-margin-bottom-alt: auto;"><span lang=3D"EN-US">Some ISPs=
 don=E2=80=99t want inbound connections to be statically managed by users, =
they offer different services with different prices, etc. I=E2=80=99m not s=
aying I agree with that. Even do, you have ways to cooperate with the NAT64=
, PCP, etc., to do that. Even for corporate users you can mix that with SII=
T-DC or alike functions.</span></p><p class=3D"MsoNormal" style=3D"mso-marg=
in-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margi=
n-top-alt: auto; mso-margin-bottom-alt: auto;"><span lang=3D"EN-US">&nbsp;<=
/span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-mar=
gin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-marg=
in-bottom-alt: auto;"><span lang=3D"EN-US">Inbound connections in your port=
 range is useless for most of the users, or apps or devices, because they d=
on=E2=80=99t allow other ports, and yes, you can sometimes play tricks with=
 the CPE port forwarding, etc., etc.</span></p><p class=3D"MsoNormal" style=
=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 71.=
4pt; text-indent: -18.0pt; mso-list: l0 level1 lfo2;" data-mce-style=3D"mso=
-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 71.4pt; te=
xt-indent: -18.0pt; mso-list: l0 level1 lfo2;"><span lang=3D"EN-US" style=
=3D"font-size: 10.0pt; font-family: Symbol;" data-mce-style=3D"font-size: 1=
0.0pt; font-family: Symbol;"><span style=3D"mso-list: Ignore;" data-mce-sty=
le=3D"mso-list: Ignore;">=C2=B7<span style=3D"font: 7.0pt 'Times New Roman'=
;" data-mce-style=3D"font: 7.0pt 'Times New Roman';">&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span lang=3D"EN-US">The tr=
ansformation is lossy because there are IPv4 header fields that cannot be t=
ranslated. MAP-E is better because the encapsulation preserves the original=
 packet header.</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-al=
t: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt=
: auto; mso-margin-bottom-alt: auto;"><span lang=3D"EN-US">&nbsp;</span></p=
><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-botto=
m-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span lang=3D"EN-US">None of the transition mechanisms can be =
perfect, except probably dual-stack, but we know we can=E2=80=99t do dual-s=
tack for every possible network, because we don=E2=80=99t have sufficient a=
ddresses, right?</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-a=
lt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-al=
t: auto; mso-margin-bottom-alt: auto;"><span lang=3D"EN-US">&nbsp;</span></=
p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bott=
om-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-botto=
m-alt: auto;"><span lang=3D"EN-US">Now, this has been said many times, and =
I don=E2=80=99t necessarily agree initially, but I=E2=80=99ve started to ch=
ange my mind in the last few years. ***We DON=E2=80=99T WANT a perfect tran=
sition mechanism.***</span></p><p class=3D"MsoNormal" style=3D"mso-margin-t=
op-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-to=
p-alt: auto; mso-margin-bottom-alt: auto;"><span lang=3D"EN-US">&nbsp;</spa=
n></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-=
bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-b=
ottom-alt: auto;"><span lang=3D"EN-US">We want some apps to fail, so indire=
ctly it forces to developers and content providers to move them to IPv6.</s=
pan></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margi=
n-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin=
-bottom-alt: auto;"><span lang=3D"EN-US">&nbsp;</span></p><p class=3D"MsoNo=
rmal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data=
-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span=
 lang=3D"EN-US">So, all them are imperfect in one way or another, but havin=
g a single one, is much better, cheaper and easier, from all the perspectiv=
es that having many. Developers will fix easier anything for a single mecha=
nism than for many, everything will happen faster, and of course, since 464=
XLAT is the one with has more users worldwide, it makes sense to push for t=
hat one everywhere, because the problems that the app developers find in th=
e cellular world, will be sorted out, so those apps will be fixed for both,=
 cellular and non-cellular.</span></p><p class=3D"MsoNormal" style=3D"mso-m=
argin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-ma=
rgin-top-alt: auto; mso-margin-bottom-alt: auto;"><span lang=3D"EN-US">&nbs=
p;</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-=
margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-m=
argin-bottom-alt: auto;"><span lang=3D"EN-US">Also, an operator with both, =
cellular and non-cellular networks, is very interested to support a single =
mechanism instead of two or more. Even an operator without a cellular netwo=
rk, many times need to provide backup by means of LTE and that means hybrid=
 routers with both wired and LTE interfaces. It is much simpler to have a s=
ingle mechanism for both, because even the cellular network is not its own =
network, it can use the same NAT64 (or the same outsourced one for both kin=
d of connections).</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top=
-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-=
alt: auto; mso-margin-bottom-alt: auto;"><span lang=3D"EN-US">&nbsp;</span>=
</p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bo=
ttom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bot=
tom-alt: auto;"><span lang=3D"EN-US">I was not a fan of 464XLAT initially w=
hen it was developed, but market make me change my mind.</span></p><p class=
=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: au=
to;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: aut=
o;"><span lang=3D"EN-US">&nbsp;</span></p><p class=3D"MsoNormal" style=3D"m=
so-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"ms=
o-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span lang=3D"EN-US">=
In summary, it all depends on your perspective, but if our goal is to push =
as much as possible for a higher % of IPv6-only traffic, I=E2=80=99m convin=
ced cellular networks, which are the ones with higher % of penetration and =
growth, clearly defined the path that we must follow. </span></p></div><p c=
lass=3D"MsoNormal"><span lang=3D"EN-US">&nbsp;</span></p><p class=3D"MsoNor=
mal" style=3D"margin-left: 35.4pt;" data-mce-style=3D"margin-left: 35.4pt;"=
><span lang=3D"EN-US">&nbsp;</span></p><div><div><p class=3D"MsoNormal" sty=
le=3D"margin-left: 35.4pt;" data-mce-style=3D"margin-left: 35.4pt;"><span l=
ang=3D"EN-US">On Wed, Jun 13, 2018 at 6:12 PM Lencse G=C3=A1bor &lt;</span>=
<a href=3D"mailto:lencse@hit.bme.hu" target=3D"_blank"><span lang=3D"EN-US"=
>lencse@hit.bme.hu</span></a><span lang=3D"EN-US">&gt; wrote:</span></p></d=
iv><blockquote style=3D"border: none; border-left: solid #CCCCCC 1.0pt; pad=
ding: 0cm 0cm 0cm 6.0pt; margin: 5.0pt 0cm 5.0pt 4.8pt;" data-mce-style=3D"=
border: none; border-left: solid #CCCCCC 1.0pt; padding: 0cm 0cm 0cm 6.0pt;=
 margin: 5.0pt 0cm 5.0pt 4.8pt;"><div><p class=3D"MsoNormal" style=3D"mso-m=
argin-top-alt: 0cm; margin-right: 0cm; margin-bottom: 12.0pt; margin-left: =
35.4pt;" data-mce-style=3D"mso-margin-top-alt: 0cm; margin-right: 0cm; marg=
in-bottom: 12.0pt; margin-left: 35.4pt;"><span lang=3D"EN-US">Dear Lorenzo,=
<br><br>I think it is a rather strong statement that "464XLAT is pretty muc=
h the worse of the transition mechanisms from a technical perspective."<br>=
<br>We have listed 26+ IPv6 transition technologies in our workshop paper [=
1], but there are even more solutions exist. <br><br>Which of them do you m=
ean to be better than 464XLAT?<br><br>What technical points do you consider=
 when stating that 464XLAT is worse than the others? (E.g. resource consump=
tion, scalability, security, ease of implementation, etc.)<br><br>I think i=
t is important for network operators to have a balanced view of the advanta=
ges and disadvantages of the different IPv6 transition mechanisms, this is =
why I am asking these questions.<br><br>Best regards,<br><br>G=C3=A1bor Len=
cse<br><br><br>[1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition=
 Technologies for Security Analysis", IEICE Communications Society Internet=
 Architecture Workshop, Tokyo, Japan, Aug.. 28, 2017, <i>IEICE Tech. Rep.</=
i>, vol. 117, no. 187, pp. 19-24. Available online: </span><a href=3D"http:=
//www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf" target=3D"_=
blank"><span lang=3D"EN-US">http://www.hit.bme.hu/~lencse/publications/IEIC=
E-IA-2017-survey.pdf</span></a><span lang=3D"EN-US"></span></p><div><p clas=
s=3D"MsoNormal" style=3D"margin-left: 35.4pt;" data-mce-style=3D"margin-lef=
t: 35.4pt;"><span lang=3D"EN-US">6/13/2018 9:38 AM keltez=C3=A9ssel, Lorenz=
o Colitti =C3=ADrta:</span></p></div><blockquote style=3D"margin-top: 5..0p=
t; margin-bottom: 5.0pt;" data-mce-style=3D"margin-top: 5..0pt; margin-bott=
om: 5.0pt;"><div><p class=3D"MsoNormal" style=3D"margin-left: 35..4pt;" dat=
a-mce-style=3D"margin-left: 35..4pt;"><span lang=3D"EN-US">That goes back t=
o my earlier point of that from a technical perspective 464xlat is pretty m=
uch the worst of the transition mechanisms.. I don't think we should be rec=
ommending running it on wireline at all, let alone prioritizing it over som=
ething else .:-)</span></p></div><p class=3D"MsoNormal" style=3D"margin-lef=
t: 35.4pt;" data-mce-style=3D"margin-left: 35.4pt;"><span lang=3D"EN-US">&n=
bsp;</span></p><div><div><p class=3D"MsoNormal" style=3D"margin-left: 35.4p=
t;" data-mce-style=3D"margin-left: 35.4pt;"><span lang=3D"EN-US">On Wed, Ju=
n 13, 2018 at 3:50 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D</span><a href=
=3D"mailto:40consulintel.es@dmarc.ietf.org" target=3D"_blank"><span lang=3D=
"EN-US">40consulintel.es@dmarc.ietf.org</span></a><span lang=3D"EN-US">&gt;=
 wrote:</span></p></div><blockquote style=3D"border: none; border-left: sol=
id #CCCCCC 1.0pt; padding: 0cm 0cm 0cm 6.0pt; margin: 5.0pt 0cm 5.0pt 4.8pt=
;" data-mce-style=3D"border: none; border-left: solid #CCCCCC 1.0pt; paddin=
g: 0cm 0cm 0cm 6.0pt; margin: 5.0pt 0cm 5.0pt 4.8pt;"><div><div><p class=3D=
"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;=
 margin-left: 35.4pt;" data-mce-style=3D"mso-margin-top-alt: auto; mso-marg=
in-bottom-alt: auto; margin-left: 35.4pt;"><span lang=3D"EN-US">Lorenzo, yo=
u=E2=80=99re missing the key aspect: Being able to prioritize, when an ISP =
supports several transition mechanisms.</span></p><p class=3D"MsoNormal" st=
yle=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: =
35.4pt;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt:=
 auto; margin-left: 35.4pt;"><span lang=3D"EN-US">&nbsp;</span></p><p class=
=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: au=
to; margin-left: 35.4pt;" data-mce-style=3D"mso-margin-top-alt: auto; mso-m=
argin-bottom-alt: auto; margin-left: 35.4pt;"><span lang=3D"EN-US">RFC8026 =
key aspect is priority. If we don=E2=80=99t add an option code for 464XLAT,=
 then it can=E2=80=99t be managed the same way.</span></p><div><p class=3D"=
MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; =
margin-left: 35.4pt;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margi=
n-bottom-alt: auto; margin-left: 35.4pt;"><span lang=3D"EN-US" style=3D"fon=
t-size: 10.5pt; color: black;" data-mce-style=3D"font-size: 10.5pt; color: =
black;"><br>Regards,</span><span lang=3D"EN-US"></span></p><p class=3D"MsoN=
ormal" style=3D"mso-margin-top-alt: auto; margin-bottom: 12.0pt; margin-lef=
t: 35.4pt;" data-mce-style=3D"mso-margin-top-alt: auto; margin-bottom: 12.0=
pt; margin-left: 35.4pt;"><span lang=3D"EN-US" style=3D"font-size: 10.5pt; =
color: black;" data-mce-style=3D"font-size: 10.5pt; color: black;">Jordi</s=
pan><span lang=3D"EN-US"></span></p><p class=3D"MsoNormal" style=3D"mso-mar=
gin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 35.4pt;" data-=
mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-=
left: 35.4pt;"><span lang=3D"EN-US" style=3D"font-size: 10.5pt; color: blac=
k;" data-mce-style=3D"font-size: 10.5pt; color: black;">&nbsp;</span><span =
lang=3D"EN-US"></span></p></div><p class=3D"MsoNormal" style=3D"mso-margin-=
top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 35.4pt;" data-mce-=
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left=
: 35.4pt;"><span lang=3D"EN-US">&nbsp;</span></p><p class=3D"MsoNormal" sty=
le=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 3=
5.4pt;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: =
auto; margin-left: 35.4pt;"><span lang=3D"EN-US">&nbsp;</span></p><div styl=
e=3D"border: none; border-top: solid #B5C4DF 1.0pt; padding: 3.0pt 0cm 0cm =
0cm;" data-mce-style=3D"border: none; border-top: solid #B5C4DF 1.0pt; padd=
ing: 3.0pt 0cm 0cm 0cm;"><p class=3D"MsoNormal" style=3D"mso-margin-top-alt=
: auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt;" data-mce-style=
=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 70.=
8pt;"><b><span lang=3D"EN-US" style=3D"font-size: 12.0pt; color: black;" da=
ta-mce-style=3D"font-size: 12.0pt; color: black;">De: </span></b><span lang=
=3D"EN-US" style=3D"font-size: 12.0pt; color: black;" data-mce-style=3D"fon=
t-size: 12.0pt; color: black;">v6ops &lt;</span><span style=3D"font-size: 1=
2.0pt; color: black;" data-mce-style=3D"font-size: 12.0pt; color: black;"><=
a href=3D"mailto:v6ops-bounces@ietf.org" target=3D"_blank"><span lang=3D"EN=
-US">v6ops-bounces@ietf.org</span></a></span><span lang=3D"EN-US" style=3D"=
font-size: 12.0pt; color: black;" data-mce-style=3D"font-size: 12.0pt; colo=
r: black;">&gt; en nombre de Lorenzo Colitti &lt;lorenzo=3D</span><span sty=
le=3D"font-size: 12.0pt; color: black;" data-mce-style=3D"font-size: 12.0pt=
; color: black;"><a href=3D"mailto:40google.com@dmarc.ietf.org" target=3D"_=
blank"><span lang=3D"EN-US">40google.com@dmarc.ietf.org</span></a></span><s=
pan lang=3D"EN-US" style=3D"font-size: 12.0pt; color: black;" data-mce-styl=
e=3D"font-size: 12.0pt; color: black;">&gt;<br><b>Fecha: </b>mi=C3=A9rcoles=
, 13 de junio de 2018, 4:45<br><b>Para: </b>&lt;jordi.palet=3D</span><span =
style=3D"font-size: 12.0pt; color: black;" data-mce-style=3D"font-size: 12.=
0pt; color: black;"><a href=3D"mailto:40consulintel.es@dmarc.ietf.org" targ=
et=3D"_blank"><span lang=3D"EN-US">40consulintel.es@dmarc.ietf.org</span></=
a></span><span lang=3D"EN-US" style=3D"font-size: 12.0pt; color: black;" da=
ta-mce-style=3D"font-size: 12.0pt; color: black;">&gt;<br><b>CC: </b>"</spa=
n><span style=3D"font-size: 12.0pt; color: black;" data-mce-style=3D"font-s=
ize: 12.0pt; color: black;"><a href=3D"mailto:v6ops@ietf.org" target=3D"_bl=
ank"><span lang=3D"EN-US">v6ops@ietf.org</span></a></span><span lang=3D"EN-=
US" style=3D"font-size: 12.0pt; color: black;" data-mce-style=3D"font-size:=
 12.0pt; color: black;"> WG" &lt;</span><span style=3D"font-size: 12.0pt; c=
olor: black;" data-mce-style=3D"font-size: 12.0pt; color: black;"><a href=
=3D"mailto:v6ops@ietf.org" target=3D"_blank"><span lang=3D"EN-US">v6ops@iet=
f.org</span></a></span><span lang=3D"EN-US" style=3D"font-size: 12.0pt; col=
or: black;" data-mce-style=3D"font-size: 12.0pt; color: black;">&gt;<br><b>=
Asunto: </b>Re: [v6ops] updating RFC8026 to support 464XLAT in draft-ietf-v=
6ops-transition-ipv4aas</span><span lang=3D"EN-US"></span></p></div><div><p=
 class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-a=
lt: auto; margin-left: 70.8pt;" data-mce-style=3D"mso-margin-top-alt: auto;=
 mso-margin-bottom-alt: auto; margin-left: 70.8pt;"><span lang=3D"EN-US">&n=
bsp;</span></p></div><div><div><div><p class=3D"MsoNormal" style=3D"mso-mar=
gin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt;" data-=
mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-=
left: 70.8pt;"><span lang=3D"EN-US">On Tue, Jun 12, 2018 at 7:40 PM JORDI P=
ALET MARTINEZ &lt;jordi.palet=3D</span><a href=3D"mailto:40consulintel.es@d=
marc.ietf.org" target=3D"_blank"><span lang=3D"EN-US">40consulintel..es@dma=
rc.ietf.org</span></a><span lang=3D"EN-US">&gt; wrote:</span></p></div><blo=
ckquote style=3D"border: none; border-left: solid #CCCCCC 1.0pt; padding: 0=
cm 0cm 0cm 6.0pt; margin: 5.0pt 0cm 5.0pt 4.8pt;" data-mce-style=3D"border:=
 none; border-left: solid #CCCCCC 1.0pt; padding: 0cm 0cm 0cm 6.0pt; margin=
: 5.0pt 0cm 5.0pt 4.8pt;"><div><div><p class=3D"MsoNormal" style=3D"mso-mar=
gin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt;" data-=
mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-=
left: 70.8pt;"><span lang=3D"EN-US">You don=E2=80=99t need RFC7050 neither =
DNS64, you can use PCP (RFC7225) to tell the CLAT the NAT64 prefix. It also=
 provides additional advantages to the operator to control many related asp=
ects (see section 3 of RFC7225).</span></p><p class=3D"MsoNormal" style=3D"=
mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt;=
" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; =
margin-left: 70.8pt;"><span lang=3D"EN-US">&nbsp;</span></p><p class=3D"Mso=
Normal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mar=
gin-left: 142.2pt;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-=
bottom-alt: auto; margin-left: 142.2pt;"><span lang=3D"EN-US">1.&nbsp;&nbsp=
;&nbsp;&nbsp;&nbsp;&nbsp; If the operator wants to enable 464xlat: they sho=
uld hand out a DNS64 to the CPE.</span></p><p class=3D"MsoNormal" style=3D"=
mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 142.2pt=
;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;=
 margin-left: 142.2pt;"><span lang=3D"EN-US">2.&nbsp;&nbsp;&nbsp;&nbsp;&nbs=
p;&nbsp; If the operator wants to disable&nbsp;464xlat: they should NOT han=
d out a DNS64 to the CPE.</span></p><p class=3D"MsoNormal" style=3D"mso-mar=
gin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt;" data-=
mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-=
left: 70.8pt;"><span lang=3D"EN-US">This doesn=E2=80=99t work, because the =
operator may be using RFC7225 instead of RFC7050. You need to try both in t=
hat case, and you aren=E2=80=99t providing a =E2=80=9Cpriority=E2=80=9D to =
a possible list of mechanisms, which is what RFC8026 does.</span></p></div>=
</div></blockquote><div><p class=3D"MsoNormal" style=3D"mso-margin-top-alt:=
 auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt;" data-mce-style=3D=
"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt=
;"><span lang=3D"EN-US">&nbsp;</span></p></div><div><p class=3D"MsoNormal" =
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left=
: 70.8pt;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-al=
t: auto; margin-left: 70.8pt;"><span lang=3D"EN-US">But it's the same probl=
em again: what's the use case for this DHCPv6 option? An operator that's us=
ing RFC7225 has an easy way to tell the CPE not to do 464xlat: don't hand o=
ut the prefix64 to those CPEs. So this is already possible today.</span></p=
></div><div><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-m=
argin-bottom-alt: auto; margin-left: 70.8pt;" data-mce-style=3D"mso-margin-=
top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt;"><span lan=
g=3D"EN-US">&nbsp;&nbsp;</span></p></div><blockquote style=3D"border: none;=
 border-left: solid #CCCCCC 1.0pt; padding: 0cm 0cm 0cm 6.0pt; margin: 5.0p=
t 0cm 5.0pt 4.8pt;" data-mce-style=3D"border: none; border-left: solid #CCC=
CCC 1.0pt; padding: 0cm 0cm 0cm 6.0pt; margin: 5.0pt 0cm 5.0pt 4.8pt;"><div=
><div><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-=
bottom-alt: auto; margin-left: 142.2pt;" data-mce-style=3D"mso-margin-top-a=
lt: auto; mso-margin-bottom-alt: auto; margin-left: 142.2pt;"><span lang=3D=
"EN-US">3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If the operator uses 464xlat=
, they should not allow the user to change the DNS server.</span></p><p cla=
ss=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: =
auto; margin-left: 70.8pt;" data-mce-style=3D"mso-margin-top-alt: auto; mso=
-margin-bottom-alt: auto; margin-left: 70.8pt;"><span lang=3D"EN-US">&nbsp;=
</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-ma=
rgin-bottom-alt: auto; margin-left: 70.8pt;" data-mce-style=3D"mso-margin-t=
op-alt: auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt;"><span lang=
=3D"EN-US">&nbsp;</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-=
alt: auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt;" data-mce-styl=
e=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 70=
.8pt;"><span lang=3D"EN-US">Let=E2=80=99s be realistic. You can=E2=80=99t =
=E2=80=9Cforce=E2=80=9D the customer to avoid changing the DNS =E2=80=A6</s=
pan></p></div></div></blockquote><div><p class=3D"MsoNormal" style=3D"mso-m=
argin-top-alt: auto; mso-margin-bottom-alt: auto; margin-left: 70.8pt;" dat=
a-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margi=
n-left: 70.8pt;"><span lang=3D"EN-US">&nbsp;</span></p></div><div><p class=
=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: au=
to; margin-left: 70..8pt;" data-mce-style=3D"mso-margin-top-alt: auto; mso-=
margin-bottom-alt: auto; margin-left: 70..8pt;"><span lang=3D"EN-US">On an =
operator-managed CPE, you can. On a user-managed CPE, you can't. But on suc=
h a CPE you probably shouldn't be disabling 464xlat. If the user wants to u=
se it, it's their CPE, right?</span></p></div></div></div><p class=3D"MsoNo=
rmal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; margi=
n-left: 70.8pt;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bot=
tom-alt: auto; margin-left: 70.8pt;"><span lang=3D"EN-US">_________________=
______________________________ v6ops mailing list </span><a href=3D"mailto:=
v6ops@ietf.org" target=3D"_blank"><span lang=3D"EN-US">v6ops@ietf..org</spa=
n></a> <a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" target=3D"_b=
lank"><span lang=3D"EN-US">https://www.ietf.org/mailman/listinfo/v6ops</spa=
n></a> <span lang=3D"EN-US"></span></p></div><p class=3D"MsoNormal" style=
=3D"mso-margin-top-alt: 0cm; margin-right: 0cm; margin-bottom: 12.0pt; marg=
in-left: 35.4pt;" data-mce-style=3D"mso-margin-top-alt: 0cm; margin-right: =
0cm; margin-bottom: 12.0pt; margin-left: 35.4pt;"><span lang=3D"EN-US"><br>=
**********************************************<br>IPv4 is over<br>Are you r=
eady for the new Internet ?<br></span><a href=3D"http://www.consulintel.es"=
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From: Alexandre Petrescu <alexandru.petrescu@gmail.com>
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Subject: [v6ops] Apple itunes is not on IPv6?
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The IETF meeting agenda offers apps for Android and iPhone.

It seems the iPhone app can not be accessed if connecting from a machine 
that does only IPv6 (Windows with IPv4 unchecked, on a cellular access 
network with PDP type IPv6).

https://itunes.apple.com/us/app/ietfers/id449400097?mt=8

If I check IPv4 back on on Windows, and connect to another cellular 
network with PDP type IPv4 (instead of IPv6) then that itunes link works ok.

Alex


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    <p><font size="-1"><font face="Courier New">The IETF meeting agenda
          offers apps for Android and iPhone.  <br>
        </font></font></p>
    <p><font size="-1"><font face="Courier New">It seems the iPhone app
          can not be accessed if connecting from a machine that does
          only IPv6 (Windows with IPv4 unchecked, on a cellular access
          network with PDP type IPv6).</font></font></p>
    <p><font size="-1"><font face="Courier New"><a class="moz-txt-link-freetext" href="https://itunes.apple.com/us/app/ietfers/id449400097?mt=8">https://itunes.apple.com/us/app/ietfers/id449400097?mt=8</a></font></font></p>
    <p><font size="-1"><font face="Courier New">If I check IPv4 back on
          on Windows, and connect to another cellular network with PDP
          type IPv4 (instead of IPv6) then that itunes link works ok.</font></font></p>
    <p><font size="-1"><font face="Courier New">Alex<br>
        </font></font></p>
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From: Alexandre Petrescu <alexandru.petrescu@gmail.com>
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Subject: Re: [v6ops] Apple itunes is on IPv6
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Sorry, talking to myself.

Yes itunes is on IPv6 and yes the agenda on apple devices is 
downloadable on IPv6

Earlier there was some other problem (may be some DNS issue or Windows 
http or so).

Alex

Le 13/06/2018 à 15:31, Alexandre Petrescu a écrit :
>
> The IETF meeting agenda offers apps for Android and iPhone.
>
> It seems the iPhone app can not be accessed if connecting from a 
> machine that does only IPv6 (Windows with IPv4 unchecked, on a 
> cellular access network with PDP type IPv6).
>
> https://itunes.apple.com/us/app/ietfers/id449400097?mt=8
>
> If I check IPv4 back on on Windows, and connect to another cellular 
> network with PDP type IPv4 (instead of IPv6) then that itunes link 
> works ok.
>
> Alex
>


--------------215EEC71A326611DDFCB40DB
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    <p><font size="-1"><font face="Courier New">Sorry, talking to
          myself.</font></font></p>
    <p><font size="-1"><font face="Courier New">Yes itunes is on IPv6
          and yes the agenda on apple devices is downloadable on IPv6</font></font></p>
    <p><font size="-1"><font face="Courier New">Earlier there was some other
          problem (may be some DNS issue or Windows http or so).<br>
        </font></font></p>
    <p><font size="-1"><font face="Courier New">Alex</font></font><br>
    </p>
    <div class="moz-cite-prefix">Le 13/06/2018 à 15:31, Alexandre
      Petrescu a écrit :<br>
    </div>
    <blockquote type="cite"
      cite="mid:f09e3508-e89f-760b-9228-04a4fd059015@gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=utf-8">
      <p><font size="-1"><font face="Courier New">The IETF meeting
            agenda offers apps for Android and iPhone.  <br>
          </font></font></p>
      <p><font size="-1"><font face="Courier New">It seems the iPhone
            app can not be accessed if connecting from a machine that
            does only IPv6 (Windows with IPv4 unchecked, on a cellular
            access network with PDP type IPv6).</font></font></p>
      <p><font size="-1"><font face="Courier New"><a
              class="moz-txt-link-freetext"
              href="https://itunes.apple.com/us/app/ietfers/id449400097?mt=8"
              moz-do-not-send="true">https://itunes.apple.com/us/app/ietfers/id449400097?mt=8</a></font></font></p>
      <p><font size="-1"><font face="Courier New">If I check IPv4 back
            on on Windows, and connect to another cellular network with
            PDP type IPv4 (instead of IPv6) then that itunes link works
            ok.</font></font></p>
      <p><font size="-1"><font face="Courier New">Alex<br>
          </font></font></p>
    </blockquote>
    <br>
  </body>
</html>

--------------215EEC71A326611DDFCB40DB--


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From: "Mudric, Dusan (Dusan)" <dmudric@avaya.com>
To: Mikael Abrahamsson <swmike@swm.pp.se>
CC: Richard Patterson <richard@helix.net.nz>, "v6ops@ietf.org list" <v6ops@ietf.org>
Thread-Topic: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-01.txt
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I expect the server to deliver the same prefix, if the client is using PD t=
o create the addresses. But I would not expect the server to offer the addr=
ess already in use, unless the server check the client identifier and is ab=
le to figure out which address is used by the client.

Dusan

> -----Original Message-----
> From: Mikael Abrahamsson [mailto:swmike@swm.pp.se]
> Sent: Wednesday, June 13, 2018 1:04 AM
> To: Mudric, Dusan (Dusan) <dmudric@avaya.com>
> Cc: Richard Patterson <richard@helix.net.nz>; v6ops@ietf.org list
> <v6ops@ietf.org>
> Subject: Re: [v6ops] New Version Notification for draft-patterson-intarea=
-
> ipoe-health-01.txt
>=20
> On Tue, 12 Jun 2018, Mudric, Dusan (Dusan) wrote:
>=20
> > lease. Considering the lease will not be RELEASE-d, the server will not
> > offer the lease for the new solicitation. The client should use Server
>=20
> Hm, I am not an DHCPv6 expert, but in my experience if I power off a
> device with an active lease, power it on again, it comes up again and doe=
s
> SOLICIT, it will get the same prefix back that it had before the power
> off (it does not provide any prefix information in the solicit).
>=20
> What am I missing here?
>=20
> --
> Mikael Abrahamsson    email: swmike@swm.pp.se


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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
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Subject: [v6ops] updating RFC8026 with draft-ietf-v6ops-transition-ipv4aas
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Hi all,



I'm sending this to Sotfwires and DHC WGs, in order to let know and seek review, but please keep the discussion only in v6ops which is responsible of this document



https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/



Here is the short summary of the reasons for the update.



In order to prioritize the different IPv4-as-a-Service (in IPv6-only networks) transition mechanisms (so the ISP can "agree" with each CPE which one to use or even if none), we are using RFC8026 (in short "a DHCPv6-Based Prioritization Mechanism for IPv4-in-IPv6 CPEs"), which was developed in softwires, but it is a DHCPv6 based mechanism.



The interesting issue is that because 464XLAT don't have an option code in RFC8026, it can't be ranked the same way, and ideally it should be, as we use also that in order to facilitate the operator to "manage" each transition mechanism status to be on/off (even to different customers).



So, what we do with this update, is adding that option code for 464XLAT to the existing ones and instruct IANA about that.



If you want to understand the suggested updated and how our algorithm works, you can read directly section 3.3, 7 and 10. Of course, inputs on the complete document are welcome!



Thanks!



Regards,

Jordi

 

 




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Subject: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Dear Lorenzo,

Thank you very much for your answer.

For a balanced view, I think it is useful to point out that the MAP 
protocols have their disadvantages, too.

_1. Port numbers_

As Jordi has already pointed it out, one needs to dedicate a fix number 
of ports per CPE. Some advice that a few hundred will do for this value, 
but I think that it is not so simple:
- The lack of port situation may cause serious problems in the operation 
of certain programs, for more information see [1].
- The port number consumption of different applications is highly 
varying and e.g. in the case of web browsing it depends on several 
factors [2].
- There may be several users behind a CPE, especially in the wired case 
(e.g. Internet is used by different members of a family simultaneously), 
thus sometimes even a few thousands may not be enough.

Stateful NAT64 (used by 464XLAT) can use port numbers (and thus public 
IP addresses) much more economically.

_2. Complexity and security_

The operation of the MAP solution is rather complex, now I give only 
some highlights. Let us consider MAP-T. (MAP-E works similarly, but it 
uses encapsulation.) "First, the MAP-T CE (Customer Edge) device 
performs a NAT44 operation to restrict the available TCP/UDP port 
numbers for the user.  Then the CE device performs a special stateless 
translation from IPv4 to IPv6, where the source IPv4 address and the 
selected port bits are encoded into the source IPv6 address according to 
the MAP-T rules. The IPv6 packets can be destined to other users, where 
similar CEs perform the necessary transformations, or to the outside 
IPv4 Internet, in which case the MAP-T Border Relay performs the 
necessary transformations." [3]

This complexity has performance and security implications:
- Whereas the IPv6 backbone traffic of 464XLAT is normal IPv6 traffic, 
which can be inspected e.g. by firewalls, the IPv6 backbone traffic of 
MAP-T (as well as that of MAP-E) needs to be first "decoded", which 
causes further costs (both CAPEX and OPEX).
-  Complex code may contain more bugs and thus also security holes. (In 
the simplest model, the number of bugs is proportional to the number of 
code lines.)

_3. MAP-T and MAP-E are different_

On the one hand, if double translation may cause the loss of some IPv4 
fields (BTW: What exactly did you mean?), then it is also applies for MAP-T.
On the other hand, MAP-E uses encapsulation, which results in an 
overhead. An IPv6 header is at least 40 bytes, which may be a 
significant overhead in the case of small packets, e.g. TCP acknowledgments.

_4. What other IPv6 transition solutions did you also consider?_

As you have now mentioned only MAP,  I wonder what other solutions you 
could consider better than 464XLAT?

Best regards,

Gábor Lencse

References:
[1] S. Miyakawa, "IPv4 to IPv6 transformation schemes", IEICE Trans. 
Commun., vol.E93-B, no.5, pp.1078-1084, May 2010. 
DOI:10.1587/transcom.E93.B.1078
[2] S. Répás, T. Hajas, and G. Lencse, "Port number consumption of the 
NAT64 IPv6 transition technology", Proc. 37th Internat. Conf. on 
Telecommunications and Signal Processing (TSP 2014), Berlin, Germany, 
pp.66-72, Jul. 1-3, 2014. DOI: 10.1109/TSP.2015.7296411
[3] G. Lencse, Y. Kadobayashi, "Comprehensive survey of IPv6 transition 
technologies for security analysis", unpublished

6/13/2018 12:55 PM keltezéssel, Lorenzo Colitti írta:
> Here are a few disadvantages of 464xlat:
>
>   * It consumes lots of state on the NAT64 (one state table entry for
>     every connection). MAP is much better since it uses port ranges.
>   * It doesn't allow any inbound connections unless the NAT
>     cooperates. MAP is better in the sense that you can at least
>     receive connections within your port range.
>   * The transformation is lossy because there are IPv4 header fields
>     that cannot be translated. MAP-E is better because the
>     encapsulation preserves the original packet header.
>
>
> On Wed, Jun 13, 2018 at 6:12 PM Lencse Gábor <lencse@hit.bme.hu 
> <mailto:lencse@hit.bme.hu>> wrote:
>
>     Dear Lorenzo,
>
>     I think it is a rather strong statement that "464XLAT is pretty
>     much the worse of the transition mechanisms from a technical
>     perspective."
>
>     We have listed 26+ IPv6 transition technologies in our workshop
>     paper [1], but there are even more solutions exist.
>
>     Which of them do you mean to be better than 464XLAT?
>
>     What technical points do you consider when stating that 464XLAT is
>     worse than the others? (E.g. resource consumption, scalability,
>     security, ease of implementation, etc.)
>
>     I think it is important for network operators to have a balanced
>     view of the advantages and disadvantages of the different IPv6
>     transition mechanisms, this is why I am asking these questions.
>
>     Best regards,
>
>     Gábor Lencse
>
>
>     [1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition
>     Technologies for Security Analysis", IEICE Communications Society
>     Internet Architecture Workshop, Tokyo, Japan, Aug. 28, 2017,
>     /IEICE Tech. Rep./, vol. 117, no. 187, pp. 19-24. Available
>     online:
>     http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf
>     <http://www.hit.bme.hu/%7Elencse/publications/IEICE-IA-2017-survey.pdf>
>
>
>     6/13/2018 9:38 AM keltezéssel, Lorenzo Colitti írta:
>>     That goes back to my earlier point of that from a technical
>>     perspective 464xlat is pretty much the worst of the transition
>>     mechanisms.. I don't think we should be recommending running it
>>     on wireline at all, let alone prioritizing it over something else
>>     .:-)
>>
>>     On Wed, Jun 13, 2018 at 3:50 PM JORDI PALET MARTINEZ
>>     <jordi.palet=40consulintel.es@dmarc.ietf.org
>>     <mailto:40consulintel.es@dmarc.ietf.org>> wrote:
>>
>>         Lorenzo, you’re missing the key aspect: Being able to
>>         prioritize, when an ISP supports several transition mechanisms.
>>
>>         RFC8026 key aspect is priority. If we don’t add an option
>>         code for 464XLAT, then it can’t be managed the same way.
>>
>>
>>         Regards,
>>
>>         Jordi
>>
>>         *De: *v6ops <v6ops-bounces@ietf.org
>>         <mailto:v6ops-bounces@ietf.org>> en nombre de Lorenzo Colitti
>>         <lorenzo=40google.com@dmarc.ietf.org
>>         <mailto:40google.com@dmarc.ietf.org>>
>>         *Fecha: *miércoles, 13 de junio de 2018, 4:45
>>         *Para: *<jordi.palet=40consulintel.es@dmarc.ietf.org
>>         <mailto:40consulintel.es@dmarc.ietf.org>>
>>         *CC: *"v6ops@ietf.org <mailto:v6ops@ietf.org> WG"
>>         <v6ops@ietf.org <mailto:v6ops@ietf.org>>
>>         *Asunto: *Re: [v6ops] updating RFC8026 to support 464XLAT in
>>         draft-ietf-v6ops-transition-ipv4aas
>>
>>         On Tue, Jun 12, 2018 at 7:40 PM JORDI PALET MARTINEZ
>>         <jordi.palet=40consulintel..es@dmarc.ietf.org
>>         <mailto:40consulintel.es@dmarc.ietf.org>> wrote:
>>
>>             You don’t need RFC7050 neither DNS64, you can use PCP
>>             (RFC7225) to tell the CLAT the NAT64 prefix. It also
>>             provides additional advantages to the operator to control
>>             many related aspects (see section 3 of RFC7225).
>>
>>             1.If the operator wants to enable 464xlat: they should
>>             hand out a DNS64 to the CPE.
>>
>>             2.If the operator wants to disable 464xlat: they should
>>             NOT hand out a DNS64 to the CPE.
>>
>>             This doesn’t work, because the operator may be using
>>             RFC7225 instead of RFC7050. You need to try both in that
>>             case, and you aren’t providing a “priority” to a possible
>>             list of mechanisms, which is what RFC8026 does.
>>
>>         But it's the same problem again: what's the use case for this
>>         DHCPv6 option? An operator that's using RFC7225 has an easy
>>         way to tell the CPE not to do 464xlat: don't hand out the
>>         prefix64 to those CPEs. So this is already possible today.
>>
>>             3.If the operator uses 464xlat, they should not allow the
>>             user to change the DNS server.
>>
>>             Let’s be realistic. You can’t “force” the customer to
>>             avoid changing the DNS …
>>
>>         On an operator-managed CPE, you can. On a user-managed CPE,
>>         you can't. But on such a CPE you probably shouldn't be
>>         disabling 464xlat. If the user wants to use it, it's their
>>         CPE, right?
>>
>>         _______________________________________________ v6ops mailing
>>         list v6ops@ietf.org <mailto:v6ops@ietf.org>
>>         https://www.ietf.org/mailman/listinfo/v6ops
>>
>>
>>         **********************************************
>>         IPv4 is over
>>         Are you ready for the new Internet ?
>>         http://www.consulintel.es
>>         The IPv6 Company
>>
>>         This electronic message contains information which may be
>>         privileged or confidential. The information is intended to be
>>         for the exclusive use of the individual(s) named above and
>>         further non-explicilty authorized disclosure, copying,
>>         distribution or use of the contents of this information, even
>>         if partially, including attached files, is strictly
>>         prohibited and will be considered a criminal offense. If you
>>         are not the intended recipient be aware that any disclosure,
>>         copying, distribution or use of the contents of this
>>         information, even if partially, including attached files, is
>>         strictly prohibited, will be considered a criminal offense,
>>         so you must reply to the original sender to inform about this
>>         communication and delete it.
>>
>>
>>
>>     _______________________________________________
>>     v6ops mailing list
>>     v6ops@ietf.org <mailto:v6ops@ietf.org>
>>     https://www.ietf.org/mailman/listinfo/v6ops
>
>     _______________________________________________
>     v6ops mailing list
>     v6ops@ietf.org <mailto:v6ops@ietf.org>
>     https://www.ietf.org/mailman/listinfo/v6ops
>


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    Dear Lorenzo,<br>
    <br>
    Thank you very much for your answer. <br>
    <br>
    For a balanced view, I think it is useful to point out that the MAP
    protocols have their disadvantages, too. <br>
    <br>
    <u>1. Port numbers</u><br>
    <br>
    As Jordi has already pointed it out, one needs to dedicate a fix
    number of ports per CPE. Some advice that a few hundred will do for
    this value, but I think that it is not so simple:<br>
    - The lack of port situation may cause serious problems in the
    operation of certain programs, for more information see [1].<br>
    - The port number consumption of different applications is highly
    varying and e.g. in the case of web browsing it depends on several
    factors [2].<br>
    - There may be several users behind a CPE, especially in the wired
    case (e.g. Internet is used by different members of a family
    simultaneously), thus sometimes even a few thousands may not be
    enough.<br>
    <br>
    Stateful NAT64 (used by 464XLAT) can use port numbers (and thus
    public IP addresses) much more economically.<br>
    <br>
    <u>2. Complexity and security</u><br>
    <br>
    The operation of the MAP solution is rather complex, now I give only
    some highlights. Let us consider MAP-T. (MAP-E works similarly, but
    it uses encapsulation.) "First, the MAP-T CE (Customer Edge) device
    performs a NAT44 operation to restrict the available TCP/UDP port
    numbers for the user.  Then the CE device performs a special
    stateless translation from IPv4 to IPv6, where the source IPv4
    address and the selected port bits are encoded into the source IPv6
    address according to the MAP-T rules. The IPv6 packets can be
    destined to other users, where similar CEs perform the necessary
    transformations, or to the outside IPv4 Internet, in which case the
    MAP-T Border Relay performs the necessary transformations." [3]<br>
    <br>
    This complexity has performance and security implications:<br>
    - Whereas the IPv6 backbone traffic of 464XLAT is normal IPv6
    traffic, which can be inspected e.g. by firewalls, the IPv6 backbone
    traffic of MAP-T (as well as that of MAP-E) needs to be first
    "decoded", which causes further costs (both CAPEX and OPEX). <br>
    -  Complex code may contain more bugs and thus also security holes.
    (In the simplest model, the number of bugs is proportional to the
    number of code lines.)<br>
    <br>
    <u>3. MAP-T and MAP-E are different</u><br>
    <br>
    On the one hand, if double translation may cause the loss of some
    IPv4 fields (BTW: What exactly did you mean?), then it is also
    applies for MAP-T.<br>
    On the other hand, MAP-E uses encapsulation, which results in an
    overhead. An IPv6 header is at least 40 bytes, which may be a
    significant overhead in the case of small packets, e.g. TCP
    acknowledgments.<br>
    <br>
    <u>4. What other IPv6 transition solutions did you also consider?</u><br>
    <br>
    As you have now mentioned only MAP,  I wonder what other solutions
    you could consider better than 464XLAT?<br>
    <br>
    Best regards,<br>
    <br>
    Gábor Lencse<br>
    <br>
    References:<br>
    [1] S. Miyakawa, "IPv4 to IPv6 transformation schemes", IEICE Trans.
    Commun., vol.E93-B, no.5, pp.1078-1084, May 2010.
    DOI:10.1587/transcom.E93.B.1078<br>
    [2] S. Répás, T. Hajas, and G. Lencse, "Port number consumption of
    the NAT64 IPv6 transition technology", Proc. 37th Internat. Conf. on
    Telecommunications and Signal Processing (TSP 2014), Berlin,
    Germany, pp.66-72, Jul. 1-3, 2014. DOI: 10.1109/TSP.2015.7296411<br>
    [3] G. Lencse, Y. Kadobayashi, "Comprehensive survey of IPv6
    transition technologies for security analysis", unpublished<br>
    <br>
    <div class="moz-cite-prefix">6/13/2018 12:55 PM keltezéssel, Lorenzo
      Colitti írta:<br>
    </div>
    <blockquote
cite="mid:CAKD1Yr3ZbOLbsXFmZqa78ZJ9aaiFnCxAPUVOX26=VoqChA1g-A@mail.gmail.com"
      type="cite">
      <div dir="ltr">Here are a few disadvantages of 464xlat:
        <div>
          <ul>
            <li>It consumes lots of state on the NAT64 (one state table
              entry for every connection). MAP is much better since it
              uses port ranges.<br>
            </li>
            <li>It doesn't allow any inbound connections unless the NAT
              cooperates. MAP is better in the sense that you can at
              least receive connections within your port range.</li>
            <li>The transformation is lossy because there are IPv4
              header fields that cannot be translated. MAP-E is better
              because the encapsulation preserves the original packet
              header.</li>
          </ul>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr">On Wed, Jun 13, 2018 at 6:12 PM Lencse Gábor &lt;<a
            moz-do-not-send="true" href="mailto:lencse@hit.bme.hu">lencse@hit.bme.hu</a>&gt;
          wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0 0 0
          .8ex;border-left:1px #ccc solid;padding-left:1ex">
          <div bgcolor="#FFFFFF" text="#000000"> Dear Lorenzo,<br>
            <br>
            I think it is a rather strong statement that "464XLAT is
            pretty much the worse of the transition mechanisms from a
            technical perspective."<br>
            <br>
            We have listed 26+ IPv6 transition technologies in our
            workshop paper [1], but there are even more solutions exist.
            <br>
            <br>
            Which of them do you mean to be better than 464XLAT?<br>
            <br>
            What technical points do you consider when stating that
            464XLAT is worse than the others? (E.g. resource
            consumption, scalability, security, ease of implementation,
            etc.)<br>
            <br>
            I think it is important for network operators to have a
            balanced view of the advantages and disadvantages of the
            different IPv6 transition mechanisms, this is why I am
            asking these questions.<br>
            <br>
            Best regards,<br>
            <br>
            Gábor Lencse<br>
            <br>
            <br>
            [1] G. Lencse and Y. Kadobayashi, "Survey of IPv6 Transition
            Technologies for Security Analysis", IEICE Communications
            Society Internet Architecture Workshop, Tokyo, Japan, Aug.
            28, 2017, <i>IEICE Tech. Rep.</i>, vol. 117, no. 187, pp.
            19-24. Available online: <a moz-do-not-send="true"
              class="m_-5273822808446840467moz-txt-link-freetext"
href="http://www.hit.bme.hu/%7Elencse/publications/IEICE-IA-2017-survey.pdf"
              target="_blank">http://www.hit.bme.hu/~lencse/publications/IEICE-IA-2017-survey.pdf</a><br>
            <br>
            <br>
            <div class="m_-5273822808446840467moz-cite-prefix">6/13/2018
              9:38 AM keltezéssel, Lorenzo Colitti írta:<br>
            </div>
            <blockquote type="cite">
              <div dir="ltr">That goes back to my earlier point of that
                from a technical perspective 464xlat is pretty much the
                worst of the transition mechanisms.. I don't think we
                should be recommending running it on wireline at all,
                let alone prioritizing it over something else .:-)</div>
              <br>
              <div class="gmail_quote">
                <div dir="ltr">On Wed, Jun 13, 2018 at 3:50 PM JORDI
                  PALET MARTINEZ &lt;jordi.palet=<a
                    moz-do-not-send="true"
                    href="mailto:40consulintel.es@dmarc.ietf.org"
                    target="_blank">40consulintel.es@dmarc.ietf.org</a>&gt;
                  wrote:<br>
                </div>
                <blockquote class="gmail_quote" style="margin:0 0 0
                  .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  <div link="blue" vlink="purple" lang="ES">
                    <div
                      class="m_-5273822808446840467m_-2528391801406928691WordSection1">
                      <p class="MsoNormal"><span lang="EN-US">Lorenzo,
                          you’re missing the key aspect: Being able to
                          prioritize, when an ISP supports several
                          transition mechanisms.</span></p>
                      <p class="MsoNormal"><span lang="EN-US"> </span></p>
                      <p class="MsoNormal"><span lang="EN-US">RFC8026
                          key aspect is priority. If we don’t add an
                          option code for 464XLAT, then it can’t be
                          managed the same way.</span></p>
                      <div>
                        <p class="MsoNormal"><span
                            style="font-size:10.5pt;color:black"
                            lang="EN-US"><br>
                          </span><span
                            style="font-size:10.5pt;color:black"
                            lang="ES-TRAD">Regards,</span></p>
                        <p class="MsoNormal"
                          style="margin-bottom:12.0pt"><span
                            style="font-size:10.5pt;color:black"
                            lang="ES-TRAD">Jordi</span></p>
                        <p class="MsoNormal"><span
                            style="font-size:10.5pt;color:black"
                            lang="ES-TRAD"> </span></p>
                      </div>
                      <p class="MsoNormal"><span lang="ES-TRAD"> </span></p>
                      <p class="MsoNormal"><span lang="ES-TRAD"> </span></p>
                      <div style="border:none;border-top:solid #b5c4df
                        1.0pt;padding:3.0pt 0cm 0cm 0cm">
                        <p class="MsoNormal" style="margin-left:35.4pt"><b><span
                              style="font-size:12.0pt;color:black">De: </span></b><span
                            style="font-size:12.0pt;color:black">v6ops
                            &lt;<a moz-do-not-send="true"
                              href="mailto:v6ops-bounces@ietf.org"
                              target="_blank">v6ops-bounces@ietf.org</a>&gt;
                            en nombre de Lorenzo Colitti &lt;lorenzo=<a
                              moz-do-not-send="true"
                              href="mailto:40google.com@dmarc.ietf.org"
                              target="_blank">40google.com@dmarc.ietf.org</a>&gt;<br>
                            <b>Fecha: </b>miércoles, 13 de junio de
                            2018, 4:45<br>
                            <b>Para: </b>&lt;jordi.palet=<a
                              moz-do-not-send="true"
                              href="mailto:40consulintel.es@dmarc.ietf.org"
                              target="_blank">40consulintel.es@dmarc.ietf.org</a>&gt;<br>
                            <b>CC: </b>"<a moz-do-not-send="true"
                              href="mailto:v6ops@ietf.org"
                              target="_blank">v6ops@ietf.org</a> WG"
                            &lt;<a moz-do-not-send="true"
                              href="mailto:v6ops@ietf.org"
                              target="_blank">v6ops@ietf.org</a>&gt;<br>
                            <b>Asunto: </b>Re: [v6ops] updating RFC8026
                            to support 464XLAT in
                            draft-ietf-v6ops-transition-ipv4aas</span></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="margin-left:35.4pt"> </p>
                      </div>
                      <div>
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt">On Tue, Jun 12,
                              2018 at 7:40 PM JORDI PALET MARTINEZ
                              &lt;jordi.palet=<a moz-do-not-send="true"
href="mailto:40consulintel.es@dmarc.ietf.org" target="_blank">40consulintel..es@dmarc.ietf.org</a>&gt;
                              wrote:</p>
                          </div>
                          <blockquote
                            style="border:none;border-left:solid #cccccc
                            1.0pt;padding:0cm 0cm 0cm
                            6.0pt;margin-left:4.8pt;margin-right:0cm">
                            <div>
                              <div>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt">You don’t
                                  need RFC7050 neither DNS64, you can
                                  use PCP (RFC7225) to tell the CLAT the
                                  NAT64 prefix. It also provides
                                  additional advantages to the operator
                                  to control many related aspects (see
                                  section 3 of RFC7225).</p>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt"><span
                                    lang="EN-US"> </span></p>
                                <p class="MsoNormal"
                                  style="margin-left:106.8pt"><span
                                    lang="EN-US">1.</span><span
                                    lang="EN-US">       </span><span
                                    lang="EN-US">If the operator wants
                                    to enable 464xlat: they should hand
                                    out a DNS64 to the CPE.</span></p>
                                <p class="MsoNormal"
                                  style="margin-left:106.8pt"><span
                                    lang="EN-US">2.</span><span
                                    lang="EN-US">       </span><span
                                    lang="EN-US">If the operator wants
                                    to disable 464xlat: they should NOT
                                    hand out a DNS64 to the CPE.</span></p>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt"><span
                                    lang="EN-US">This doesn’t work,
                                    because the operator may be using
                                    RFC7225 instead of RFC7050. You need
                                    to try both in that case, and you
                                    aren’t providing a “priority” to a
                                    possible list of mechanisms, which
                                    is what RFC8026 does.</span></p>
                              </div>
                            </div>
                          </blockquote>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt"> </p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt">But it's the
                              same problem again: what's the use case
                              for this DHCPv6 option? An operator that's
                              using RFC7225 has an easy way to tell the
                              CPE not to do 464xlat: don't hand out the
                              prefix64 to those CPEs. So this is already
                              possible today.</p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt">  </p>
                          </div>
                          <blockquote
                            style="border:none;border-left:solid #cccccc
                            1.0pt;padding:0cm 0cm 0cm
                            6.0pt;margin-left:4.8pt;margin-right:0cm">
                            <div>
                              <div>
                                <p class="MsoNormal"
                                  style="margin-left:106.8pt"><span
                                    lang="EN-US">3.</span><span
                                    lang="EN-US">       </span><span
                                    lang="EN-US">If the operator uses
                                    464xlat, they should not allow the
                                    user to change the DNS server.</span></p>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt"><span
                                    lang="EN-US"> </span></p>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt"><span
                                    lang="EN-US"> </span></p>
                                <p class="MsoNormal"
                                  style="margin-left:35.4pt"><span
                                    lang="EN-US">Let’s be realistic. You
                                    can’t “force” the customer to avoid
                                    changing the DNS …</span></p>
                              </div>
                            </div>
                          </blockquote>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt"> </p>
                          </div>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:35.4pt">On an
                              operator-managed CPE, you can. On a
                              user-managed CPE, you can't. But on such a
                              CPE you probably shouldn't be disabling
                              464xlat. If the user wants to use it, it's
                              their CPE, right?</p>
                          </div>
                        </div>
                      </div>
                      <p class="MsoNormal" style="margin-left:35.4pt">_______________________________________________
                        v6ops mailing list <a moz-do-not-send="true"
                          href="mailto:v6ops@ietf.org" target="_blank">v6ops@ietf.org</a>
                        <a moz-do-not-send="true"
                          href="https://www.ietf.org/mailman/listinfo/v6ops"
                          target="_blank">https://www.ietf.org/mailman/listinfo/v6ops</a>
                      </p>
                    </div>
                    <br>
                    **********************************************<br>
                    IPv4 is over<br>
                    Are you ready for the new Internet ?<br>
                    <a moz-do-not-send="true"
                      href="http://www.consulintel.es" target="_blank">http://www.consulintel.es</a><br>
                    The IPv6 Company<br>
                    <br>
                    This electronic message contains information which
                    may be privileged or confidential. The information
                    is intended to be for the exclusive use of the
                    individual(s) named above and further non-explicilty
                    authorized disclosure, copying, distribution or use
                    of the contents of this information, even if
                    partially, including attached files, is strictly
                    prohibited and will be considered a criminal
                    offense. If you are not the intended recipient be
                    aware that any disclosure, copying, distribution or
                    use of the contents of this information, even if
                    partially, including attached files, is strictly
                    prohibited, will be considered a criminal offense,
                    so you must reply to the original sender to inform
                    about this communication and delete it.<br>
                    <br>
                  </div>
                </blockquote>
              </div>
              <br>
              <fieldset
                class="m_-5273822808446840467mimeAttachmentHeader"></fieldset>
              <br>
              <pre>_______________________________________________
v6ops mailing list
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          _______________________________________________<br>
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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> For a balanced view, I think it is useful to point out that the MAP =
protocols have their disadvantages, too.
>=20
> 1. Port numbers
>=20
> As Jordi has already pointed it out, one needs to dedicate a fix =
number of ports per CPE. Some advice that a few hundred will do for this =
value, but I think that it is not so simple:
> - The lack of port situation may cause serious problems in the =
operation of certain programs, for more information see [1].
> - The port number consumption of different applications is highly =
varying and e.g. in the case of web browsing it depends on several =
factors [2].
> - There may be several users behind a CPE, especially in the wired =
case (e.g. Internet is used by different members of a family =
simultaneously), thus sometimes even a few thousands may not be enough.
>=20
> Stateful NAT64 (used by 464XLAT) can use port numbers (and thus public =
IP addresses) much more economically.

While that is correct, you can build endpoint dependent NATs that are =
extremely efficient when it comes to port utilisation.
(Reusing the same port for communication to different end systems).

> 2. Complexity and security
>=20
> The operation of the MAP solution is rather complex, now I give only =
some highlights. Let us consider MAP-T. (MAP-E works similarly, but it =
uses encapsulation.) "First, the MAP-T CE (Customer Edge) device =
performs a NAT44 operation to restrict the available TCP/UDP port =
numbers for the user.  Then the CE device performs a special stateless =
translation from IPv4 to IPv6, where the source IPv4 address and the =
selected port bits are encoded into the source IPv6 address according to =
the MAP-T rules. The IPv6 packets can be destined to other users, where =
similar CEs perform the necessary transformations, or to the outside =
IPv4 Internet, in which case the MAP-T Border Relay performs the =
necessary transformations." [3]
>=20
> This complexity has performance and security implications:
> - Whereas the IPv6 backbone traffic of 464XLAT is normal IPv6 traffic, =
which can be inspected e.g. by firewalls, the IPv6 backbone traffic of =
MAP-T (as well as that of MAP-E) needs to be first "decoded", which =
causes further costs (both CAPEX and OPEX).

This is incorrect. MAP-T IPv6 traffic is just as 'normal' as 464XLAT =
IPv6 packets.

> -  Complex code may contain more bugs and thus also security holes. =
(In the simplest model, the number of bugs is proportional to the number =
of code lines.)

On the PE side, stateful NAT64 is a lot more complex than any of the =
MAPs. While MAP-T is somewhat more complex (in number of lines of code) =
than MAP-E.
You have logging considerations as well as much more complex scaling. =
Scaling a MAP system is trivial. Scaling a stateful NAT system quickly =
requires state synchronisation between systems.

On the CPE side complexity is similar. NAT44 -> NAT46 or NAT44 -> =
tunnel. (Actually the 464XLAT case where even the second NAT is stateful =
is worse.

> 3. MAP-T and MAP-E are different
>=20
> On the one hand, if double translation may cause the loss of some IPv4 =
fields (BTW: What exactly did you mean?), then it is also applies for =
MAP-T.
> On the other hand, MAP-E uses encapsulation, which results in an =
overhead. An IPv6 header is at least 40 bytes, which may be a =
significant overhead in the case of small packets, e.g. TCP =
acknowledgments.

Yes. At the benefit of transparency and simplicity. 464XLAT/MAP-T adds =
20 bytes, encap another 20.
>=20
> 4. What other IPv6 transition solutions did you also consider?
>=20
> As you have now mentioned only MAP,  I wonder what other solutions you =
could consider better than 464XLAT?

Please don't call these IPv6 transition solutions.
These solutions are about keeping IPv4 alive a little longer.

The main "benefit" of 464XLAT is two-fold. It was lighter on =
provisioning than e.g. MAP-E or MAP-T and it could reuse a stateful =
NAT64, which could serve IPv6 only hosts reaching the IPv4 Internet.
How easy it is to provision 464XLAT or NAT64 to a CE device has in =
hindsight been shown to be arguable.

Cheers,
Ole

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From: "Bernie Volz (volz)" <volz@cisco.com>
To: JORDI PALET MARTINEZ <jordi.palet=40consulintel.es@dmarc.ietf.org>, "dhcwg@ietf.org" <dhcwg@ietf.org>, "softwires@ietf.org" <softwires@ietf.org>, "v6ops@ietf.org" <v6ops@ietf.org>
Thread-Topic: updating RFC8026 with draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] updating RFC8026 with draft-ietf-v6ops-transition-ipv4aas
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Hi Jordi:

Haven't look at the draft in detail yet, but I did find it rather odd that =
you are using option code 46. As these are DHCPv6 option codes, this maps t=
o:

Value 	Description 		Client ORO 	Singleton Option  	Reference
46	OPTION_CLT_TIME	No		Yes			[RFC5007]

I understand that you may have picked this simply because it is a nice numb=
er for v4/v6 transition mechanisms. But it seems like a rather odd mapping.

If you really think this is a wise thing to do, you should at least documen=
t that you are requesting this because of its value (and because it would n=
ever "really" be used for RFC 8026) - not that this OPTION_CLT_TIME option =
itself has any meaning.

It may be better to request that IANA assign a DHCPv6 option for this purpo=
se - which should otherwise never be requested by a client (or configured o=
n a server).

- Bernie

-----Original Message-----
From: dhcwg <dhcwg-bounces@ietf.org> On Behalf Of JORDI PALET MARTINEZ
Sent: Wednesday, June 13, 2018 12:46 PM
To: dhcwg@ietf.org; softwires@ietf.org; v6ops@ietf.org
Subject: [dhcwg] updating RFC8026 with draft-ietf-v6ops-transition-ipv4aas

Hi all,



I'm sending this to Sotfwires and DHC WGs, in order to let know and seek re=
view, but please keep the discussion only in v6ops which is responsible of =
this document



https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/



Here is the short summary of the reasons for the update.



In order to prioritize the different IPv4-as-a-Service (in IPv6-only networ=
ks) transition mechanisms (so the ISP can "agree" with each CPE which one t=
o use or even if none), we are using RFC8026 (in short "a DHCPv6-Based Prio=
ritization Mechanism for IPv4-in-IPv6 CPEs"), which was developed in softwi=
res, but it is a DHCPv6 based mechanism.



The interesting issue is that because 464XLAT don't have an option code in =
RFC8026, it can't be ranked the same way, and ideally it should be, as we u=
se also that in order to facilitate the operator to "manage" each transitio=
n mechanism status to be on/off (even to different customers).



So, what we do with this update, is adding that option code for 464XLAT to =
the existing ones and instruct IANA about that.



If you want to understand the suggested updated and how our algorithm works=
, you can read directly section 3.3, 7 and 10. Of course, inputs on the com=
plete document are welcome!



Thanks!



Regards,

Jordi

=20

=20




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To: "Bernie Volz (volz)" <volz=40cisco.com@dmarc.ietf.org>, "dhcwg@ietf.org" <dhcwg@ietf.org>, "softwires@ietf.org" <softwires@ietf.org>, "v6ops@ietf.org" <v6ops@ietf.org>
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Thread-Topic: [v6ops] updating RFC8026 with draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] updating RFC8026 with draft-ietf-v6ops-transition-ipv4aas
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Hi Bernie,



Thanks a lot for looking at this.



I may be wrong, but I think they are different "option codes" tables and sh=
ould not be a conflict.



If I'm wrong it means the RFC8026 table it's just a subset, which is confus=
ing when you look into the IANA web page, because looks like different tabl=
es ...



I was looking at https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-=
parameters.xhtml



There is a specific table for RFC8026 option codes:



Option Code 	S46 Mechanism 	Reference=20

64	DS-Lite	[RFC6334]

88	DHCPv4 over DHCPv6	[RFC7341]

94	MAP-E	[RFC7598]

95	MAP-T	[RFC7598]

96	Lightweight 4over6	[RFC7598]



This table right now is matching the RFC8026, as no other option codes have=
 been added after.



Those option codes (64, 88, etc.), also match other DHCPv6 option codes, in=
 the main table. In some cases, is very clear it has the same meaning, but =
in others I'm not sure ...



But of course, this is a minor detail, and as you say it looks like 46 (OPT=
ION_CLT_TIME) is something never will have a conflict with RFC8026, so we c=
an explicitly say that, or we can just ask IANA to assign whatever is the m=
ost convenient one. I'm fine either way.



Thanks!



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de "Bernie Volz (volz)" <volz=
=3D40cisco.com@dmarc.ietf.org>

Fecha: mi=C3=A9rcoles, 13 de junio de 2018, 23:02

Para: JORDI PALET MARTINEZ <jordi.palet=3D40consulintel.es@dmarc.ietf.org>,=
 "dhcwg@ietf.org" <dhcwg@ietf.org>, "softwires@ietf.org" <softwires@ietf.or=
g>, "v6ops@ietf.org" <v6ops@ietf.org>

Asunto: Re: [v6ops] updating RFC8026 with draft-ietf-v6ops-transition-ipv4a=
as



    Hi Jordi:

   =20

    Haven't look at the draft in detail yet, but I did find it rather odd t=
hat you are using option code 46. As these are DHCPv6 option codes, this ma=
ps to:

   =20

    Value 	Description 		Client ORO 	Singleton Option  	Reference

    46	OPTION_CLT_TIME	No		Yes			[RFC5007]

   =20

    I understand that you may have picked this simply because it is a nice =
number for v4/v6 transition mechanisms. But it seems like a rather odd mapp=
ing.

   =20

    If you really think this is a wise thing to do, you should at least doc=
ument that you are requesting this because of its value (and because it wou=
ld never "really" be used for RFC 8026) - not that this OPTION_CLT_TIME opt=
ion itself has any meaning.

   =20

    It may be better to request that IANA assign a DHCPv6 option for this p=
urpose - which should otherwise never be requested by a client (or configur=
ed on a server).

   =20

    - Bernie

   =20

    -----Original Message-----

    From: dhcwg <dhcwg-bounces@ietf.org> On Behalf Of JORDI PALET MARTINEZ

    Sent: Wednesday, June 13, 2018 12:46 PM

    To: dhcwg@ietf.org; softwires@ietf.org; v6ops@ietf.org

    Subject: [dhcwg] updating RFC8026 with draft-ietf-v6ops-transition-ipv4=
aas

   =20

    Hi all,

   =20

   =20

   =20

    I'm sending this to Sotfwires and DHC WGs, in order to let know and see=
k review, but please keep the discussion only in v6ops which is responsible=
 of this document

   =20

   =20

   =20

    https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/

   =20

   =20

   =20

    Here is the short summary of the reasons for the update.

   =20

   =20

   =20

    In order to prioritize the different IPv4-as-a-Service (in IPv6-only ne=
tworks) transition mechanisms (so the ISP can "agree" with each CPE which o=
ne to use or even if none), we are using RFC8026 (in short "a DHCPv6-Based =
Prioritization Mechanism for IPv4-in-IPv6 CPEs"), which was developed in so=
ftwires, but it is a DHCPv6 based mechanism.

   =20

   =20

   =20

    The interesting issue is that because 464XLAT don't have an option code=
 in RFC8026, it can't be ranked the same way, and ideally it should be, as =
we use also that in order to facilitate the operator to "manage" each trans=
ition mechanism status to be on/off (even to different customers).

   =20

   =20

   =20

    So, what we do with this update, is adding that option code for 464XLAT=
 to the existing ones and instruct IANA about that.

   =20

   =20

   =20

    If you want to understand the suggested updated and how our algorithm w=
orks, you can read directly section 3.3, 7 and 10. Of course, inputs on the=
 complete document are welcome!

   =20

   =20

   =20

    Thanks!

   =20

   =20

   =20

    Regards,

   =20

    Jordi

   =20

    =20

   =20

    =20

   =20

   =20

   =20

   =20

    **********************************************

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    The IPv6 Company

   =20

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**********************************************
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Are you ready for the new Internet ?
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The IPv6 Company

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From: "STARK, BARBARA H" <bs7652@att.com>
To: "v6ops@ietf.org WG" <v6ops@ietf.org>
Thread-Topic: [v6ops] MAP vs 464XLAT and request to updating RFC8026 to support 464XLAT
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Subject: Re: [v6ops] MAP vs 464XLAT and request to updating RFC8026 to support 464XLAT
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The justification presented for the request for a new DHCPv6 option 111 opt=
ion code for 464XLAT was that an operator would be running multiple IPv4aas=
 mechanisms and needed to express which they preferred a CE router to make =
use of. The discussion devolved into MAP vs. 464XLAT. The cases being made =
for 464XLAT vs MAP seemed to me to make a very strong case against deployin=
g multiple mechanisms.

Deploying multiple mechanisms has all the downsides of all the mechanisms. =
The only positive thing to say is that if the CE router supports one mechan=
ism, but not the other, then the CE router is still ok.

To me, this one positive aspect is such a weak reason, that I would never u=
se it to justify the additional capex, opex, and customer help desk costs.=
=20

Is there some better justification that I'm missing? If there is no good ju=
stification for deploying 464XLAT and MAP-T or MAP-E, then why is a DHCPv6 =
option 111 option code for 464XLAT needed?
Barbara


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From: Warren Kumari <warren@kumari.net>
Date: Wed, 13 Jun 2018 22:19:17 -0400
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To: Mark Andrews <marka@isc.org>
Cc: David Schinazi <dschinazi@apple.com>, Stuart Cheshire <cheshire@apple.com>, iana-questions@iana.org,  dnsop <dnsop@ietf.org>, IPv6 Operations <v6ops@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/GPWrzhfGfYWN4AlBxNukRJSZuug>
Subject: Re: [v6ops] [IANA #989438] ipv4only.arpa's delegation should be insecure.
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On Tue, Jun 12, 2018 at 11:16 PM Mark Andrews <marka@isc.org> wrote:

>
> > On 13 Jun 2018, at 12:28 pm, David Schinazi <dschinazi@apple.com> wrote=
:
> >
> > Hi everyone,
> >
> > Stuart and I have a draft that attempts to address these issues, please
> let us know if you think it does or doesn't.
> >
> > https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-dot-arpa
> >
> > Thanks,
> > David Schinazi
> >
>
> This does not meet my requirements.  There is zero need for any part of
> the normal DNS resolution
> process to know the IPV4ONLY.ARPA is special if IANA stopped signing the
> zone.  That would
> allow getaddrinfo() to be able to lookup up the AAAA records without any
> intermediate software
> having to special case IPV4ONLY.ARPA.  IPV4ONLY.ARPA would then validate
> as insecure rather
> than as secure as it currently does.
> =E2=80=8B
>

I'm not sure that I agree with you on that (let's ignore DNSSEC for now) --
there is little *technical* reason for the normal DNS resolution process to
know that ipv4only.arpa is special, but administrators sometimes install
ipv4only.arpa resolution locally (for disconnected networks, to improve
reliability (e.g when .arpa is slow), or when users are using non-local DNS
resolvers (like 8.8.8.8). This is not a technical thing, but rather a
blessing that NAT64 / DNS64 admins can do that -- personally this sounds
more like an argument for adding it to locally served zones not SUDN. What
am I missing here?

=E2=80=8B
>
> The document needs to explicitly state that the delegation for
> IPV4ONLY.ARPA in ARPA MUST
> be insecure (no DS record).
>
>
RFC7050 Section 7 says:
"A signed "ipv4only.arpa." allows validating
   DNS64 servers (see [RFC6147] Section 3, Case 5, for example) to
   detect malicious AAAA resource records.  Therefore, the zone serving
   the well-known name has to be protected with DNSSEC."

I read that a few times, and even when squinting I cannot figure out how
that is supposed to work. Can someone enlighten me? I can see how a signed
ipv4only.arpa allows a validating DNS64 server to validate the (well
known!) v4 addresses, but the malicious AAAA RR detection bit confuses me..=
.



> You then have other issues to deal with like not sending queries for
> IPV4ONLY.ARPA to servers
> which have DNS64 configured or have a local IPV4ONLY.ARPA zone.  These ar=
e
> similar to the issues
> for HOME.ARPA but are at the ISP rather than the CPE.
>
> One way to handle that would be for CPE to always use the DHCP/RA DNS
> servers for IPV4ONLY.ARPA
> and require a explicit override just for IPV4ONLY.ARPA.
>
> Another way would be for middle boxes to intercept queries but then you
> have to account for
> anti spoofing technology TSIG, DNS COOKIE etc.  DNS COOKIE just needs the
> delegated servers
> for IPV4ONLY.ARPA to not serve any other zones.  That way any DNS COOKIE
> state learnt for the
> IP addresses of the servers for IPV4ONLY.ARPA does not impact on
> IPV4ONLY.ARPA lookups.
>
> I mention TSIG because that could be used with a well known TSIG key to
> defeat fragmentation
> attacks and because TSIG can be used between clients and recursive server=
s
> that are not
> operated by the ISP.  This would be one case where DNS resolution softwar=
e
> may want to be
> altered by default.  This scenario is even rarer than DNSSEC.
>
> Mark
>

=E2=80=8BW
=E2=80=8B

>
> >> On Jun 12, 2018, at 18:29, Mark Andrews <marka@isc.org> wrote:
> >>
> >> The Domain Name Reservation Considerations in RFC 7050 do not cover
> whether
> >> a delegation should be signed or not.  Due to that omission in
> constructing the set
> >> of questions to be asked RFC 7050 fails when the client is behind a
> validating resolver
> >> that has NO SPECIAL KNOWLEDGE of IPV4ONLY.ARPA.
> >>
> >> There are 2 pieces of work that are required.
> >> 1) update the list of questions that need to be asked needs to include
> whether a delegation
> >>     needs to be signed or not.
> >> 2) update RFC 7050 to include explicit instructions to say DO NOT sign
> IPV4ONLY.ARPA.
> >>
> >> Item 1 is dnsop work as far as I can see.  Item 2, I think, should be
> v6ops work.
> >>
> >> HOME.ARPA is a example of a unsigned delegation.
> >> 10.IN-ADDR.ARPA is a example of a unsigned delegation.
> >>
> >> There is zero benefit in IPV4ONLY.ARPA being signed.  Its contents on
> the Internet
> >> are well known.  The contents with NAT64 in using are well known excep=
t
> for the
> >> AAAA query.  The answer to that query is *expected to change*.  That
> answer cannot
> >> be validated.
> >>
> >> Mark
> >>
> >>> Begin forwarded message:
> >>>
> >>> From: "Michelle Cotton via RT" <iana-questions@iana.org>
> >>> Subject: [IANA #989438] ipv4only.arpa's delegation should be insecure=
.
> >>> Date: 6 January 2018 at 8:45:10 am AEDT
> >>> To: marka@isc.org
> >>> Reply-To: iana-questions@iana.org
> >>>
> >>> Hello,
> >>>
> >>> Following up on a thread from the end of the year.  Who will bring
> this to the DNSOps working group?  Will someone notify us if there is an
> consensus on a conclusion of what needs to be done?
> >>>
> >>> Thanks in advance.
> >>>
> >>> --Michelle Cotton
> >>>
> >>>
> >>> On Sun Dec 10 22:40:29 2017, danwing@gmail.com wrote:
> >>>> I had replied to the errata. I agree it warrants additional
> >>>> discussion, and had also suggested same. Dnsops seems appropriate.
> >>>>
> >>>>
> >>>>
> >>>> The question is not to much where the attacker is, but what DNSSEC
> >>>> guarantee is provided. DNS64 imagines the client could do its own
> >>>> validation =E2=80=94 if it wanted.  To date, effectively zero client=
s seem to
> >>>> want to do their own DNSSEC validation.
> >>>>
> >>>> -d
> >>>>
> >>>>> On Dec 10, 2017, at 11:13 AM, Savolainen, Teemu (Nokia-TECH/Tampere=
)
> >>>>> <teemu.savolainen@nokia.com> wrote:
> >>>>>
> >>>>> Hi,
> >>>>>
> >>>>> Dan Wing seem to have moved to VMWare, but cc'ing him now with an
> >>>>> email address I found from an I-D..
> >>>>>
> >>>>> I'm not really following IETF nowadays, so I don't know if this has
> >>>>> been discussed.
> >>>>>
> >>>>> Also I'm not sure why ISPs couldn=E2=80=99t first verify the A resp=
onse's
> >>>>> validity and then generate AAAA response to the client as document.=
..
> >>>>> but I suppose it could be considered to be more proper action to
> >>>>> modify insecure responses than secure responses. I'm just worried
> >>>>> what happens if there's attacker between ISP and root, in which cas=
e
> >>>>> the IPv4 address part of the response could be modified by attacker
> >>>>> and then delivered to client in the ISP's synthetic AAAA record..
> >>>>>
> >>>>> So I cannot accept the errata straight away, but it should be
> >>>>> discussed with people who are more experts on this than I am.
> >>>>>
> >>>>> Best regards,
> >>>>>
> >>>>> Teemu
> >>>>>
> >>>>>
> >>>>> -----Original Message-----
> >>>>> From: Michelle Cotton via RT [mailto:iana-questions-
> >>>>> comment@iana.org]
> >>>>> Sent: 9. joulukuuta 2017 1:22
> >>>>> Cc: ietf@kuehlewind.net; spencerdawkins.ietf@gmail.com;
> >>>>> jouni.nospam@gmail.com; Savolainen, Teemu (Nokia-TECH/Tampere)
> >>>>> <teemu.savolainen@nokia.com>
> >>>>> Subject: [IANA #989438] ipv4only.arpa's delegation should be
> >>>>> insecure.
> >>>>>
> >>>>> Hello,
> >>>>>
> >>>>> Just checking to see if anyone had a chance to look at this.
> >>>>> Dan Wing's email addressed bounced (dwing@cisco.com).
> >>>>>
> >>>>> Thanks,
> >>>>> Michelle
> >>>>>
> >>>>>
> >>>>>
> >>>>>> On Tue Nov 28 14:43:00 2017, michelle.cotton wrote:
> >>>>>> Hello Authors and Area Directors,
> >>>>>>
> >>>>>> We have received a message pointing out an errata report that woul=
d
> >>>>>> modify the actions that were performed for RFC7050.
> >>>>>>
> >>>>>> https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc-
> >>>>>>
> 2Deditor.org_errata_eid5152&d=3DDwIGaQ&c=3DuilaK90D4TOVoH58JNXRgQ&r=3DIMD=
U0f3LtPMQf5XkZ06fNg&m=3DhjPiqrkJLcvBw1fuqRPXMX6h76vuapCYz_DxRRq7SkM&s=3DuCK=
CSggUUCCU7iPuRs-
> >>>>>> usGcL3T69Fia9gTOy4UQwhLk&e=3D
> >>>>>>
> >>>>>> Has this report been discussed?  Will the result be an approved
> >>>>>> errata
> >>>>>> report or a new RFC?
> >>>>>>
> >>>>>> Thanks in advance.
> >>>>>>
> >>>>>> Michelle Cotton
> >>>>>> Protocol Parameters Engagement Sr. Manager
> >>>>>
> >>>>>
> >>>>>
> >>>
> >>>
> >>>
> >>
> >> --
> >> Mark Andrews, ISC
> >> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> >> PHONE: +61 2 9871 4742              INTERNET: marka@isc.org
> >>
> >> _______________________________________________
> >> v6ops mailing list
> >> v6ops@ietf.org
> >> https://www.ietf.org/mailman/listinfo/v6ops
> >
>
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742              INTERNET: marka@isc.org
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>


--=20
I don't think the execution is relevant when it was obviously a bad idea in
the first place.
This is like putting rabid weasels in your pants, and later expressing
regret at having chosen those particular rabid weasels and that pair of
pants.
   ---maf

--00000000000027c26e056e90bc08
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:verdana,=
sans-serif"><br></div><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Tu=
e, Jun 12, 2018 at 11:16 PM Mark Andrews &lt;<a href=3D"mailto:marka@isc.or=
g">marka@isc.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex"><br>
&gt; On 13 Jun 2018, at 12:28 pm, David Schinazi &lt;<a href=3D"mailto:dsch=
inazi@apple.com" target=3D"_blank">dschinazi@apple.com</a>&gt; wrote:<br>
&gt; <br>
&gt; Hi everyone,<br>
&gt; <br>
&gt; Stuart and I have a draft that attempts to address these issues, pleas=
e let us know if you think it does or doesn&#39;t.<br>
&gt; <br>
&gt; <a href=3D"https://tools.ietf.org/html/draft-cheshire-sudn-ipv4only-do=
t-arpa" rel=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/dr=
aft-cheshire-sudn-ipv4only-dot-arpa</a><br>
&gt; <br>
&gt; Thanks,<br>
&gt; David Schinazi<br>
&gt; <br>
<br>
This does not meet my requirements.=C2=A0 There is zero need for any part o=
f the normal DNS resolution<br>
process to know the IPV4ONLY.ARPA is special if IANA stopped signing the zo=
ne.=C2=A0 That would<br>
allow getaddrinfo() to be able to lookup up the AAAA records without any in=
termediate software<br>
having to special case IPV4ONLY.ARPA.=C2=A0 IPV4ONLY.ARPA would then valida=
te as insecure rather<br>
than as secure as it currently does.<br>
<div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif;displa=
y:inline">=E2=80=8B</div></blockquote><div><br></div><div><div class=3D"gma=
il_default" style=3D"font-family:verdana,sans-serif">I&#39;m not sure that =
I agree with you on that (let&#39;s ignore DNSSEC for now) -- there is litt=
le *technical* reason for the normal DNS resolution process to know that ip=
v4only.arpa is special, but administrators sometimes install ipv4only.arpa =
resolution locally (for disconnected networks, to improve reliability (e.g =
when .arpa is slow), or when users are using non-local DNS resolvers (like =
8.8.8.8). This is not a technical thing, but rather a blessing that NAT64 /=
 DNS64 admins can do that -- personally this sounds more like an argument f=
or adding it to locally served zones not SUDN. What am I missing here?</div=
></div><div class=3D"gmail_default" style=3D"font-family:verdana,sans-serif=
"><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class=3D=
"gmail_default" style=3D"font-family:verdana,sans-serif;display:inline">=E2=
=80=8B</div><br>
The document needs to explicitly state that the delegation for IPV4ONLY.ARP=
A in ARPA MUST<br>
be insecure (no DS record).<br>
<br></blockquote><div><br></div><div><div class=3D"gmail_default" style=3D"=
font-family:verdana,sans-serif">RFC7050 Section 7 says:</div></div><div cla=
ss=3D"gmail_default"><span style=3D"font-family:verdana,sans-serif">&quot;<=
/span><font face=3D"verdana, sans-serif">A signed &quot;ipv4only.arpa.&quot=
; allows validating</font></div><div class=3D"gmail_default"><font face=3D"=
verdana, sans-serif">=C2=A0 =C2=A0DNS64 servers (see [RFC6147] Section 3, C=
ase 5, for example) to</font></div><div class=3D"gmail_default"><font face=
=3D"verdana, sans-serif">=C2=A0 =C2=A0detect malicious AAAA resource record=
s.=C2=A0 Therefore, the zone serving</font></div><div class=3D"gmail_defaul=
t"><font face=3D"verdana, sans-serif">=C2=A0 =C2=A0the well-known name has =
to be protected with DNSSEC.&quot;</font></div><div class=3D"gmail_default"=
><font face=3D"verdana, sans-serif"><br></font></div><div class=3D"gmail_de=
fault"><font face=3D"verdana, sans-serif">I read that a few times, and even=
 when squinting=C2=A0I cannot figure out how that is supposed to work. Can =
someone enlighten me? I can see how a signed ipv4only.arpa allows a validat=
ing DNS64 server to validate the (well known!) v4 addresses, but the malici=
ous AAAA RR detection bit confuses me...</font></div><div class=3D"gmail_de=
fault"><font face=3D"verdana, sans-serif"><br></font></div><div>=C2=A0</div=
><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border=
-left:1px solid rgb(204,204,204);padding-left:1ex">
You then have other issues to deal with like not sending queries for IPV4ON=
LY.ARPA to servers<br>
which have DNS64 configured or have a local IPV4ONLY.ARPA zone.=C2=A0 These=
 are similar to the issues<br>
for HOME.ARPA but are at the ISP rather than the CPE.<br>
<br>
One way to handle that would be for CPE to always use the DHCP/RA DNS serve=
rs for IPV4ONLY.ARPA<br>
and require a explicit override just for IPV4ONLY.ARPA.<br>
<br>
Another way would be for middle boxes to intercept queries but then you hav=
e to account for<br>
anti spoofing technology TSIG, DNS COOKIE etc.=C2=A0 DNS COOKIE just needs =
the delegated servers<br>
for IPV4ONLY.ARPA to not serve any other zones.=C2=A0 That way any DNS COOK=
IE state learnt for the<br>
IP addresses of the servers for IPV4ONLY.ARPA does not impact on IPV4ONLY.A=
RPA lookups.<br>
<br>
I mention TSIG because that could be used with a well known TSIG key to def=
eat fragmentation<br>
attacks and because TSIG can be used between clients and recursive servers =
that are not<br>
operated by the ISP.=C2=A0 This would be one case where DNS resolution soft=
ware may want to be<br>
altered by default.=C2=A0 This scenario is even rarer than DNSSEC.<br>
<br>
Mark<br></blockquote><div><br></div><div class=3D"gmail_default" style=3D"f=
ont-family:verdana,sans-serif">=E2=80=8BW</div><div class=3D"gmail_default"=
 style=3D"font-family:verdana,sans-serif">=E2=80=8B</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex">
<br>
&gt;&gt; On Jun 12, 2018, at 18:29, Mark Andrews &lt;<a href=3D"mailto:mark=
a@isc.org" target=3D"_blank">marka@isc.org</a>&gt; wrote:<br>
&gt;&gt; <br>
&gt;&gt; The Domain Name Reservation Considerations in RFC 7050 do not cove=
r whether<br>
&gt;&gt; a delegation should be signed or not.=C2=A0 Due to that omission i=
n constructing the set<br>
&gt;&gt; of questions to be asked RFC 7050 fails when the client is behind =
a validating resolver<br>
&gt;&gt; that has NO SPECIAL KNOWLEDGE of IPV4ONLY.ARPA.<br>
&gt;&gt; <br>
&gt;&gt; There are 2 pieces of work that are required.<br>
&gt;&gt; 1) update the list of questions that need to be asked needs to inc=
lude whether a delegation<br>
&gt;&gt;=C2=A0 =C2=A0 =C2=A0needs to be signed or not.<br>
&gt;&gt; 2) update RFC 7050 to include explicit instructions to say DO NOT =
sign IPV4ONLY.ARPA.<br>
&gt;&gt; <br>
&gt;&gt; Item 1 is dnsop work as far as I can see.=C2=A0 Item 2, I think, s=
hould be v6ops work.<br>
&gt;&gt; <br>
&gt;&gt; HOME.ARPA is a example of a unsigned delegation.<br>
&gt;&gt; 10.IN-ADDR.ARPA is a example of a unsigned delegation.<br>
&gt;&gt; <br>
&gt;&gt; There is zero benefit in IPV4ONLY.ARPA being signed.=C2=A0 Its con=
tents on the Internet<br>
&gt;&gt; are well known.=C2=A0 The contents with NAT64 in using are well kn=
own except for the<br>
&gt;&gt; AAAA query.=C2=A0 The answer to that query is *expected to change*=
.=C2=A0 That answer cannot<br>
&gt;&gt; be validated.<br>
&gt;&gt; <br>
&gt;&gt; Mark<br>
&gt;&gt; <br>
&gt;&gt;&gt; Begin forwarded message:<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; From: &quot;Michelle Cotton via RT&quot; &lt;<a href=3D"mailto=
:iana-questions@iana.org" target=3D"_blank">iana-questions@iana.org</a>&gt;=
<br>
&gt;&gt;&gt; Subject: [IANA #989438] ipv4only.arpa&#39;s delegation should =
be insecure.<br>
&gt;&gt;&gt; Date: 6 January 2018 at 8:45:10 am AEDT<br>
&gt;&gt;&gt; To: <a href=3D"mailto:marka@isc.org" target=3D"_blank">marka@i=
sc.org</a><br>
&gt;&gt;&gt; Reply-To: <a href=3D"mailto:iana-questions@iana.org" target=3D=
"_blank">iana-questions@iana.org</a><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Hello,<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Following up on a thread from the end of the year.=C2=A0 Who w=
ill bring this to the DNSOps working group?=C2=A0 Will someone notify us if=
 there is an consensus on a conclusion of what needs to be done?<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Thanks in advance.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; --Michelle Cotton<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; On Sun Dec 10 22:40:29 2017, <a href=3D"mailto:danwing@gmail.c=
om" target=3D"_blank">danwing@gmail.com</a> wrote:<br>
&gt;&gt;&gt;&gt; I had replied to the errata. I agree it warrants additiona=
l<br>
&gt;&gt;&gt;&gt; discussion, and had also suggested same. Dnsops seems appr=
opriate.<br>
&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt; The question is not to much where the attacker is, but wha=
t DNSSEC<br>
&gt;&gt;&gt;&gt; guarantee is provided. DNS64 imagines the client could do =
its own<br>
&gt;&gt;&gt;&gt; validation =E2=80=94 if it wanted.=C2=A0 To date, effectiv=
ely zero clients seem to<br>
&gt;&gt;&gt;&gt; want to do their own DNSSEC validation.<br>
&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt; -d<br>
&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; On Dec 10, 2017, at 11:13 AM, Savolainen, Teemu (Nokia=
-TECH/Tampere)<br>
&gt;&gt;&gt;&gt;&gt; &lt;<a href=3D"mailto:teemu.savolainen@nokia.com" targ=
et=3D"_blank">teemu.savolainen@nokia.com</a>&gt; wrote:<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; Hi,<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; Dan Wing seem to have moved to VMWare, but cc&#39;ing =
him now with an<br>
&gt;&gt;&gt;&gt;&gt; email address I found from an I-D..<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; I&#39;m not really following IETF nowadays, so I don&#=
39;t know if this has<br>
&gt;&gt;&gt;&gt;&gt; been discussed.<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; Also I&#39;m not sure why ISPs couldn=E2=80=99t first =
verify the A response&#39;s<br>
&gt;&gt;&gt;&gt;&gt; validity and then generate AAAA response to the client=
 as document...<br>
&gt;&gt;&gt;&gt;&gt; but I suppose it could be considered to be more proper=
 action to<br>
&gt;&gt;&gt;&gt;&gt; modify insecure responses than secure responses. I&#39=
;m just worried<br>
&gt;&gt;&gt;&gt;&gt; what happens if there&#39;s attacker between ISP and r=
oot, in which case<br>
&gt;&gt;&gt;&gt;&gt; the IPv4 address part of the response could be modifie=
d by attacker<br>
&gt;&gt;&gt;&gt;&gt; and then delivered to client in the ISP&#39;s syntheti=
c AAAA record..<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; So I cannot accept the errata straight away, but it sh=
ould be<br>
&gt;&gt;&gt;&gt;&gt; discussed with people who are more experts on this tha=
n I am.<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; Best regards,<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; Teemu<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; -----Original Message-----<br>
&gt;&gt;&gt;&gt;&gt; From: Michelle Cotton via RT [mailto:<a href=3D"mailto=
:iana-questions-" target=3D"_blank">iana-questions-</a><br>
&gt;&gt;&gt;&gt;&gt; <a href=3D"mailto:comment@iana.org" target=3D"_blank">=
comment@iana.org</a>]<br>
&gt;&gt;&gt;&gt;&gt; Sent: 9. joulukuuta 2017 1:22<br>
&gt;&gt;&gt;&gt;&gt; Cc: <a href=3D"mailto:ietf@kuehlewind.net" target=3D"_=
blank">ietf@kuehlewind.net</a>; <a href=3D"mailto:spencerdawkins.ietf@gmail=
.com" target=3D"_blank">spencerdawkins.ietf@gmail.com</a>;<br>
&gt;&gt;&gt;&gt;&gt; <a href=3D"mailto:jouni.nospam@gmail.com" target=3D"_b=
lank">jouni.nospam@gmail.com</a>; Savolainen, Teemu (Nokia-TECH/Tampere)<br=
>
&gt;&gt;&gt;&gt;&gt; &lt;<a href=3D"mailto:teemu.savolainen@nokia.com" targ=
et=3D"_blank">teemu.savolainen@nokia.com</a>&gt;<br>
&gt;&gt;&gt;&gt;&gt; Subject: [IANA #989438] ipv4only.arpa&#39;s delegation=
 should be<br>
&gt;&gt;&gt;&gt;&gt; insecure.<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; Hello,<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; Just checking to see if anyone had a chance to look at=
 this.<br>
&gt;&gt;&gt;&gt;&gt; Dan Wing&#39;s email addressed bounced (<a href=3D"mai=
lto:dwing@cisco.com" target=3D"_blank">dwing@cisco.com</a>).<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; Thanks,<br>
&gt;&gt;&gt;&gt;&gt; Michelle<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt;&gt; On Tue Nov 28 14:43:00 2017, michelle.cotton wrote=
:<br>
&gt;&gt;&gt;&gt;&gt;&gt; Hello Authors and Area Directors,<br>
&gt;&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt;&gt; We have received a message pointing out an errata =
report that would<br>
&gt;&gt;&gt;&gt;&gt;&gt; modify the actions that were performed for RFC7050=
.<br>
&gt;&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt;&gt; <a href=3D"https://urldefense.proofpoint.com/v2/ur=
l?u=3Dhttps-3A__www.rfc-" rel=3D"noreferrer" target=3D"_blank">https://urld=
efense.proofpoint.com/v2/url?u=3Dhttps-3A__www.rfc-</a><br>
&gt;&gt;&gt;&gt;&gt;&gt; 2Deditor.org_errata_eid5152&amp;d=3DDwIGaQ&amp;c=
=3DuilaK90D4TOVoH58JNXRgQ&amp;r=3DIMDU0f3LtPMQf5XkZ06fNg&amp;m=3DhjPiqrkJLc=
vBw1fuqRPXMX6h76vuapCYz_DxRRq7SkM&amp;s=3DuCKCSggUUCCU7iPuRs-<br>
&gt;&gt;&gt;&gt;&gt;&gt; usGcL3T69Fia9gTOy4UQwhLk&amp;e=3D<br>
&gt;&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt;&gt; Has this report been discussed?=C2=A0 Will the res=
ult be an approved<br>
&gt;&gt;&gt;&gt;&gt;&gt; errata<br>
&gt;&gt;&gt;&gt;&gt;&gt; report or a new RFC?<br>
&gt;&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt;&gt; Thanks in advance.<br>
&gt;&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt;&gt; Michelle Cotton<br>
&gt;&gt;&gt;&gt;&gt;&gt; Protocol Parameters Engagement Sr. Manager<br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt; <br>
&gt;&gt; -- <br>
&gt;&gt; Mark Andrews, ISC<br>
&gt;&gt; 1 Seymour St., Dundas Valley, NSW 2117, Australia<br>
&gt;&gt; PHONE: +61 2 9871 4742=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 INTERNET: <a href=3D"mailto:marka@isc.org" target=3D"_blank">marka@i=
sc.org</a><br>
&gt;&gt; <br>
&gt;&gt; _______________________________________________<br>
&gt;&gt; v6ops mailing list<br>
&gt;&gt; <a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6ops@ietf.org=
</a><br>
&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" rel=3D"nor=
eferrer" target=3D"_blank">https://www.ietf.org/mailman/listinfo/v6ops</a><=
br>
&gt; <br>
<br>
-- <br>
Mark Andrews, ISC<br>
1 Seymour St., Dundas Valley, NSW 2117, Australia<br>
PHONE: +61 2 9871 4742=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 INTE=
RNET: <a href=3D"mailto:marka@isc.org" target=3D"_blank">marka@isc.org</a><=
br>
<br>
_______________________________________________<br>
v6ops mailing list<br>
<a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6ops@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/v6ops</a><br>
</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
 class=3D"gmail_signature">I don&#39;t think the execution is relevant when=
 it was obviously a bad idea in the first place.<br>This is like putting ra=
bid weasels in your pants, and later expressing regret at having chosen tho=
se particular rabid weasels and that pair of pants.<br>=C2=A0 =C2=A0---maf<=
/div></div>

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Thu, 14 Jun 2018 11:37:03 +0900
Message-ID: <CAKD1Yr3mieXkdQ6xyx5qJJyu4q=z0MVL5ZE-nAJ5wmjS1LOcAQ@mail.gmail.com>
To: "BARBARA H (ATTLABS) STARK" <bs7652@att.com>
Cc: "v6ops@ietf.org WG" <v6ops@ietf.org>
Content-Type: multipart/alternative; boundary="000000000000445124056e90fa22"
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/lOnQFSeWym7OK5AYYmFyR3HvZd0>
Subject: Re: [v6ops] MAP vs 464XLAT and request to updating RFC8026 to support 464XLAT
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On Thu, Jun 14, 2018 at 10:16 AM STARK, BARBARA H <bs7652@att.com> wrote:

> The justification presented for the request for a new DHCPv6 option 111
> option code for 464XLAT was that an operator would be running multiple
> IPv4aas mechanisms and needed to express which they preferred a CE router
> to make use of. The discussion devolved into MAP vs. 464XLAT. The cases
> being made for 464XLAT vs MAP seemed to me to make a very strong case
> against deploying multiple mechanisms.
>
> Deploying multiple mechanisms has all the downsides of all the mechanisms.


Absolutely. Not just the downsides of all of them, but the cost of
implementing all of them, and the increased operational burden of managing
all of them at the same time, and the increased operational burden of
managing the interaction between multiple mechanisms implemented by the
same device.

To me, this one positive aspect is such a weak reason, that I would never
> use it to justify the additional capex, opex, and customer help desk
> costs.


+1.

--000000000000445124056e90fa22
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<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu, Jun 14=
, 2018 at 10:16 AM STARK, BARBARA H &lt;<a href=3D"mailto:bs7652@att.com">b=
s7652@att.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The ju=
stification presented for the request for a new DHCPv6 option 111 option co=
de for 464XLAT was that an operator would be running multiple IPv4aas mecha=
nisms and needed to express which they preferred a CE router to make use of=
. The discussion devolved into MAP vs. 464XLAT. The cases being made for 46=
4XLAT vs MAP seemed to me to make a very strong case against deploying mult=
iple mechanisms.<br>
<br>
Deploying multiple mechanisms has all the downsides of all the mechanisms. =
</blockquote><div><br></div><div>Absolutely. Not just the downsides of all =
of them, but the cost of implementing all of them, and the increased operat=
ional burden of managing all of them at the same time, and the increased op=
erational burden of managing the interaction between multiple mechanisms im=
plemented by the same device.</div><div><br></div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex">To me, this one positive aspect is such a weak reason, that I would n=
ever use it to justify the additional capex, opex, and customer help desk c=
osts.=C2=A0=C2=A0</blockquote><div><br></div><div>+1.=C2=A0</div></div></di=
v>

--000000000000445124056e90fa22--


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Date: Thu, 14 Jun 2018 05:41:47 +0200 (CEST)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: "Mudric, Dusan (Dusan)" <dmudric@avaya.com>
cc: Richard Patterson <richard@helix.net.nz>,  "v6ops@ietf.org list" <v6ops@ietf.org>
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Subject: Re: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-01.txt
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Why would it not check the client identifier?

On Wed, 13 Jun 2018, Mudric, Dusan (Dusan) wrote:

> I expect the server to deliver the same prefix, if the client is using 
> PD to create the addresses. But I would not expect the server to offer 
> the address already in use, unless the server check the client 
> identifier and is able to figure out which address is used by the 
> client.
>
> Dusan
>
>> -----Original Message-----
>> From: Mikael Abrahamsson [mailto:swmike@swm.pp.se]
>> Sent: Wednesday, June 13, 2018 1:04 AM
>> To: Mudric, Dusan (Dusan) <dmudric@avaya.com>
>> Cc: Richard Patterson <richard@helix.net.nz>; v6ops@ietf.org list
>> <v6ops@ietf.org>
>> Subject: Re: [v6ops] New Version Notification for draft-patterson-intarea-
>> ipoe-health-01.txt
>>
>> On Tue, 12 Jun 2018, Mudric, Dusan (Dusan) wrote:
>>
>>> lease. Considering the lease will not be RELEASE-d, the server will not
>>> offer the lease for the new solicitation. The client should use Server
>>
>> Hm, I am not an DHCPv6 expert, but in my experience if I power off a
>> device with an active lease, power it on again, it comes up again and does
>> SOLICIT, it will get the same prefix back that it had before the power
>> off (it does not provide any prefix information in the solicit).
>>
>> What am I missing here?
>>
>> --
>> Mikael Abrahamsson    email: swmike@swm.pp.se
>

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se


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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: "STARK, BARBARA H" <bs7652@att.com>, "v6ops@ietf.org WG" <v6ops@ietf.org>
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Thread-Topic: [v6ops] MAP vs 464XLAT and request to updating RFC8026 to support 464XLAT
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Subject: Re: [v6ops] MAP vs 464XLAT and request to updating RFC8026 to support 464XLAT
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Hi Barbara,



This change in our draft was done to respond to your requirement (and also =
Richard ones) that an operator moving from "different" scenarios (for examp=
le from dual-stack to a "transition-mechanism-1" then to "transition-mechan=
ism-2" or to both of them for different customers) has the control over the=
 CE transition mechanisms, and that can be done not for all the customers, =
but in groups or whatever.



If all the CE supported transition mechanisms have the same DHCP "way" to b=
e prioritized and that can be used to turn each on/off, we satisfy your req=
uirement. Otherwise we need to take the decision in the document about how =
to prioritize *all* them, which may be good for us, but may be not the corr=
ect way for other operators later on.



We have not changed the requirements to say that all the mechanisms must be=
 supported, but if you support them, the logic way to do so is having the 4=
64XLAT option, which is the only one missing (because RFC8026 was develop c=
onsidering only the softwires WG mechanisms, and 464XLAT was done in v6ops)=
.



I still believe that it is a decision of each operator to support one or se=
veral transition mechanisms and which ones, but we need to have a CE that c=
an accommodate that in a managed way, and that's why RFC8026 was done.



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de "STARK, BARBARA H" <bs7652@=
att.com>

Fecha: jueves, 14 de junio de 2018, 3:16

Para: "v6ops@ietf.org WG" <v6ops@ietf.org>

Asunto: Re: [v6ops] MAP vs 464XLAT and request to updating RFC8026 to suppo=
rt 464XLAT



    The justification presented for the request for a new DHCPv6 option 111=
 option code for 464XLAT was that an operator would be running multiple IPv=
4aas mechanisms and needed to express which they preferred a CE router to m=
ake use of. The discussion devolved into MAP vs. 464XLAT. The cases being m=
ade for 464XLAT vs MAP seemed to me to make a very strong case against depl=
oying multiple mechanisms.

   =20

    Deploying multiple mechanisms has all the downsides of all the mechanis=
ms. The only positive thing to say is that if the CE router supports one me=
chanism, but not the other, then the CE router is still ok.

   =20

    To me, this one positive aspect is such a weak reason, that I would nev=
er use it to justify the additional capex, opex, and customer help desk cos=
ts.=20

   =20

    Is there some better justification that I'm missing? If there is no goo=
d justification for deploying 464XLAT and MAP-T or MAP-E, then why is a DHC=
Pv6 option 111 option code for 464XLAT needed?

    Barbara

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/66oqyJ7g43IsdlMDlF7qD0AiigY>
Subject: Re: [v6ops] MAP vs 464XLAT and request to updating RFC8026 to support 464XLAT
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I must disagree with this reasoning.

First of all, having the option does not mandate any ISP to use multiple 
transition mechanisms.

However, there may be situations, when multiple transition mechanisms 
are being used. Let me give you just two simple examples.

1. An ISP decides to change from one mechanism to another. (As we have 
just seen, 464XLAT, MAP-T and MAP-E have different advantages and 
drawback, thus this can be a rational decision.) The change may last for 
a while. (E.g. the new subscribers get the new technology and the old 
subscribers are moved in one year time frame.) Therefore the two 
mechanisms must coexist in the network of the ISP.

2. An ISP buys up another one and the two networks use two different 
mechanisms for providing IPv4 as a service. As both infrastructures are 
ready, it may be a rational decision to keep up both and move some users 
between them. (E.g. move MAP users, who complained about lack of port 
situation, to 464XLAT.)

So, IMHO, it is useful to have the option to choose among the different 
mechanisms.

Best regard,

Gábor Lencse


On 6/14/2018 4:37 AM, Lorenzo Colitti wrote:
> On Thu, Jun 14, 2018 at 10:16 AM STARK, BARBARA H <bs7652@att.com 
> <mailto:bs7652@att.com>> wrote:
>
>     The justification presented for the request for a new DHCPv6
>     option 111 option code for 464XLAT was that an operator would be
>     running multiple IPv4aas mechanisms and needed to express which
>     they preferred a CE router to make use of.. The discussion
>     devolved into MAP vs. 464XLAT. The cases being made for 464XLAT vs
>     MAP seemed to me to make a very strong case against deploying
>     multiple mechanisms.
>
>     Deploying multiple mechanisms has all the downsides of all the
>     mechanisms. 
>
>
> Absolutely. Not just the downsides of all of them, but the cost of 
> implementing all of them, and the increased operational burden of 
> managing all of them at the same time, and the increased operational 
> burden of managing the interaction between multiple mechanisms 
> implemented by the same device.
>
>     To me, this one positive aspect is such a weak reason, that I
>     would never use it to justify the additional capex, opex, and
>     customer help desk costs. 
>
>
> +1.
>
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


--------------176F18D9F66A59C90E5BB699
Content-Type: text/html; charset=utf-8
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<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <p>I must disagree with this reasoning.</p>
    <p>First of all, having the option does not mandate any ISP to use
      multiple transition mechanisms.</p>
    <p>However, there may be situations, when multiple transition
      mechanisms are being used. Let me give you just two simple
      examples.</p>
    <p>1. An ISP decides to change from one mechanism to another. (As we
      have just seen, 464XLAT, MAP-T and MAP-E have different advantages
      and drawback, thus this can be a rational decision.) The change
      may last for a while. (E.g. the new subscribers get the new
      technology and the old subscribers are moved in one year time
      frame.) Therefore the two mechanisms must coexist in the network
      of the ISP.<br>
    </p>
    <p>2. An ISP buys up another one and the two networks use two
      different mechanisms for providing IPv4 as a service. As both
      infrastructures are ready, it may be a rational decision to keep
      up both and move some users between them. (E.g. move MAP users,
      who complained about lack of port situation, to 464XLAT.)</p>
    <p>So, IMHO, it is useful to have the option to choose among the
      different mechanisms.</p>
    <p>Best regard,<br>
    </p>
    <p>Gábor Lencse<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 6/14/2018 4:37 AM, Lorenzo Colitti
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAKD1Yr3mieXkdQ6xyx5qJJyu4q=z0MVL5ZE-nAJ5wmjS1LOcAQ@mail.gmail.com">
      <div dir="ltr">
        <div class="gmail_quote">
          <div dir="ltr">On Thu, Jun 14, 2018 at 10:16 AM STARK, BARBARA
            H &lt;<a href="mailto:bs7652@att.com" moz-do-not-send="true">bs7652@att.com</a>&gt;
            wrote:<br>
          </div>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">The
            justification presented for the request for a new DHCPv6
            option 111 option code for 464XLAT was that an operator
            would be running multiple IPv4aas mechanisms and needed to
            express which they preferred a CE router to make use of..
            The discussion devolved into MAP vs. 464XLAT. The cases
            being made for 464XLAT vs MAP seemed to me to make a very
            strong case against deploying multiple mechanisms.<br>
            <br>
            Deploying multiple mechanisms has all the downsides of all
            the mechanisms. </blockquote>
          <div><br>
          </div>
          <div>Absolutely. Not just the downsides of all of them, but
            the cost of implementing all of them, and the increased
            operational burden of managing all of them at the same time,
            and the increased operational burden of managing the
            interaction between multiple mechanisms implemented by the
            same device.</div>
          <div><br>
          </div>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">To me,
            this one positive aspect is such a weak reason, that I would
            never use it to justify the additional capex, opex, and
            customer help desk costs.  </blockquote>
          <div><br>
          </div>
          <div>+1. </div>
        </div>
      </div>
      <!--'"--><br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
v6ops mailing list
<a class="moz-txt-link-abbreviated" href="mailto:v6ops@ietf.org">v6ops@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mailman/listinfo/v6ops</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>

--------------176F18D9F66A59C90E5BB699--


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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lencse =?UTF-8?B?R8OhYm9y?= <lencse@hit.bme.hu>, <v6ops@ietf.org>
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Thread-Topic: [v6ops] MAP vs 464XLAT and request to updating RFC8026 to support 464XLAT
References: <2D09D61DDFA73D4C884805CC7865E6114DDEB318@GAALPA1MSGUSRBF.ITServices.sbc.com> <CAKD1Yr3mieXkdQ6xyx5qJJyu4q=z0MVL5ZE-nAJ5wmjS1LOcAQ@mail.gmail.com> <ee722e2c-3a98-43ff-527b-b293fbdb288d@hit.bme.hu>
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Subject: Re: [v6ops] MAP vs 464XLAT and request to updating RFC8026 to support 464XLAT
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There may be one *very common* more reason as well.

=20

The ISP has a group of customers with CEs that only support one mechanism, =
which is different to the (actually) preferred transition mechanism, and th=
e ISP don=E2=80=99t want to replace those CEs, or not immediately.

=20

This was the main rational used in RFC8026:

=20
=E2=80=9CA common feature shared among all of the differing modes is the
=C2=A0=C2=A0 integration of softwire tunnel endpoint functionality into the

=C2=A0=C2=A0 Customer Premises Equipment (CPE) router.=C2=A0 Due to this in=
herent data

=C2=A0=C2=A0 plane similarity, a single CPE may be capable of supporting se=
veral

=C2=A0=C2=A0 different approaches.=C2=A0 Users may also wish to configure a=
 specific

=C2=A0=C2=A0 mode of operation.

=20

=C2=A0=C2=A0 A service provider's network may also have more than one S46

=C2=A0=C2=A0 mechanism enabled in order to support a diverse CPE population=
 with

=C2=A0=C2=A0 differing client functionality, such as during a migration bet=
ween

=C2=A0=C2=A0 mechanisms or where services require specific supporting softw=
ire

=C2=A0=C2=A0 architectures.=E2=80=9D


Regards,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lencse G=C3=A1bor <lencse@h=
it.bme.hu>
Fecha: jueves, 14 de junio de 2018, 9:22
Para: <v6ops@ietf.org>
Asunto: Re: [v6ops] MAP vs 464XLAT and request to updating RFC8026 to suppo=
rt 464XLAT

=20

I must disagree with this reasoning.

First of all, having the option does not mandate any ISP to use multiple tr=
ansition mechanisms.

However, there may be situations, when multiple transition mechanisms are b=
eing used. Let me give you just two simple examples.

1. An ISP decides to change from one mechanism to another. (As we have just=
 seen, 464XLAT, MAP-T and MAP-E have different advantages and drawback, thu=
s this can be a rational decision.) The change may last for a while. (E.g. =
the new subscribers get the new technology and the old subscribers are move=
d in one year time frame.) Therefore the two mechanisms must coexist in the=
 network of the ISP.

2. An ISP buys up another one and the two networks use two different mechan=
isms for providing IPv4 as a service. As both infrastructures are ready, it=
 may be a rational decision to keep up both and move some users between the=
m. (E.g. move MAP users, who complained about lack of port situation, to 46=
4XLAT.)

So, IMHO, it is useful to have the option to choose among the different mec=
hanisms.

Best regard,

G=C3=A1bor Lencse

=20

On 6/14/2018 4:37 AM, Lorenzo Colitti wrote:

On Thu, Jun 14, 2018 at 10:16 AM STARK, BARBARA H <bs7652@att.com> wrote:

The justification presented for the request for a new DHCPv6 option 111 opt=
ion code for 464XLAT was that an operator would be running multiple IPv4aas=
 mechanisms and needed to express which they preferred a CE router to make =
use of.. The discussion devolved into MAP vs. 464XLAT. The cases being made=
 for 464XLAT vs MAP seemed to me to make a very strong case against deployi=
ng multiple mechanisms.

Deploying multiple mechanisms has all the downsides of all the mechanisms.=
=20

=20

Absolutely. Not just the downsides of all of them, but the cost of implemen=
ting all of them, and the increased operational burden of managing all of t=
hem at the same time, and the increased operational burden of managing the =
interaction between multiple mechanisms implemented by the same device.

=20

To me, this one positive aspect is such a weak reason, that I would never u=
se it to justify the additional capex, opex, and customer help desk costs. =
=20

=20

+1.=20




_______________________________________________
v6ops mailing list
v6ops@ietf.org
https://www.ietf.org/mailman/listinfo/v6ops

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20



**********************************************
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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-la=
nguage:EN-US'>There may be one *<b>very common</b>* more reason as well.<o:=
p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-far=
east-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span=
 lang=3DEN-US style=3D'mso-fareast-language:EN-US'>The ISP has a group of c=
ustomers with CEs that only support one mechanism, which is different to th=
e (actually) preferred transition mechanism, and the ISP don=E2=80=99t want=
 to replace those CEs, or not immediately.<o:p></o:p></span></p><p class=3D=
MsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&nbs=
p;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-far=
east-language:EN-US'>This was the main rational used in RFC8026:<o:p></o:p>=
</span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-lan=
guage:EN-US'><o:p>&nbsp;</o:p></span></p><pre style=3D'background:white;wor=
d-break:break-all'><span lang=3DEN-US style=3D'font-family:"Calibri",sans-s=
erif;mso-fareast-language:EN-US'>=E2=80=9C</span><span lang=3DEN-US style=
=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>A common feature sh=
ared among all of the differing modes is the<o:p></o:p></span></pre><p clas=
s=3DMsoNormal style=3D'background:white;word-break:break-all'><span lang=3D=
EN-US style=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>=C2=A0=
=C2=A0 integration of softwire tunnel endpoint functionality into the<o:p><=
/o:p></span></p><p class=3DMsoNormal style=3D'background:white;word-break:b=
reak-all'><span lang=3DEN-US style=3D'font-size:10.5pt;font-family:"PT Mono=
";color:black'>=C2=A0=C2=A0 Customer Premises Equipment (CPE) router.=C2=A0=
 Due to this inherent data<o:p></o:p></span></p><p class=3DMsoNormal style=
=3D'background:white;word-break:break-all'><span lang=3DEN-US style=3D'font=
-size:10.5pt;font-family:"PT Mono";color:black'>=C2=A0=C2=A0 plane similari=
ty, a single CPE may be capable of supporting several<o:p></o:p></span></p>=
<p class=3DMsoNormal style=3D'background:white;word-break:break-all'><span =
lang=3DEN-US style=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>=
=C2=A0=C2=A0 different approaches.=C2=A0 Users may also wish to configure a=
 specific<o:p></o:p></span></p><p class=3DMsoNormal style=3D'background:whi=
te;word-break:break-all'><span lang=3DEN-US style=3D'font-size:10.5pt;font-=
family:"PT Mono";color:black'>=C2=A0=C2=A0 mode of operation.<o:p></o:p></s=
pan></p><p class=3DMsoNormal style=3D'background:white;word-break:break-all=
'><span lang=3DEN-US style=3D'font-size:10.5pt;font-family:"PT Mono";color:=
black'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal style=3D'background=
:white;word-break:break-all'><span lang=3DEN-US style=3D'font-size:10.5pt;f=
ont-family:"PT Mono";color:black'>=C2=A0=C2=A0 A service provider's network=
 may also have more than one S46<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:white;word-break:break-all'><span lang=3DEN-US style=3D=
'font-size:10.5pt;font-family:"PT Mono";color:black'>=C2=A0=C2=A0 mechanism=
 enabled in order to support a diverse CPE population with<o:p></o:p></span=
></p><p class=3DMsoNormal style=3D'background:white;word-break:break-all'><=
span lang=3DEN-US style=3D'font-size:10.5pt;font-family:"PT Mono";color:bla=
ck'>=C2=A0=C2=A0 differing client functionality, such as during a migration=
 between<o:p></o:p></span></p><p class=3DMsoNormal style=3D'background:whit=
e;word-break:break-all'><span lang=3DEN-US style=3D'font-size:10.5pt;font-f=
amily:"PT Mono";color:black'>=C2=A0=C2=A0 mechanisms or where services requ=
ire specific supporting softwire<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'background:white;word-break:break-all'><span lang=3DEN-US style=3D=
'font-size:10.5pt;font-family:"PT Mono";color:black'>=C2=A0=C2=A0 </span><s=
pan style=3D'font-size:10.5pt;font-family:"PT Mono";color:black'>architectu=
res.</span><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>=E2=80=
=9D</span><span style=3D'font-size:10.5pt;font-family:"PT Mono";color:black=
'><o:p></o:p></span></p><div><p class=3DMsoNormal><span lang=3DEN-US style=
=3D'font-size:10.5pt;color:black'><br></span><span lang=3DES-TRAD style=3D'=
font-size:10.5pt;color:black'>Regards,<o:p></o:p></span></p><p class=3DMsoN=
ormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD style=3D'font-size:10.5pt;color:black=
;mso-fareast-language:EN-US'>Jordi<o:p></o:p></span></p><p class=3DMsoNorma=
l style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD style=3D'font-size:10=
.5pt;color:black;mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p></=
div><p class=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-fareast-language=
:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DES-TR=
AD style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><div st=
yle=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm=
'><p class=3DMsoNormal style=3D'margin-left:35.4pt'><b><span style=3D'font-=
size:12.0pt;color:black'>De: </span></b><span style=3D'font-size:12.0pt;col=
or:black'>v6ops &lt;v6ops-bounces@ietf.org&gt; en nombre de Lencse G=C3=A1b=
or &lt;lencse@hit.bme.hu&gt;<br><b>Fecha: </b>jueves, 14 de junio de 2018, =
9:22<br><b>Para: </b>&lt;v6ops@ietf.org&gt;<br><b>Asunto: </b>Re: [v6ops] M=
AP vs 464XLAT and request to updating RFC8026 to support 464XLAT<o:p></o:p>=
</span></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:=
p>&nbsp;</o:p></p></div><p style=3D'margin-left:35.4pt'>I must disagree wit=
h this reasoning.<o:p></o:p></p><p style=3D'margin-left:35.4pt'>First of al=
l, having the option does not mandate any ISP to use multiple transition me=
chanisms.<o:p></o:p></p><p style=3D'margin-left:35.4pt'>However, there may =
be situations, when multiple transition mechanisms are being used. Let me g=
ive you just two simple examples.<o:p></o:p></p><p style=3D'margin-left:35.=
4pt'>1. An ISP decides to change from one mechanism to another. (As we have=
 just seen, 464XLAT, MAP-T and MAP-E have different advantages and drawback=
, thus this can be a rational decision.) The change may last for a while. (=
E.g. the new subscribers get the new technology and the old subscribers are=
 moved in one year time frame.) Therefore the two mechanisms must coexist i=
n the network of the ISP.<o:p></o:p></p><p style=3D'margin-left:35.4pt'>2. =
An ISP buys up another one and the two networks use two different mechanism=
s for providing IPv4 as a service. As both infrastructures are ready, it ma=
y be a rational decision to keep up both and move some users between them. =
(E.g. move MAP users, who complained about lack of port situation, to 464XL=
AT.)<o:p></o:p></p><p style=3D'margin-left:35.4pt'>So, IMHO, it is useful t=
o have the option to choose among the different mechanisms.<o:p></o:p></p><=
p style=3D'margin-left:35.4pt'>Best regard,<o:p></o:p></p><p style=3D'margi=
n-left:35.4pt'>G=C3=A1bor Lencse<o:p></o:p></p><p class=3DMsoNormal style=
=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal styl=
e=3D'margin-left:35.4pt'>On 6/14/2018 4:37 AM, Lorenzo Colitti wrote:<o:p><=
/o:p></p></div><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><=
div><div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>On Thu, Jun=
 14, 2018 at 10:16 AM STARK, BARBARA H &lt;<a href=3D"mailto:bs7652@att.com=
">bs7652@att.com</a>&gt; wrote:<o:p></o:p></p></div><blockquote style=3D'bo=
rder:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-=
left:4.8pt;margin-right:0cm'><p class=3DMsoNormal style=3D'margin-left:35.4=
pt'>The justification presented for the request for a new DHCPv6 option 111=
 option code for 464XLAT was that an operator would be running multiple IPv=
4aas mechanisms and needed to express which they preferred a CE router to m=
ake use of.. The discussion devolved into MAP vs. 464XLAT. The cases being =
made for 464XLAT vs MAP seemed to me to make a very strong case against dep=
loying multiple mechanisms.<br><br>Deploying multiple mechanisms has all th=
e downsides of all the mechanisms. <o:p></o:p></p></blockquote><div><p clas=
s=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div><div>=
<p class=3DMsoNormal style=3D'margin-left:35.4pt'>Absolutely. Not just the =
downsides of all of them, but the cost of implementing all of them, and the=
 increased operational burden of managing all of them at the same time, and=
 the increased operational burden of managing the interaction between multi=
ple mechanisms implemented by the same device.<o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</=
o:p></p></div><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.=
0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=
=3DMsoNormal style=3D'margin-left:35.4pt'>To me, this one positive aspect i=
s such a weak reason, that I would never use it to justify the additional c=
apex, opex, and customer help desk costs.&nbsp;&nbsp;<o:p></o:p></p></block=
quote><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o=
:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>+1.&nbs=
p;<o:p></o:p></p></div></div></div><p class=3DMsoNormal style=3D'margin-lef=
t:35.4pt'><br><br><br><o:p></o:p></p><pre style=3D'margin-left:35.4pt'>____=
___________________________________________<o:p></o:p></pre><pre style=3D'm=
argin-left:35.4pt'>v6ops mailing list<o:p></o:p></pre><pre style=3D'margin-=
left:35.4pt'><a href=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a><o:p></o:p=
></pre><pre style=3D'margin-left:35.4pt'><a href=3D"https://www.ietf.org/ma=
ilman/listinfo/v6ops">https://www.ietf.org/mailman/listinfo/v6ops</a><o:p><=
/o:p></pre></blockquote><p class=3DMsoNormal style=3D'margin-left:35.4pt'><=
br>_______________________________________________ v6ops mailing list v6ops=
@ietf.org https://www.ietf.org/mailman/listinfo/v6ops <o:p></o:p></p></div>=
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From: Lorenzo Colitti <lorenzo@google.com>
Date: Thu, 14 Jun 2018 18:32:20 +0900
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To: Ole Troan <otroan@employees.org>
Cc: lencse@hit.bme.hu, "v6ops@ietf.org WG" <v6ops@ietf.org>
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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On Thu, Jun 14, 2018 at 4:37 AM Ole Troan <otroan@employees.org> wrote:

> The main "benefit" of 464XLAT is two-fold. It was lighter on provisioning
> than e.g. MAP-E or MAP-T and it could reuse a stateful NAT64, which could
> serve IPv6 only hosts reaching the IPv4 Internet.
>

Almost. The "benefits" that led to 464xlat being widely deployed were:

   - It didn't use encapsulation, so it didn't break the DPI / header
   enrichment / billing / QoS ... systems used by mobile networks.
   - It didn't use DHCPv6 so it was possible to provision it on networks
   that don't support DHCPv6, like mobile networks. The first implementation
   used ipv4.google.com.
   - There were already NAT64s in the field because people had tried to
   deploy IPv6-only with NAT64 and failed due to app breakage.

--000000000000561925056e96c773
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu, Jun 14=
, 2018 at 4:37 AM Ole Troan &lt;<a href=3D"mailto:otroan@employees.org">otr=
oan@employees.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote"=
 style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Th=
e main &quot;benefit&quot; of 464XLAT is two-fold. It was lighter on provis=
ioning than e.g. MAP-E or MAP-T and it could reuse a stateful NAT64, which =
could serve IPv6 only hosts reaching the IPv4 Internet.<br></blockquote><di=
v>=C2=A0</div><div>Almost. The &quot;benefits&quot; that led to 464xlat bei=
ng widely deployed were:</div><div><ul><li>It didn&#39;t use encapsulation,=
 so it didn&#39;t break the DPI / header enrichment / billing / QoS ... sys=
tems used by mobile networks.</li><li>It didn&#39;t use DHCPv6 so it was po=
ssible to provision it on networks that don&#39;t support DHCPv6, like mobi=
le networks. The first implementation used <a href=3D"http://ipv4.google.co=
m">ipv4.google.com</a>.</li><li>There were already NAT64s in the field beca=
use people had tried to deploy IPv6-only with NAT64 and failed due to app b=
reakage.</li></ul></div></div></div>

--000000000000561925056e96c773--


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Thread-Topic: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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From: Lorenzo Colitti <lorenzo@google.com>
Date: Thu, 14 Jun 2018 19:30:46 +0900
Message-ID: <CAKD1Yr3O7qY+N07_=XyFmWSjJW5rzmgEZbpwC9rNVBJYmxyLsA@mail.gmail.com>
To: "Heatley,N,Nick,TQB R" <nick.heatley@bt.com>
Cc: Ole Troan <otroan@employees.org>, "v6ops@ietf.org WG" <v6ops@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/7wKWGkCn2q1Ocn9LJrxwxJNUgQ0>
Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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On Thu, Jun 14, 2018 at 7:28 PM <nick.heatley@bt.com> wrote:

> If the requirement is do something better than NAT44 CGN then you can see
> why 464xlat has its place.
>
> MAP-T could in theory do this job. it seems more complex to deploy and the
> case to go from 464xlat to MAP-T seems weak, but if it really existed in
> mobile devices it may be something to consider.
>

Oh, I definitely agree that 464xlat has it's place. I maintain a popular
implementation of it :-)

I'm just saying it's not the best solution for a wireline network.

--000000000000731820056e9798c0
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<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu, Jun 14=
, 2018 at 7:28 PM &lt;<a href=3D"mailto:nick.heatley@bt.com">nick.heatley@b=
t.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div class=3D"m_5598642356861300612WordSection1">
<p class=3D"MsoNormal">If the requirement is do something better than NAT44=
 CGN then you can see why 464xlat has its place.<br></p>
<p class=3D"MsoNormal"><span>MAP-T could in theory do this job. it seems mo=
re complex to deploy and the case to go from 464xlat to MAP-T seems weak, b=
ut if it really existed in mobile devices it may be something to consider.<=
/span></p></div></div></blockquote><div><br></div><div>Oh, I definitely agr=
ee that 464xlat has it&#39;s place. I maintain a popular implementation of =
it :-)</div><div><br></div><div>I&#39;m just saying it&#39;s not the best s=
olution for a wireline network.=C2=A0</div></div></div>

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From: Ca By <cb.list6@gmail.com>
Date: Thu, 14 Jun 2018 05:12:37 -0700
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To: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>
Cc: "Heatley, N, Nick, TQB R" <nick.heatley@bt.com>, "v6ops@ietf.org WG" <v6ops@ietf.org>
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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--00000000000088dd28056e990449
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On Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti <lorenzo=
40google.com@dmarc.ietf.org> wrote:

> On Thu, Jun 14, 2018 at 7:28 PM <nick.heatley@bt.com> wrote:
>
>> If the requirement is do something better than NAT44 CGN then you can see
>> why 464xlat has its place.
>>
>> MAP-T could in theory do this job. it seems more complex to deploy and
>> the case to go from 464xlat to MAP-T seems weak, but if it really existed
>> in mobile devices it may be something to consider.
>>
>
> Oh, I definitely agree that 464xlat has it's place. I maintain a popular
> implementation of it :-)
>
> I'm just saying it's not the best solution for a wireline network.
>

Perhaps.

The market for ipv6-only transition, afaik, is won by ds-lite and 464xlat.

Afaik, there is not a large production stateless MAP implementation, and
this market is fairly mature. That said, at this point, the theoretical
advantage of stateless has failed to materialize in real world deployment
... while the stateful solutions keep gaining share.


_______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>

--00000000000088dd28056e990449
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<div><br></div><div><br><div class=3D"gmail_quote"><div dir=3D"auto">On Thu=
, Jun 14, 2018 at 3:31 AM Lorenzo Colitti &lt;lorenzo=3D<a href=3D"mailto:4=
0google.com@dmarc.ietf.org">40google.com@dmarc.ietf.org</a>&gt; wrote:<br><=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-le=
ft:1px #ccc solid;padding-left:1ex"><div><div class=3D"gmail_quote"><div>On=
 Thu, Jun 14, 2018 at 7:28 PM &lt;<a href=3D"mailto:nick.heatley@bt.com" ta=
rget=3D"_blank">nick.heatley@bt.com</a>&gt; wrote:<br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pa=
dding-left:1ex">





<div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple">
<div class=3D"m_-4421753669664148983m_5598642356861300612WordSection1">
<p class=3D"MsoNormal">If the requirement is do something better than NAT44=
 CGN then you can see why 464xlat has its place.<br></p>
<p class=3D"MsoNormal"><span>MAP-T could in theory do this job. it seems mo=
re complex to deploy and the case to go from 464xlat to MAP-T seems weak, b=
ut if it really existed in mobile devices it may be something to consider.<=
/span></p></div></div></blockquote><div><br></div></div></div><div><div cla=
ss=3D"gmail_quote"><div>Oh, I definitely agree that 464xlat has it&#39;s pl=
ace. I maintain a popular implementation of it :-)</div><div><br></div><div=
>I&#39;m just saying it&#39;s not the best solution for a wireline network.=
=C2=A0</div></div></div></blockquote><div dir=3D"auto"><br></div><div dir=
=3D"auto">Perhaps.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto"=
>The market for ipv6-only transition, afaik, is won by ds-lite and 464xlat.=
=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">Afaik, there is n=
ot a large production stateless MAP implementation, and this market is fair=
ly mature. That said, at this point, the theoretical advantage of stateless=
 has failed to materialize in real world deployment ... while the stateful =
solutions keep gaining share.=C2=A0</div><div dir=3D"auto"><br></div><div d=
ir=3D"auto"><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0=
 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class=3D"gma=
il_quote"><div></div></div></div>
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From: Lee Howard <lee@asgard.org>
Message-ID: <377fe961-c11c-de2d-35dd-6be8478a94b3@asgard.org>
Date: Thu, 14 Jun 2018 09:15:56 -0400
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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On 06/14/2018 08:12 AM, Ca By wrote:
>
>
> On Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti 
> <lorenzo=40google.com@dmarc.ietf.org 
> <mailto:40google.com@dmarc.ietf.org>> wrote:
>
>     On Thu, Jun 14, 2018 at 7:28 PM <nick.heatley@bt.com
>     <mailto:nick.heatley@bt.com>> wrote:
>
>
>
>     Oh, I definitely agree that 464xlat has it's place. I maintain a
>     popular implementation of it :-)
>
>     I'm just saying it's not the best solution for a wireline network.
>
>
> Perhaps.
>
> The market for ipv6-only transition, afaik, is won by ds-lite and 
> 464xlat.
>
> Afaik, there is not a large production stateless MAP implementation, 
> and this market is fairly mature. That said, at this point, the 
> theoretical advantage of stateless has failed to materialize in real 
> world deployment ... while the stateful solutions keep gaining share.
>


Crowd-sourced list of transition technologies various carriers have 
deployed: 
https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=0

I see several that have deployed MAP.

I speculate that DS-Lite and NAT64 had early mover advantage (i.e., 
early development), and were the only game in town. 464xlat only has 
that advantage in mobile, since handsets are the only major CLAT 
implementation.

I think it's too soon to declare winners.

Lee




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  <body text="#000000" bgcolor="#FFFFFF">
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    </p>
    <br>
    <div class="moz-cite-prefix">On 06/14/2018 08:12 AM, Ca By wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAD6AjGQtSzdTtOZm-0=1A0ndCPf2aYyUjh8c8npLX-QgomrDJw@mail.gmail.com">
      <div><br>
      </div>
      <div><br>
        <div class="gmail_quote">
          <div dir="auto">On Thu, Jun 14, 2018 at 3:31 AM Lorenzo
            Colitti &lt;lorenzo=<a
              href="mailto:40google.com@dmarc.ietf.org"
              moz-do-not-send="true">40google.com@dmarc.ietf.org</a>&gt;
            wrote:<br>
          </div>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div>
              <div class="gmail_quote">
                <div>On Thu, Jun 14, 2018 at 7:28 PM &lt;<a
                    href="mailto:nick.heatley@bt.com" target="_blank"
                    moz-do-not-send="true">nick.heatley@bt.com</a>&gt;
                  wrote:<br>
                </div>
                <blockquote class="gmail_quote" style="margin:0 0 0
                  .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  <div link="blue" vlink="purple" lang="EN-GB">
                    <div
                      class="m_-4421753669664148983m_5598642356861300612WordSection1"><br>
                    </div>
                  </div>
                </blockquote>
                <div><br>
                </div>
              </div>
            </div>
            <div>
              <div class="gmail_quote">
                <div>Oh, I definitely agree that 464xlat has it's place.
                  I maintain a popular implementation of it :-)</div>
                <div><br>
                </div>
                <div>I'm just saying it's not the best solution for a
                  wireline network. </div>
              </div>
            </div>
          </blockquote>
          <div dir="auto"><br>
          </div>
          <div dir="auto">Perhaps. </div>
          <div dir="auto"><br>
          </div>
          <div dir="auto">The market for ipv6-only transition, afaik, is
            won by ds-lite and 464xlat. </div>
          <div dir="auto"><br>
          </div>
          <div dir="auto">Afaik, there is not a large production
            stateless MAP implementation, and this market is fairly
            mature. That said, at this point, the theoretical advantage
            of stateless has failed to materialize in real world
            deployment ... while the stateful solutions keep gaining
            share. </div>
          <div dir="auto"><br>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
    <br>
    Crowd-sourced list of transition technologies various carriers have
    deployed:
<a class="moz-txt-link-freetext" href="https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=0">https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=0</a><br>
    <br>
    I see several that have deployed MAP. <br>
    <br>
    I speculate that DS-Lite and NAT64 had early mover advantage (i.e.,
    early development), and were the only game in town. 464xlat only has
    that advantage in mobile, since handsets are the only major CLAT
    implementation. <br>
    <br>
    I think it's too soon to declare winners.<br>
    <br>
    Lee<br>
    <br>
    <br>
    <br>
  </body>
</html>

--------------EB37A1DB299D054C70B144F3--


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Date: Thu, 14 Jun 2018 15:32:15 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lee Howard <lee@asgard.org>, <v6ops@ietf.org>
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Thread-Topic: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <C48F6BAD-84CE-4121-B862-218004A417D3@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <da095b32-3bb9-d2ec-dd41-e6e526cff83f@hit.bme.hu> <CAKD1Yr3ZbOLbsXFmZqa78ZJ9aaiFnCxAPUVOX26=VoqChA1g-A@mail.gmail.com> <7eb46aa1-699a-7397-d0d9-51d1160b4148@hit.bme.hu> <671083EC-62E4-44ED-91AD-EBD0DFB086F6@employees.org> <CAKD1Yr0BJWveM966+=bdRK+6OSA1aALM0yN4QeRNgg9HVpA4xQ@mail.gmail.com> <LO1P123MB009872BA45A52D18819FF3A6EA7D0@LO1P123MB0098.GBRP123.PROD.OUTLOOK.COM> <CAKD1Yr3O7qY+N07_=XyFmWSjJW5rzmgEZbpwC9rNVBJYmxyLsA@mail.gmail.com> <CAD6AjGQtSzdTtOZm-0=1A0ndCPf2aYyUjh8c8npLX-QgomrDJw@mail.gmail.com> <377fe961-c11c-de2d-35dd-6be8478a94b3@asgard.org>
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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I recall Windows Update 10 also has included CLAT support. I=E2=80=99m sure=
 this will happen more and more in different OSs, as it makes a lot of sens=
e in networks that may already have NAT64.

=20

I don=E2=80=99t think that will happen with MAP or DS-Lite (I mean having t=
hose in the OSs).

=20

If we are pushing for IPv6-only enterprise networks, the CLAT will be also =
the way to ensure that old apps work, if the enterprise router don=E2=80=99=
t have the CLAT already enabled.

=20

Another important aspect, in my opinion, is that the implementation of CLAT=
, even for a CPE, it is the much simpler one compared with any other one.


Regarsd,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lee Howard <lee@asgard.org>
Fecha: jueves, 14 de junio de 2018, 15:16
Para: <v6ops@ietf.org>
Asunto: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really=
 inferior to all other IPv6 transition technologies? -- Re: updating RFC802=
6 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas

=20

=20

=20

On 06/14/2018 08:12 AM, Ca By wrote:

=20

=20

On Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti <lorenzo=3D40google.com@dma=
rc.ietf.org> wrote:

On Thu, Jun 14, 2018 at 7:28 PM <nick.heatley@bt.com> wrote:

=20

=20

Oh, I definitely agree that 464xlat has it's place. I maintain a popular im=
plementation of it :-)

=20

I'm just saying it's not the best solution for a wireline network.=20

=20

Perhaps.=20

=20

The market for ipv6-only transition, afaik, is won by ds-lite and 464xlat.=
=20

=20

Afaik, there is not a large production stateless MAP implementation, and th=
is market is fairly mature. That said, at this point, the theoretical advan=
tage of stateless has failed to materialize in real world deployment ... wh=
ile the stateful solutions keep gaining share.=20

=20



Crowd-sourced list of transition technologies various carriers have deploye=
d: https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO=
_7NK9vcVApc/edit#gid=3D0

I see several that have deployed MAP.=20

I speculate that DS-Lite and NAT64 had early mover advantage (i.e., early d=
evelopment), and were the only game in town. 464xlat only has that advantag=
e in mobile, since handsets are the only major CLAT implementation.=20

I think it's too soon to declare winners.

Lee



_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20



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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-la=
nguage:EN-US'>I recall Windows Update 10 also has included CLAT support. I=
=E2=80=99m sure this will happen more and more in different OSs, as it make=
s a lot of sense in networks that may already have NAT64.<o:p></o:p></span>=
</p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:E=
N-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US s=
tyle=3D'mso-fareast-language:EN-US'>I don=E2=80=99t think that will happen =
with MAP or DS-Lite (I mean having those in the OSs).<o:p></o:p></span></p>=
<p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US=
'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=
=3D'mso-fareast-language:EN-US'>If we are pushing for IPv6-only enterprise =
networks, the CLAT will be also the way to ensure that old apps work, if th=
e enterprise router don=E2=80=99t have the CLAT already enabled.<o:p></o:p>=
</span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-lan=
guage:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3D=
EN-US style=3D'mso-fareast-language:EN-US'>Another important aspect, in my =
opinion, is that the implementation of CLAT, even for a CPE, it is the much=
 simpler one compared with any other one.<o:p></o:p></span></p><div><p clas=
s=3DMsoNormal><span lang=3DEN-US style=3D'font-size:10.5pt;color:black'><br=
>Regarsd,<o:p></o:p></span></p><p class=3DMsoNormal style=3D'margin-bottom:=
12.0pt'><span lang=3DEN-US style=3D'font-size:10.5pt;color:black;mso-fareas=
t-language:EN-US'>Jordi<o:p></o:p></span></p><p class=3DMsoNormal style=3D'=
margin-bottom:12.0pt'><span lang=3DEN-US style=3D'font-size:10.5pt;color:bl=
ack;mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p></div><p class=
=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&=
nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-=
fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><div style=3D'border:no=
ne;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMso=
Normal style=3D'margin-left:35.4pt'><b><span style=3D'font-size:12.0pt;colo=
r:black'>De: </span></b><span style=3D'font-size:12.0pt;color:black'>v6ops =
&lt;v6ops-bounces@ietf.org&gt; en nombre de Lee Howard &lt;lee@asgard.org&g=
t;<br><b>Fecha: </b>jueves, 14 de junio de 2018, 15:16<br><b>Para: </b>&lt;=
v6ops@ietf.org&gt;<br><b>Asunto: </b>Re: [v6ops] Disadvantages of MAP proto=
cols -- Re: Is 464XLAT really inferior to all other IPv6 transition technol=
ogies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-trans=
ition-ipv4aas<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D=
'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div><p style=3D'margin-left:35.=
4pt'><o:p>&nbsp;</o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'=
><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal style=3D'margin-left:35.4pt=
'>On 06/14/2018 08:12 AM, Ca By wrote:<o:p></o:p></p></div><blockquote styl=
e=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=3DMsoNormal style=
=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div><div><p class=3DMsoNorma=
l style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p><div><div><p class=3DMs=
oNormal style=3D'margin-left:35.4pt'>On Thu, Jun 14, 2018 at 3:31 AM Lorenz=
o Colitti &lt;lorenzo=3D<a href=3D"mailto:40google.com@dmarc.ietf.org">40go=
ogle.com@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></p></div><blockquote styl=
e=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;=
margin-left:4.8pt;margin-right:0cm'><div><div><div><p class=3DMsoNormal sty=
le=3D'margin-left:35.4pt'>On Thu, Jun 14, 2018 at 7:28 PM &lt;<a href=3D"ma=
ilto:nick.heatley@bt.com" target=3D"_blank">nick.heatley@bt.com</a>&gt; wro=
te:<o:p></o:p></p></div><blockquote style=3D'border:none;border-left:solid =
#CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'=
><div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3DE=
N-GB><o:p>&nbsp;</o:p></span></p></div></div></blockquote><div><p class=3DM=
soNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div></div></di=
v><div><div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>Oh, I definitely agree that 464xlat has it's place. I maintain a popular=
 implementation of it :-)<o:p></o:p></p></div><div><p class=3DMsoNormal sty=
le=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div><div><p class=3DMsoNor=
mal style=3D'margin-left:35.4pt'>I'm just saying it's not the best solution=
 for a wireline network.&nbsp;<o:p></o:p></p></div></div></div></blockquote=
><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></=
p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>Perhaps.&nbs=
p;<o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4p=
t'><o:p>&nbsp;</o:p></p></div><div><p class=3DMsoNormal style=3D'margin-lef=
t:35.4pt'>The market for ipv6-only transition, afaik, is won by ds-lite and=
 464xlat.&nbsp;<o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'marg=
in-left:35.4pt'><o:p>&nbsp;</o:p></p></div><div><p class=3DMsoNormal style=
=3D'margin-left:35.4pt'>Afaik, there is not a large production stateless MA=
P implementation, and this market is fairly mature. That said, at this poin=
t, the theoretical advantage of stateless has failed to materialize in real=
 world deployment ... while the stateful solutions keep gaining share.&nbsp=
;<o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt=
'><o:p>&nbsp;</o:p></p></div></div></div></blockquote><p class=3DMsoNormal =
style=3D'margin-left:35.4pt'><br><br>Crowd-sourced list of transition techn=
ologies various carriers have deployed: <a href=3D"https://docs.google.com/=
spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=3D0">h=
ttps://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK=
9vcVApc/edit#gid=3D0</a><br><br>I see several that have deployed MAP. <br><=
br>I speculate that DS-Lite and NAT64 had early mover advantage (i.e., earl=
y development), and were the only game in town. 464xlat only has that advan=
tage in mobile, since handsets are the only major CLAT implementation. <br>=
<br>I think it's too soon to declare winners.<br><br>Lee<br><br><br><br>___=
____________________________________________ v6ops mailing list v6ops@ietf.=
org https://www.ietf.org/mailman/listinfo/v6ops <o:p></o:p></p></div><br>**=
********************************************<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
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From: Lee Howard <lee@asgard.org>
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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On 06/14/2018 09:32 AM, JORDI PALET MARTINEZ wrote:
>
> I recall Windows Update 10 also has included CLAT support. I’m sure 
> this will happen more and more in different OSs, as it makes a lot of 
> sense in networks that may already have NAT64.
>

You think? Like game console OSs and thermostat OSs and stereo OSs and 
TV OSs?

> I don’t think that will happen with MAP or DS-Lite (I mean having 
> those in the OSs).
>

Ew, I hope not, that's the wrong place to implement those. I suppose I 
could imagine using a softwire as a VPN assuming IPv6--no, no I can't 
imagine it.

> If we are pushing for IPv6-only enterprise networks, the CLAT will be 
> also the way to ensure that old apps work, if the enterprise router 
> don’t have the CLAT already enabled.
>
> Another important aspect, in my opinion, is that the implementation of 
> CLAT, even for a CPE, it is the much simpler one compared with any 
> other one.
>

That only matters if it actually gets implemented. "Easy" and "done" are 
different.

You've said that home gateway vendors by and large have code for all of 
the mechanisms already written, so I'm not sure ease is essential.

There are other drivers here, and while I have no concerns about 
464xlat, I also am not ready to crown it the winner.

Lee

>
> Regarsd,
>
> Jordi
>
> *De: *v6ops <v6ops-bounces@ietf.org> en nombre de Lee Howard 
> <lee@asgard.org>
> *Fecha: *jueves, 14 de junio de 2018, 15:16
> *Para: *<v6ops@ietf.org>
> *Asunto: *Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT 
> really inferior to all other IPv6 transition technologies? -- Re: 
> updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
>
> On 06/14/2018 08:12 AM, Ca By wrote:
>
>     On Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti
>     <lorenzo=40google.com@dmarc.ietf.org
>     <mailto:40google.com@dmarc.ietf.org>> wrote:
>
>         On Thu, Jun 14, 2018 at 7:28 PM <nick.heatley@bt.com
>         <mailto:nick.heatley@bt.com>> wrote:
>
>         Oh, I definitely agree that 464xlat has it's place. I maintain
>         a popular implementation of it :-)
>
>         I'm just saying it's not the best solution for a wireline
>         network.
>
>     Perhaps.
>
>     The market for ipv6-only transition, afaik, is won by ds-lite and
>     464xlat.
>
>     Afaik, there is not a large production stateless MAP
>     implementation, and this market is fairly mature. That said, at
>     this point, the theoretical advantage of stateless has failed to
>     materialize in real world deployment ... while the stateful
>     solutions keep gaining share.
>
>
>
> Crowd-sourced list of transition technologies various carriers have 
> deployed: 
> https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=0
>
> I see several that have deployed MAP.
>
> I speculate that DS-Lite and NAT64 had early mover advantage (i.e., 
> early development), and were the only game in town. 464xlat only has 
> that advantage in mobile, since handsets are the only major CLAT 
> implementation.
>
> I think it's too soon to declare winners.
>
> Lee
>
>
>
> _______________________________________________ v6ops mailing list 
> v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>
>
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>
> This electronic message contains information which may be privileged 
> or confidential. The information is intended to be for the exclusive 
> use of the individual(s) named above and further non-explicilty 
> authorized disclosure, copying, distribution or use of the contents of 
> this information, even if partially, including attached files, is 
> strictly prohibited and will be considered a criminal offense. If you 
> are not the intended recipient be aware that any disclosure, copying, 
> distribution or use of the contents of this information, even if 
> partially, including attached files, is strictly prohibited, will be 
> considered a criminal offense, so you must reply to the original 
> sender to inform about this communication and delete it.
>


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    <br>
    <div class="moz-cite-prefix">On 06/14/2018 09:32 AM, JORDI PALET
      MARTINEZ wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:DC5325E3-C4D9-4341-98FB-E1EB93EA375C@consulintel.es">
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      <div class="WordSection1">
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US">I recall Windows Update 10 also has included
            CLAT support. I’m sure this will happen more and more in
            different OSs, as it makes a lot of sense in networks that
            may already have NAT64.</span></p>
      </div>
    </blockquote>
    <br>
    You think? Like game console OSs and thermostat OSs and stereo OSs
    and TV OSs? <br>
    <br>
    <blockquote type="cite"
      cite="mid:DC5325E3-C4D9-4341-98FB-E1EB93EA375C@consulintel.es">
      <div class="WordSection1">
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US">I don’t think that will happen with MAP or
            DS-Lite (I mean having those in the OSs).</span></p>
      </div>
    </blockquote>
    <br>
    Ew, I hope not, that's the wrong place to implement those. I suppose
    I could imagine using a softwire as a VPN assuming IPv6--no, no I
    can't imagine it.<br>
    <br>
    <blockquote type="cite"
      cite="mid:DC5325E3-C4D9-4341-98FB-E1EB93EA375C@consulintel.es">
      <div class="WordSection1">
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US">If we are pushing for IPv6-only enterprise
            networks, the CLAT will be also the way to ensure that old
            apps work, if the enterprise router don’t have the CLAT
            already enabled.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US">Another important aspect, in my opinion, is
            that the implementation of CLAT, even for a CPE, it is the
            much simpler one compared with any other one.</span></p>
      </div>
    </blockquote>
    <br>
    That only matters if it actually gets implemented. "Easy" and "done"
    are different.<br>
    <br>
    You've said that home gateway vendors by and large have code for all
    of the mechanisms already written, so I'm not sure ease is
    essential.<br>
    <br>
    There are other drivers here, and while I have no concerns about
    464xlat, I also am not ready to crown it the winner. <br>
    <br>
    Lee<br>
     <br>
    <blockquote type="cite"
      cite="mid:DC5325E3-C4D9-4341-98FB-E1EB93EA375C@consulintel.es">
      <div class="WordSection1">
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US"><o:p></o:p></span></p>
        <div>
          <p class="MsoNormal"><span
              style="font-size:10.5pt;color:black" lang="EN-US"><br>
              Regarsd,<o:p></o:p></span></p>
          <p class="MsoNormal" style="margin-bottom:12.0pt"><span
              style="font-size:10.5pt;color:black;mso-fareast-language:EN-US"
              lang="EN-US">Jordi<o:p></o:p></span></p>
          <p class="MsoNormal" style="margin-bottom:12.0pt"><span
              style="font-size:10.5pt;color:black;mso-fareast-language:EN-US"
              lang="EN-US"><o:p> </o:p></span></p>
        </div>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US"><o:p> </o:p></span></p>
        <div style="border:none;border-top:solid #B5C4DF
          1.0pt;padding:3.0pt 0cm 0cm 0cm">
          <p class="MsoNormal" style="margin-left:35.4pt"><b><span
                style="font-size:12.0pt;color:black">De: </span></b><span
              style="font-size:12.0pt;color:black">v6ops
              <a class="moz-txt-link-rfc2396E" href="mailto:v6ops-bounces@ietf.org">&lt;v6ops-bounces@ietf.org&gt;</a> en nombre de Lee Howard
              <a class="moz-txt-link-rfc2396E" href="mailto:lee@asgard.org">&lt;lee@asgard.org&gt;</a><br>
              <b>Fecha: </b>jueves, 14 de junio de 2018, 15:16<br>
              <b>Para: </b><a class="moz-txt-link-rfc2396E" href="mailto:v6ops@ietf.org">&lt;v6ops@ietf.org&gt;</a><br>
              <b>Asunto: </b>Re: [v6ops] Disadvantages of MAP protocols
              -- Re: Is 464XLAT really inferior to all other IPv6
              transition technologies? -- Re: updating RFC8026 to
              support 464XLAT in draft-ietf-v6ops-transition-ipv4aas<o:p></o:p></span></p>
        </div>
        <div>
          <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
        </div>
        <p style="margin-left:35.4pt"><o:p> </o:p></p>
        <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
        <div>
          <p class="MsoNormal" style="margin-left:35.4pt">On 06/14/2018
            08:12 AM, Ca By wrote:<o:p></o:p></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <div>
            <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
            <div>
              <div>
                <p class="MsoNormal" style="margin-left:35.4pt">On Thu,
                  Jun 14, 2018 at 3:31 AM Lorenzo Colitti &lt;lorenzo=<a
                    href="mailto:40google.com@dmarc.ietf.org"
                    moz-do-not-send="true">40google.com@dmarc.ietf.org</a>&gt;
                  wrote:<o:p></o:p></p>
              </div>
              <blockquote style="border:none;border-left:solid #CCCCCC
                1.0pt;padding:0cm 0cm 0cm
                6.0pt;margin-left:4.8pt;margin-right:0cm">
                <div>
                  <div>
                    <div>
                      <p class="MsoNormal" style="margin-left:35.4pt">On
                        Thu, Jun 14, 2018 at 7:28 PM &lt;<a
                          href="mailto:nick.heatley@bt.com"
                          target="_blank" moz-do-not-send="true">nick.heatley@bt.com</a>&gt;
                        wrote:<o:p></o:p></p>
                    </div>
                    <blockquote style="border:none;border-left:solid
                      #CCCCCC 1.0pt;padding:0cm 0cm 0cm
                      6.0pt;margin-left:4.8pt;margin-right:0cm">
                      <div>
                        <div>
                          <p class="MsoNormal"
                            style="margin-left:35.4pt"><span
                              lang="EN-GB"><o:p> </o:p></span></p>
                        </div>
                      </div>
                    </blockquote>
                    <div>
                      <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
                    </div>
                  </div>
                </div>
                <div>
                  <div>
                    <div>
                      <p class="MsoNormal" style="margin-left:35.4pt">Oh,
                        I definitely agree that 464xlat has it's place.
                        I maintain a popular implementation of it :-)<o:p></o:p></p>
                    </div>
                    <div>
                      <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
                    </div>
                    <div>
                      <p class="MsoNormal" style="margin-left:35.4pt">I'm
                        just saying it's not the best solution for a
                        wireline network. <o:p></o:p></p>
                    </div>
                  </div>
                </div>
              </blockquote>
              <div>
                <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal" style="margin-left:35.4pt">Perhaps. <o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal" style="margin-left:35.4pt">The
                  market for ipv6-only transition, afaik, is won by
                  ds-lite and 464xlat. <o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
              </div>
              <div>
                <p class="MsoNormal" style="margin-left:35.4pt">Afaik,
                  there is not a large production stateless MAP
                  implementation, and this market is fairly mature. That
                  said, at this point, the theoretical advantage of
                  stateless has failed to materialize in real world
                  deployment ... while the stateful solutions keep
                  gaining share. <o:p></o:p></p>
              </div>
              <div>
                <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
              </div>
            </div>
          </div>
        </blockquote>
        <p class="MsoNormal" style="margin-left:35.4pt"><br>
          <br>
          Crowd-sourced list of transition technologies various carriers
          have deployed: <a
href="https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=0"
            moz-do-not-send="true">https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=0</a><br>
          <br>
          I see several that have deployed MAP. <br>
          <br>
          I speculate that DS-Lite and NAT64 had early mover advantage
          (i.e., early development), and were the only game in town.
          464xlat only has that advantage in mobile, since handsets are
          the only major CLAT implementation. <br>
          <br>
          I think it's too soon to declare winners.<br>
          <br>
          Lee<br>
          <br>
          <br>
          <br>
          _______________________________________________ v6ops mailing
          list <a class="moz-txt-link-abbreviated" href="mailto:v6ops@ietf.org">v6ops@ietf.org</a>
          <a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mailman/listinfo/v6ops</a> <o:p></o:p></p>
      </div>
      <br>
      **********************************************<br>
      IPv4 is over<br>
      Are you ready for the new Internet ?<br>
      <a class="moz-txt-link-freetext" href="http://www.consulintel.es">http://www.consulintel.es</a><br>
      The IPv6 Company<br>
      <br>
      This electronic message contains information which may be
      privileged or confidential. The information is intended to be for
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    <br>
  </body>
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Date: Thu, 14 Jun 2018 16:20:42 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lee Howard <lee@asgard.org>, <v6ops@ietf.org>
Message-ID: <D8C2AF9B-45FD-48CE-AFDE-D6EF651936A4@consulintel.es>
Thread-Topic: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <da095b32-3bb9-d2ec-dd41-e6e526cff83f@hit.bme.hu> <CAKD1Yr3ZbOLbsXFmZqa78ZJ9aaiFnCxAPUVOX26=VoqChA1g-A@mail.gmail.com> <7eb46aa1-699a-7397-d0d9-51d1160b4148@hit.bme.hu> <671083EC-62E4-44ED-91AD-EBD0DFB086F6@employees.org> <CAKD1Yr0BJWveM966+=bdRK+6OSA1aALM0yN4QeRNgg9HVpA4xQ@mail.gmail.com> <LO1P123MB009872BA45A52D18819FF3A6EA7D0@LO1P123MB0098.GBRP123.PROD.OUTLOOK.COM> <CAKD1Yr3O7qY+N07_=XyFmWSjJW5rzmgEZbpwC9rNVBJYmxyLsA@mail.gmail.com> <CAD6AjGQtSzdTtOZm-0=1A0ndCPf2aYyUjh8c8npLX-QgomrDJw@mail.gmail.com> <377fe961-c11c-de2d-35dd-6be8478a94b3@asgard.org> <DC5325E3-C4D9-4341-98FB-E1EB93EA375C@consulintel.es> <405c3498-7159-6888-d756-f72346cb188d@asgard.org>
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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--B_3611838042_2138395074
Content-type: text/plain;
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=20

I recall Windows Update 10 also has included CLAT support. I=E2=80=99m sure=
 this will happen more and more in different OSs, as it makes a lot of sens=
e in networks that may already have NAT64.


You think? Like game console OSs and thermostat OSs and stereo OSs and TV O=
Ss?=20



No, I mean desktop/tablet OSs (Windows, Linux, Chrome OS, iOS, Android). It=
 makes a lot of sense specially for devices that are =E2=80=9Cportable=E2=
=80=9D and in fact that=E2=80=99s the idea behind Windows 10 Update. If you=
 can use that device in a cellular IPv6-only network, should be expected th=
at in a WiFi or wired IPv6-only network is behaving the same way when no na=
tive IPv4 is available. The other kind of OSs that you mention should eithe=
r have already IPv6-only or rely in the CPE to provide IPv4 if they really =
need that.

=20

I don=E2=80=99t think that will happen with MAP or DS-Lite (I mean having t=
hose in the OSs).


Ew, I hope not, that's the wrong place to implement those. I suppose I coul=
d imagine using a softwire as a VPN assuming IPv6--no, no I can't imagine i=
t.



Yes, as a VPN client, it may be, but hopefully not as something by default =
in the OS.

=20

If we are pushing for IPv6-only enterprise networks, the CLAT will be also =
the way to ensure that old apps work, if the enterprise router don=E2=80=99=
t have the CLAT already enabled.

=20

Another important aspect, in my opinion, is that the implementation of CLAT=
, even for a CPE, it is the much simpler one compared with any other one.


That only matters if it actually gets implemented. "Easy" and "done" are di=
fferent.

You've said that home gateway vendors by and large have code for all of the=
 mechanisms already written, so I'm not sure ease is essential.


Yeah, talked to many, they often provide whatever you need if the order is =
big, our problem is still the retail market or orders to vendors that don=
=E2=80=99t have sufficient amount to demand a specific firmware feature set=
.

=20

Code required for each transition in OpenWRT (it may be quite similar in ot=
her implementations):

=20

DS-Lite=C2=A0=C2=A0 15 Kbytes

464XLAT 17 Kbytes

MAP-E =C2=A0=C2=A0=C2=A035 Kbytes

LW4o6 =C2=A0=C2=A035 Kbytes

MAP-T =C2=A0=C2=A048 Kbytes

=20

If *all* them are implemented: 53 Kbytes (there are many =E2=80=9Cshared=E2=
=80=9D modules among them, same data plane, etc.).


There are other drivers here, and while I have no concerns about 464xlat, I=
 also am not ready to crown it the winner.=20

=20

I bet a dinner =E2=80=A6 Cellular is too powerful and they made the decisio=
n long time ago.



Lee
=20


Regarsd,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lee Howard <lee@asgard.org>
Fecha: jueves, 14 de junio de 2018, 15:16
Para: <v6ops@ietf.org>
Asunto: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really=
 inferior to all other IPv6 transition technologies? -- Re: updating RFC802=
6 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas

=20

=20

=20

On 06/14/2018 08:12 AM, Ca By wrote:

=20

=20

On Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti <lorenzo=3D40google.com@dma=
rc.ietf.org> wrote:

On Thu, Jun 14, 2018 at 7:28 PM <nick.heatley@bt.com> wrote:

=20

=20

Oh, I definitely agree that 464xlat has it's place. I maintain a popular im=
plementation of it :-)

=20

I'm just saying it's not the best solution for a wireline network.=20

=20

Perhaps.=20

=20

The market for ipv6-only transition, afaik, is won by ds-lite and 464xlat.=
=20

=20

Afaik, there is not a large production stateless MAP implementation, and th=
is market is fairly mature. That said, at this point, the theoretical advan=
tage of stateless has failed to materialize in real world deployment ... wh=
ile the stateful solutions keep gaining share.=20

=20



Crowd-sourced list of transition technologies various carriers have deploye=
d: https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO=
_7NK9vcVApc/edit#gid=3D0

I see several that have deployed MAP.=20

I speculate that DS-Lite and NAT64 had early mover advantage (i.e., early d=
evelopment), and were the only game in town. 464xlat only has that advantag=
e in mobile, since handsets are the only major CLAT implementation.=20

I think it's too soon to declare winners.

Lee



_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20


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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><blockquote style=3D'=
margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal style=3D'margin-=
left:35.4pt'><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>I reca=
ll Windows Update 10 also has included CLAT support. I=E2=80=99m sure this =
will happen more and more in different OSs, as it makes a lot of sense in n=
etworks that may already have NAT64.</span><o:p></o:p></p></blockquote><p c=
lass=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3DEN-US><br>You th=
ink? Like game console OSs and thermostat OSs and stereo OSs and TV OSs? <b=
r><br><br><o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>No,=
 I mean desktop/tablet OSs (Windows, Linux, Chrome OS, iOS, Android). It ma=
kes a lot of sense specially for devices that are =E2=80=9Cportable=E2=80=
=9D and in fact that=E2=80=99s the idea behind Windows 10 Update. If you ca=
n use that device in a cellular IPv6-only network, should be expected that =
in a WiFi or wired IPv6-only network is behaving the same way when no nativ=
e IPv4 is available. The other kind of OSs that you mention should either h=
ave already IPv6-only or rely in the CPE to provide IPv4 if they really nee=
d that.<o:p></o:p></span></p><blockquote style=3D'margin-top:5.0pt;margin-b=
ottom:5.0pt'><p class=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=
=3DEN-US style=3D'mso-fareast-language:EN-US'>&nbsp;</span><span lang=3DEN-=
US><o:p></o:p></span></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'>=
<span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>I don=E2=80=99t thi=
nk that will happen with MAP or DS-Lite (I mean having those in the OSs).</=
span><o:p></o:p></p></blockquote><p class=3DMsoNormal style=3D'margin-left:=
35.4pt'><br>Ew, I hope not, that's the wrong place to implement those. I su=
ppose I could imagine using a softwire as a VPN assuming IPv6--no, no I can=
't imagine it.<br><br><br><o:p></o:p></p><p class=3DMsoNormal><span lang=3D=
EN-US>Yes, as a VPN client, it may be, but hopefully not as something by de=
fault in the OS.<o:p></o:p></span></p><blockquote style=3D'margin-top:5.0pt=
;margin-bottom:5.0pt'><p class=3DMsoNormal style=3D'margin-left:35.4pt'><sp=
an lang=3DEN-US style=3D'mso-fareast-language:EN-US'>&nbsp;</span><span lan=
g=3DEN-US><o:p></o:p></span></p><p class=3DMsoNormal style=3D'margin-left:3=
5.4pt'><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>If we are pu=
shing for IPv6-only enterprise networks, the CLAT will be also the way to e=
nsure that old apps work, if the enterprise router don=E2=80=99t have the C=
LAT already enabled.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mar=
gin-left:35.4pt'><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>&n=
bsp;</span><o:p></o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'=
><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>Another important =
aspect, in my opinion, is that the implementation of CLAT, even for a CPE, =
it is the much simpler one compared with any other one.</span><o:p></o:p></=
p></blockquote><p class=3DMsoNormal style=3D'margin-left:35.4pt'><br>That o=
nly matters if it actually gets implemented. &quot;Easy&quot; and &quot;don=
e&quot; are different.<br><br>You've said that home gateway vendors by and =
large have code for all of the mechanisms already written, so I'm not sure =
ease is essential.<br><br><o:p></o:p></p><p class=3DMsoNormal><span lang=3D=
EN-US>Yeah, talked to many, they often provide whatever you need if the ord=
er is big, our problem is still the retail market or orders to vendors that=
 don=E2=80=99t have sufficient amount to demand a specific firmware feature=
 set.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US><o:p>&nb=
sp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>Code required f=
or each transition in OpenWRT (it may be quite similar in other implementat=
ions):<o:p></o:p></span></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p cl=
ass=3DMsoNormal>DS-Lite=C2=A0=C2=A0 15 Kbytes<o:p></o:p></p><p class=3DMsoN=
ormal><span lang=3DEN-US>464XLAT 17 Kbytes</span><span lang=3DEN-US><o:p></=
o:p></span></p><p class=3DMsoNormal>MAP-E =C2=A0=C2=A0=C2=A035 Kbytes<o:p><=
/o:p></p><p class=3DMsoNormal>LW4o6 =C2=A0=C2=A035 Kbytes<o:p></o:p></p><p =
class=3DMsoNormal>MAP-T =C2=A0=C2=A048 Kbytes<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp=
;</o:p></p><p class=3DMsoNormal><span lang=3DEN-US>If *all* them are implem=
ented: 53 Kbytes (there are many =E2=80=9Cshared=E2=80=9D modules among the=
m, same data plane, etc.).<o:p></o:p></span></p><p class=3DMsoNormal style=
=3D'margin-left:35.4pt'><span lang=3DEN-US><br>There are other drivers here=
, and while I have no concerns about 464xlat, I also am not ready to crown =
it the winner. <o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-U=
S><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US>I bet=
 a dinner =E2=80=A6 Cellular is too powerful and they made the decision lon=
g time ago.<o:p></o:p></span></p><p class=3DMsoNormal style=3D'margin-left:=
35.4pt'><span lang=3DEN-US><br><br></span>Lee<br>&nbsp;<br><br><o:p></o:p><=
/p><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=
=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3DEN-US style=3D'font-=
size:10.5pt;color:black'><br>Regarsd,</span><o:p></o:p></p><p class=3DMsoNo=
rmal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;=
margin-left:35.4pt'><span lang=3DEN-US style=3D'font-size:10.5pt;color:blac=
k;mso-fareast-language:EN-US'>Jordi</span><o:p></o:p></p><p class=3DMsoNorm=
al style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;ma=
rgin-left:35.4pt'><span lang=3DEN-US style=3D'font-size:10.5pt;color:black;=
mso-fareast-language:EN-US'>&nbsp;</span><o:p></o:p></p></div><p class=3DMs=
oNormal style=3D'margin-left:35.4pt'><span lang=3DEN-US style=3D'mso-fareas=
t-language:EN-US'>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal style=3D=
'margin-left:35.4pt'><span lang=3DEN-US style=3D'mso-fareast-language:EN-US=
'>&nbsp;</span><o:p></o:p></p><div style=3D'border:none;border-top:solid #B=
5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal style=3D'margin=
-left:70.8pt'><b><span style=3D'font-size:12.0pt;color:black'>De: </span></=
b><span style=3D'font-size:12.0pt;color:black'>v6ops <a href=3D"mailto:v6op=
s-bounces@ietf.org">&lt;v6ops-bounces@ietf.org&gt;</a> en nombre de Lee How=
ard <a href=3D"mailto:lee@asgard.org">&lt;lee@asgard.org&gt;</a><br><b>Fech=
a: </b>jueves, 14 de junio de 2018, 15:16<br><b>Para: </b><a href=3D"mailto=
:v6ops@ietf.org">&lt;v6ops@ietf.org&gt;</a><br><b>Asunto: </b>Re: [v6ops] D=
isadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all othe=
r IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT =
in draft-ietf-v6ops-transition-ipv4aas</span><o:p></o:p></p></div><div><p c=
lass=3DMsoNormal style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div><p=
 style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></p><p class=3DMsoNormal sty=
le=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></p><div><p class=3DMsoNormal st=
yle=3D'margin-left:70.8pt'>On 06/14/2018 08:12 AM, Ca By wrote:<o:p></o:p><=
/p></div><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><div><p=
 class=3DMsoNormal style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div>=
<div><p class=3DMsoNormal style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></p=
><div><div><p class=3DMsoNormal style=3D'margin-left:70.8pt'>On Thu, Jun 14=
, 2018 at 3:31 AM Lorenzo Colitti &lt;lorenzo=3D<a href=3D"mailto:40google.=
com@dmarc.ietf.org">40google.com@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></=
p></div><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;pa=
dding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm=
;margin-bottom:5.0pt'><div><div><div><p class=3DMsoNormal style=3D'margin-l=
eft:70.8pt'>On Thu, Jun 14, 2018 at 7:28 PM &lt;<a href=3D"mailto:nick.heat=
ley@bt.com" target=3D"_blank">nick.heatley@bt.com</a>&gt; wrote:<o:p></o:p>=
</p></div><blockquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;=
padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0=
cm;margin-bottom:5.0pt'><div><div><p class=3DMsoNormal style=3D'margin-left=
:70.8pt'><span lang=3DEN-GB>&nbsp;</span><o:p></o:p></p></div></div></block=
quote><div><p class=3DMsoNormal style=3D'margin-left:70.8pt'>&nbsp;<o:p></o=
:p></p></div></div></div><div><div><div><p class=3DMsoNormal style=3D'margi=
n-left:70.8pt'>Oh, I definitely agree that 464xlat has it's place. I mainta=
in a popular implementation of it :-)<o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></p><=
/div><div><p class=3DMsoNormal style=3D'margin-left:70.8pt'>I'm just saying=
 it's not the best solution for a wireline network.&nbsp;<o:p></o:p></p></d=
iv></div></div></blockquote><div><p class=3DMsoNormal style=3D'margin-left:=
70.8pt'>&nbsp;<o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'margi=
n-left:70.8pt'>Perhaps.&nbsp;<o:p></o:p></p></div><div><p class=3DMsoNormal=
 style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div><div><p class=3DMs=
oNormal style=3D'margin-left:70.8pt'>The market for ipv6-only transition, a=
faik, is won by ds-lite and 464xlat.&nbsp;<o:p></o:p></p></div><div><p clas=
s=3DMsoNormal style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div><div>=
<p class=3DMsoNormal style=3D'margin-left:70.8pt'>Afaik, there is not a lar=
ge production stateless MAP implementation, and this market is fairly matur=
e. That said, at this point, the theoretical advantage of stateless has fai=
led to materialize in real world deployment ... while the stateful solution=
s keep gaining share.&nbsp;<o:p></o:p></p></div><div><p class=3DMsoNormal s=
tyle=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div></div></div></blockq=
uote><p class=3DMsoNormal style=3D'margin-left:70.8pt'><br><br>Crowd-source=
d list of transition technologies various carriers have deployed: <a href=
=3D"https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNO=
O_7NK9vcVApc/edit#gid=3D0">https://docs.google.com/spreadsheets/d/1ksOoWOaR=
dRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=3D0</a><br><br>I see several t=
hat have deployed MAP. <br><br>I speculate that DS-Lite and NAT64 had early=
 mover advantage (i.e., early development), and were the only game in town.=
 464xlat only has that advantage in mobile, since handsets are the only maj=
or CLAT implementation. <br><br>I think it's too soon to declare winners.<b=
r><br>Lee<br><br><br><br>_______________________________________________ v6=
ops mailing list <a href=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a> <a hr=
ef=3D"https://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mai=
lman/listinfo/v6ops</a> <o:p></o:p></p><p class=3DMsoNormal style=3D'mso-ma=
rgin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt'>=
<br>**********************************************<br>IPv4 is over<br>Are y=
ou ready for the new Internet ?<br><a href=3D"http://www.consulintel.es">ht=
tp://www.consulintel.es</a><br>The IPv6 Company<br><br>This electronic mess=
age contains information which may be privileged or confidential. The infor=
mation is intended to be for the exclusive use of the individual(s) named a=
bove and further non-explicilty authorized disclosure, copying, distributio=
n or use of the contents of this information, even if partially, including =
attached files, is strictly prohibited and will be considered a criminal of=
fense. If you are not the intended recipient be aware that any disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited, will be conside=
red a criminal offense, so you must reply to the original sender to inform =
about this communication and delete it.<o:p></o:p></p></blockquote><p class=
=3DMsoNormal style=3D'margin-left:35.4pt'><br><br><o:p></o:p></p></div><br>=
**********************************************<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
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In-Reply-To: <D8C2AF9B-45FD-48CE-AFDE-D6EF651936A4@consulintel.es>
From: Lorenzo Colitti <lorenzo@google.com>
Date: Fri, 15 Jun 2018 00:39:09 +0900
Message-ID: <CAKD1Yr1Kc1JENfQ3pv5mREo-67rOqJaFLKqV4DuM-8UfaQ2FOQ@mail.gmail.com>
To: jordi.palet=40consulintel.es@dmarc.ietf.org
Cc: Lee Howard <lee@asgard.org>, "v6ops@ietf.org WG" <v6ops@ietf.org>
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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On Thu, Jun 14, 2018 at 11:21 PM JORDI PALET MARTINEZ <jordi.palet=3D
40consulintel.es@dmarc.ietf.org> wrote:

> There are other drivers here, and while I have no concerns about 464xlat,
> I also am not ready to crown it the winner.
>
>
>
> I bet a dinner =E2=80=A6 Cellular is too powerful and they made the decis=
ion long
> time ago.
>

Actually, the real solution for mobile is true IPv6-only with NAT64. Mobile
is going to get there much faster than wireline, There's not that far much
left to do (Apple has already done it), and handsets are much more under
the control of carriers and churn so much more quickly.

--00000000000049c912056e9be7a6
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<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu, Jun 14=
, 2018 at 11:21 PM JORDI PALET MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto=
:40consulintel.es@dmarc.ietf.org">40consulintel.es@dmarc.ietf.org</a>&gt; w=
rote:</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bor=
der-left:1px #ccc solid;padding-left:1ex"><div lang=3D"ES" link=3D"blue" vl=
ink=3D"purple"><div class=3D"m_-8713110811567790965WordSection1"><p class=
=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D"EN-US">There are =
other drivers here, and while I have no concerns about 464xlat, I also am n=
ot ready to crown it the winner. <u></u><u></u></span></p><p class=3D"MsoNo=
rmal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNo=
rmal"><span lang=3D"EN-US">I bet a dinner =E2=80=A6 Cellular is too powerfu=
l and they made the decision long time ago.</span></p></div></div></blockqu=
ote><div><br></div><div>Actually, the real solution for mobile is true IPv6=
-only with NAT64. Mobile is going to get there much faster than wireline, T=
here&#39;s not that far much left to do (<span style=3D"background-color:rg=
b(255,255,255);text-decoration-style:initial;text-decoration-color:initial;=
float:none;display:inline">Apple has already done it), and=C2=A0</span>hand=
sets are much more under the control of carriers and churn so much more qui=
ckly.</div></div></div>

--00000000000049c912056e9be7a6--


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Date: Thu, 14 Jun 2018 17:43:40 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>
CC: Lee Howard <lee@asgard.org>, "v6ops@ietf.org WG" <v6ops@ietf.org>
Message-ID: <ED33CFE7-0250-4ED2-8D9D-B14D070FEFB0@consulintel.es>
Thread-Topic: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <CAKD1Yr1_NeLyAmdAJitd=jUKeY0kW8qxV_9FWGCbNf1__ppecw@mail.gmail.com> <018DD24B-DD2F-4B31-A939-328173891F3E@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <da095b32-3bb9-d2ec-dd41-e6e526cff83f@hit.bme.hu> <CAKD1Yr3ZbOLbsXFmZqa78ZJ9aaiFnCxAPUVOX26=VoqChA1g-A@mail.gmail.com> <7eb46aa1-699a-7397-d0d9-51d1160b4148@hit.bme.hu> <671083EC-62E4-44ED-91AD-EBD0DFB086F6@employees.org> <CAKD1Yr0BJWveM966+=bdRK+6OSA1aALM0yN4QeRNgg9HVpA4xQ@mail.gmail.com> <LO1P123MB009872BA45A52D18819FF3A6EA7D0@LO1P123MB0098.GBRP123.PROD.OUTLOOK.COM> <CAKD1Yr3O7qY+N07_=XyFmWSjJW5rzmgEZbpwC9rNVBJYmxyLsA@mail.gmail.com> <CAD6AjGQtSzdTtOZm-0=1A0ndCPf2aYyUjh8c8npLX-QgomrDJw@mail.gmail.com> <377fe961-c11c-de2d-35dd-6be8478a94b3@asgard.org> <DC5325E3-C4D9-4341-98FB-E1EB93EA375C@consulintel.es> <405c3498-7159-6888-d756-f72346cb188d@asgard.org> <D8C2AF9B-45FD-48CE-AFDE-D6EF651936A4@consulintel.es> <CAKD1Yr1Kc1JENfQ3pv5mREo-67rOqJaFLKqV4DuM-8UfaQ2FOQ@mail.gmail.com>
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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But, and is a big but, for tethering the CLAT is needed, otherwise the oper=
ator need to provide also an IPv4v6 PDP context just for the tethering.

=20

This is the actual complain from many operators with iOS, which is sorted o=
ut in Android and Windows with the CLAT.

=20

At least while some devices are IPv4-only and people need to use them with =
tethering.


Regards,

Jordi

=20

=20

=20

De: Lorenzo Colitti <lorenzo=3D40google.com@dmarc.ietf.org>
Fecha: jueves, 14 de junio de 2018, 17:39
Para: <jordi.palet@consulintel.es>
CC: Lee Howard <lee@asgard.org>, "v6ops@ietf.org WG" <v6ops@ietf.org>
Asunto: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really=
 inferior to all other IPv6 transition technologies? -- Re: updating RFC802=
6 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas

=20

On Thu, Jun 14, 2018 at 11:21 PM JORDI PALET MARTINEZ <jordi.palet=3D40cons=
ulintel.es@dmarc.ietf.org> wrote:

There are other drivers here, and while I have no concerns about 464xlat, I=
 also am not ready to crown it the winner.=20

=20

I bet a dinner =E2=80=A6 Cellular is too powerful and they made the decisio=
n long time ago.

=20

Actually, the real solution for mobile is true IPv6-only with NAT64. Mobile=
 is going to get there much faster than wireline, There's not that far much=
 left to do (Apple has already done it), and handsets are much more under t=
he control of carriers and churn so much more quickly.



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
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<html xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sc=
hemas-microsoft-com:office:word" xmlns:m=3D"http://schemas.microsoft.com/of=
fice/2004/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta ht=
tp-equiv=3DContent-Type content=3D"text/html; charset=3Dutf-8"><meta name=
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ordSection1><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-la=
nguage:EN-US'>But, and is a big but, for tethering the CLAT is needed, othe=
rwise the operator need to provide also an IPv4v6 PDP context just for the =
tethering.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US sty=
le=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMs=
oNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>This is the=
 actual complain from many operators with iOS, which is sorted out in Andro=
id and Windows with the CLAT.<o:p></o:p></span></p><p class=3DMsoNormal><sp=
an lang=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></spa=
n></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language=
:EN-US'>At least while some devices are IPv4-only and people need to use th=
em with tethering.<o:p></o:p></span></p><div><p class=3DMsoNormal><span lan=
g=3DEN-US style=3D'font-size:10.5pt;color:black'><br></span><span lang=3DES=
-TRAD style=3D'font-size:10.5pt;color:black'>Regards,<o:p></o:p></span></p>=
<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD st=
yle=3D'font-size:10.5pt;color:black;mso-fareast-language:EN-US'>Jordi<o:p><=
/o:p></span></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span l=
ang=3DES-TRAD style=3D'font-size:10.5pt;color:black;mso-fareast-language:EN=
-US'><o:p>&nbsp;</o:p></span></p></div><p class=3DMsoNormal><span lang=3DES=
-TRAD style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p c=
lass=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-fareast-language:EN-US'>=
<o:p>&nbsp;</o:p></span></p><div style=3D'border:none;border-top:solid #B5C=
4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal style=3D'margin-l=
eft:35.4pt'><b><span style=3D'font-size:12.0pt;color:black'>De: </span></b>=
<span style=3D'font-size:12.0pt;color:black'>Lorenzo Colitti &lt;lorenzo=3D=
40google.com@dmarc.ietf.org&gt;<br><b>Fecha: </b>jueves, 14 de junio de 201=
8, 17:39<br><b>Para: </b>&lt;jordi.palet@consulintel.es&gt;<br><b>CC: </b>L=
ee Howard &lt;lee@asgard.org&gt;, &quot;v6ops@ietf.org WG&quot; &lt;v6ops@i=
etf.org&gt;<br><b>Asunto: </b>Re: [v6ops] Disadvantages of MAP protocols --=
 Re: Is 464XLAT really inferior to all other IPv6 transition technologies? =
-- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-i=
pv4aas<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin=
-left:35.4pt'><o:p>&nbsp;</o:p></p></div><div><div><div><p class=3DMsoNorma=
l style=3D'margin-left:35.4pt'>On Thu, Jun 14, 2018 at 11:21 PM JORDI PALET=
 MARTINEZ &lt;jordi.palet=3D<a href=3D"mailto:40consulintel.es@dmarc.ietf.o=
rg">40consulintel.es@dmarc.ietf.org</a>&gt; wrote:<o:p></o:p></p></div><blo=
ckquote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0c=
m 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p class=3DMsoNor=
mal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left=
:70.8pt'><span lang=3DEN-US>There are other drivers here, and while I have =
no concerns about 464xlat, I also am not ready to crown it the winner. </sp=
an><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso=
-margin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>&nbsp;</span=
><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-m=
argin-bottom-alt:auto;margin-left:35.4pt'><span lang=3DEN-US>I bet a dinner=
 =E2=80=A6 Cellular is too powerful and they made the decision long time ag=
o.</span><o:p></o:p></p></div></div></blockquote><div><p class=3DMsoNormal =
style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div><div><p class=3DMso=
Normal style=3D'margin-left:35.4pt'>Actually, the real solution for mobile =
is true IPv6-only with NAT64. Mobile is going to get there much faster than=
 wireline, There's not that far much left to do (<span style=3D'background:=
white'>Apple has already done it), and&nbsp;</span>handsets are much more u=
nder the control of carriers and churn so much more quickly.<o:p></o:p></p>=
</div></div></div></div><br>**********************************************<=
br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
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Thread-Topic: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/TwufT4ggS8OOdzCGkFJkAajNpxk>
Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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From nobody Thu Jun 14 09:22:04 2018
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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: <v6ops@ietf.org>, <softwires@ietf.org>, <dhcwg@ietf.org>
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Thread-Topic: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Subject: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Hi all,



After a long chat with the authors of RFC8026, we have found an alternative solution which avoids updating RFC8026 and also avoids requiring a new option code for 464XLAT, as there is already one that we can use, which is related to NAT64, so still can use RFC8026 for our original intend of prioritizing and managing the available mechanism from the operator network.



Consequently, we are working in a new version of draft-ietf-v6ops-transition-ipv4aas, which will be posted ASAP in v6ops.



Anyway, we had lot of fun in v6ops because this, and I think every comment has been very useful!



Thanks!



Regards,

Jordi

 

 




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From nobody Thu Jun 14 09:54:55 2018
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Fred Baker <fredbaker.ietf@gmail.com>
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Thread-Topic: [v6ops] IETF 102 Agenda
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Hi Fred,

I went carefully over all of the comments received since IETF101 and have s=
ubmitted a
-21 revision that I think should satisfy the comments raised (see below). H=
ere is the
changelog:

---
   Changes from -20to -21:

   o  Re-worked classic routing model section

   o  Included multi-addressing case where addresses may be assigned to
      applications

   o  Removed strong/weak end system discussions
---

I also changed the title to "Multi-Addressing Considerations for IPv6 Prefi=
x Delegation"
because the focus is really on multi-addressing considerations in the prese=
nce of
prefix delegation and not as much on prefix delegation "models".

Please consider this version for presentation at IETF102.

Thanks - Fred
fred.l.templin@boeing.com

----
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.


        Title           : Multi-Addressing Considerations for IPv6 Prefix D=
elegation
        Author          : Fred L. Templin
	Filename        : draft-templin-v6ops-pdhost-21.txt
	Pages           : 14
	Date            : 2018-06-14

Abstract:
   IPv6 prefixes are typically delegated to requesting routers which
   assign them to their downstream-attached links and networks.  The
   requesting node can provision the prefix according to whether it acts
   as a router on behalf of any downstream networks and/or as a host on
   behalf of its local applications.  In the latter case, the requesting
   node can use portions of the delegated prefix for its own multi-
   addressing purposes.  This document therefore considers prefix
   delegation consideations for both the classic routing and various
   multi-addressing use cases.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-templin-v6ops-pdhost/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-templin-v6ops-pdhost-21
https://datatracker.ietf.org/doc/html/draft-templin-v6ops-pdhost-21

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=3Ddraft-templin-v6ops-pdhost-21

> -----Original Message-----
> From: Fred Baker [mailto:fredbaker.ietf@gmail.com]
> Sent: Monday, June 11, 2018 11:47 AM
> To: Templin (US), Fred L <Fred.L.Templin@boeing.com>
> Cc: v6ops@ietf.org list <v6ops@ietf.org>
> Subject: Re: [v6ops] IETF 102 Agenda
>=20
> On Jun 11, 2018, at 9:59 AM, Templin (US), Fred L <Fred.L.Templin@boeing.=
com> wrote:
> > Hi Fred,
> >
> > 'draft-templin-v6ops-pdhost' has been updated, and received list traffi=
c both
> > before and after the update was posted. Please add to the agenda.
> >
> > Thanks - Fred
>=20
> Hi. I'm looking at the discussion post-IETF-101, and looking for someone =
saying "I support this draft. I think it describes something I
> want to deploy in my network." This is an operational working group; I'm =
looking especially for comments from network operators.
> This is a discussion you and I have had a number of times. What the chair=
s want to give agenda time to is drafts that the working group
> participants find useful and interesting. We gauge that from list discuss=
ion. So it's not "number of comments, when comments are
> specifically solicited, exceed zero", but "someone said it was useful and=
 interesting in their deployment".
>=20
> Since IETF 101, we have had two threads on the subject of pdhost. I initi=
ated "let's discuss this" in late April:
> https://www.ietf.org/mail-archive/web/v6ops/current/msg29222.html.
>=20
> In that thread, we had comments from
>   - Dusan Medric, who wondered whether there was a discussion of allocati=
ng a prefix (such as a /64) to a host,
>   - Joe Touch, Mark Smith, and Ole Troan regarding the distinction a "wea=
k" and a "strong" host and between a "platform", a "router",
> a "host", and a "node", and
>   - Alexandre Petrescu, on the utility in his IOT MIPv6 network.
>=20
> I initiated another after your update on 29 May (https://www.ietf.org/mai=
l-archive/web/v6ops/current/msg29275.html). In that, you
> and Alexandre Petrescu discussed the utility of this in his IOT environme=
nt, in which he wanted to use RFC 3633 to delegate a prefix to
> an IOT router for use in an enclave in his network. You and he disagreed =
on what was to be done with the delegated prefix.
>=20
> I'm still looking for a comment from a working group participant saying s=
/he finds draft-templin-v6ops-pdhost, in its 21st revision,
> "useful and interesting". What I see is 14 emails since IETF 101, many of=
 which you responded to, from people who fundamentally
> disagreed with you on one point or another.
>=20
> General comment to those on the CC line: if this draft describes somethin=
g useful to you in your network, your comment can
> dramatically change the conversation between Fred and myself.


From nobody Thu Jun 14 10:34:05 2018
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To: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>, v6ops@ietf.org
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From: Lee Howard <lee@asgard.org>
Message-ID: <8a4ddec8-6d43-b59d-f685-69b0295ac38b@asgard.org>
Date: Thu, 14 Jun 2018 13:33:54 -0400
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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On 06/14/2018 10:20 AM, JORDI PALET MARTINEZ wrote:
>
>     I recall Windows Update 10 also has included CLAT support. I’m
>     sure this will happen more and more in different OSs, as it makes
>     a lot of sense in networks that may already have NAT64.
>
>
> You think? Like game console OSs and thermostat OSs and stereo OSs and 
> TV OSs?
>
>
> No, I mean desktop/tablet OSs (Windows, Linux, Chrome OS, iOS, 
> Android). It makes a lot of sense specially for devices that are 
> “portable” and in fact that’s the idea behind Windows 10 Update. If 
> you can use that device in a cellular IPv6-only network, should be 
> expected that in a WiFi or wired IPv6-only network is behaving the 
> same way when no native IPv4 is available. The other kind of OSs that 
> you mention should either have already IPv6-only or rely in the CPE to 
> provide IPv4 if they really need that.
>

"Or rely on the CPE" is my point. They don't have IPv6 in the OS now, so 
they need whatever the home gateway provides. No transition mechanisms 
are widespread in retail gateways; DS-Lite more than others. So we're 
waiting to see what goes into retail gateways.
Meanwhile, manufacturers are asking ISP customers what they want. You 
keep hearing that ISPs want 464xlat or lw4over6, and I keep hearing MAP.

BUT it would be cool if game consoles did deploy CLAT, and provide a 
translation layer for games that only know IPv4. I don't know the 
architecture well enough to know whether that would work,

Also, tethering behind an IPv6-only phone is still no problem if you 
have Windows 10 and a NAT64 server, apparently: just fire up the CLAT.

>
> That only matters if it actually gets implemented. "Easy" and "done" 
> are different.
>
> You've said that home gateway vendors by and large have code for all 
> of the mechanisms already written, so I'm not sure ease is essential.
>
> Yeah, talked to many, they often provide whatever you need if the 
> order is big, our problem is still the retail market or orders to 
> vendors that don’t have sufficient amount to demand a specific 
> firmware feature set.
>
> Code required for each transition in OpenWRT (it may be quite similar 
> in other implementations):
>
> DS-Lite   15 Kbytes
>
> 464XLAT 17 Kbytes
>
> MAP-E    35 Kbytes
>
> LW4o6   35 Kbytes
>
> MAP-T   48 Kbytes
>
> If *all* them are implemented: 53 Kbytes (there are many “shared” 
> modules among them, same data plane, etc.).
>
>
> There are other drivers here, and while I have no concerns about 
> 464xlat, I also am not ready to crown it the winner.
>
> I bet a dinner … Cellular is too powerful and they made the decision 
> long time ago.
>

What's the decision criterion? :)
Mobile is huge, but has little influence on wireline. And most of them 
(globally) are still on dual stack.

Lee
>
>
>
> Lee
>
>
>
>     Regarsd,
>
>     Jordi
>
>     *De: *v6ops <v6ops-bounces@ietf.org>
>     <mailto:v6ops-bounces@ietf.org> en nombre de Lee Howard
>     <lee@asgard.org> <mailto:lee@asgard.org>
>     *Fecha: *jueves, 14 de junio de 2018, 15:16
>     *Para: *<v6ops@ietf.org> <mailto:v6ops@ietf.org>
>     *Asunto: *Re: [v6ops] Disadvantages of MAP protocols -- Re: Is
>     464XLAT really inferior to all other IPv6 transition technologies?
>     -- Re: updating RFC8026 to support 464XLAT in
>     draft-ietf-v6ops-transition-ipv4aas
>
>     On 06/14/2018 08:12 AM, Ca By wrote:
>
>         On Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti
>         <lorenzo=40google.com@dmarc.ietf.org
>         <mailto:40google.com@dmarc.ietf.org>> wrote:
>
>             On Thu, Jun 14, 2018 at 7:28 PM <nick.heatley@bt.com
>             <mailto:nick.heatley@bt.com>> wrote:
>
>             Oh, I definitely agree that 464xlat has it's place. I
>             maintain a popular implementation of it :-)
>
>             I'm just saying it's not the best solution for a wireline
>             network.
>
>         Perhaps.
>
>         The market for ipv6-only transition, afaik, is won by ds-lite
>         and 464xlat.
>
>         Afaik, there is not a large production stateless MAP
>         implementation, and this market is fairly mature. That said,
>         at this point, the theoretical advantage of stateless has
>         failed to materialize in real world deployment ... while the
>         stateful solutions keep gaining share.
>
>
>
>     Crowd-sourced list of transition technologies various carriers
>     have deployed:
>     https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=0
>
>     I see several that have deployed MAP.
>
>     I speculate that DS-Lite and NAT64 had early mover advantage
>     (i.e., early development), and were the only game in town. 464xlat
>     only has that advantage in mobile, since handsets are the only
>     major CLAT implementation.
>
>     I think it's too soon to declare winners.
>
>     Lee
>
>
>
>     _______________________________________________ v6ops mailing list
>     v6ops@ietf.org <mailto:v6ops@ietf.org>
>     https://www.ietf.org/mailman/listinfo/v6ops
>
>
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>
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> The IPv6 Company
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> authorized disclosure, copying, distribution or use of the contents of 
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> are not the intended recipient be aware that any disclosure, copying, 
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    <br>
    <div class="moz-cite-prefix">On 06/14/2018 10:20 AM, JORDI PALET
      MARTINEZ wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:D8C2AF9B-45FD-48CE-AFDE-D6EF651936A4@consulintel.es">
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        <p class="MsoNormal"><o:p> </o:p></p>
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          <p class="MsoNormal" style="margin-left:35.4pt"><span
              style="mso-fareast-language:EN-US" lang="EN-US">I recall
              Windows Update 10 also has included CLAT support. I’m sure
              this will happen more and more in different OSs, as it
              makes a lot of sense in networks that may already have
              NAT64.</span><o:p></o:p></p>
        </blockquote>
        <p class="MsoNormal" style="margin-left:35.4pt"><span
            lang="EN-US"><br>
            You think? Like game console OSs and thermostat OSs and
            stereo OSs and TV OSs? <br>
            <br>
            <br>
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">No, I mean
            desktop/tablet OSs (Windows, Linux, Chrome OS, iOS,
            Android). It makes a lot of sense specially for devices that
            are “portable” and in fact that’s the idea behind Windows 10
            Update. If you can use that device in a cellular IPv6-only
            network, should be expected that in a WiFi or wired
            IPv6-only network is behaving the same way when no native
            IPv4 is available. The other kind of OSs that you mention
            should either have already IPv6-only or rely in the CPE to
            provide IPv4 if they really need that.</span></p>
      </div>
    </blockquote>
    <br>
    "Or rely on the CPE" is my point. They don't have IPv6 in the OS
    now, so they need whatever the home gateway provides. No transition
    mechanisms are widespread in retail gateways; DS-Lite more than
    others. So we're waiting to see what goes into retail gateways.<br>
    Meanwhile, manufacturers are asking ISP customers what they want.
    You keep hearing that ISPs want 464xlat or lw4over6, and I keep
    hearing MAP.<br>
    <br>
    BUT it would be cool if game consoles did deploy CLAT, and provide a
    translation layer for games that only know IPv4. I don't know the
    architecture well enough to know whether that would work,<br>
    <br>
    Also, tethering behind an IPv6-only phone is still no problem if you
    have Windows 10 and a NAT64 server, apparently: just fire up the
    CLAT.<br>
    <br>
    <p class="MsoNormal" style="margin-left:35.4pt"><span
        style="mso-fareast-language:EN-US" lang="EN-US"></span><o:p></o:p></p>
    <blockquote type="cite"
      cite="mid:D8C2AF9B-45FD-48CE-AFDE-D6EF651936A4@consulintel.es">
      <div class="WordSection1">
        <p class="MsoNormal" style="margin-left:35.4pt"><br>
          That only matters if it actually gets implemented. "Easy" and
          "done" are different.<br>
          <br>
          You've said that home gateway vendors by and large have code
          for all of the mechanisms already written, so I'm not sure
          ease is essential.<br>
          <br>
          <o:p></o:p></p>
        <p class="MsoNormal"><span lang="EN-US">Yeah, talked to many,
            they often provide whatever you need if the order is big,
            our problem is still the retail market or orders to vendors
            that don’t have sufficient amount to demand a specific
            firmware feature set.<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">Code required for each
            transition in OpenWRT (it may be quite similar in other
            implementations):<o:p></o:p></span></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">DS-Lite   15 Kbytes<o:p></o:p></p>
        <p class="MsoNormal"><span lang="EN-US">464XLAT 17 Kbytes</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal">MAP-E    35 Kbytes<o:p></o:p></p>
        <p class="MsoNormal">LW4o6   35 Kbytes<o:p></o:p></p>
        <p class="MsoNormal">MAP-T   48 Kbytes<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><span lang="EN-US">If *all* them are
            implemented: 53 Kbytes (there are many “shared” modules
            among them, same data plane, etc.).<o:p></o:p></span></p>
        <p class="MsoNormal" style="margin-left:35.4pt"><span
            lang="EN-US"><br>
            There are other drivers here, and while I have no concerns
            about 464xlat, I also am not ready to crown it the winner. <o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">I bet a dinner …
            Cellular is too powerful and they made the decision long
            time ago.</span></p>
      </div>
    </blockquote>
    <br>
    What's the decision criterion? :)<br>
    Mobile is huge, but has little influence on wireline. And most of
    them (globally) are still on dual stack.<br>
    <br>
    Lee<br>
    <blockquote type="cite"
      cite="mid:D8C2AF9B-45FD-48CE-AFDE-D6EF651936A4@consulintel.es">
      <div class="WordSection1">
        <p class="MsoNormal"><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal" style="margin-left:35.4pt"><span
            lang="EN-US"><br>
            <br>
          </span>Lee<br>
           <br>
          <br>
          <o:p></o:p></p>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <div>
            <p class="MsoNormal" style="margin-left:35.4pt"><span
                style="font-size:10.5pt;color:black" lang="EN-US"><br>
                Regarsd,</span><o:p></o:p></p>
            <p class="MsoNormal"
style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt"><span
style="font-size:10.5pt;color:black;mso-fareast-language:EN-US"
                lang="EN-US">Jordi</span><o:p></o:p></p>
            <p class="MsoNormal"
style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt"><span
style="font-size:10.5pt;color:black;mso-fareast-language:EN-US"
                lang="EN-US"> </span><o:p></o:p></p>
          </div>
          <p class="MsoNormal" style="margin-left:35.4pt"><span
              style="mso-fareast-language:EN-US" lang="EN-US"> </span><o:p></o:p></p>
          <p class="MsoNormal" style="margin-left:35.4pt"><span
              style="mso-fareast-language:EN-US" lang="EN-US"> </span><o:p></o:p></p>
          <div style="border:none;border-top:solid #B5C4DF
            1.0pt;padding:3.0pt 0cm 0cm 0cm">
            <p class="MsoNormal" style="margin-left:70.8pt"><b><span
                  style="font-size:12.0pt;color:black">De: </span></b><span
                style="font-size:12.0pt;color:black">v6ops <a
                  href="mailto:v6ops-bounces@ietf.org"
                  moz-do-not-send="true">&lt;v6ops-bounces@ietf.org&gt;</a>
                en nombre de Lee Howard <a href="mailto:lee@asgard.org"
                  moz-do-not-send="true">&lt;lee@asgard.org&gt;</a><br>
                <b>Fecha: </b>jueves, 14 de junio de 2018, 15:16<br>
                <b>Para: </b><a href="mailto:v6ops@ietf.org"
                  moz-do-not-send="true">&lt;v6ops@ietf.org&gt;</a><br>
                <b>Asunto: </b>Re: [v6ops] Disadvantages of MAP
                protocols -- Re: Is 464XLAT really inferior to all other
                IPv6 transition technologies? -- Re: updating RFC8026 to
                support 464XLAT in draft-ietf-v6ops-transition-ipv4aas</span><o:p></o:p></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:70.8pt"> <o:p></o:p></p>
          </div>
          <p style="margin-left:70.8pt"> <o:p></o:p></p>
          <p class="MsoNormal" style="margin-left:70.8pt"> <o:p></o:p></p>
          <div>
            <p class="MsoNormal" style="margin-left:70.8pt">On
              06/14/2018 08:12 AM, Ca By wrote:<o:p></o:p></p>
          </div>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <p class="MsoNormal" style="margin-left:70.8pt"> <o:p></o:p></p>
            </div>
            <div>
              <p class="MsoNormal" style="margin-left:70.8pt"> <o:p></o:p></p>
              <div>
                <div>
                  <p class="MsoNormal" style="margin-left:70.8pt">On
                    Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti
                    &lt;lorenzo=<a
                      href="mailto:40google.com@dmarc.ietf.org"
                      moz-do-not-send="true">40google.com@dmarc.ietf.org</a>&gt;
                    wrote:<o:p></o:p></p>
                </div>
                <blockquote style="border:none;border-left:solid #CCCCCC
                  1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                  <div>
                    <div>
                      <div>
                        <p class="MsoNormal" style="margin-left:70.8pt">On
                          Thu, Jun 14, 2018 at 7:28 PM &lt;<a
                            href="mailto:nick.heatley@bt.com"
                            target="_blank" moz-do-not-send="true">nick.heatley@bt.com</a>&gt;
                          wrote:<o:p></o:p></p>
                      </div>
                      <blockquote style="border:none;border-left:solid
                        #CCCCCC 1.0pt;padding:0cm 0cm 0cm
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
                        <div>
                          <div>
                            <p class="MsoNormal"
                              style="margin-left:70.8pt"><span
                                lang="EN-GB"> </span><o:p></o:p></p>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class="MsoNormal" style="margin-left:70.8pt"> <o:p></o:p></p>
                      </div>
                    </div>
                  </div>
                  <div>
                    <div>
                      <div>
                        <p class="MsoNormal" style="margin-left:70.8pt">Oh,
                          I definitely agree that 464xlat has it's
                          place. I maintain a popular implementation of
                          it :-)<o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="margin-left:70.8pt"> <o:p></o:p></p>
                      </div>
                      <div>
                        <p class="MsoNormal" style="margin-left:70.8pt">I'm
                          just saying it's not the best solution for a
                          wireline network. <o:p></o:p></p>
                      </div>
                    </div>
                  </div>
                </blockquote>
                <div>
                  <p class="MsoNormal" style="margin-left:70.8pt"> <o:p></o:p></p>
                </div>
                <div>
                  <p class="MsoNormal" style="margin-left:70.8pt">Perhaps. <o:p></o:p></p>
                </div>
                <div>
                  <p class="MsoNormal" style="margin-left:70.8pt"> <o:p></o:p></p>
                </div>
                <div>
                  <p class="MsoNormal" style="margin-left:70.8pt">The
                    market for ipv6-only transition, afaik, is won by
                    ds-lite and 464xlat. <o:p></o:p></p>
                </div>
                <div>
                  <p class="MsoNormal" style="margin-left:70.8pt"> <o:p></o:p></p>
                </div>
                <div>
                  <p class="MsoNormal" style="margin-left:70.8pt">Afaik,
                    there is not a large production stateless MAP
                    implementation, and this market is fairly mature.
                    That said, at this point, the theoretical advantage
                    of stateless has failed to materialize in real world
                    deployment ... while the stateful solutions keep
                    gaining share. <o:p></o:p></p>
                </div>
                <div>
                  <p class="MsoNormal" style="margin-left:70.8pt"> <o:p></o:p></p>
                </div>
              </div>
            </div>
          </blockquote>
          <p class="MsoNormal" style="margin-left:70.8pt"><br>
            <br>
            Crowd-sourced list of transition technologies various
            carriers have deployed: <a
href="https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=0"
              moz-do-not-send="true">https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=0</a><br>
            <br>
            I see several that have deployed MAP. <br>
            <br>
            I speculate that DS-Lite and NAT64 had early mover advantage
            (i.e., early development), and were the only game in town.
            464xlat only has that advantage in mobile, since handsets
            are the only major CLAT implementation. <br>
            <br>
            I think it's too soon to declare winners.<br>
            <br>
            Lee<br>
            <br>
            <br>
            <br>
            _______________________________________________ v6ops
            mailing list <a href="mailto:v6ops@ietf.org"
              moz-do-not-send="true">v6ops@ietf.org</a> <a
              href="https://www.ietf.org/mailman/listinfo/v6ops"
              moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/v6ops</a>
            <o:p></o:p></p>
          <p class="MsoNormal"
style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt"><br>
            **********************************************<br>
            IPv4 is over<br>
            Are you ready for the new Internet ?<br>
            <a href="http://www.consulintel.es" moz-do-not-send="true">http://www.consulintel.es</a><br>
            The IPv6 Company<br>
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            This electronic message contains information which may be
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        </blockquote>
        <p class="MsoNormal" style="margin-left:35.4pt"><br>
          <br>
          <o:p></o:p></p>
      </div>
      <br>
      **********************************************<br>
      IPv4 is over<br>
      Are you ready for the new Internet ?<br>
      <a class="moz-txt-link-freetext" href="http://www.consulintel.es">http://www.consulintel.es</a><br>
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      This electronic message contains information which may be
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To: Alexandre Petrescu <alexandru.petrescu@gmail.com>
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Subject: Re: [v6ops] When IPv6 breaks IPv4
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For the record, I don't think the subject of registering for IETF =
meetings, hotel choice, using PayPal, and using Github is covered in the =
IPv6 charter. Yes, I'd like PayPal, Github, and a variety of other web =
sites to implement IPv6. I'm pretty sure their maintainers are not =
reading this list.

> On Jun 13, 2018, at 5:47 AM, Alexandre Petrescu =
<alexandru.petrescu@gmail.com> wrote:
>=20
> When going to IETF meetings, one is concerned about which hotel to =
book.  Typically the concerns are the price range, distance from IETF =
venue, transportation, comfort conditions, WiFi, breakfast, rating by =
others, etc.
>=20
> One other interesting criterion is whether the reservation with the =
link provided by IETF can be made on IPv6, or not.
>=20
> For IETF 102
> Fairmont the Queen Elizabeth: IPv6 reservation ok
> Le Centre Sheraton: IPv6 reservation not possible
> others...
>=20
> Alex
>=20
> Le 13/06/2018 =C3=A0 11:20, Alexandre Petrescu a =C3=A9crit :
>> Le 27/04/2018 =C3=A0 05:12, Jen Linkova a =C3=A9crit :
>>> On Thu, Apr 26, 2018 at 6:42 PM, Alexandre Petrescu
>>> <alexandre.petrescu@gmail.com> wrote:
>>>> Even us, at IETF, whenever we write a new hot Internet Draft we put =
it
>>>> on an IPv4 website first.
>>> Actually we we don't.
>>>=20
>>>> (I guess datatracker is not reachable on IPv6,
>>>> just guess.)
>>>=20
>>> I've just completely disabled IPv4 on my workstation and
>>> https://datatracker.ietf.org works just fine (I tested browsing the
>>> drafts and some links on WG Chair dashboard).
>> I have just used an IPv6 linux laptop on an IPv6 cellular link that =
gives no IPv4.
>> The laptop connects ok to https://ietf.org, tools.ietf.org.  I have =
even tried to register for the next meeting.  I went with the process up =
to filling the data, but stopped there.
>> There are however some websites that dont work, like github.com.  =
Many people use github for IETF work like drafts, charters, etc.
>> Alex
>> _______________________________________________
>> v6ops mailing list
>> v6ops@ietf.org
>> https://www.ietf.org/mailman/listinfo/v6ops
>=20
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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From nobody Thu Jun 14 13:15:35 2018
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Subject: Re: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Hello Jordi,

I am happy with this outcome. :-)

I have an idea: perhaps you could add a section about the pros and cons 
of each transition technology covered by the draft. (It could be helpful 
for the network operators when selecting the technology matching their 
need the best. However, I am not sure whether it is in the scope of this 
draft.)

What do you think of it?

Best regards,

Gábor

6/14/2018 6:21 PM keltezéssel, JORDI PALET MARTINEZ írta:
> Hi all,
>
>
>
> After a long chat with the authors of RFC8026, we have found an alternative solution which avoids updating RFC8026 and also avoids requiring a new option code for 464XLAT, as there is already one that we can use, which is related to NAT64, so still can use RFC8026 for our original intend of prioritizing and managing the available mechanism from the operator network.
>
>
>
> Consequently, we are working in a new version of draft-ietf-v6ops-transition-ipv4aas, which will be posted ASAP in v6ops.
>
>
>
> Anyway, we had lot of fun in v6ops because this, and I think every comment has been very useful!
>
>
>
> Thanks!
>
>
>
> Regards,
>
> Jordi
>
>   
>
>   
>
>
>
>
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>
> This electronic message contains information which may be privileged or confidential. The information is intended to be for the exclusive use of the individual(s) named above and further non-explicilty authorized disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited and will be considered a criminal offense. If you are not the intended recipient be aware that any disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited, will be considered a criminal offense, so you must reply to the original sender to inform about this communication and delete it.
>
>
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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Subject: Re: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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On Jun 14, 2018, at 1:15 PM, Lencse G=C3=A1bor <lencse@hit.bme.hu> =
wrote:
> I have an idea: perhaps you could add a section about the pros and =
cons of each transition technology covered by the draft. (It could be =
helpful for the network operators when selecting the technology matching =
their need the best. However, I am not sure whether it is in the scope =
of this draft.)

It would be incredibly useful. That said, it often involves value =
judgements, which are essentially in the eye of the beholder.

We have had a recent thread regarding 464xlat and MAP-T. If I can say =
this without actually putting words into Lorenzo's mouth, his issues =
with translation in general are probably summarized in RFC 2993, and I =
would agree with him. The distinction between 464xlat and MAP-T you'll =
have to find in his emails; they are both services an ISP might deploy, =
and while they use the same tool (translation) they are not the same =
service. It seems to be generally agreed that MAP-T is more expensive to =
deploy than 464xlat; the question is what the extra expense buys, and =
whether someone agrees that the result is worth the cost.

So in your proposed section, I would have to ask Jordi to not only say =
"MAP-T costs more to deploy than 464xlat", but gives the argument that =
might lead someone to choose MAP-T.

And then we get to the large variety of other technologies, some of =
which presume an IPv4 core network and some an IPv6 core network (and =
none of which assume an MPLS core network carrying both kinds of =
traffic).

If you would like to write such a document, please be my guest, by all =
means. But I'm not going to expect Jordi to do all that in the coming =
two weeks...

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From nobody Thu Jun 14 14:38:17 2018
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Date: Thu, 14 Jun 2018 23:38:04 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lencse =?UTF-8?B?R8OhYm9y?= <lencse@hit.bme.hu>, <v6ops@ietf.org>
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Thread-Topic: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Not in scope, and I think that will make this draft an endless discussion.



Sometimes is not black and white, so I don't think the IETF can suggest one=
 or other mechanism. Pros and cons maybe, but at the end many pros and cons=
 need to be "balanced" in each network.



I've a presentation that do that and I even try to score each possible aspe=
ct of the transitions mechanisms, their impact in the network, etc., in an =
excel spreadsheet, but I always explicitly say "you really need to check th=
is against your own case" ...



That said, I'm happy, once we are done with this draft, to start that work =
if the WG believe is useful.



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lencse G=C3=A1bor <lencse@h=
it.bme.hu>

Fecha: jueves, 14 de junio de 2018, 22:16

Para: <v6ops@ietf.org>

Asunto: Re: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transitio=
n-ipv4aas



    Hello Jordi,

   =20

    I am happy with this outcome. :-)

   =20

    I have an idea: perhaps you could add a section about the pros and cons=
=20

    of each transition technology covered by the draft. (It could be helpfu=
l=20

    for the network operators when selecting the technology matching their=
=20

    need the best. However, I am not sure whether it is in the scope of thi=
s=20

    draft.)

   =20

    What do you think of it?

   =20

    Best regards,

   =20

    G=C3=A1bor

   =20

    6/14/2018 6:21 PM keltez=C3=A9ssel, JORDI PALET MARTINEZ =C3=ADrta:

    > Hi all,

    >

    >

    >

    > After a long chat with the authors of RFC8026, we have found an alter=
native solution which avoids updating RFC8026 and also avoids requiring a n=
ew option code for 464XLAT, as there is already one that we can use, which =
is related to NAT64, so still can use RFC8026 for our original intend of pr=
ioritizing and managing the available mechanism from the operator network.

    >

    >

    >

    > Consequently, we are working in a new version of draft-ietf-v6ops-tra=
nsition-ipv4aas, which will be posted ASAP in v6ops.

    >

    >

    >

    > Anyway, we had lot of fun in v6ops because this, and I think every co=
mment has been very useful!

    >

    >

    >

    > Thanks!

    >

    >

    >

    > Regards,

    >

    > Jordi

    >

    >  =20

    >

    >  =20

    >

    >

    >

    >

    > **********************************************

    > IPv4 is over

    > Are you ready for the new Internet ?

    > http://www.consulintel.es

    > The IPv6 Company

    >

    > This electronic message contains information which may be privileged =
or confidential. The information is intended to be for the exclusive use of=
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original sender to inform about this communication and delete it.

    >

    >

    >

    > _______________________________________________

    > v6ops mailing list

    > v6ops@ietf.org

    > https://www.ietf.org/mailman/listinfo/v6ops

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

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	If you would like to write such a document, please be my guest, by all means. But I'm not going to expect Jordi to do all that in the coming two weeks...



Fred,



I'm easy to challenge ! But to be honest, prefer to concentrate the next two weeks in having people contributing to the actual document, and the NAT64 one.



In addition to that, I really thing mixing Gabor suggestion in this document will not be so useful at this stage and will break our original idea of making it as something to follow for CE vendors as RFC7084 (not operators).



But really, I'm happy to take that afterwards.



    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

    




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Date: Fri, 15 Jun 2018 00:16:55 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Fred Baker <fredbaker.ietf@gmail.com>, Lencse =?UTF-8?B?R8OhYm9y?= <lencse@hit.bme.hu>
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Thread-Topic: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
References: <940CC666-9208-4784-B452-58D5482B7782@consulintel.es> <d8960bbf-ba84-e7e1-6d2b-63f973a7f33c@hit.bme.hu> <C40B15B6-4AB9-433F-94AD-A2624F359DC4@gmail.com> <A4AAB1E1-DFCA-4AD8-85CC-5004AA2FBA84@consulintel.es>
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Subject: Re: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Here is a link to that table (I just twitted it):



https://twitter.com/jordipalet/status/1007383535471222784



Is easy to understand how it works. Depending on each "feature impact or re=
levance" in your network you use red, orange or green (as a traffic light),=
 and each color has a value (red 0, orange 0.5, green 1).



Of course, it is only an idea, and really depends on each network and how y=
ou value each "feature" (so the scoring could be adapted based on each netw=
ork case).



ASAP I've a minute, I will try to add (if not already there) all the inputs=
 that we have got in the list this week, but not just for MAP/464XLAT, for =
every mechanism.



To make it correctly in a draft, we will need to agree what it means each l=
ine. For example, "scalability" in what sense ? Is not so easy ... just rec=
all when I wrote the draft about what it means "IPv6-only" ...



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de JORDI PALET MARTINEZ <jordi=
.palet=3D40consulintel.es@dmarc.ietf.org>

Fecha: jueves, 14 de junio de 2018, 23:50

Para: Fred Baker <fredbaker.ietf@gmail.com>, Lencse G=C3=A1bor <lencse@hit.=
bme.hu>

CC: <v6ops@ietf.org>

Asunto: Re: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transitio=
n-ipv4aas



    	If you would like to write such a document, please be my guest, by all=
 means. But I'm not going to expect Jordi to do all that in the coming two =
weeks...

   =20

   =20

   =20

    Fred,

   =20

   =20

   =20

    I'm easy to challenge ! But to be honest, prefer to concentrate the nex=
t two weeks in having people contributing to the actual document, and the N=
AT64 one.

   =20

   =20

   =20

    In addition to that, I really thing mixing Gabor suggestion in this doc=
ument will not be so useful at this stage and will break our original idea =
of making it as something to follow for CE vendors as RFC7084 (not operator=
s).

   =20

   =20

   =20

    But really, I'm happy to take that afterwards.

   =20

   =20

   =20

        _______________________________________________

   =20

        v6ops mailing list

   =20

        v6ops@ietf.org

   =20

        https://www.ietf.org/mailman/listinfo/v6ops

   =20

       =20

   =20

   =20

   =20

   =20

    **********************************************

    IPv4 is over

    Are you ready for the new Internet ?

    http://www.consulintel.es

    The IPv6 Company

   =20

    This electronic message contains information which may be privileged or=
 confidential. The information is intended to be for the exclusive use of t=
he individual(s) named above and further non-explicilty authorized disclosu=
re, copying, distribution or use of the contents of this information, even =
if partially, including attached files, is strictly prohibited and will be =
considered a criminal offense. If you are not the intended recipient be awa=
re that any disclosure, copying, distribution or use of the contents of thi=
s information, even if partially, including attached files, is strictly pro=
hibited, will be considered a criminal offense, so you must reply to the or=
iginal sender to inform about this communication and delete it.

   =20

   =20

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




**********************************************
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Are you ready for the new Internet ?
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This electronic message contains information which may be privileged or con=
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al sender to inform about this communication and delete it.




From nobody Thu Jun 14 18:38:35 2018
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/_zdhPxyAoYsKkpCdedmRdUb0x-A>
Subject: Re: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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I agree with Jordi. Not in scope.=20

This would make a fine white paper to publish somewhere, but IMHO, it=E2=80=99=
s certainly out of scope for this document, likely to be a fruitless flame w=
ar in this particular group.=20

To be a useful white paper, I believe it should cover as many of the potenti=
ally useful (by the broadest definition of at least a few cases where the so=
lution is in use exist) options and cover the facts, advantages, and trade o=
ffs of each one. It should not recommend any solution, but should provide a c=
oncise comparison allowing the reader to make an informed decision about wha=
t best fits their particular use case.=20

While I think some members of this group could do an excellent job authoring=
 such a paper, I do not believe it would likely survive the holy war that wo=
uld ensue if it were a group project.=20

Owen


Owen


> On Jun 15, 2018, at 04:38, JORDI PALET MARTINEZ <jordi.palet=3D40consulint=
el.es@dmarc.ietf.org> wrote:
>=20
> Not in scope, and I think that will make this draft an endless discussion.=

>=20
>=20
>=20
> Sometimes is not black and white, so I don't think the IETF can suggest on=
e or other mechanism. Pros and cons maybe, but at the end many pros and cons=
 need to be "balanced" in each network.
>=20
>=20
>=20
> I've a presentation that do that and I even try to score each possible asp=
ect of the transitions mechanisms, their impact in the network, etc., in an e=
xcel spreadsheet, but I always explicitly say "you really need to check this=
 against your own case" ...
>=20
>=20
>=20
> That said, I'm happy, once we are done with this draft, to start that work=
 if the WG believe is useful.
>=20
>=20
>=20
> Regards,
>=20
> Jordi
>=20
>=20
>=20
>=20
>=20
>=20
>=20
> =EF=BB=BF-----Mensaje original-----
>=20
> De: v6ops <v6ops-bounces@ietf.org> en nombre de Lencse G=C3=A1bor <lencse@=
hit.bme.hu>
>=20
> Fecha: jueves, 14 de junio de 2018, 22:16
>=20
> Para: <v6ops@ietf.org>
>=20
> Asunto: Re: [v6ops] no need to update RFC8026 in draft-ietf-v6ops-transiti=
on-ipv4aas
>=20
>=20
>=20
>    Hello Jordi,
>=20
>=20
>=20
>    I am happy with this outcome. :-)
>=20
>=20
>=20
>    I have an idea: perhaps you could add a section about the pros and cons=
=20
>=20
>    of each transition technology covered by the draft. (It could be helpfu=
l=20
>=20
>    for the network operators when selecting the technology matching their=20=

>=20
>    need the best. However, I am not sure whether it is in the scope of thi=
s=20
>=20
>    draft.)
>=20
>=20
>=20
>    What do you think of it?
>=20
>=20
>=20
>    Best regards,
>=20
>=20
>=20
>    G=C3=A1bor
>=20
>=20
>=20
>    6/14/2018 6:21 PM keltez=C3=A9ssel, JORDI PALET MARTINEZ =C3=ADrta:
>=20
>> Hi all,
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>> After a long chat with the authors of RFC8026, we have found an alternati=
ve solution which avoids updating RFC8026 and also avoids requiring a new op=
tion code for 464XLAT, as there is already one that we can use, which is rel=
ated to NAT64, so still can use RFC8026 for our original intend of prioritiz=
ing and managing the available mechanism from the operator network.
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>> Consequently, we are working in a new version of draft-ietf-v6ops-transit=
ion-ipv4aas, which will be posted ASAP in v6ops.
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>> Anyway, we had lot of fun in v6ops because this, and I think every commen=
t has been very useful!
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>> Thanks!
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>> Regards,
>=20
>>=20
>=20
>> Jordi
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>> **********************************************
>=20
>> IPv4 is over
>=20
>> Are you ready for the new Internet ?
>=20
>> http://www.consulintel.es
>=20
>> The IPv6 Company
>=20
>>=20
>=20
>> This electronic message contains information which may be privileged or c=
onfidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, c=
opying, distribution or use of the contents of this information, even if par=
tially, including attached files, is strictly prohibited and will be conside=
red a criminal offense. If you are not the intended recipient be aware that a=
ny disclosure, copying, distribution or use of the contents of this informat=
ion, even if partially, including attached files, is strictly prohibited, wi=
ll be considered a criminal offense, so you must reply to the original sende=
r to inform about this communication and delete it.
>=20
>>=20
>=20
>>=20
>=20
>>=20
>=20
>> _______________________________________________
>=20
>> v6ops mailing list
>=20
>> v6ops@ietf.org
>=20
>> https://www.ietf.org/mailman/listinfo/v6ops
>=20
>=20
>=20
>    _______________________________________________
>=20
>    v6ops mailing list
>=20
>    v6ops@ietf.org
>=20
>    https://www.ietf.org/mailman/listinfo/v6ops
>=20
>=20
>=20
>=20
>=20
>=20
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>=20
> This electronic message contains information which may be privileged or co=
nfidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, c=
opying, distribution or use of the contents of this information, even if par=
tially, including attached files, is strictly prohibited and will be conside=
red a criminal offense. If you are not the intended recipient be aware that a=
ny disclosure, copying, distribution or use of the contents of this informat=
ion, even if partially, including attached files, is strictly prohibited, wi=
ll be considered a criminal offense, so you must reply to the original sende=
r to inform about this communication and delete it.
>=20
>=20
>=20
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


From nobody Fri Jun 15 02:11:03 2018
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Le 14/06/2018 à 19:52, Fred Baker a écrit :
[...]

> For the record, I don't think the subject of registering for IETF
> meetings, hotel choice, using PayPal, and using Github is covered in
> the IPv6 charter.

I agree with you.

But if we wanted to work on that Charter by only using IPv6 technology 
then we would have great success, only with a few quirks: paypal, hotel 
choice and github.

That is a question of _using_ IPv6 technology.

There are many ways to try the use of IPv6 technology.

One great way is to try the use of the IPv6 technology while we are at 
an IETF meeting.  They offer some ESSID that does only IPv6.  I did that 
and it is a great testing.

However, while doing that test on ESSID that is IPv6 only I felt that 
other tests were needed from elsewhere than IETF.  Because we were 
already at IETF, but there is a need to come to IETF first.

So now, before coming at IETF, is a great time to test IPv6.  To answer 
the question: how IPv6 can help to come to IETF?  Or how IPv6 is a break 
in coming to IETF?

> Yes, I'd like PayPal, Github, and a variety of
> other web sites to implement IPv6. I'm pretty sure their maintainers
> are not reading this list.

Well, I can pick one.  The github.  What is the postmaster address at 
github?  I can write her an email.

(I want to complain to her not only about IPv6, but also about their 
storage format: they break UTF-8, and as such people's names get wrong 
in drafts; examples available upon request).

Alex

> 
>> On Jun 13, 2018, at 5:47 AM, Alexandre Petrescu
>> <alexandru.petrescu@gmail.com> wrote:
>> 
>> When going to IETF meetings, one is concerned about which hotel to
>> book.  Typically the concerns are the price range, distance from
>> IETF venue, transportation, comfort conditions, WiFi, breakfast,
>> rating by others, etc.
>> 
>> One other interesting criterion is whether the reservation with the
>> link provided by IETF can be made on IPv6, or not.
>> 
>> For IETF 102 Fairmont the Queen Elizabeth: IPv6 reservation ok Le
>> Centre Sheraton: IPv6 reservation not possible others...
>> 
>> Alex
>> 
>> Le 13/06/2018 à 11:20, Alexandre Petrescu a écrit :
>>> Le 27/04/2018 à 05:12, Jen Linkova a écrit :
>>>> On Thu, Apr 26, 2018 at 6:42 PM, Alexandre Petrescu 
>>>> <alexandre.petrescu@gmail.com> wrote:
>>>>> Even us, at IETF, whenever we write a new hot Internet Draft
>>>>> we put it on an IPv4 website first.
>>>> Actually we we don't.
>>>> 
>>>>> (I guess datatracker is not reachable on IPv6, just guess.)
>>>> 
>>>> I've just completely disabled IPv4 on my workstation and 
>>>> https://datatracker.ietf.org works just fine (I tested browsing
>>>> the drafts and some links on WG Chair dashboard).
>>> I have just used an IPv6 linux laptop on an IPv6 cellular link
>>> that gives no IPv4. The laptop connects ok to https://ietf.org,
>>> tools.ietf.org.  I have even tried to register for the next
>>> meeting.  I went with the process up to filling the data, but
>>> stopped there. There are however some websites that dont work,
>>> like github.com.  Many people use github for IETF work like
>>> drafts, charters, etc. Alex 
>>> _______________________________________________ v6ops mailing
>>> list v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>> 
>> _______________________________________________ v6ops mailing list 
>> v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops
> 


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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Le 15/06/2018 à 11:10, Alexandru Petrescu a écrit :
> 
> 
> Le 14/06/2018 à 19:52, Fred Baker a écrit :
> [...]
> 
>> For the record, I don't think the subject of registering for IETF
>> meetings, hotel choice, using PayPal, and using Github is covered in
>> the IPv6 charter.
> 
> I agree with you.
> 
> But if we wanted to work on that Charter by only using IPv6 technology 
> then we would have great success, only with a few quirks: paypal, hotel 
> choice and github.
> 
> That is a question of _using_ IPv6 technology.
> 
> There are many ways to try the use of IPv6 technology.
> 
> One great way is to try the use of the IPv6 technology while we are at 
> an IETF meeting.  They offer some ESSID that does only IPv6.  I did that 
> and it is a great testing.

I mean I did some testing.  The ESSID with IPv6 only was designed and 
deployed by IETF network designers.

Alex

> 
> However, while doing that test on ESSID that is IPv6 only I felt that 
> other tests were needed from elsewhere than IETF.  Because we were 
> already at IETF, but there is a need to come to IETF first.
> 
> So now, before coming at IETF, is a great time to test IPv6.  To answer 
> the question: how IPv6 can help to come to IETF?  Or how IPv6 is a break 
> in coming to IETF?
> 
>> Yes, I'd like PayPal, Github, and a variety of
>> other web sites to implement IPv6. I'm pretty sure their maintainers
>> are not reading this list.
> 
> Well, I can pick one.  The github.  What is the postmaster address at 
> github?  I can write her an email.
> 
> (I want to complain to her not only about IPv6, but also about their 
> storage format: they break UTF-8, and as such people's names get wrong 
> in drafts; examples available upon request).
> 
> Alex
> 
>>
>>> On Jun 13, 2018, at 5:47 AM, Alexandre Petrescu
>>> <alexandru.petrescu@gmail.com> wrote:
>>>
>>> When going to IETF meetings, one is concerned about which hotel to
>>> book.  Typically the concerns are the price range, distance from
>>> IETF venue, transportation, comfort conditions, WiFi, breakfast,
>>> rating by others, etc.
>>>
>>> One other interesting criterion is whether the reservation with the
>>> link provided by IETF can be made on IPv6, or not.
>>>
>>> For IETF 102 Fairmont the Queen Elizabeth: IPv6 reservation ok Le
>>> Centre Sheraton: IPv6 reservation not possible others...
>>>
>>> Alex
>>>
>>> Le 13/06/2018 à 11:20, Alexandre Petrescu a écrit :
>>>> Le 27/04/2018 à 05:12, Jen Linkova a écrit :
>>>>> On Thu, Apr 26, 2018 at 6:42 PM, Alexandre Petrescu 
>>>>> <alexandre.petrescu@gmail.com> wrote:
>>>>>> Even us, at IETF, whenever we write a new hot Internet Draft
>>>>>> we put it on an IPv4 website first.
>>>>> Actually we we don't.
>>>>>
>>>>>> (I guess datatracker is not reachable on IPv6, just guess.)
>>>>>
>>>>> I've just completely disabled IPv4 on my workstation and 
>>>>> https://datatracker.ietf.org works just fine (I tested browsing
>>>>> the drafts and some links on WG Chair dashboard).
>>>> I have just used an IPv6 linux laptop on an IPv6 cellular link
>>>> that gives no IPv4. The laptop connects ok to https://ietf.org,
>>>> tools.ietf.org.  I have even tried to register for the next
>>>> meeting.  I went with the process up to filling the data, but
>>>> stopped there. There are however some websites that dont work,
>>>> like github.com.  Many people use github for IETF work like
>>>> drafts, charters, etc. Alex 
>>>> _______________________________________________ v6ops mailing
>>>> list v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>>>
>>> _______________________________________________ v6ops mailing list 
>>> v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>>
> 
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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Subject: [v6ops] Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Dear Fred,

Thank you very much for your invitation. I am willing to accept it, but 
I would like to clarify your expectations before saying 'yes'.

I have several questions.

1. Depth of the analysis

- Basic level: well-known advantages and disadvantages, similarly as 
people wrote about MAP-T/E and 464XLAT, but also about DS-Lite and lw4o6.
- Advanced level: basic level + security analysis using the methodology 
defined in [1] + performance analysis according to RFC 8219.

What depth do you recommend?

2. Method for getting the results and their publication

As for the information for the basic level, I would prepare a google 
docs table, fill in the information I have and send the link to the 
v6ops list asking contributions.
After commenting and discussing, I would compile it to an I-D.

Do you think that v6ops WG would finally agree to publish it as an RFC?

As for the information for the advanced level, I would work together 
with my students and PhD students, and publish our results first in 
academic papers and then include their most important lessons into the I-D.

What do you think of it?

3. Timeline

I think that I could put together the first table in a few weeks. The 
contribution of the v6ops list members and the discussion could be done 
in a few months and then I could compile the results into an I-D in a 
few weeks. Perhaps, it could be presented at IETF 103.

The further parts would require much more time and results could be 
included gradually in 1-2 years.

4. Scope

The smallest natural scope includes the technologies for IPv4AAS, that 
is: 464XLAT, DS-Lite, MAP-T/E and lw4o6.

IPv6 transition technologies for other carefully selected scenarios 
might also be included. E.g. I have significant amount of results in 
benchmarking DNS64 servers, having a testing tool [2], a well defined 
methodology [3] and ready to use results concerning the DNS64 
performance of BIND, PowerDNS and Unbound [4].
One of my PhD students is currently benchmarking some sateless NAT64 
implementations according the the dual DUT setup of RFC 8219 using an 
RFC 2544 compatible Tester. Another PhD student is currently working on 
a RFC 8219 compliant NAT64 tester program (using DPDK) to be able to 
perform single DUT setup NAT64 benchmarking tests.

Thus, the scope can be widened, if you would like to.

What do you think about my recommendations?

Best regards,

Gábor

References:

[1] G. Lencse and Y. Kadobayashi, "Methodology for the identification of 
potential security issues of different IPv6 transition technologies: 
Threat analysis of DNS64 and stateful NAT64", /Computers & Security/ 
(Elsevier), vol. 77, no. 1, pp. 397-411, August 1, 2018, DOI: 
10.1016/j.cose.2018.04.012

[2] G. Lencse, D. Bakai, "Design and implementation of a test program 
for benchmarking DNS64 servers", /IEICE Transactions on Communications/, 
vol. E100-B, no. 6. pp. 948-954, June 2017. DOI: 
10.1587/transcom.2016EBN0007

[3] G. Lencse, M. Georgescu, and Y. Kadobayashi, "Benchmarking 
Methodology for DNS64 Servers", /Computer Communications/ (Elsevier), 
vol. 109, no. 1, pp. 162-175, September 1, 2017, DOI: 
10.1016/j.comcom.2017.06.004

[4] G. Lencse and Y. Kadobayashi, "Benchmarking DNS64 Implementations: 
Theory and Practice", /Computer Communications/ (Elsevier), vol. 127, 
no. 1, pp. 61-74, September 1, 2018, DOI: 10.1016/j.comcom.2018.05.005


6/14/2018 10:42 PM keltezéssel, Fred Baker írta:
>
> On Jun 14, 2018, at 1:15 PM, Lencse Gábor <lencse@hit.bme.hu> wrote:
>> I have an idea: perhaps you could add a section about the pros and cons of each transition technology covered by the draft. (It could be helpful for the network operators when selecting the technology matching their need the best. However, I am not sure whether it is in the scope of this draft.)
> It would be incredibly useful. That said, it often involves value judgements, which are essentially in the eye of the beholder.
>
> We have had a recent thread regarding 464xlat and MAP-T. If I can say this without actually putting words into Lorenzo's mouth, his issues with translation in general are probably summarized in RFC 2993, and I would agree with him. The distinction between 464xlat and MAP-T you'll have to find in his emails; they are both services an ISP might deploy, and while they use the same tool (translation) they are not the same service. It seems to be generally agreed that MAP-T is more expensive to deploy than 464xlat; the question is what the extra expense buys, and whether someone agrees that the result is worth the cost.
>
> So in your proposed section, I would have to ask Jordi to not only say "MAP-T costs more to deploy than 464xlat", but gives the argument that might lead someone to choose MAP-T.
>
> And then we get to the large variety of other technologies, some of which presume an IPv4 core network and some an IPv6 core network (and none of which assume an MPLS core network carrying both kinds of traffic).
>
> If you would like to write such a document, please be my guest, by all means. But I'm not going to expect Jordi to do all that in the coming two weeks...


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<html>
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    Dear Fred,<br>
    <br>
    Thank you very much for your invitation. I am willing to accept it,
    but I would like to clarify your expectations before saying 'yes'.<br>
    <br>
    I have several questions.<br>
    <br>
    1. Depth of the analysis<br>
    <br>
    - Basic level: well-known advantages and disadvantages, similarly as
    people wrote about MAP-T/E and 464XLAT, but also about DS-Lite and
    lw4o6.<br>
    - Advanced level: basic level + security analysis using the
    methodology defined in [1] + performance analysis according to RFC
    8219.<br>
    <br>
    What depth do you recommend?<br>
    <br>
    2. Method for getting the results and their publication<br>
    <br>
    As for the information for the basic level, I would prepare a google
    docs table, fill in the information I have and send the link to the
    v6ops list asking contributions.<br>
    After commenting and discussing, I would compile it to an I-D. <br>
    <br>
    Do you think that v6ops WG would finally agree to publish it as an
    RFC?<br>
    <br>
    As for the information for the advanced level, I would work together
    with my students and PhD students, and publish our results first in
    academic papers and then include their most important lessons into
    the I-D.<br>
    <br>
    What do you think of it?<br>
    <br>
    3. Timeline<br>
    <br>
    I think that I could put together the first table in a few weeks.
    The contribution of the v6ops list members and the discussion could
    be done in a few months and then I could compile the results into an
    I-D in a few weeks. Perhaps, it could be presented at IETF 103.<br>
    <br>
    The further parts would require much more time and results could be
    included gradually in 1-2 years.<br>
    <br>
    4. Scope<br>
    <br>
    The smallest natural scope includes the technologies for IPv4AAS,
    that is: 464XLAT, DS-Lite, MAP-T/E and lw4o6.<br>
    <br>
    IPv6 transition technologies for other carefully selected scenarios
    might also be included. E.g. I have significant amount of results in
    benchmarking DNS64 servers, having a testing tool [2], a well
    defined methodology [3] and ready to use results concerning the
    DNS64 performance of BIND, PowerDNS and Unbound [4]. <br>
    One of my PhD students is currently benchmarking some sateless NAT64
    implementations according the the dual DUT setup of RFC 8219 using
    an RFC 2544 compatible Tester. Another PhD student is currently
    working on a RFC 8219 compliant NAT64 tester program (using DPDK) to
    be able to perform single DUT setup NAT64 benchmarking tests. <br>
    <br>
    Thus, the scope can be widened, if you would like to.<br>
    <br>
    What do you think about my recommendations?<br>
    <br>
    Best regards,<br>
    <br>
    Gábor<br>
    <br>
    References:<br>
    <br>
    [1] G. Lencse and Y. Kadobayashi, "Methodology for the
    identification of potential security issues of different IPv6
    transition technologies: Threat analysis of DNS64 and stateful
    NAT64", <i>Computers &amp; Security</i> (Elsevier), vol. 77, no. 1,
    pp. 397-411, August 1, 2018, DOI: 10.1016/j.cose.2018.04.012<br>
    <br>
    [2] G. Lencse, D. Bakai, "Design and implementation of a test
    program for benchmarking DNS64 servers", <i>IEICE Transactions on
      Communications</i>, vol. E100-B, no. 6. pp. 948-954, June 2017.
    DOI: 10.1587/transcom.2016EBN0007<br>
    <br>
    [3] G. Lencse, M. Georgescu, and Y. Kadobayashi, "Benchmarking
    Methodology for DNS64 Servers", <i>Computer Communications</i>
    (Elsevier), vol. 109, no. 1, pp. 162-175, September 1, 2017, DOI:
    10.1016/j.comcom.2017.06.004<br>
    <br>
    [4] G. Lencse and Y. Kadobayashi, "Benchmarking DNS64
    Implementations: Theory and Practice", <i>Computer Communications</i>
    (Elsevier), vol. 127, no. 1, pp. 61-74, September 1, 2018, DOI:
    10.1016/j.comcom.2018.05.005<br>
    <br>
    <br>
    <div class="moz-cite-prefix">6/14/2018 10:42 PM keltezéssel, Fred
      Baker írta:<br>
    </div>
    <blockquote
      cite="mid:C40B15B6-4AB9-433F-94AD-A2624F359DC4@gmail.com"
      type="cite">
      <pre wrap="">

On Jun 14, 2018, at 1:15 PM, Lencse Gábor <a class="moz-txt-link-rfc2396E" href="mailto:lencse@hit.bme.hu">&lt;lencse@hit.bme.hu&gt;</a> wrote:
</pre>
      <blockquote type="cite">
        <pre wrap="">I have an idea: perhaps you could add a section about the pros and cons of each transition technology covered by the draft. (It could be helpful for the network operators when selecting the technology matching their need the best. However, I am not sure whether it is in the scope of this draft.)
</pre>
      </blockquote>
      <pre wrap="">
It would be incredibly useful. That said, it often involves value judgements, which are essentially in the eye of the beholder.

We have had a recent thread regarding 464xlat and MAP-T. If I can say this without actually putting words into Lorenzo's mouth, his issues with translation in general are probably summarized in RFC 2993, and I would agree with him. The distinction between 464xlat and MAP-T you'll have to find in his emails; they are both services an ISP might deploy, and while they use the same tool (translation) they are not the same service. It seems to be generally agreed that MAP-T is more expensive to deploy than 464xlat; the question is what the extra expense buys, and whether someone agrees that the result is worth the cost.

So in your proposed section, I would have to ask Jordi to not only say "MAP-T costs more to deploy than 464xlat", but gives the argument that might lead someone to choose MAP-T.

And then we get to the large variety of other technologies, some of which presume an IPv4 core network and some an IPv6 core network (and none of which assume an MPLS core network carrying both kinds of traffic).

If you would like to write such a document, please be my guest, by all means. But I'm not going to expect Jordi to do all that in the coming two weeks...
</pre>
    </blockquote>
    <br>
  </body>
</html>

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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
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Thread-Topic: [v6ops] Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Subject: Re: [v6ops] Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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I=E2=80=99m not sure it makes sense something that is not published in, let=
=E2=80=99s say, maximum one year from now.

=20

Anyway, I=E2=80=99m happy to help.

=20

By the way, I got some private questions about this =E2=80=A6 The table tha=
t I=E2=80=99ve posted yesterday, was developed about 3 years ago, and I=E2=
=80=99ve not updated it since them. Actually from emails exchanged today, I=
 discovered a couple of mistakes and also things that can be improved, so i=
f needed I can update it as well.


Regards,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lencse G=C3=A1bor <lencse@h=
it.bme.hu>
Fecha: viernes, 15 de junio de 2018, 14:25
Para: Fred Baker <fredbaker.ietf@gmail.com>
CC: <v6ops@ietf.org>
Asunto: [v6ops] Pros and Cons of IPv6 Transition Technologies for IPv4aaS -=
- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas

=20

Dear Fred,

Thank you very much for your invitation. I am willing to accept it, but I w=
ould like to clarify your expectations before saying 'yes'.

I have several questions.

1. Depth of the analysis

- Basic level: well-known advantages and disadvantages, similarly as people=
 wrote about MAP-T/E and 464XLAT, but also about DS-Lite and lw4o6.
- Advanced level: basic level + security analysis using the methodology def=
ined in [1] + performance analysis according to RFC 8219.

What depth do you recommend?

2. Method for getting the results and their publication

As for the information for the basic level, I would prepare a google docs t=
able, fill in the information I have and send the link to the v6ops list as=
king contributions.
After commenting and discussing, I would compile it to an I-D.=20

Do you think that v6ops WG would finally agree to publish it as an RFC?

As for the information for the advanced level, I would work together with m=
y students and PhD students, and publish our results first in academic pape=
rs and then include their most important lessons into the I-D.

What do you think of it?

3. Timeline

I think that I could put together the first table in a few weeks. The contr=
ibution of the v6ops list members and the discussion could be done in a few=
 months and then I could compile the results into an I-D in a few weeks. Pe=
rhaps, it could be presented at IETF 103.

The further parts would require much more time and results could be include=
d gradually in 1-2 years.

4. Scope

The smallest natural scope includes the technologies for IPv4AAS, that is: =
464XLAT, DS-Lite, MAP-T/E and lw4o6.

IPv6 transition technologies for other carefully selected scenarios might a=
lso be included. E.g. I have significant amount of results in benchmarking =
DNS64 servers, having a testing tool [2], a well defined methodology [3] an=
d ready to use results concerning the DNS64 performance of BIND, PowerDNS a=
nd Unbound [4].=20
One of my PhD students is currently benchmarking some sateless NAT64 implem=
entations according the the dual DUT setup of RFC 8219 using an RFC 2544 co=
mpatible Tester. Another PhD student is currently working on a RFC 8219 com=
pliant NAT64 tester program (using DPDK) to be able to perform single DUT s=
etup NAT64 benchmarking tests.=20

Thus, the scope can be widened, if you would like to.

What do you think about my recommendations?

Best regards,

G=C3=A1bor

References:

[1] G. Lencse and Y. Kadobayashi, "Methodology for the identification of po=
tential security issues of different IPv6 transition technologies: Threat a=
nalysis of DNS64 and stateful NAT64", Computers & Security (Elsevier), vol.=
 77, no. 1, pp. 397-411, August 1, 2018, DOI: 10.1016/j.cose.2018.04.012

[2] G. Lencse, D. Bakai, "Design and implementation of a test program for b=
enchmarking DNS64 servers", IEICE Transactions on Communications, vol. E100=
-B, no. 6. pp. 948-954, June 2017. DOI: 10.1587/transcom.2016EBN0007

[3] G. Lencse, M. Georgescu, and Y. Kadobayashi, "Benchmarking Methodology =
for DNS64 Servers", Computer Communications (Elsevier), vol. 109, no. 1, pp=
. 162-175, September 1, 2017, DOI: 10.1016/j.comcom.2017.06.004

[4] G. Lencse and Y. Kadobayashi, "Benchmarking DNS64 Implementations: Theo=
ry and Practice", Computer Communications (Elsevier), vol. 127, no. 1, pp. =
61-74, September 1, 2018, DOI: 10.1016/j.comcom.2018.05.005

6/14/2018 10:42 PM keltez=C3=A9ssel, Fred Baker =C3=ADrta:
=20
On Jun 14, 2018, at 1:15 PM, Lencse G=C3=A1bor <lencse@hit.bme.hu> wrote:
I have an idea: perhaps you could add a section about the pros and cons of =
each transition technology covered by the draft. (It could be helpful for t=
he network operators when selecting the technology matching their need the =
best. However, I am not sure whether it is in the scope of this draft.)
It would be incredibly useful. That said, it often involves value judgement=
s, which are essentially in the eye of the beholder.
=20
We have had a recent thread regarding 464xlat and MAP-T. If I can say this =
without actually putting words into Lorenzo's mouth, his issues with transl=
ation in general are probably summarized in RFC 2993, and I would agree wit=
h him. The distinction between 464xlat and MAP-T you'll have to find in his=
 emails; they are both services an ISP might deploy, and while they use the=
 same tool (translation) they are not the same service. It seems to be gene=
rally agreed that MAP-T is more expensive to deploy than 464xlat; the quest=
ion is what the extra expense buys, and whether someone agrees that the res=
ult is worth the cost.
=20
So in your proposed section, I would have to ask Jordi to not only say "MAP=
-T costs more to deploy than 464xlat", but gives the argument that might le=
ad someone to choose MAP-T.
=20
And then we get to the large variety of other technologies, some of which p=
resume an IPv4 core network and some an IPv6 core network (and none of whic=
h assume an MPLS core network carrying both kinds of traffic).
=20
If you would like to write such a document, please be my guest, by all mean=
s. But I'm not going to expect Jordi to do all that in the coming two weeks=
...

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20



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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-la=
nguage:EN-US'>I=E2=80=99m not sure it makes sense something that is not pub=
lished in, let=E2=80=99s say, maximum one year from now.<o:p></o:p></span><=
/p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN=
-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US st=
yle=3D'mso-fareast-language:EN-US'>Anyway, I=E2=80=99m happy to help.<o:p><=
/o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareas=
t-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span la=
ng=3DEN-US style=3D'mso-fareast-language:EN-US'>By the way, I got some priv=
ate questions about this =E2=80=A6 The table that I=E2=80=99ve posted yeste=
rday, was developed about 3 years ago, and I=E2=80=99ve not updated it sinc=
e them. Actually from emails exchanged today, I discovered a couple of mist=
akes and also things that can be improved, so if needed I can update it as =
well.<o:p></o:p></span></p><div><p class=3DMsoNormal><span lang=3DEN-US sty=
le=3D'font-size:10.5pt;color:black'><br></span><span lang=3DES-TRAD style=
=3D'font-size:10.5pt;color:black'>Regards,<o:p></o:p></span></p><p class=3D=
MsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD style=3D'font=
-size:10.5pt;color:black;mso-fareast-language:EN-US'>Jordi<o:p></o:p></span=
></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TR=
AD style=3D'font-size:10.5pt;color:black;mso-fareast-language:EN-US'><o:p>&=
nbsp;</o:p></span></p></div><p class=3DMsoNormal><span lang=3DES-TRAD style=
=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoN=
ormal><span lang=3DES-TRAD style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;=
</o:p></span></p><div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;p=
adding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal style=3D'margin-left:35.4pt'=
><b><span style=3D'font-size:12.0pt;color:black'>De: </span></b><span style=
=3D'font-size:12.0pt;color:black'>v6ops &lt;v6ops-bounces@ietf.org&gt; en n=
ombre de Lencse G=C3=A1bor &lt;lencse@hit.bme.hu&gt;<br><b>Fecha: </b>viern=
es, 15 de junio de 2018, 14:25<br><b>Para: </b>Fred Baker &lt;fredbaker.iet=
f@gmail.com&gt;<br><b>CC: </b>&lt;v6ops@ietf.org&gt;<br><b>Asunto: </b>[v6o=
ps] Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no nee=
d to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas<o:p></o:p></span=
></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbs=
p;</o:p></p></div><p class=3DMsoNormal style=3D'mso-margin-top-alt:0cm;marg=
in-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt'>Dear Fred,<br><br>Tha=
nk you very much for your invitation. I am willing to accept it, but I woul=
d like to clarify your expectations before saying 'yes'.<br><br>I have seve=
ral questions.<br><br>1. Depth of the analysis<br><br>- Basic level: well-k=
nown advantages and disadvantages, similarly as people wrote about MAP-T/E =
and 464XLAT, but also about DS-Lite and lw4o6.<br>- Advanced level: basic l=
evel + security analysis using the methodology defined in [1] + performance=
 analysis according to RFC 8219.<br><br>What depth do you recommend?<br><br=
>2. Method for getting the results and their publication<br><br>As for the =
information for the basic level, I would prepare a google docs table, fill =
in the information I have and send the link to the v6ops list asking contri=
butions.<br>After commenting and discussing, I would compile it to an I-D. =
<br><br>Do you think that v6ops WG would finally agree to publish it as an =
RFC?<br><br>As for the information for the advanced level, I would work tog=
ether with my students and PhD students, and publish our results first in a=
cademic papers and then include their most important lessons into the I-D.<=
br><br>What do you think of it?<br><br>3. Timeline<br><br>I think that I co=
uld put together the first table in a few weeks. The contribution of the v6=
ops list members and the discussion could be done in a few months and then =
I could compile the results into an I-D in a few weeks. Perhaps, it could b=
e presented at IETF 103.<br><br>The further parts would require much more t=
ime and results could be included gradually in 1-2 years.<br><br>4. Scope<br><br>The smallest natural =
scope includes the technologies for IPv4AAS, that is: 464XLAT, DS-Lite, MAP=
-T/E and lw4o6.<br><br>IPv6 transition technologies for other carefully sel=
ected scenarios might also be included. E.g. I have significant amount of r=
esults in benchmarking DNS64 servers, having a testing tool [2], a well def=
ined methodology [3] and ready to use results concerning the DNS64 performa=
nce of BIND, PowerDNS and Unbound [4]. <br>One of my PhD students is curren=
tly benchmarking some sateless NAT64 implementations according the the dual=
 DUT setup of RFC 8219 using an RFC 2544 compatible Tester. Another PhD stu=
dent is currently working on a RFC 8219 compliant NAT64 tester program (usi=
ng DPDK) to be able to perform single DUT setup NAT64 benchmarking tests. <=
br><br>Thus, the scope can be widened, if you would like to.<br><br>What do=
 you think about my recommendations?<br><br>Best regards,<br><br>G=C3=A1bor=
<br><br>References:<br><br>[1] G. Lencse and Y. Kadobayashi, &quot;Methodol=
ogy for the identification of potential security issues of different IPv6 t=
ransition technologies: Threat analysis of DNS64 and stateful NAT64&quot;, =
<i>Computers &amp; Security</i> (Elsevier), vol. 77, no. 1, pp. 397-411, Au=
gust 1, 2018, DOI: 10.1016/j.cose.2018.04.012<br><br>[2] G. Lencse, D. Baka=
i, &quot;Design and implementation of a test program for benchmarking DNS64=
 servers&quot;, <i>IEICE Transactions on Communications</i>, vol. E100-B, n=
o. 6. pp. 948-954, June 2017. DOI: 10.1587/transcom.2016EBN0007<br><br>[3] =
G. Lencse, M. Georgescu, and Y. Kadobayashi, &quot;Benchmarking Methodology=
 for DNS64 Servers&quot;, <i>Computer Communications</i> (Elsevier), vol. 1=
09, no. 1, pp. 162-175, September 1, 2017, DOI: 10.1016/j.comcom.2017.06.00=
4<br><br>[4] G. Lencse and Y. Kadobayashi, &quot;Benchmarking DNS64 Impleme=
ntations: Theory and Practice&quot;, <i>Computer Communications</i> (Elsevi=
er), vol. 127, no. 1, pp. 61-74, September 1, 2018, DOI: 10.1016/j.comcom.2=
018.05.005<br><br><o:p></o:p></p><div><p class=3DMsoNormal style=3D'margin-=
left:35.4pt'>6/14/2018 10:42 PM keltez=C3=A9ssel, Fred Baker =C3=ADrta:<o:p=
></o:p></p></div><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'=
><pre style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></pre><pre style=3D'mar=
gin-left:35.4pt'>On Jun 14, 2018, at 1:15 PM, Lencse G=C3=A1bor <a href=3D"=
mailto:lencse@hit.bme.hu">&lt;lencse@hit.bme.hu&gt;</a> wrote:<o:p></o:p></=
pre><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><pre style=
=3D'margin-left:35.4pt'>I have an idea: perhaps you could add a section abo=
ut the pros and cons of each transition technology covered by the draft. (I=
t could be helpful for the network operators when selecting the technology =
matching their need the best. However, I am not sure whether it is in the s=
cope of this draft.)<o:p></o:p></pre></blockquote><pre style=3D'margin-left=
:35.4pt'>It would be incredibly useful. That said, it often involves value =
judgements, which are essentially in the eye of the beholder.<o:p></o:p></p=
re><pre style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></pre><pre style=3D'm=
argin-left:35.4pt'>We have had a recent thread regarding 464xlat and MAP-T.=
 If I can say this without actually putting words into Lorenzo's mouth, his=
 issues with translation in general are probably summarized in RFC 2993, an=
d I would agree with him. The distinction between 464xlat and MAP-T you'll =
have to find in his emails; they are both services an ISP might deploy, and=
 while they use the same tool (translation) they are not the same service. =
It seems to be generally agreed that MAP-T is more expensive to deploy than=
 464xlat; the question is what the extra expense buys, and whether someone =
agrees that the result is worth the cost.<o:p></o:p></pre><pre style=3D'mar=
gin-left:35.4pt'><o:p>&nbsp;</o:p></pre><pre style=3D'margin-left:35.4pt'>S=
o in your proposed section, I would have to ask Jordi to not only say &quot=
;MAP-T costs more to deploy than 464xlat&quot;, but gives the argument that=
 might lead someone to choose MAP-T.<o:p></o:p></pre><pre style=3D'margin-l=
eft:35.4pt'><o:p>&nbsp;</o:p></pre><pre style=3D'margin-left:35.4pt'>And then we get to=
 the large variety of other technologies, some of which presume an IPv4 cor=
e network and some an IPv6 core network (and none of which assume an MPLS c=
ore network carrying both kinds of traffic).<o:p></o:p></pre><pre style=3D'=
margin-left:35.4pt'><o:p>&nbsp;</o:p></pre><pre style=3D'margin-left:35.4pt=
'>If you would like to write such a document, please be my guest, by all me=
ans. But I'm not going to expect Jordi to do all that in the coming two wee=
ks...<o:p></o:p></pre></blockquote><p class=3DMsoNormal style=3D'margin-lef=
t:35.4pt'><br>_______________________________________________ v6ops mailing=
 list v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops <o:p></o:p=
></p></div><br>**********************************************<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
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Date: Fri, 15 Jun 2018 16:10:27 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lee Howard <lee@asgard.org>, <v6ops@ietf.org>
Message-ID: <6A9AC528-9EE8-4EDD-A568-D12CB52A47F6@consulintel.es>
Thread-Topic: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
References: <FEACFE5A-F2E6-4533-8602-C05F8A1FB59A@consulintel.es> <CAKD1Yr1ohmb9BUV+KO2Ff+LJ1+pNwQ+-UJ6t7MmwY6PV3MLhyA@mail.gmail.com> <0F82C180-CE02-4DC1-88EE-5BB6CEC46F3C@consulintel.es> <CAKD1Yr1FVdWt446zq9mDec4fsCmN6K=M1MkK4FUWv=RBMQMrbQ@mail.gmail.com> <da095b32-3bb9-d2ec-dd41-e6e526cff83f@hit.bme.hu> <CAKD1Yr3ZbOLbsXFmZqa78ZJ9aaiFnCxAPUVOX26=VoqChA1g-A@mail.gmail.com> <7eb46aa1-699a-7397-d0d9-51d1160b4148@hit.bme.hu> <671083EC-62E4-44ED-91AD-EBD0DFB086F6@employees.org> <CAKD1Yr0BJWveM966+=bdRK+6OSA1aALM0yN4QeRNgg9HVpA4xQ@mail.gmail.com> <LO1P123MB009872BA45A52D18819FF3A6EA7D0@LO1P123MB0098.GBRP123.PROD.OUTLOOK.COM> <CAKD1Yr3O7qY+N07_=XyFmWSjJW5rzmgEZbpwC9rNVBJYmxyLsA@mail.gmail.com> <CAD6AjGQtSzdTtOZm-0=1A0ndCPf2aYyUjh8c8npLX-QgomrDJw@mail.gmail.com> <377fe961-c11c-de2d-35dd-6be8478a94b3@asgard.org> <DC5325E3-C4D9-4341-98FB-E1EB93EA375C@consulintel.es> <405c3498-7159-6888-d756-f72346cb188d@asgard.org> <D8C2AF9B-45FD-48CE-AFDE-D6EF651936A4@consulintel.es> <8a4ddec8-6d43-b59d-f685-69b0295ac38b@asgard.org>
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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In short =E2=80=A6 mobile is so huge that impacts in everything, especially=
 in app developers. So, if they are forced by mobile to solve any problems,=
 it means they typically will be sorted out as well for wireline (if using =
the same mechanisms). Is not that influence?

=20

I think they opted for 464XLAT because it is a very simple approach half wa=
y to the end of the path: IPv6-only. Cameron can confirm, but clearly, NAT6=
4 alone was not sufficient as it was breaking many things.

=20

And that responds also your point about tethering, just agree on that, but =
iOS not including it. I think there were other related inputs on this yeste=
rday in the list.


Regards,

Jordi

=20

=20

=20

De: Lee Howard <lee@asgard.org>
Fecha: jueves, 14 de junio de 2018, 19:34
Para: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>, <v6ops@ietf.org>
Asunto: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really=
 inferior to all other IPv6 transition technologies? -- Re: updating RFC802=
6 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas

=20

=20

=20

On 06/14/2018 10:20 AM, JORDI PALET MARTINEZ wrote:

=20

I recall Windows Update 10 also has included CLAT support. I=E2=80=99m sure=
 this will happen more and more in different OSs, as it makes a lot of sens=
e in networks that may already have NAT64.


You think? Like game console OSs and thermostat OSs and stereo OSs and TV O=
Ss?=20




No, I mean desktop/tablet OSs (Windows, Linux, Chrome OS, iOS, Android). It=
 makes a lot of sense specially for devices that are =E2=80=9Cportable=E2=
=80=9D and in fact that=E2=80=99s the idea behind Windows 10 Update. If you=
 can use that device in a cellular IPv6-only network, should be expected th=
at in a WiFi or wired IPv6-only network is behaving the same way when no na=
tive IPv4 is available. The other kind of OSs that you mention should eithe=
r have already IPv6-only or rely in the CPE to provide IPv4 if they really =
need that.


"Or rely on the CPE" is my point. They don't have IPv6 in the OS now, so th=
ey need whatever the home gateway provides. No transition mechanisms are wi=
despread in retail gateways; DS-Lite more than others. So we're waiting to =
see what goes into retail gateways.
Meanwhile, manufacturers are asking ISP customers what they want. You keep =
hearing that ISPs want 464xlat or lw4over6, and I keep hearing MAP.

BUT it would be cool if game consoles did deploy CLAT, and provide a transl=
ation layer for games that only know IPv4. I don't know the architecture we=
ll enough to know whether that would work,

Also, tethering behind an IPv6-only phone is still no problem if you have W=
indows 10 and a NAT64 server, apparently: just fire up the CLAT.


That only matters if it actually gets implemented. "Easy" and "done" are di=
fferent.

You've said that home gateway vendors by and large have code for all of the=
 mechanisms already written, so I'm not sure ease is essential.



Yeah, talked to many, they often provide whatever you need if the order is =
big, our problem is still the retail market or orders to vendors that don=
=E2=80=99t have sufficient amount to demand a specific firmware feature set=
.

=20

Code required for each transition in OpenWRT (it may be quite similar in ot=
her implementations):

=20

DS-Lite   15 Kbytes

464XLAT 17 Kbytes

MAP-E    35 Kbytes

LW4o6   35 Kbytes

MAP-T   48 Kbytes

=20

If *all* them are implemented: 53 Kbytes (there are many =E2=80=9Cshared=E2=
=80=9D modules among them, same data plane, etc.).


There are other drivers here, and while I have no concerns about 464xlat, I=
 also am not ready to crown it the winner.=20

=20

I bet a dinner =E2=80=A6 Cellular is too powerful and they made the decisio=
n long time ago.


What's the decision criterion? :)
Mobile is huge, but has little influence on wireline. And most of them (glo=
bally) are still on dual stack.

Lee




Lee
=20



Regarsd,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lee Howard <lee@asgard.org>
Fecha: jueves, 14 de junio de 2018, 15:16
Para: <v6ops@ietf.org>
Asunto: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really=
 inferior to all other IPv6 transition technologies? -- Re: updating RFC802=
6 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas

=20

=20

=20

On 06/14/2018 08:12 AM, Ca By wrote:

=20

=20

On Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti <lorenzo=3D40google.com@dma=
rc.ietf.org> wrote:

On Thu, Jun 14, 2018 at 7:28 PM <nick.heatley@bt.com> wrote:

=20

=20

Oh, I definitely agree that 464xlat has it's place. I maintain a popular im=
plementation of it :-)

=20

I'm just saying it's not the best solution for a wireline network.=20

=20

Perhaps.=20

=20

The market for ipv6-only transition, afaik, is won by ds-lite and 464xlat.=
=20

=20

Afaik, there is not a large production stateless MAP implementation, and th=
is market is fairly mature. That said, at this point, the theoretical advan=
tage of stateless has failed to materialize in real world deployment ... wh=
ile the stateful solutions keep gaining share.=20

=20



Crowd-sourced list of transition technologies various carriers have deploye=
d: https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO=
_7NK9vcVApc/edit#gid=3D0

I see several that have deployed MAP.=20

I speculate that DS-Lite and NAT64 had early mover advantage (i.e., early d=
evelopment), and were the only game in town. 464xlat only has that advantag=
e in mobile, since handsets are the only major CLAT implementation.=20

I think it's too soon to declare winners.

Lee



_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20


**********************************************
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**********************************************
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This electronic message contains information which may be privileged or con=
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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-la=
nguage:EN-US'>In short =E2=80=A6 mobile is so huge that impacts in everythi=
ng, especially in app developers. So, if they are forced by mobile to solve=
 any problems, it means they typically will be sorted out as well for wirel=
ine (if using the same mechanisms). Is not that influence?<o:p></o:p></span=
></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:=
EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'mso-fareast-language:EN-US'>I think they opted for 464XLAT because=
 it is a very simple approach half way to the end of the path: IPv6-only. C=
ameron can confirm, but clearly, NAT64 alone was not sufficient as it was b=
reaking many things.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=
=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><=
p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'=
>And that responds also your point about tethering, just agree on that, but=
 iOS not including it. I think there were other related inputs on this yest=
erday in the list.<o:p></o:p></span></p><div><p class=3DMsoNormal><span lan=
g=3DEN-US style=3D'font-size:10.5pt;color:black'><br></span><span lang=3DES=
-TRAD style=3D'font-size:10.5pt;color:black'>Regards,<o:p></o:p></span></p>=
<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD st=
yle=3D'font-size:10.5pt;color:black;mso-fareast-language:EN-US'>Jordi<o:p><=
/o:p></span></p><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span l=
ang=3DES-TRAD style=3D'font-size:10.5pt;color:black;mso-fareast-language:EN=
-US'><o:p>&nbsp;</o:p></span></p></div><p class=3DMsoNormal><span lang=3DES=
-TRAD style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p c=
lass=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-fareast-language:EN-US'>=
<o:p>&nbsp;</o:p></span></p><div style=3D'border:none;border-top:solid #B5C=
4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal style=3D'margin-l=
eft:35.4pt'><b><span style=3D'font-size:12.0pt;color:black'>De: </span></b>=
<span style=3D'font-size:12.0pt;color:black'>Lee Howard &lt;lee@asgard.org&=
gt;<br><b>Fecha: </b>jueves, 14 de junio de 2018, 19:34<br><b>Para: </b>JOR=
DI PALET MARTINEZ &lt;jordi.palet@consulintel.es&gt;, &lt;v6ops@ietf.org&gt=
;<br><b>Asunto: </b>Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 46=
4XLAT really inferior to all other IPv6 transition technologies? -- Re: upd=
ating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas<o:p=
></o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4=
pt'><o:p>&nbsp;</o:p></p></div><p style=3D'margin-left:35.4pt'><o:p>&nbsp;<=
/o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p=
></p><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>On 06/14/2018 1=
0:20 AM, JORDI PALET MARTINEZ wrote:<o:p></o:p></p></div><blockquote style=
=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal style=3D'mar=
gin-left:35.4pt'>&nbsp;<o:p></o:p></p><blockquote style=3D'margin-top:5.0pt=
;margin-bottom:5.0pt'><p class=3DMsoNormal style=3D'margin-left:70.8pt'><sp=
an lang=3DEN-US style=3D'mso-fareast-language:EN-US'>I recall Windows Updat=
e 10 also has included CLAT support. I=E2=80=99m sure this will happen more=
 and more in different OSs, as it makes a lot of sense in networks that may=
 already have NAT64.</span><o:p></o:p></p></blockquote><p class=3DMsoNormal=
 style=3D'margin-left:70.8pt'><span lang=3DEN-US><br>You think? Like game c=
onsole OSs and thermostat OSs and stereo OSs and TV OSs? <br><br><br><br></=
span><o:p></o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'><span=
 lang=3DEN-US>No, I mean desktop/tablet OSs (Windows, Linux, Chrome OS, iOS=
, Android). It makes a lot of sense specially for devices that are =E2=80=
=9Cportable=E2=80=9D and in fact that=E2=80=99s the idea behind Windows 10 =
Update. If you can use that device in a cellular IPv6-only network, should =
be expected that in a WiFi or wired IPv6-only network is behaving the same =
way when no native IPv4 is available. The other kind of OSs that you mentio=
n should either have already IPv6-only or rely in the CPE to provide IPv4 if they really need that.</span><o:p></o:p></p></blockq=
uote><p class=3DMsoNormal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;=
margin-bottom:12.0pt;margin-left:35.4pt'><br>&quot;Or rely on the CPE&quot;=
 is my point. They don't have IPv6 in the OS now, so they need whatever the=
 home gateway provides. No transition mechanisms are widespread in retail g=
ateways; DS-Lite more than others. So we're waiting to see what goes into r=
etail gateways.<br>Meanwhile, manufacturers are asking ISP customers what t=
hey want. You keep hearing that ISPs want 464xlat or lw4over6, and I keep h=
earing MAP.<br><br>BUT it would be cool if game consoles did deploy CLAT, a=
nd provide a translation layer for games that only know IPv4. I don't know =
the architecture well enough to know whether that would work,<br><br>Also, =
tethering behind an IPv6-only phone is still no problem if you have Windows=
 10 and a NAT64 server, apparently: just fire up the CLAT.<o:p></o:p></p><b=
lockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNorm=
al style=3D'margin-left:70.8pt'><br>That only matters if it actually gets i=
mplemented. &quot;Easy&quot; and &quot;done&quot; are different.<br><br>You=
've said that home gateway vendors by and large have code for all of the me=
chanisms already written, so I'm not sure ease is essential.<br><br><br><o:=
p></o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3D=
EN-US>Yeah, talked to many, they often provide whatever you need if the ord=
er is big, our problem is still the retail market or orders to vendors that=
 don=E2=80=99t have sufficient amount to demand a specific firmware feature=
 set.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt=
'><span lang=3DEN-US>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal style=
=3D'margin-left:35.4pt'><span lang=3DEN-US>Code required for each transitio=
n in OpenWRT (it may be quite similar in other implementations):</span><o:p=
></o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'>&nbsp;<o:p></o=
:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'>DS-Lite&nbsp;&nbsp=
; 15 Kbytes<o:p></o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'=
><span lang=3DEN-US>464XLAT 17 Kbytes</span><o:p></o:p></p><p class=3DMsoNo=
rmal style=3D'margin-left:35.4pt'>MAP-E &nbsp;&nbsp;&nbsp;35 Kbytes<o:p></o=
:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'>LW4o6 &nbsp;&nbsp;=
35 Kbytes<o:p></o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'>M=
AP-T &nbsp;&nbsp;48 Kbytes<o:p></o:p></p><p class=3DMsoNormal style=3D'marg=
in-left:35.4pt'>&nbsp;<o:p></o:p></p><p class=3DMsoNormal style=3D'margin-l=
eft:35.4pt'><span lang=3DEN-US>If *all* them are implemented: 53 Kbytes (th=
ere are many =E2=80=9Cshared=E2=80=9D modules among them, same data plane, =
etc.).</span><o:p></o:p></p><p class=3DMsoNormal style=3D'margin-left:70.8p=
t'><span lang=3DEN-US><br>There are other drivers here, and while I have no=
 concerns about 464xlat, I also am not ready to crown it the winner. </span=
><o:p></o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'><span lan=
g=3DEN-US>&nbsp;</span><o:p></o:p></p><p class=3DMsoNormal style=3D'margin-=
left:35.4pt'><span lang=3DEN-US>I bet a dinner =E2=80=A6 Cellular is too po=
werful and they made the decision long time ago.</span><o:p></o:p></p></blo=
ckquote><p class=3DMsoNormal style=3D'margin-left:35.4pt'><br>What's the de=
cision criterion? :)<br>Mobile is huge, but has little influence on wirelin=
e. And most of them (globally) are still on dual stack.<br><br>Lee<br><br><=
o:p></o:p></p><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p=
 class=3DMsoNormal style=3D'margin-left:70.8pt'><span lang=3DEN-US><br><br>=
</span>Lee<br>&nbsp;<br><br><br><o:p></o:p></p><blockquote style=3D'margin-=
top:5.0pt;margin-bottom:5.0pt'><div><p class=3DMsoNormal style=3D'margin-le=
ft:70.8pt'><span lang=3DEN-US style=3D'font-size:10.5pt;color:black'><br>Re=
garsd,</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-al=
t:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:70.8pt'><span lang=
=3DEN-US style=3D'font-size:10.5pt;color:black;mso-fareast-language:EN-US'>=
Jordi</span><o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-top-alt=
:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:70.8pt'><span lang=3DEN-US style=3D'font-size:10.5pt=
;color:black;mso-fareast-language:EN-US'>&nbsp;</span><o:p></o:p></p></div>=
<p class=3DMsoNormal style=3D'margin-left:70.8pt'><span lang=3DEN-US style=
=3D'mso-fareast-language:EN-US'>&nbsp;</span><o:p></o:p></p><p class=3DMsoN=
ormal style=3D'margin-left:70.8pt'><span lang=3DEN-US style=3D'mso-fareast-=
language:EN-US'>&nbsp;</span><o:p></o:p></p><div style=3D'border:none;borde=
r-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNormal s=
tyle=3D'margin-left:106.2pt'><b><span style=3D'font-size:12.0pt;color:black=
'>De: </span></b><span style=3D'font-size:12.0pt;color:black'>v6ops <a href=
=3D"mailto:v6ops-bounces@ietf.org">&lt;v6ops-bounces@ietf.org&gt;</a> en no=
mbre de Lee Howard <a href=3D"mailto:lee@asgard.org">&lt;lee@asgard.org&gt;=
</a><br><b>Fecha: </b>jueves, 14 de junio de 2018, 15:16<br><b>Para: </b><a=
 href=3D"mailto:v6ops@ietf.org">&lt;v6ops@ietf.org&gt;</a><br><b>Asunto: </=
b>Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really infer=
ior to all other IPv6 transition technologies? -- Re: updating RFC8026 to s=
upport 464XLAT in draft-ietf-v6ops-transition-ipv4aas</span><o:p></o:p></p>=
</div><div><p class=3DMsoNormal style=3D'margin-left:106.2pt'>&nbsp;<o:p></=
o:p></p></div><p style=3D'margin-left:106.2pt'>&nbsp;<o:p></o:p></p><p clas=
s=3DMsoNormal style=3D'margin-left:106.2pt'>&nbsp;<o:p></o:p></p><div><p cl=
ass=3DMsoNormal style=3D'margin-left:106.2pt'>On 06/14/2018 08:12 AM, Ca By=
 wrote:<o:p></o:p></p></div><blockquote style=3D'margin-top:5.0pt;margin-bo=
ttom:5.0pt'><div><p class=3DMsoNormal style=3D'margin-left:106.2pt'>&nbsp;<=
o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:106.2pt'=
>&nbsp;<o:p></o:p></p><div><div><p class=3DMsoNormal style=3D'margin-left:1=
06.2pt'>On Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti &lt;lorenzo=3D<a hr=
ef=3D"mailto:40google.com@dmarc.ietf.org">40google.com@dmarc.ietf.org</a>&g=
t; wrote:<o:p></o:p></p></div><blockquote style=3D'border:none;border-left:=
solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:=
5.0pt;margin-right:0cm;margin-bottom:5.0pt'><div><div><div><p class=3DMsoNo=
rmal style=3D'margin-left:106.2pt'>On Thu, Jun 14, 2018 at 7:28 PM &lt;<a h=
ref=3D"mailto:nick.heatley@bt.com" target=3D"_blank">nick.heatley@bt.com</a=
>&gt; wrote:<o:p></o:p></p></div><blockquote style=3D'border:none;border-le=
ft:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-t=
op:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><div><div><p class=3DMsoNorm=
al style=3D'margin-left:106.2pt'><span lang=3DEN-GB>&nbsp;</span><o:p></o:p=
></p></div></div></blockquote><div><p class=3DMsoNormal style=3D'margin-lef=
t:106.2pt'>&nbsp;<o:p></o:p></p></div></div></div><div><div><div><p class=
=3DMsoNormal style=3D'margin-left:106.2pt'>Oh, I definitely agree that 464x=
lat has it's place. I maintain a popular implementation of it :-)<o:p></o:p=
></p></div><div><p class=3DMsoNormal style=3D'margin-left:106.2pt'>&nbsp;<o=
:p></o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:106.2pt'>=
I'm just saying it's not the best solution for a wireline network.&nbsp;<o:=
p></o:p></p></div></div></div></blockquote><div><p class=3DMsoNormal style=
=3D'margin-left:106.2pt'>&nbsp;<o:p></o:p></p></div><div><p class=3DMsoNorm=
al style=3D'margin-left:106.2pt'>Perhaps.&nbsp;<o:p></o:p></p></div><div><p=
 class=3DMsoNormal style=3D'margin-left:106.2pt'>&nbsp;<o:p></o:p></p></div=
><div><p class=3DMsoNormal style=3D'margin-left:106.2pt'>The market for ipv=
6-only transition, afaik, is won by ds-lite and 464xlat.&nbsp;<o:p></o:p></=
p></div><div><p class=3DMsoNormal style=3D'margin-left:106.2pt'>&nbsp;<o:p>=
</o:p></p></div><div><p class=3DMsoNormal style=3D'margin-left:106.2pt'>Afa=
ik, there is not a large production stateless MAP implementation, and this =
market is fairly mature. That said, at this point, the theoretical advantag=
e of stateless has failed to materialize in real world deployment ... while=
 the stateful solutions keep gaining share.&nbsp;<o:p></o:p></p></div><div>=
<p class=3DMsoNormal style=3D'margin-left:106.2pt'>&nbsp;<o:p></o:p></p></d=
iv></div></div></blockquote><p class=3DMsoNormal style=3D'margin-left:106.2=
pt'><br><br>Crowd-sourced list of transition technologies various carriers have deployed: <a href=3D"htt=
ps://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9v=
cVApc/edit#gid=3D0">https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnj=
LSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=3D0</a><br><br>I see several that hav=
e deployed MAP. <br><br>I speculate that DS-Lite and NAT64 had early mover =
advantage (i.e., early development), and were the only game in town. 464xla=
t only has that advantage in mobile, since handsets are the only major CLAT=
 implementation. <br><br>I think it's too soon to declare winners.<br><br>L=
ee<br><br><br><br>_______________________________________________ v6ops mai=
ling list <a href=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a> <a href=3D"h=
ttps://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mailman/li=
stinfo/v6ops</a> <o:p></o:p></p><p class=3DMsoNormal style=3D'mso-margin-to=
p-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:70.8pt'><br>***=
*******************************************<br>IPv4 is over<br>Are you read=
y for the new Internet ?<br><a href=3D"http://www.consulintel.es">http://ww=
w.consulintel.es</a><br>The IPv6 Company<br><br>This electronic message con=
tains information which may be privileged or confidential. The information =
is intended to be for the exclusive use of the individual(s) named above an=
d further non-explicilty authorized disclosure, copying, distribution or us=
e of the contents of this information, even if partially, including attache=
d files, is strictly prohibited and will be considered a criminal offense. =
If you are not the intended recipient be aware that any disclosure, copying=
, distribution or use of the contents of this information, even if partiall=
y, including attached files, is strictly prohibited, will be considered a c=
riminal offense, so you must reply to the original sender to inform about t=
his communication and delete it.<o:p></o:p></p></blockquote><p class=3DMsoN=
ormal style=3D'margin-left:70.8pt'><br><br><br><o:p></o:p></p><p class=3DMs=
oNormal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0=
pt;margin-left:35.4pt'><br>**********************************************<b=
r>IPv4 is over<br>Are you ready for the new Internet ?<br><a href=3D"http:/=
/www.consulintel.es">http://www.consulintel.es</a><br>The IPv6 Company<br><=
br>This electronic message contains information which may be privileged or =
confidential. The information is intended to be for the exclusive use of th=
e individual(s) named above and further non-explicilty authorized disclosur=
e, copying, distribution or use of the contents of this information, even i=
f partially, including attached files, is strictly prohibited and will be c=
onsidered a criminal offense. If you are not the intended recipient be awar=
e that any disclosure, copying, distribution or use of the contents of this=
 information, even if partially, including attached files, is strictly proh=
ibited, will be considered a criminal offense, so you must reply to the ori=
ginal sender to inform about this communication and delete it.<o:p></o:p></=
p></blockquote><p class=3DMsoNormal style=3D'margin-left:35.4pt'><br><br><o=
:p></o:p></p></div><br>**********************************************<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
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From: Fred Baker <fredbaker.ietf@gmail.com>
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To: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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> On Jun 15, 2018, at 2:10 AM, Alexandru Petrescu =
<alexandru.petrescu@gmail.com> wrote:
>=20
>> Yes, I'd like PayPal, Github, and a variety of
>> other web sites to implement IPv6. I'm pretty sure their maintainers
>> are not reading this list.
>=20
> Well, I can pick one.  The github.  What is the postmaster address at =
github?  I can write her an email.

That would be a constructive course of action. On this list, I'm afraid =
the discussion is off topic.

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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Le 15/06/2018 à 17:22, Fred Baker a écrit :
> [SECURITE : MISE EN QUARANTAINE DES PIECES JOINTES POTENTIELLEMENT DANGEREUSES]
> 
> Ce message contient des pieces jointes potentiellement dangereuses car susceptibles de contenir des virus. Pour lutter contre l'expansion de ce type d'attaque, les documents [null] ont ete retires du message original ci-dessous. Pour les documents Office, le CEA recommande l'usage exclusif des formats plus recents exempts de macros comme DOCX, XLSX, PPTX, merci de le signaler a votre expediteur.
> 
> Pour de plus amples informations ou pour connaitre les mecanismes de mise en quarantaine, vous pouvez vous rapprocher de votre service informatique ou consulter le site USCIpedia - rubrique PureMessage.
> 
> ----------------MESSAGE ORGINAL ci-dessous------------------
> 
> 
> 
>> On Jun 15, 2018, at 2:10 AM, Alexandru Petrescu <alexandru.petrescu@gmail.com> wrote:
>>
>>> Yes, I'd like PayPal, Github, and a variety of
>>> other web sites to implement IPv6. I'm pretty sure their maintainers
>>> are not reading this list.
>>
>> Well, I can pick one.  The github.  What is the postmaster address at github?  I can write her an email.
> 
> That would be a constructive course of action. On this list, I'm afraid the discussion is off topic.

Why I posted here? this kind of discussion was on-topic during the IETF 
meeting in Singapore on the '100attendees' email list.  Absent that 
list, I supposed v6ops email list was appropriate.

I supposed, maybe wrongly, that github not doing IPv6 would have been a 
reason of concern for Microsoft after having acquired github, Microsoft 
who _was_ on topic to talk on v6ops about IPv6 in the office.

I will stop here.

Alex

> 
> 
> 
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
> 


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I think this is extremely useful work.  Some additional thoughts:

* Container systems (eg, Docker) are an important illustrative use-case
here worth mentioning in addition to VMs.
  For example, see the Docker IPv6 implementation notes describe something
very similar to
  what we are describing here:
     https://docs.docker.com/v17.09/engine/userguide/
networking/default_network/ipv6/
  It assumes each Docker server has its own prefix (eg, at least /80 but
many of the examples are /64)
  that it assigns to containers out of.  They give two examples, one for ND
proxying
  and one for next-hop routing.  The lack of PD-host model support in cloud
service providers
  such as AWS makes it much harder to deploy IPv6 and Docker on something
like AWS
  without resorting to horrible NAT66 hacks.

* Another good illustrative use-case example might be implementing a NAT64
or similar service.

* Perhaps talk more (in the introduction, if not elsewhere?) about what
addresses get
  used for the next-hop when F is talking to R, in-terms of when it is
using a link-local
  vs global-unicast address on R.  There are likely use-cases for both?

* Section 8 could use some better examples as well as some clarifications
for readability.
  For example, when saying "When a node receives a shared or individual
prefix"
  it should say over what protocol or type of message.
  And for "The node further does not perform the
 IPv6 ND address resolution function over upstream interfaces"
 this should be clarified as for just being for addresses within the
delegated prefix.
 It would also help to clarify which cases the delegated prefixes
 being discussed are for that node or for a node it wishes to talk to.
  (ie, clarify the behavior for a node that shares an upstream
interface/link
  with one or more hosts that have delegated prefixes.)

* For security considerations, some attacks may still be possible through
  on-net hosts.  (eg, if the local network contains an open recursive DNS
resolver
  it could be tricked into making lots of on-upstream ND requests for the
prefix.)
  This may fall into existing ND considerations, but is a corner case where
  the prefix delegation may not help enough?

* Static provisioning plus iBGP next-hop advertisements is another
  provisioning mechanism that I've seen used.   (For example, to assign 256
/64 delegated prefixes
  out of a single statically assigned /56 to route to ND-managed
global-unicast service addresses.
  This has worked well other than being a pain to convince networks that it
is reasonable to support.)

* Is it work mentioning use-cases for "shared delegated prefixes",
  or does that add confusion and should be a topic for a future draft?
  In particular where nodes share a delegated prefix and the first-hop
router F
  load-balances between them, such as via ECMP.  A use-case might be a
NAT64
  or lw4o6 decapsulation service where one prefix is effectively delegated
to a set
  of hosts which each have intentionally duplicate addresses.
  The primary change ends up being with ND.

Best, Erik



On Tue, May 29, 2018 at 3:13 PM, Templin (US), Fred L <
Fred.L.Templin@boeing.com> wrote:

> See below for a draft update to "IPv6 Prefix Delegation Models
> ('draft-templin-v6ops-pdhost').
> This version (-20) updates figure 1 and adds informative text on the
> relation to multi-addressing
> (RFC7934 and RFC8273). Please review and comment.
>
> Fred
>
> -----Original Message-----
> From: I-D-Announce [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> Sent: Tuesday, May 29, 2018 12:02 PM
> To: i-d-announce@ietf.org
> Subject: I-D Action: draft-templin-v6ops-pdhost-20.txt
>
>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>
>
>         Title           : IPv6 Prefix Delegation Models
>         Author          : Fred L. Templin
>         Filename        : draft-templin-v6ops-pdhost-20.txt
>         Pages           : 14
>         Date            : 2018-05-29
>
> Abstract:
>    IPv6 prefixes are typically delegated to requesting routers which
>    assign them to their downstream-attached links and networks.  The
>    requesting node can provision the prefix according to whether it acts
>    as a router on behalf of any downstream networks and/or as a host on
>    behalf of its local applications.  In the latter case, the requesting
>    node can use portions of the delegated prefix for its own multi-
>    addressing purposes.  This document therefore considers prefix
>    delegation models for both the classic routing and multi-addressing
>    use cases.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-templin-v6ops-pdhost/
>
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-templin-v6ops-pdhost-20
> https://datatracker.ietf.org/doc/html/draft-templin-v6ops-pdhost-20
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-templin-v6ops-pdhost-20
>
>
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>

--000000000000d581a8056eb4d4e4
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>I think this is extremely useful work.=C2=A0 Some add=
itional thoughts:</div><div><br></div><div>* Container systems (eg, Docker)=
 are an important illustrative use-case here worth mentioning in addition t=
o VMs.</div><div>=C2=A0 For example, see the Docker IPv6 implementation not=
es describe something very similar to</div><div>=C2=A0 what we are describi=
ng here:</div><div>=C2=A0=C2=A0=C2=A0=C2=A0 <a href=3D"https://docs.docker.=
com/v17.09/engine/userguide/networking/default_network/ipv6/" target=3D"_bl=
ank">https://docs.docker.com/v17.<wbr>09/engine/userguide/<wbr>networking/d=
efault_network/<wbr>ipv6/</a></div><div>=C2=A0 It assumes each Docker serve=
r has its own prefix (eg, at least /80 but many of the examples are /64)</d=
iv><div>=C2=A0 that it assigns to containers out of.=C2=A0 They give two ex=
amples, one for ND proxying</div><div>=C2=A0 and one for next-hop routing.=
=C2=A0 The lack of PD-host model support in cloud service providers</div><d=
iv>=C2=A0 such as AWS makes it much harder to deploy IPv6 and Docker on som=
ething like AWS</div><div>=C2=A0 without resorting to horrible NAT66 hacks.=
<br></div><div><br></div><div>* Another good illustrative use-case example =
might be implementing a NAT64 or similar service.</div><div><br></div><div>=
* Perhaps talk more (in the introduction, if not elsewhere?) about what add=
resses get <br></div><div>=C2=A0 used for the next-hop when F is talking to=
 R, in-terms of when it is using a link-local</div><div>=C2=A0 vs global-un=
icast address on R.=C2=A0 There are likely use-cases for both?<br></div><di=
v><br></div><div>* Section 8 could use some better examples as well as some=
 clarifications for readability.</div><div>=C2=A0 For example, when saying =
&quot;When a node receives a shared or individual prefix&quot;</div><div>=
=C2=A0 it should say over what protocol or type of message.</div><div>=C2=
=A0 And for &quot;The node further does not perform the<br></div><div>=C2=
=A0IPv6 ND address resolution function over upstream interfaces&quot;</div>=
<div>=C2=A0this should be clarified as for just being for addresses within =
the delegated prefix.<br></div><div>=C2=A0It would also help to clarify whi=
ch cases the delegated prefixes</div><div>=C2=A0being discussed are for tha=
t node or for a node it wishes to talk to.<br></div><div>=C2=A0 (ie, clarif=
y the behavior for a node that shares an upstream interface/link</div><div>=
=C2=A0 with one or more hosts that have delegated prefixes.)<br></div><div>=
<br></div><div>* For security considerations, some attacks may still be pos=
sible through</div><div>=C2=A0 on-net hosts.=C2=A0 (eg, if the local networ=
k contains an open recursive DNS resolver</div><div>=C2=A0 it could be tric=
ked into making lots of on-upstream ND requests for the prefix.)</div><div>=
=C2=A0 This may fall into existing ND considerations, but is a corner case =
where</div><div>=C2=A0 the prefix delegation may not help enough?<br></div>=
<div><br></div><div><div>* Static provisioning plus iBGP next-hop advertise=
ments is another <br></div><div>=C2=A0 provisioning mechanism that I&#39;ve=
 seen used.=C2=A0=C2=A0 (For example, to assign 256 /64 delegated prefixes<=
br></div><div>=C2=A0 out of a=20
single statically assigned /56 to route to ND-managed global-unicast servic=
e addresses.</div><div>=C2=A0 This has worked well other than being a pain =
to convince networks that it is reasonable to=20
support.)<br></div><div><br></div><div>* Is it work mentioning use-cases fo=
r &quot;shared delegated prefixes&quot;, <br></div><div>=C2=A0 or does that=
 add confusion and should be a topic for a future draft?</div><div>=C2=A0 I=
n particular where nodes share a delegated prefix and the first-hop router =
F <br></div><div>=C2=A0 load-balances between them, such as via ECMP.=C2=A0=
 A use-case might be a NAT64 <br></div><div>=C2=A0 or lw4o6 decapsulation s=
ervice where one prefix is effectively delegated to a set <br></div><div>=
=C2=A0 of hosts which each have intentionally duplicate addresses.<br></div=
></div><div>=C2=A0 The primary change ends up being with ND.</div><div><br>=
</div><div>Best, Erik</div><div><br></div><div><br></div></div><div class=
=3D"gmail_extra"><br><div class=3D"gmail_quote">On Tue, May 29, 2018 at 3:1=
3 PM, Templin (US), Fred L <span dir=3D"ltr">&lt;<a href=3D"mailto:Fred.L.T=
emplin@boeing.com" target=3D"_blank">Fred.L.Templin@boeing.com</a>&gt;</spa=
n> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;b=
order-left:1px #ccc solid;padding-left:1ex">See below for a draft update to=
 &quot;IPv6 Prefix Delegation Models (&#39;draft-templin-v6ops-pdhost&#39;)=
<wbr>.<br>
This version (-20) updates figure 1 and adds informative text on the relati=
on to multi-addressing<br>
(RFC7934 and RFC8273). Please review and comment.<br>
<br>
Fred<br>
<br>
-----Original Message-----<br>
From: I-D-Announce [mailto:<a href=3D"mailto:i-d-announce-bounces@ietf.org"=
>i-d-announce-bounces@<wbr>ietf.org</a>] On Behalf Of <a href=3D"mailto:int=
ernet-drafts@ietf.org">internet-drafts@ietf.org</a><br>
Sent: Tuesday, May 29, 2018 12:02 PM<br>
To: <a href=3D"mailto:i-d-announce@ietf.org">i-d-announce@ietf.org</a><br>
Subject: I-D Action: draft-templin-v6ops-pdhost-20.<wbr>txt<br>
<br>
<br>
A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.<br>
<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:=
 IPv6 Prefix Delegation Models<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Author=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 : Fred=
 L. Templin<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-tem=
plin-v6ops-pdhost-20.<wbr>txt<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0:=
 14<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 :=
 2018-05-29<br>
<br>
Abstract:<br>
=C2=A0 =C2=A0IPv6 prefixes are typically delegated to requesting routers wh=
ich<br>
=C2=A0 =C2=A0assign them to their downstream-attached links and networks.=
=C2=A0 The<br>
=C2=A0 =C2=A0requesting node can provision the prefix according to whether =
it acts<br>
=C2=A0 =C2=A0as a router on behalf of any downstream networks and/or as a h=
ost on<br>
=C2=A0 =C2=A0behalf of its local applications.=C2=A0 In the latter case, th=
e requesting<br>
=C2=A0 =C2=A0node can use portions of the delegated prefix for its own mult=
i-<br>
=C2=A0 =C2=A0addressing purposes.=C2=A0 This document therefore considers p=
refix<br>
=C2=A0 =C2=A0delegation models for both the classic routing and multi-addre=
ssing<br>
=C2=A0 =C2=A0use cases.<br>
<br>
<br>
The IETF datatracker status page for this draft is:<br>
<a href=3D"https://datatracker.ietf.org/doc/draft-templin-v6ops-pdhost/" re=
l=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/<wbr>doc/dr=
aft-templin-v6ops-<wbr>pdhost/</a><br>
<br>
There are also htmlized versions available at:<br>
<a href=3D"https://tools.ietf.org/html/draft-templin-v6ops-pdhost-20" rel=
=3D"noreferrer" target=3D"_blank">https://tools.ietf.org/html/<wbr>draft-te=
mplin-v6ops-pdhost-20</a><br>
<a href=3D"https://datatracker.ietf.org/doc/html/draft-templin-v6ops-pdhost=
-20" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.org/<wbr=
>doc/html/draft-templin-v6ops-<wbr>pdhost-20</a><br>
<br>
A diff from the previous version is available at:<br>
<a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-templin-v6ops-pdhost-2=
0" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdiff?<wbr>u=
rl2=3Ddraft-templin-v6ops-<wbr>pdhost-20</a><br>
<br>
<br>
Please note that it may take a couple of minutes from the time of submissio=
n<br>
until the htmlized version and diff are available at <a href=3D"http://tool=
s.ietf.org" rel=3D"noreferrer" target=3D"_blank">tools.ietf.org</a>.<br>
<br>
Internet-Drafts are also available by anonymous FTP at:<br>
<a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=3D"noreferrer" target=
=3D"_blank">ftp://ftp.ietf.org/internet-<wbr>drafts/</a><br>
<br>
______________________________<wbr>_________________<br>
I-D-Announce mailing list<br>
<a href=3D"mailto:I-D-Announce@ietf.org">I-D-Announce@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/i-d-announce
Internet-Draft" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/m=
ailman/<wbr>listinfo/i-d-announce<br>
Internet-Draft</a> directories: <a href=3D"http://www.ietf.org/shadow.html"=
 rel=3D"noreferrer" target=3D"_blank">http://www.ietf.org/shadow.<wbr>html<=
/a><br>
or <a href=3D"ftp://ftp.ietf.org/ietf/1shadow-sites.txt" rel=3D"noreferrer"=
 target=3D"_blank">ftp://ftp.ietf.org/ietf/<wbr>1shadow-sites.txt</a><br>
<br>
<br>
______________________________<wbr>_________________<br>
v6ops mailing list<br>
<a href=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/v6ops</a><br>
</blockquote></div><br></div>

--000000000000d581a8056eb4d4e4--


From nobody Fri Jun 15 23:41:43 2018
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Subject: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IPv6 Operations WG of the IETF.

        Title           : Requirements for IPv6 Customer Edge Routers to Support IPv4 Connectivity as-a-Service
        Authors         : Jordi Palet Martinez
                          Hans M.-H. Liu
                          Masanobu Kawashima
	Filename        : draft-ietf-v6ops-transition-ipv4aas-03.txt
	Pages           : 20
	Date            : 2018-06-15

Abstract:
   This document specifies the IPv4 service continuity requirements for
   an IPv6 Customer Edge (CE) router, either provided by the service
   provider or thru the retail market.

   Specifically, this document extends the "Basic Requirements for IPv6
   Customer Edge Routers" in order to allow the provisioning of IPv6
   transition services for the support of "IPv4 as-a-Service" (IPv4aaS)
   by means of new transition mechanisms.  The document only covers
   transition technologies for delivering IPv4 in IPv6-only access
   networks, commonly called "IPv4 as-a-Service" (IPv4aaS), as required
   in a world where IPv4 addresses are no longer available, so hosts in
   the customer LANs with IPv4-only or IPv6-only applications or
   devices, requiring to communicate with IPv4-only services at the
   Internet, are still able to do so.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas-03
https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-transition-ipv4aas-03

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-v6ops-transition-ipv4aas-03


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

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Hi all,



As indicated a couple of day ago, we have updated this document, so instead=
 of an update of RFC8026 and a new option code, we only need to ask IANA to=
 use a NAT64 existing one for the RFC8026 priority table.



https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/?inclu=
de_text=3D1



Let's know any comments you have.



Thanks!



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de <internet-drafts@ietf.org>

Fecha: s=C3=A1bado, 16 de junio de 2018, 8:43

Para: <i-d-announce@ietf.org>

CC: <v6ops@ietf.org>

Asunto: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt



   =20

    A New Internet-Draft is available from the on-line Internet-Drafts dire=
ctories.

    This draft is a work item of the IPv6 Operations WG of the IETF.

   =20

            Title           : Requirements for IPv6 Customer Edge Routers t=
o Support IPv4 Connectivity as-a-Service

            Authors         : Jordi Palet Martinez

                              Hans M.-H. Liu

                              Masanobu Kawashima

    	Filename        : draft-ietf-v6ops-transition-ipv4aas-03.txt

    	Pages           : 20

    	Date            : 2018-06-15

   =20

    Abstract:

       This document specifies the IPv4 service continuity requirements for

       an IPv6 Customer Edge (CE) router, either provided by the service

       provider or thru the retail market.

   =20

       Specifically, this document extends the "Basic Requirements for IPv6

       Customer Edge Routers" in order to allow the provisioning of IPv6

       transition services for the support of "IPv4 as-a-Service" (IPv4aaS)

       by means of new transition mechanisms.  The document only covers

       transition technologies for delivering IPv4 in IPv6-only access

       networks, commonly called "IPv4 as-a-Service" (IPv4aaS), as required

       in a world where IPv4 addresses are no longer available, so hosts in

       the customer LANs with IPv4-only or IPv6-only applications or

       devices, requiring to communicate with IPv4-only services at the

       Internet, are still able to do so.

   =20

   =20

    The IETF datatracker status page for this draft is:

    https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/

   =20

    There are also htmlized versions available at:

    https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas-03

    https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-transition-ipv4a=
as-03

   =20

    A diff from the previous version is available at:

    https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-v6ops-transition-ipv4aas=
-03

   =20

   =20

    Please note that it may take a couple of minutes from the time of submi=
ssion

    until the htmlized version and diff are available at tools.ietf.org.

   =20

    Internet-Drafts are also available by anonymous FTP at:

    ftp://ftp.ietf.org/internet-drafts/

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




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From nobody Mon Jun 18 01:30:51 2018
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Subject: [v6ops] I-D Action: draft-ietf-v6ops-conditional-ras-05.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IPv6 Operations WG of the IETF.

        Title           : Using Conditional Router Advertisements for Enterprise Multihoming
        Authors         : Jen Linkova
                          Massimiliano Stucchi
	Filename        : draft-ietf-v6ops-conditional-ras-05.txt
	Pages           : 18
	Date            : 2018-06-18

Abstract:
   This document discusses the most common scenarios of connecting an
   enterprise network to multiple ISPs using an address space assigned
   by an ISP.  The problem of enterprise multihoming without address
   translation of any form has not been solved yet as it requires both
   the network to select the correct egress ISP based on the packet
   source address and hosts to select the correct source address based
   on the desired egress ISP for that traffic.  The "ietf-rtgwg-
   enterprise-pa-multihoming" document proposes a solution to this
   problem by introducing a new routing functionality (Source Address
   Dependent Routing) to solve the uplink selection issue and using
   Router Advertisements to influence the host source address selection.
   While the above-mentioned document focuses on solving the general
   problem and on covering various complex use cases, this document
   adopts the approach proposed in the "ietf-rtgwg-enterprise-pa-
   multihoming" draft to provide a solution for a limited number of
   common use cases.  In particular, the focus is on scenarios where an
   enterprise network has two Internet uplinks used either in primary/
   backup mode or simultaneously and hosts in that network might not yet
   properly support multihoming as described in RFC8028.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-v6ops-conditional-ras/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-v6ops-conditional-ras-05
https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-conditional-ras-05

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-v6ops-conditional-ras-05


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Mon Jun 18 01:38:13 2018
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From: Jen Linkova <furry13@gmail.com>
Date: Mon, 18 Jun 2018 18:37:44 +1000
Message-ID: <CAFU7BAQbee9owdz_oN2uXvX1hKY0j5jbRmpH8QeWQrhHuuqDkw@mail.gmail.com>
To: Ravi Singh <ravis@juniper.net>
Cc: "rtg-ads@ietf.org" <rtg-ads@ietf.org>, "rtg-dir@ietf.org" <rtg-dir@ietf.org>, "v6ops@ietf.org" <v6ops@ietf.org>,  "draft-ietf-v6ops-conditional-ras@ietf.org" <draft-ietf-v6ops-conditional-ras@ietf.org>
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Subject: Re: [v6ops] RtgDir review: draft-ietf-v6ops-conditional-ras
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Hi Ravi,

My apologies for the delay with addressing issues you raised in your review=
!
I've just uploaded -05 version,
https://datatracker.ietf.org/doc/draft-ietf-v6ops-conditional-ras/
please let me know if it still has any issues.

On Tue, May 22, 2018 at 9:25 AM, Ravi Singh <ravis@juniper.net> wrote:
> Document: draft-ietf-v6ops-conditional-ras
> Summary: This document is basically ready for publication, but has nits t=
hat should be considered prior to publication.
>
> Nits:
>    d. Section 3.2.3: typo: quoted section # needs correction.
>           " correct uplink based on the source address as described in Se=
ction 3.2.1."
>            ->
>          "correct uplink based on the source address as described in Sect=
ion 3.1.1."

The reference was actually correct, I've updated the wording to make
it more clear.

> 4. Section 3.3 & 3.4: the text seems to indicate that this draft if propo=
sing some solution, even though as indicated in this draft's abstract=E2=80=
=A6.the solution being referenced is in ietf-rtgwg-enterprise-pa-multihomin=
g and this draft if describing the use of that solution in sample scenarios=
. Slight rewording of text should help to address this.

I've updated the abstract and the Introduction section to clarify that
this draft  provides a solution based on the general approach
discussed in ietf-rtgwg-enterprise-pa-multihoming.

--=20
SY, Jen Linkova aka Furry


From nobody Mon Jun 18 01:48:01 2018
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From: Jen Linkova <furry13@gmail.com>
Date: Mon, 18 Jun 2018 18:47:23 +1000
Message-ID: <CAFU7BARE6ud0io_5SSA670z6B=cqHJ3=SEqYHd+r7pzArTbGkg@mail.gmail.com>
To: Sheng Jiang <jiangsheng@huawei.com>
Cc: ops-dir@ietf.org, draft-ietf-v6ops-conditional-ras.all@ietf.org,  V6 Ops List <v6ops@ietf.org>, IETF Rinse Repeat <ietf@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/hhAyx08nUMsU8QYV5JSUNLgSi0k>
Subject: Re: [v6ops] Opsdir last call review of draft-ietf-v6ops-conditional-ras-04
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Hi Sheng,

On Mon, May 21, 2018 at 6:23 PM, Sheng Jiang <jiangsheng@huawei.com> wrote:
> Review result: Has Issues
> Minor issue: There are many unused reference. However, they are not simple Nits
> and cannot be fixed by deleting them from reference list. Many of these unused
> reference are really relevant and should have some content to describe the
> relationship with the mechanism or scenario of the document, such as RFC6296
> NAT66, etc.

I've checked all unused references and added most of them to the draft
text. However some of them had to be removed as they are more relevant
to the general multihoming discussion and other potential solutions to
that problem, which are discussed in the
https://tools.ietf.org/html/draft-ietf-rtgwg-enterprise-pa-multihoming
(see Section 7 of that doc). Using SLAAC vs NAT etc is discussed in
details there.

As draft-ietf-v6ops-conditional-ras is more about applying the
approach defined in draft-ietf-rtgwg-enterprise-pa-multihoming to the
particular subset of use cases, it seems unnecessary to have the same
text in both documents, especially as draft-ietf-v6ops-conditional-ras
explicitly refers to draft-ietf-rtgwg-enterprise-pa-multihoming for
details explanation why the particular mechanism is proposed.

Please let me know if the updated version does not address your concerns!

Thank you!

-- 
SY, Jen Linkova aka Furry


From nobody Mon Jun 18 03:57:21 2018
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From: Lee Howard <lee@asgard.org>
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Subject: Re: [v6ops] Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Apparently I'm a week late on this thread. Sorry.

I think an internet-draft in this case would be useful for reflecting 
the current best knowledge about the technologies. Even if it takes two 
years or more to publish, a draft is useful to collect  and summarize 
the detailed academic papers being published, and the structure of 
writing the draft will help point out areas where further research is 
needed.

I'm also interested in supporting this work, up to and including working 
with your students,  providing my own test results, and/or co-authoring.

Lee


On 06/15/2018 10:04 AM, JORDI PALET MARTINEZ wrote:
>
> I’m not sure it makes sense something that is not published in, let’s 
> say, maximum one year from now.
>
> Anyway, I’m happy to help.
>
> By the way, I got some private questions about this … The table that 
> I’ve posted yesterday, was developed about 3 years ago, and I’ve not 
> updated it since them. Actually from emails exchanged today, I 
> discovered a couple of mistakes and also things that can be improved, 
> so if needed I can update it as well.
>
>
> Regards,
>
> Jordi
>
> *De: *v6ops <v6ops-bounces@ietf.org> en nombre de Lencse Gábor 
> <lencse@hit.bme.hu>
> *Fecha: *viernes, 15 de junio de 2018, 14:25
> *Para: *Fred Baker <fredbaker.ietf@gmail.com>
> *CC: *<v6ops@ietf.org>
> *Asunto: *[v6ops] Pros and Cons of IPv6 Transition Technologies for 
> IPv4aaS -- Re: no need to update RFC8026 in 
> draft-ietf-v6ops-transition-ipv4aas
>
> Dear Fred,
>
> Thank you very much for your invitation. I am willing to accept it, 
> but I would like to clarify your expectations before saying 'yes'.
>
> I have several questions.
>
> 1. Depth of the analysis
>
> - Basic level: well-known advantages and disadvantages, similarly as 
> people wrote about MAP-T/E and 464XLAT, but also about DS-Lite and lw4o6.
> - Advanced level: basic level + security analysis using the 
> methodology defined in [1] + performance analysis according to RFC 8219.
>
> What depth do you recommend?
>
> 2. Method for getting the results and their publication
>
> As for the information for the basic level, I would prepare a google 
> docs table, fill in the information I have and send the link to the 
> v6ops list asking contributions.
> After commenting and discussing, I would compile it to an I-D.
>
> Do you think that v6ops WG would finally agree to publish it as an RFC?
>
> As for the information for the advanced level, I would work together 
> with my students and PhD students, and publish our results first in 
> academic papers and then include their most important lessons into the 
> I-D.
>
> What do you think of it?
>
> 3. Timeline
>
> I think that I could put together the first table in a few weeks. The 
> contribution of the v6ops list members and the discussion could be 
> done in a few months and then I could compile the results into an I-D 
> in a few weeks. Perhaps, it could be presented at IETF 103.
>
> The further parts would require much more time and results could be 
> included gradually in 1-2 years.
>
> 4. Scope
>
> The smallest natural scope includes the technologies for IPv4AAS, that 
> is: 464XLAT, DS-Lite, MAP-T/E and lw4o6.
>
> IPv6 transition technologies for other carefully selected scenarios 
> might also be included. E.g. I have significant amount of results in 
> benchmarking DNS64 servers, having a testing tool [2], a well defined 
> methodology [3] and ready to use results concerning the DNS64 
> performance of BIND, PowerDNS and Unbound [4].
> One of my PhD students is currently benchmarking some sateless NAT64 
> implementations according the the dual DUT setup of RFC 8219 using an 
> RFC 2544 compatible Tester. Another PhD student is currently working 
> on a RFC 8219 compliant NAT64 tester program (using DPDK) to be able 
> to perform single DUT setup NAT64 benchmarking tests.
>
> Thus, the scope can be widened, if you would like to.
>
> What do you think about my recommendations?
>
> Best regards,
>
> Gábor
>
> References:
>
> [1] G. Lencse and Y. Kadobayashi, "Methodology for the identification 
> of potential security issues of different IPv6 transition 
> technologies: Threat analysis of DNS64 and stateful NAT64", /Computers 
> & Security/ (Elsevier), vol. 77, no. 1, pp. 397-411, August 1, 2018, 
> DOI: 10.1016/j.cose.2018.04.012
>
> [2] G. Lencse, D. Bakai, "Design and implementation of a test program 
> for benchmarking DNS64 servers", /IEICE Transactions on 
> Communications/, vol. E100-B, no. 6. pp. 948-954, June 2017. DOI: 
> 10.1587/transcom.2016EBN0007
>
> [3] G. Lencse, M. Georgescu, and Y. Kadobayashi, "Benchmarking 
> Methodology for DNS64 Servers", /Computer Communications/ (Elsevier), 
> vol. 109, no. 1, pp. 162-175, September 1, 2017, DOI: 
> 10.1016/j.comcom.2017.06.004
>
> [4] G. Lencse and Y. Kadobayashi, "Benchmarking DNS64 Implementations: 
> Theory and Practice", /Computer Communications/ (Elsevier), vol. 127, 
> no. 1, pp. 61-74, September 1, 2018, DOI: 10.1016/j.comcom.2018.05.005
>
> 6/14/2018 10:42 PM keltezéssel, Fred Baker írta:
>
>     On Jun 14, 2018, at 1:15 PM, Lencse Gábor<lencse@hit.bme.hu> <mailto:lencse@hit.bme.hu>  wrote:
>
>         I have an idea: perhaps you could add a section about the pros and cons of each transition technology covered by the draft. (It could be helpful for the network operators when selecting the technology matching their need the best. However, I am not sure whether it is in the scope of this draft.)
>
>     It would be incredibly useful. That said, it often involves value judgements, which are essentially in the eye of the beholder.
>
>     We have had a recent thread regarding 464xlat and MAP-T. If I can say this without actually putting words into Lorenzo's mouth, his issues with translation in general are probably summarized in RFC 2993, and I would agree with him. The distinction between 464xlat and MAP-T you'll have to find in his emails; they are both services an ISP might deploy, and while they use the same tool (translation) they are not the same service. It seems to be generally agreed that MAP-T is more expensive to deploy than 464xlat; the question is what the extra expense buys, and whether someone agrees that the result is worth the cost.
>
>     So in your proposed section, I would have to ask Jordi to not only say "MAP-T costs more to deploy than 464xlat", but gives the argument that might lead someone to choose MAP-T.
>
>     And then we get to the large variety of other technologies, some of which presume an IPv4 core network and some an IPv6 core network (and none of which assume an MPLS core network carrying both kinds of traffic).
>
>     If you would like to write such a document, please be my guest, by all means. But I'm not going to expect Jordi to do all that in the coming two weeks...
>
>
> _______________________________________________ v6ops mailing list 
> v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>
>
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>
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    <p>Apparently I'm a week late on this thread. Sorry.</p>
    <p>I think an internet-draft in this case would be useful for
      reflecting the current best knowledge about the technologies. Even
      if it takes two years or more to publish, a draft is useful to
      collect  and summarize the detailed academic papers being
      published, and the structure of writing the draft will help point
      out areas where further research is needed.</p>
    <p>I'm also interested in supporting this work, up to and including
      working with your students,  providing my own test results, and/or
      co-authoring.<br>
    </p>
    <p>Lee<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 06/15/2018 10:04 AM, JORDI PALET
      MARTINEZ wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:1BFAD96D-F06E-4EBF-8751-761EF08E6EE0@consulintel.es">
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        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US">I’m not sure it makes sense something that is
            not published in, let’s say, maximum one year from now.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US">Anyway, I’m happy to help.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="EN-US">By the way, I got some private questions about
            this … The table that I’ve posted yesterday, was developed
            about 3 years ago, and I’ve not updated it since them.
            Actually from emails exchanged today, I discovered a couple
            of mistakes and also things that can be improved, so if
            needed I can update it as well.<o:p></o:p></span></p>
        <div>
          <p class="MsoNormal"><span
              style="font-size:10.5pt;color:black" lang="EN-US"><br>
            </span><span style="font-size:10.5pt;color:black"
              lang="ES-TRAD">Regards,<o:p></o:p></span></p>
          <p class="MsoNormal" style="margin-bottom:12.0pt"><span
              style="font-size:10.5pt;color:black;mso-fareast-language:EN-US"
              lang="ES-TRAD">Jordi<o:p></o:p></span></p>
          <p class="MsoNormal" style="margin-bottom:12.0pt"><span
              style="font-size:10.5pt;color:black;mso-fareast-language:EN-US"
              lang="ES-TRAD"><o:p> </o:p></span></p>
        </div>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="ES-TRAD"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
            lang="ES-TRAD"><o:p> </o:p></span></p>
        <div style="border:none;border-top:solid #B5C4DF
          1.0pt;padding:3.0pt 0cm 0cm 0cm">
          <p class="MsoNormal" style="margin-left:35.4pt"><b><span
                style="font-size:12.0pt;color:black">De: </span></b><span
              style="font-size:12.0pt;color:black">v6ops
              <a class="moz-txt-link-rfc2396E" href="mailto:v6ops-bounces@ietf.org">&lt;v6ops-bounces@ietf.org&gt;</a> en nombre de Lencse Gábor
              <a class="moz-txt-link-rfc2396E" href="mailto:lencse@hit.bme.hu">&lt;lencse@hit.bme.hu&gt;</a><br>
              <b>Fecha: </b>viernes, 15 de junio de 2018, 14:25<br>
              <b>Para: </b>Fred Baker <a class="moz-txt-link-rfc2396E" href="mailto:fredbaker.ietf@gmail.com">&lt;fredbaker.ietf@gmail.com&gt;</a><br>
              <b>CC: </b><a class="moz-txt-link-rfc2396E" href="mailto:v6ops@ietf.org">&lt;v6ops@ietf.org&gt;</a><br>
              <b>Asunto: </b>[v6ops] Pros and Cons of IPv6 Transition
              Technologies for IPv4aaS -- Re: no need to update RFC8026
              in draft-ietf-v6ops-transition-ipv4aas<o:p></o:p></span></p>
        </div>
        <div>
          <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
        </div>
        <p class="MsoNormal"
style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt">Dear
          Fred,<br>
          <br>
          Thank you very much for your invitation. I am willing to
          accept it, but I would like to clarify your expectations
          before saying 'yes'.<br>
          <br>
          I have several questions.<br>
          <br>
          1. Depth of the analysis<br>
          <br>
          - Basic level: well-known advantages and disadvantages,
          similarly as people wrote about MAP-T/E and 464XLAT, but also
          about DS-Lite and lw4o6.<br>
          - Advanced level: basic level + security analysis using the
          methodology defined in [1] + performance analysis according to
          RFC 8219.<br>
          <br>
          What depth do you recommend?<br>
          <br>
          2. Method for getting the results and their publication<br>
          <br>
          As for the information for the basic level, I would prepare a
          google docs table, fill in the information I have and send the
          link to the v6ops list asking contributions.<br>
          After commenting and discussing, I would compile it to an I-D.
          <br>
          <br>
          Do you think that v6ops WG would finally agree to publish it
          as an RFC?<br>
          <br>
          As for the information for the advanced level, I would work
          together with my students and PhD students, and publish our
          results first in academic papers and then include their most
          important lessons into the I-D.<br>
          <br>
          What do you think of it?<br>
          <br>
          3. Timeline<br>
          <br>
          I think that I could put together the first table in a few
          weeks. The contribution of the v6ops list members and the
          discussion could be done in a few months and then I could
          compile the results into an I-D in a few weeks. Perhaps, it
          could be presented at IETF 103.<br>
          <br>
          The further parts would require much more time and results
          could be included gradually in 1-2 years.<br>
          <br>
          4. Scope<br>
          <br>
          The smallest natural scope includes the technologies for
          IPv4AAS, that is: 464XLAT, DS-Lite, MAP-T/E and lw4o6.<br>
          <br>
          IPv6 transition technologies for other carefully selected
          scenarios might also be included. E.g. I have significant
          amount of results in benchmarking DNS64 servers, having a
          testing tool [2], a well defined methodology [3] and ready to
          use results concerning the DNS64 performance of BIND, PowerDNS
          and Unbound [4]. <br>
          One of my PhD students is currently benchmarking some sateless
          NAT64 implementations according the the dual DUT setup of RFC
          8219 using an RFC 2544 compatible Tester. Another PhD student
          is currently working on a RFC 8219 compliant NAT64 tester
          program (using DPDK) to be able to perform single DUT setup
          NAT64 benchmarking tests. <br>
          <br>
          Thus, the scope can be widened, if you would like to.<br>
          <br>
          What do you think about my recommendations?<br>
          <br>
          Best regards,<br>
          <br>
          Gábor<br>
          <br>
          References:<br>
          <br>
          [1] G. Lencse and Y. Kadobayashi, "Methodology for the
          identification of potential security issues of different IPv6
          transition technologies: Threat analysis of DNS64 and stateful
          NAT64", <i>Computers &amp; Security</i> (Elsevier), vol. 77,
          no. 1, pp. 397-411, August 1, 2018, DOI:
          10.1016/j.cose.2018.04.012<br>
          <br>
          [2] G. Lencse, D. Bakai, "Design and implementation of a test
          program for benchmarking DNS64 servers", <i>IEICE
            Transactions on Communications</i>, vol. E100-B, no. 6. pp.
          948-954, June 2017. DOI: 10.1587/transcom.2016EBN0007<br>
          <br>
          [3] G. Lencse, M. Georgescu, and Y. Kadobayashi, "Benchmarking
          Methodology for DNS64 Servers", <i>Computer Communications</i>
          (Elsevier), vol. 109, no. 1, pp. 162-175, September 1, 2017,
          DOI: 10.1016/j.comcom.2017.06.004<br>
          <br>
          [4] G. Lencse and Y. Kadobayashi, "Benchmarking DNS64
          Implementations: Theory and Practice", <i>Computer
            Communications</i> (Elsevier), vol. 127, no. 1, pp. 61-74,
          September 1, 2018, DOI: 10.1016/j.comcom.2018.05.005<br>
          <br>
          <o:p></o:p></p>
        <div>
          <p class="MsoNormal" style="margin-left:35.4pt">6/14/2018
            10:42 PM keltezéssel, Fred Baker írta:<o:p></o:p></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <pre style="margin-left:35.4pt"><o:p> </o:p></pre>
          <pre style="margin-left:35.4pt">On Jun 14, 2018, at 1:15 PM, Lencse Gábor <a href="mailto:lencse@hit.bme.hu" moz-do-not-send="true">&lt;lencse@hit.bme.hu&gt;</a> wrote:<o:p></o:p></pre>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <pre style="margin-left:35.4pt">I have an idea: perhaps you could add a section about the pros and cons of each transition technology covered by the draft. (It could be helpful for the network operators when selecting the technology matching their need the best. However, I am not sure whether it is in the scope of this draft.)<o:p></o:p></pre>
          </blockquote>
          <pre style="margin-left:35.4pt">It would be incredibly useful. That said, it often involves value judgements, which are essentially in the eye of the beholder.<o:p></o:p></pre>
          <pre style="margin-left:35.4pt"><o:p> </o:p></pre>
          <pre style="margin-left:35.4pt">We have had a recent thread regarding 464xlat and MAP-T. If I can say this without actually putting words into Lorenzo's mouth, his issues with translation in general are probably summarized in RFC 2993, and I would agree with him. The distinction between 464xlat and MAP-T you'll have to find in his emails; they are both services an ISP might deploy, and while they use the same tool (translation) they are not the same service. It seems to be generally agreed that MAP-T is more expensive to deploy than 464xlat; the question is what the extra expense buys, and whether someone agrees that the result is worth the cost.<o:p></o:p></pre>
          <pre style="margin-left:35.4pt"><o:p> </o:p></pre>
          <pre style="margin-left:35.4pt">So in your proposed section, I would have to ask Jordi to not only say "MAP-T costs more to deploy than 464xlat", but gives the argument that might lead someone to choose MAP-T.<o:p></o:p></pre>
          <pre style="margin-left:35.4pt"><o:p> </o:p></pre>
          <pre style="margin-left:35.4pt">And then we get to the large variety of other technologies, some of which presume an IPv4 core network and some an IPv6 core network (and none of which assume an MPLS core network carrying both kinds of traffic).<o:p></o:p></pre>
          <pre style="margin-left:35.4pt"><o:p> </o:p></pre>
          <pre style="margin-left:35.4pt">If you would like to write such a document, please be my guest, by all means. But I'm not going to expect Jordi to do all that in the coming two weeks...<o:p></o:p></pre>
        </blockquote>
        <p class="MsoNormal" style="margin-left:35.4pt"><br>
          _______________________________________________ v6ops mailing
          list <a class="moz-txt-link-abbreviated" href="mailto:v6ops@ietf.org">v6ops@ietf.org</a>
          <a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mailman/listinfo/v6ops</a> <o:p></o:p></p>
      </div>
      <br>
      **********************************************<br>
      IPv4 is over<br>
      Are you ready for the new Internet ?<br>
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      The IPv6 Company<br>
      <br>
      This electronic message contains information which may be
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      <br>
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</pre>
    </blockquote>
    <br>
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt
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Hi Med,



Thanks a lot for your inputs.



I've few comments:

1) The requirements language is the same as it was used in RFC7084. We beli=
eve it makes a lot of sense to follow that.



2) Some of the comments are related to the usage of expressions such as ser=
vices vs servers, transition vs service continuity, etc. The authors consid=
er that it is good to use those interchangeable wordings, because for examp=
le, if we don't mention transition, a reader may be confused understanding =
that this is not regarding transition but a new problem "service continuity=
". Anyway, we will take a look again into this, and also seek for other com=
ments from the WG.=20



3) Will clarify anything that doesn't parse easily from your inputs.



4) You're right regarding the numbering of new General and LAN requirements=
, there is no reason now to follow the numbering of RFC7084, we will start =
from 1.



5) We believe that it makes sense that in the DEFAULT config, according wit=
h the discussion in the list, transition is disabled, so we avoid possible =
conflicts, unless the ISP turns it on (following RFC8026) or the user (by m=
eans of GUI or CLI).



6) The code considerations section was requested in v6ops to be keep as par=
t of the document, not an annex. We are happy to change that again if that'=
s the WG decision.



We will wait a few extra days for any further inputs before submitting a ne=
w version (before the cut-off).



Thanks !



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de <mohamed.boucadair@orange.c=
om>

Fecha: lunes, 18 de junio de 2018, 14:27

Para: JORDI PALET MARTINEZ <jordi.palet=3D40consulintel.es@dmarc.ietf.org>

CC: "v6ops@ietf.org" <v6ops@ietf.org>

Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt



    Hi Jordi,=20

   =20

    FWIW, please find some comments to this draft at:=20

   =20

    pdf: https://github.com/boucadair/IETF-Drafts-Reviews/blob/master/draft=
-ietf-v6ops-transition-ipv4aas-03-rev%20Med.pdf=20

    doc: https://github.com/boucadair/IETF-Drafts-Reviews/raw/master/draft-=
ietf-v6ops-transition-ipv4aas-03-rev%20Med.doc=20

   =20

    Cheers,

    Med

   =20

    > -----Message d'origine-----

    > De : v6ops [mailto:v6ops-bounces@ietf.org] De la part de JORDI PALET =
MARTINEZ

    > Envoy=C3=A9 : samedi 16 juin 2018 08:57

    > =C3=80 : v6ops@ietf.org

    > Objet : Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-0=
3.txt

    >=20

    > Hi all,

    >=20

    >=20

    >=20

    > As indicated a couple of day ago, we have updated this document, so i=
nstead

    > of an update of RFC8026 and a new option code, we only need to ask IA=
NA to

    > use a NAT64 existing one for the RFC8026 priority table.

    >=20

    >=20

    >=20

    > https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-

    > ipv4aas/?include_text=3D1

    >=20

    >=20

    >=20

    > Let's know any comments you have.

    >=20

    >=20

    >=20

    > Thanks!

    >=20

    >=20

    >=20

    > Regards,

    >=20

    > Jordi

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    > =EF=BB=BF-----Mensaje original-----

    >=20

    > De: v6ops <v6ops-bounces@ietf.org> en nombre de <internet-drafts@ietf=
.org>

    >=20

    > Fecha: s=C3=A1bado, 16 de junio de 2018, 8:43

    >=20

    > Para: <i-d-announce@ietf.org>

    >=20

    > CC: <v6ops@ietf.org>

    >=20

    > Asunto: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.tx=
t

    >=20

    >=20

    >=20

    >=20

    >=20

    >     A New Internet-Draft is available from the on-line Internet-Draft=
s

    > directories.

    >=20

    >     This draft is a work item of the IPv6 Operations WG of the IETF.

    >=20

    >=20

    >=20

    >             Title           : Requirements for IPv6 Customer Edge Rou=
ters to

    > Support IPv4 Connectivity as-a-Service

    >=20

    >             Authors         : Jordi Palet Martinez

    >=20

    >                               Hans M.-H. Liu

    >=20

    >                               Masanobu Kawashima

    >=20

    >     	Filename        : draft-ietf-v6ops-transition-ipv4aas-03.txt

    >=20

    >     	Pages           : 20

    >=20

    >     	Date            : 2018-06-15

    >=20

    >=20

    >=20

    >     Abstract:

    >=20

    >        This document specifies the IPv4 service continuity requiremen=
ts for

    >=20

    >        an IPv6 Customer Edge (CE) router, either provided by the serv=
ice

    >=20

    >        provider or thru the retail market.

    >=20

    >=20

    >=20

    >        Specifically, this document extends the "Basic Requirements fo=
r IPv6

    >=20

    >        Customer Edge Routers" in order to allow the provisioning of I=
Pv6

    >=20

    >        transition services for the support of "IPv4 as-a-Service" (IP=
v4aaS)

    >=20

    >        by means of new transition mechanisms.  The document only cove=
rs

    >=20

    >        transition technologies for delivering IPv4 in IPv6-only acces=
s

    >=20

    >        networks, commonly called "IPv4 as-a-Service" (IPv4aaS), as re=
quired

    >=20

    >        in a world where IPv4 addresses are no longer available, so ho=
sts in

    >=20

    >        the customer LANs with IPv4-only or IPv6-only applications or

    >=20

    >        devices, requiring to communicate with IPv4-only services at t=
he

    >=20

    >        Internet, are still able to do so.

    >=20

    >=20

    >=20

    >=20

    >=20

    >     The IETF datatracker status page for this draft is:

    >=20

    >     https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4=
aas/

    >=20

    >=20

    >=20

    >     There are also htmlized versions available at:

    >=20

    >     https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas-0=
3

    >=20

    >     https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-transition=
-

    > ipv4aas-03

    >=20

    >=20

    >=20

    >     A diff from the previous version is available at:

    >=20

    >     https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-v6ops-transition-i=
pv4aas-03

    >=20

    >=20

    >=20

    >=20

    >=20

    >     Please note that it may take a couple of minutes from the time of

    > submission

    >=20

    >     until the htmlized version and diff are available at tools.ietf.o=
rg.

    >=20

    >=20

    >=20

    >     Internet-Drafts are also available by anonymous FTP at:

    >=20

    >     ftp://ftp.ietf.org/internet-drafts/

    >=20

    >=20

    >=20

    >     _______________________________________________

    >=20

    >     v6ops mailing list

    >=20

    >     v6ops@ietf.org

    >=20

    >     https://www.ietf.org/mailman/listinfo/v6ops

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    > **********************************************

    > IPv4 is over

    > Are you ready for the new Internet ?

    > http://www.consulintel.es

    > The IPv6 Company

    >=20

    > This electronic message contains information which may be privileged =
or

    > confidential. The information is intended to be for the exclusive use=
 of the

    > individual(s) named above and further non-explicilty authorized discl=
osure,

    > copying, distribution or use of the contents of this information, eve=
n if

    > partially, including attached files, is strictly prohibited and will =
be

    > considered a criminal offense. If you are not the intended recipient =
be aware

    > that any disclosure, copying, distribution or use of the contents of =
this

    > information, even if partially, including attached files, is strictly

    > prohibited, will be considered a criminal offense, so you must reply =
to the

    > original sender to inform about this communication and delete it.

    >=20

    >=20

    >=20

    > _______________________________________________

    > v6ops mailing list

    > v6ops@ietf.org

    > https://www.ietf.org/mailman/listinfo/v6ops

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




**********************************************
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Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
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copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
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formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Erik Nygren <erik+ietf@nygren.org>
CC: v6ops list <v6ops@ietf.org>
Thread-Topic: [v6ops] IPv6 Prefix Delegation Models ('draft-templin-v6ops-pdhost') - draft update
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Subject: Re: [v6ops] IPv6 Prefix Delegation Models ('draft-templin-v6ops-pdhost') - draft update
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Hi, responses inline.

> On Tue, Jun 12, 2018 at 11:16 PM Mark Andrews <marka@isc.org =
<mailto:marka@isc.org>> wrote:
>=20
> This does not meet my requirements. There is zero need for any part of =
the normal DNS resolution
> process to know the IPV4ONLY.ARPA is special if IANA stopped signing =
the zone.

Could you take a look at draft-cheshire-sudn-ipv4only-dot-arpa please? =
It explains why some parts of the DNS resolution process do need to =
treat ipv4only.arpa as special, regardless of DNSSEC.

> On Jun 13, 2018, at 19:19, Warren Kumari <warren@kumari.net> wrote:
>=20
> I read that a few times, and even when squinting I cannot figure out =
how that is supposed to work. Can someone enlighten me? I can see how a =
signed ipv4only.arpa allows a validating DNS64 server to validate the =
(well known!) v4 addresses, but the malicious AAAA RR detection bit =
confuses me...

I agree, there is no point in signing the A records for ipv4only.arpa =
since they are well-known, and for the same reason there is no point in =
checking it. So having A records signed or unsigned is irrelevant since =
no one should be querying for these A records anyway. Similarly, since =
the whole purpose of the AAAA records for ipv4only.arpa is to be =
overridden by a DNS64 recursive resolver which is not owned by .arpa, =
checking signatures will not validate anything useful.

I agree with Mark's point that queries will fail when the client is =
behind a validating resolver that has no special knowledge of =
ipv4only.arpa.

To resolve this, we'll update draft-cheshire-sudn-ipv4only-dot-arpa to =
mention that ipv4only.arpa MUST NOT be signed.

Thanks,
David=

--Apple-Mail=_3961EC25-55C4-4F55-87D4-ABBC0038EC4C
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
	charset=us-ascii

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><div =
dir=3D"auto" style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
line-break: after-white-space;" class=3D"">Hi, responses inline.<div =
class=3D""><br class=3D""><div><blockquote type=3D"cite" class=3D""><div =
class=3D""><div dir=3D"ltr" class=3D""><div class=3D"gmail_quote"><div =
dir=3D"ltr" class=3D"">On Tue, Jun 12, 2018 at 11:16 PM Mark Andrews =
&lt;<a href=3D"mailto:marka@isc.org" class=3D"">marka@isc.org</a>&gt; =
wrote:</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px =
0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br class=3D"">
This does not meet my requirements. There is zero need for any part of =
the normal DNS =
resolution</blockquote></div></div></div></blockquote><blockquote =
type=3D"cite" class=3D""><div class=3D""><div dir=3D"ltr" class=3D""><div =
class=3D"gmail_quote"><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex">
process to know the IPV4ONLY.ARPA is special if IANA stopped signing the =
zone. </blockquote></div></div></div></blockquote><div><br =
class=3D""></div><div>Could you take a look at =
draft-cheshire-sudn-ipv4only-dot-arpa please? It explains why some parts =
of the DNS resolution process do need to treat ipv4only.arpa as special, =
regardless of DNSSEC.</div><div><br class=3D""></div><blockquote =
type=3D"cite" class=3D"">On Jun 13, 2018, at 19:19, Warren Kumari &lt;<a =
href=3D"mailto:warren@kumari.net" class=3D"">warren@kumari.net</a>&gt; =
wrote:<br class=3D""></blockquote><blockquote type=3D"cite" =
class=3D""><div class=3D""><div dir=3D"ltr" class=3D""><div =
class=3D"gmail_quote"><div class=3D"gmail_default"><font face=3D"verdana, =
sans-serif" class=3D""><br class=3D""></font></div><div =
class=3D"gmail_default"><font face=3D"verdana, sans-serif" class=3D"">I =
read that a few times, and even when squinting&nbsp;I cannot figure out =
how that is supposed to work. Can someone enlighten me? I can see how a =
signed ipv4only.arpa allows a validating DNS64 server to validate the =
(well known!) v4 addresses, but the malicious AAAA RR detection bit =
confuses me...</font></div></div></div></div></blockquote><div><br =
class=3D""></div><div>I agree, there is no point in signing the A =
records for ipv4only.arpa since they are well-known, and for the same =
reason there is no point in checking it. So having A records signed or =
unsigned is irrelevant since no one should be querying for these A =
records anyway. Similarly, since the whole purpose of the AAAA records =
for ipv4only.arpa is to be overridden by a DNS64 recursive resolver =
which is not owned by .arpa, checking signatures will not validate =
anything useful.</div><div><br class=3D""></div><div>I agree with Mark's =
point that queries will fail when the client is behind a validating =
resolver that has no special knowledge of ipv4only.arpa.</div><div><br =
class=3D""></div><div>To resolve this, we'll =
update&nbsp;draft-cheshire-sudn-ipv4only-dot-arpa to mention that =
ipv4only.arpa MUST NOT be signed.</div><div><br =
class=3D""></div></div></div><div class=3D"">Thanks,</div><div =
class=3D"">David</div></div></body></html>=

--Apple-Mail=_3961EC25-55C4-4F55-87D4-ABBC0038EC4C--


From nobody Mon Jun 18 18:36:15 2018
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From: Ted Lemon <mellon@fugue.com>
Date: Mon, 18 Jun 2018 21:35:51 -0400
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To: David Schinazi <dschinazi@apple.com>
Cc: IPv6 Operations <v6ops@ietf.org>, Mark Andrews <marka@isc.org>,  Michelle Cotton via RT <iana-questions@iana.org>, Stuart Cheshire <cheshire@apple.com>,  Warren Kumari <warren@kumari.net>, dnsop <dnsop@ietf.org>
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Subject: Re: [v6ops] [DNSOP] [IANA #989438] ipv4only.arpa's delegation should be insecure.
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--000000000000739aba056ef4b4f7
Content-Type: text/plain; charset="UTF-8"

You should steal the text from the dot home RFC.

On Mon, Jun 18, 2018 at 9:30 PM David Schinazi <dschinazi@apple.com> wrote:

> Hi, responses inline.
>
> On Tue, Jun 12, 2018 at 11:16 PM Mark Andrews <marka@isc.org> wrote:
>
>>
>> This does not meet my requirements. There is zero need for any part of
>> the normal DNS resolution
>
> process to know the IPV4ONLY.ARPA is special if IANA stopped signing the
>> zone.
>
>
> Could you take a look at draft-cheshire-sudn-ipv4only-dot-arpa please? It
> explains why some parts of the DNS resolution process do need to treat
> ipv4only.arpa as special, regardless of DNSSEC.
>
> On Jun 13, 2018, at 19:19, Warren Kumari <warren@kumari.net> wrote:
>
>
> I read that a few times, and even when squinting I cannot figure out how
> that is supposed to work. Can someone enlighten me? I can see how a signed
> ipv4only.arpa allows a validating DNS64 server to validate the (well
> known!) v4 addresses, but the malicious AAAA RR detection bit confuses me...
>
>
> I agree, there is no point in signing the A records for ipv4only.arpa
> since they are well-known, and for the same reason there is no point in
> checking it. So having A records signed or unsigned is irrelevant since no
> one should be querying for these A records anyway. Similarly, since the
> whole purpose of the AAAA records for ipv4only.arpa is to be overridden by
> a DNS64 recursive resolver which is not owned by .arpa, checking signatures
> will not validate anything useful.
>
> I agree with Mark's point that queries will fail when the client is behind
> a validating resolver that has no special knowledge of ipv4only.arpa.
>
> To resolve this, we'll update draft-cheshire-sudn-ipv4only-dot-arpa to
> mention that ipv4only.arpa MUST NOT be signed.
>
> Thanks,
> David
> _______________________________________________
> DNSOP mailing list
> DNSOP@ietf.org
> https://www.ietf.org/mailman/listinfo/dnsop
>

--000000000000739aba056ef4b4f7
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Content-Transfer-Encoding: quoted-printable

<div><div dir=3D"auto">You should steal the text from the dot home RFC.=C2=
=A0</div></div><div><br><div class=3D"gmail_quote"><div>On Mon, Jun 18, 201=
8 at 9:30 PM David Schinazi &lt;<a href=3D"mailto:dschinazi@apple.com">dsch=
inazi@apple.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div=
 style=3D"word-wrap:break-word;line-break:after-white-space"><div dir=3D"au=
to" style=3D"word-wrap:break-word;line-break:after-white-space">Hi, respons=
es inline.<div><br><div><blockquote type=3D"cite"><div><div><div class=3D"g=
mail_quote"></div></div></div></blockquote></div></div></div></div><div sty=
le=3D"word-wrap:break-word;line-break:after-white-space"><div dir=3D"auto" =
style=3D"word-wrap:break-word;line-break:after-white-space"><div><div><bloc=
kquote type=3D"cite"><div><div><div class=3D"gmail_quote"><div>On Tue, Jun =
12, 2018 at 11:16 PM Mark Andrews &lt;<a href=3D"mailto:marka@isc.org" targ=
et=3D"_blank">marka@isc.org</a>&gt; wrote:</div><blockquote class=3D"gmail_=
quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,=
204);padding-left:1ex">
<br>
This does not meet my requirements. There is zero need for any part of the =
normal DNS resolution</blockquote></div></div></div></blockquote></div></di=
v></div></div><div style=3D"word-wrap:break-word;line-break:after-white-spa=
ce"><div dir=3D"auto" style=3D"word-wrap:break-word;line-break:after-white-=
space"><div><div><blockquote type=3D"cite"><div><div><div class=3D"gmail_qu=
ote"><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;bo=
rder-left:1px solid rgb(204,204,204);padding-left:1ex">
process to know the IPV4ONLY.ARPA is special if IANA stopped signing the zo=
ne. </blockquote></div></div></div></blockquote><div><br></div></div></div>=
</div></div><div style=3D"word-wrap:break-word;line-break:after-white-space=
"><div dir=3D"auto" style=3D"word-wrap:break-word;line-break:after-white-sp=
ace"><div><div><div>Could you take a look at draft-cheshire-sudn-ipv4only-d=
ot-arpa please? It explains why some parts of the DNS resolution process do=
 need to treat ipv4only.arpa as special, regardless of DNSSEC.</div></div><=
/div></div></div><div style=3D"word-wrap:break-word;line-break:after-white-=
space"><div dir=3D"auto" style=3D"word-wrap:break-word;line-break:after-whi=
te-space"><div><div><div><br></div><blockquote type=3D"cite">On Jun 13, 201=
8, at 19:19, Warren Kumari &lt;<a href=3D"mailto:warren@kumari.net" target=
=3D"_blank">warren@kumari.net</a>&gt; wrote:<br></blockquote><blockquote ty=
pe=3D"cite"><div><div><div class=3D"gmail_quote"><div class=3D"gmail_defaul=
t"><font face=3D"verdana, sans-serif"><br></font></div><div class=3D"gmail_=
default"><font face=3D"verdana, sans-serif">I read that a few times, and ev=
en when squinting=C2=A0I cannot figure out how that is supposed to work. Ca=
n someone enlighten me? I can see how a signed ipv4only.arpa allows a valid=
ating DNS64 server to validate the (well known!) v4 addresses, but the mali=
cious AAAA RR detection bit confuses me...</font></div></div></div></div></=
blockquote><div><br></div></div></div></div></div><div style=3D"word-wrap:b=
reak-word;line-break:after-white-space"><div dir=3D"auto" style=3D"word-wra=
p:break-word;line-break:after-white-space"><div><div><div>I agree, there is=
 no point in signing the A records for ipv4only.arpa since they are well-kn=
own, and for the same reason there is no point in checking it. So having A =
records signed or unsigned is irrelevant since no one should be querying fo=
r these A records anyway. Similarly, since the whole purpose of the AAAA re=
cords for ipv4only.arpa is to be overridden by a DNS64 recursive resolver w=
hich is not owned by .arpa, checking signatures will not validate anything =
useful.</div><div><br></div><div>I agree with Mark&#39;s point that queries=
 will fail when the client is behind a validating resolver that has no spec=
ial knowledge of ipv4only.arpa.</div><div><br></div><div>To resolve this, w=
e&#39;ll update=C2=A0draft-cheshire-sudn-ipv4only-dot-arpa to mention that =
ipv4only.arpa MUST NOT be signed.</div><div><br></div></div></div><div>Than=
ks,</div><div>David</div></div></div>______________________________________=
_________<br>
DNSOP mailing list<br>
<a href=3D"mailto:DNSOP@ietf.org" target=3D"_blank">DNSOP@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/dnsop" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/dnsop</a><br>
</blockquote></div></div>

--000000000000739aba056ef4b4f7--


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From: Mark Andrews <marka@isc.org>
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Date: Tue, 19 Jun 2018 12:16:01 +1000
Cc: David Schinazi <dschinazi@apple.com>, IPv6 Operations <v6ops@ietf.org>, Michelle Cotton via RT <iana-questions@iana.org>, Stuart Cheshire <cheshire@apple.com>, Warren Kumari <warren@kumari.net>, dnsop <dnsop@ietf.org>
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References: <rt-4.2.9-2607-1515188710-296.989438-6-0@icann.org> <FAA35F1A-9AD4-4993-9A5C-53A6143B9DE7@isc.org> <43D81243-B2D8-4622-B03D-D20DB7EC243C@apple.com> <DE670372-BF0E-4A81-8DB3-6CC2595B7D8E@isc.org> <CAHw9_iKBiWe4-EgMkT6_rYHDS0QLjbaZ1BYAsg3XkF2368g+rg@mail.gmail.com> <A9DBE612-8260-45D6-9693-6ABA2628CE80@apple.com> <CAPt1N1mzNa5i42-ATH_1wOq5qoexKTy6qK2vZOo2ipvjYb2axQ@mail.gmail.com>
To: Ted Lemon <mellon@fugue.com>
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Subject: Re: [v6ops] [DNSOP] [IANA #989438] ipv4only.arpa's delegation should be insecure.
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> On 19 Jun 2018, at 11:35 am, Ted Lemon <mellon@fugue.com> wrote:
>=20
> You should steal the text from the dot home RFC.=20
>=20
> On Mon, Jun 18, 2018 at 9:30 PM David Schinazi <dschinazi@apple.com> =
wrote:
> Hi, responses inline.
>=20
>> On Tue, Jun 12, 2018 at 11:16 PM Mark Andrews <marka@isc.org> wrote:
>>=20
>> This does not meet my requirements. There is zero need for any part =
of the normal DNS resolution
>> process to know the IPV4ONLY.ARPA is special if IANA stopped signing =
the zone.
>=20
> Could you take a look at draft-cheshire-sudn-ipv4only-dot-arpa please? =
It explains why some parts of the DNS resolution process do need to =
treat ipv4only.arpa as special, regardless of DNSSEC.
>=20
>> On Jun 13, 2018, at 19:19, Warren Kumari <warren@kumari.net> wrote:
>>=20
>> I read that a few times, and even when squinting I cannot figure out =
how that is supposed to work. Can someone enlighten me? I can see how a =
signed ipv4only.arpa allows a validating DNS64 server to validate the =
(well known!) v4 addresses, but the malicious AAAA RR detection bit =
confuses me...
>=20
> I agree, there is no point in signing the A records for ipv4only.arpa =
since they are well-known, and for the same reason there is no point in =
checking it. So having A records signed or unsigned is irrelevant since =
no one should be querying for these A records anyway. Similarly, since =
the whole purpose of the AAAA records for ipv4only.arpa is to be =
overridden by a DNS64 recursive resolver which is not owned by .arpa, =
checking signatures will not validate anything useful.

No.  You expect DNS64 recursive server to query for them as part of the =
synthesis process when they get a request from a device that is =
attempting to configuring the CLAT service by asking for the AAAA =
records for ipv4only.arpa.  And to be pedantic one is overriding the =
NODATA response as there are no AAAA records for ipv4only.arpa.

> I agree with Mark's point that queries will fail when the client is =
behind a validating resolver that has no special knowledge of =
ipv4only.arpa.
>=20
> To resolve this, we'll update draft-cheshire-sudn-ipv4only-dot-arpa to =
mention that ipv4only.arpa MUST NOT be signed.
>=20
> Thanks,
> David
> _______________________________________________
> DNSOP mailing list
> DNSOP@ietf.org
> https://www.ietf.org/mailman/listinfo/dnsop

--=20
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka@isc.org


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From: <mohamed.boucadair@orange.com>
To: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
CC: "v6ops@ietf.org" <v6ops@ietf.org>
Thread-Topic: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt
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Subject: [v6ops] "BoF" for I-D -- Re: Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Dear Lee,

Thank you very much for offering your help and participation. I have 
decided to write the draft and I invite you to be a co-author.

Are there some other people, who would like to join us?

I plan to put together a table with the information extracted from past 
e-mails on the list and send it to Lee (and possibly other participants) 
first, and send the Google docs URL to the list after we agreed on its 
initial content.

Best regards,

Gábor


6/18/2018 4:38 PM keltezéssel, Lee Howard írta:
>
> Apparently I'm a week late on this thread. Sorry.
>
> I think an internet-draft in this case would be useful for reflecting 
> the current best knowledge about the technologies. Even if it takes 
> two years or more to publish, a draft is useful to collect  and 
> summarize the detailed academic papers being published, and the 
> structure of writing the draft will help point out areas where further 
> research is needed.
>
> I'm also interested in supporting this work, up to and including 
> working with your students,  providing my own test results, and/or 
> co-authoring.
>
> Lee
>
>
> On 06/15/2018 10:04 AM, JORDI PALET MARTINEZ wrote:
>>
>> I’m not sure it makes sense something that is not published in, let’s 
>> say, maximum one year from now.
>>
>> Anyway, I’m happy to help.
>>
>> By the way, I got some private questions about this … The table that 
>> I’ve posted yesterday, was developed about 3 years ago, and I’ve not 
>> updated it since them. Actually from emails exchanged today, I 
>> discovered a couple of mistakes and also things that can be improved, 
>> so if needed I can update it as well.
>>
>>
>> Regards,
>>
>> Jordi
>>
>> *De: *v6ops <v6ops-bounces@ietf.org> en nombre de Lencse Gábor 
>> <lencse@hit.bme.hu>
>> *Fecha: *viernes, 15 de junio de 2018, 14:25
>> *Para: *Fred Baker <fredbaker.ietf@gmail.com>
>> *CC: *<v6ops@ietf.org>
>> *Asunto: *[v6ops] Pros and Cons of IPv6 Transition Technologies for 
>> IPv4aaS -- Re: no need to update RFC8026 in 
>> draft-ietf-v6ops-transition-ipv4aas
>>
>> Dear Fred,
>>
>> Thank you very much for your invitation. I am willing to accept it, 
>> but I would like to clarify your expectations before saying 'yes'.
>>
>> I have several questions.
>>
>> 1. Depth of the analysis
>>
>> - Basic level: well-known advantages and disadvantages, similarly as 
>> people wrote about MAP-T/E and 464XLAT, but also about DS-Lite and lw4o6.
>> - Advanced level: basic level + security analysis using the 
>> methodology defined in [1] + performance analysis according to RFC 8219.
>>
>> What depth do you recommend?
>>
>> 2. Method for getting the results and their publication
>>
>> As for the information for the basic level, I would prepare a google 
>> docs table, fill in the information I have and send the link to the 
>> v6ops list asking contributions.
>> After commenting and discussing, I would compile it to an I-D.
>>
>> Do you think that v6ops WG would finally agree to publish it as an RFC?
>>
>> As for the information for the advanced level, I would work together 
>> with my students and PhD students, and publish our results first in 
>> academic papers and then include their most important lessons into 
>> the I-D.
>>
>> What do you think of it?
>>
>> 3. Timeline
>>
>> I think that I could put together the first table in a few weeks. The 
>> contribution of the v6ops list members and the discussion could be 
>> done in a few months and then I could compile the results into an I-D 
>> in a few weeks. Perhaps, it could be presented at IETF 103.
>>
>> The further parts would require much more time and results could be 
>> included gradually in 1-2 years.
>>
>> 4. Scope
>>
>> The smallest natural scope includes the technologies for IPv4AAS, 
>> that is: 464XLAT, DS-Lite, MAP-T/E and lw4o6.
>>
>> IPv6 transition technologies for other carefully selected scenarios 
>> might also be included. E.g. I have significant amount of results in 
>> benchmarking DNS64 servers, having a testing tool [2], a well defined 
>> methodology [3] and ready to use results concerning the DNS64 
>> performance of BIND, PowerDNS and Unbound [4].
>> One of my PhD students is currently benchmarking some sateless NAT64 
>> implementations according the the dual DUT setup of RFC 8219 using an 
>> RFC 2544 compatible Tester. Another PhD student is currently working 
>> on a RFC 8219 compliant NAT64 tester program (using DPDK) to be able 
>> to perform single DUT setup NAT64 benchmarking tests.
>>
>> Thus, the scope can be widened, if you would like to.
>>
>> What do you think about my recommendations?
>>
>> Best regards,
>>
>> Gábor
>>
>> References:
>>
>> [1] G. Lencse and Y. Kadobayashi, "Methodology for the identification 
>> of potential security issues of different IPv6 transition 
>> technologies: Threat analysis of DNS64 and stateful NAT64", 
>> /Computers & Security/ (Elsevier), vol. 77, no. 1, pp. 397-411, 
>> August 1, 2018, DOI: 10.1016/j.cose.2018.04.012
>>
>> [2] G. Lencse, D. Bakai, "Design and implementation of a test program 
>> for benchmarking DNS64 servers", /IEICE Transactions on 
>> Communications/, vol. E100-B, no. 6. pp. 948-954, June 2017. DOI: 
>> 10.1587/transcom.2016EBN0007
>>
>> [3] G. Lencse, M. Georgescu, and Y. Kadobayashi, "Benchmarking 
>> Methodology for DNS64 Servers", /Computer Communications/ (Elsevier), 
>> vol. 109, no. 1, pp. 162-175, September 1, 2017, DOI: 
>> 10.1016/j.comcom.2017.06.004
>>
>> [4] G. Lencse and Y. Kadobayashi, "Benchmarking DNS64 
>> Implementations: Theory and Practice", /Computer Communications/ 
>> (Elsevier), vol. 127, no. 1, pp. 61-74, September 1, 2018, DOI: 
>> 10.1016/j.comcom.2018.05.005
>>
>> 6/14/2018 10:42 PM keltezéssel, Fred Baker írta:
>>
>>     On Jun 14, 2018, at 1:15 PM, Lencse Gábor<lencse@hit.bme.hu> <mailto:lencse@hit.bme.hu>  wrote:
>>
>>         I have an idea: perhaps you could add a section about the pros and cons of each transition technology covered by the draft. (It could be helpful for the network operators when selecting the technology matching their need the best. However, I am not sure whether it is in the scope of this draft.)
>>
>>     It would be incredibly useful. That said, it often involves value judgements, which are essentially in the eye of the beholder.
>>
>>     We have had a recent thread regarding 464xlat and MAP-T. If I can say this without actually putting words into Lorenzo's mouth, his issues with translation in general are probably summarized in RFC 2993, and I would agree with him. The distinction between 464xlat and MAP-T you'll have to find in his emails; they are both services an ISP might deploy, and while they use the same tool (translation) they are not the same service. It seems to be generally agreed that MAP-T is more expensive to deploy than 464xlat; the question is what the extra expense buys, and whether someone agrees that the result is worth the cost.
>>
>>     So in your proposed section, I would have to ask Jordi to not only say "MAP-T costs more to deploy than 464xlat", but gives the argument that might lead someone to choose MAP-T.
>>
>>     And then we get to the large variety of other technologies, some of which presume an IPv4 core network and some an IPv6 core network (and none of which assume an MPLS core network carrying both kinds of traffic).
>>
>>     If you would like to write such a document, please be my guest, by all means. But I'm not going to expect Jordi to do all that in the coming two weeks...
>>
>>
>> _______________________________________________ v6ops mailing list 
>> v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>>
>>
>> **********************************************
>> IPv4 is over
>> Are you ready for the new Internet ?
>> http://www.consulintel.es
>> The IPv6 Company
>>
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>> or confidential. The information is intended to be for the exclusive 
>> use of the individual(s) named above and further non-explicilty 
>> authorized disclosure, copying, distribution or use of the contents 
>> of this information, even if partially, including attached files, is 
>> strictly prohibited and will be considered a criminal offense. If you 
>> are not the intended recipient be aware that any disclosure, copying, 
>> distribution or use of the contents of this information, even if 
>> partially, including attached files, is strictly prohibited, will be 
>> considered a criminal offense, so you must reply to the original 
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    Dear Lee,<br>
    <br>
    Thank you very much for offering your help and participation. I have
    decided to write the draft and I invite you to be a co-author.<br>
    <br>
    Are there some other people, who would like to join us?<br>
    <br>
    I plan to put together a table with the information extracted from
    past e-mails on the list and send it to Lee (and possibly other
    participants) first, and send the Google docs URL to the list after
    we agreed on its initial content.<br>
    <br>
    Best regards,<br>
    <br>
    Gábor<br>
    <br>
    <br>
    <div class="moz-cite-prefix">6/18/2018 4:38 PM keltezéssel, Lee
      Howard írta:<br>
    </div>
    <blockquote
      cite="mid:67b5991a-e7ac-aef2-eeae-7531598428fe@asgard.org"
      type="cite">
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      <p>Apparently I'm a week late on this thread. Sorry.</p>
      <p>I think an internet-draft in this case would be useful for
        reflecting the current best knowledge about the technologies.
        Even if it takes two years or more to publish, a draft is useful
        to collect  and summarize the detailed academic papers being
        published, and the structure of writing the draft will help
        point out areas where further research is needed.</p>
      <p>I'm also interested in supporting this work, up to and
        including working with your students,  providing my own test
        results, and/or co-authoring.<br>
      </p>
      <p>Lee<br>
      </p>
      <br>
      <div class="moz-cite-prefix">On 06/15/2018 10:04 AM, JORDI PALET
        MARTINEZ wrote:<br>
      </div>
      <blockquote type="cite"
        cite="mid:1BFAD96D-F06E-4EBF-8751-761EF08E6EE0@consulintel.es">
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          <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
              lang="EN-US">I’m not sure it makes sense something that is
              not published in, let’s say, maximum one year from now.<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
              lang="EN-US"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
              lang="EN-US">Anyway, I’m happy to help.<o:p></o:p></span></p>
          <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
              lang="EN-US"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
              lang="EN-US">By the way, I got some private questions
              about this … The table that I’ve posted yesterday, was
              developed about 3 years ago, and I’ve not updated it since
              them. Actually from emails exchanged today, I discovered a
              couple of mistakes and also things that can be improved,
              so if needed I can update it as well.<o:p></o:p></span></p>
          <div>
            <p class="MsoNormal"><span
                style="font-size:10.5pt;color:black" lang="EN-US"><br>
              </span><span style="font-size:10.5pt;color:black"
                lang="ES-TRAD">Regards,<o:p></o:p></span></p>
            <p class="MsoNormal" style="margin-bottom:12.0pt"><span
                style="font-size:10.5pt;color:black;mso-fareast-language:EN-US"
                lang="ES-TRAD">Jordi<o:p></o:p></span></p>
            <p class="MsoNormal" style="margin-bottom:12.0pt"><span
                style="font-size:10.5pt;color:black;mso-fareast-language:EN-US"
                lang="ES-TRAD"><o:p> </o:p></span></p>
          </div>
          <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
              lang="ES-TRAD"><o:p> </o:p></span></p>
          <p class="MsoNormal"><span style="mso-fareast-language:EN-US"
              lang="ES-TRAD"><o:p> </o:p></span></p>
          <div style="border:none;border-top:solid #B5C4DF
            1.0pt;padding:3.0pt 0cm 0cm 0cm">
            <p class="MsoNormal" style="margin-left:35.4pt"><b><span
                  style="font-size:12.0pt;color:black">De: </span></b><span
                style="font-size:12.0pt;color:black">v6ops <a
                  moz-do-not-send="true" class="moz-txt-link-rfc2396E"
                  href="mailto:v6ops-bounces@ietf.org">&lt;v6ops-bounces@ietf.org&gt;</a>
                en nombre de Lencse Gábor <a moz-do-not-send="true"
                  class="moz-txt-link-rfc2396E"
                  href="mailto:lencse@hit.bme.hu">&lt;lencse@hit.bme.hu&gt;</a><br>
                <b>Fecha: </b>viernes, 15 de junio de 2018, 14:25<br>
                <b>Para: </b>Fred Baker <a moz-do-not-send="true"
                  class="moz-txt-link-rfc2396E"
                  href="mailto:fredbaker.ietf@gmail.com">&lt;fredbaker.ietf@gmail.com&gt;</a><br>
                <b>CC: </b><a moz-do-not-send="true"
                  class="moz-txt-link-rfc2396E"
                  href="mailto:v6ops@ietf.org">&lt;v6ops@ietf.org&gt;</a><br>
                <b>Asunto: </b>[v6ops] Pros and Cons of IPv6 Transition
                Technologies for IPv4aaS -- Re: no need to update
                RFC8026 in draft-ietf-v6ops-transition-ipv4aas<o:p></o:p></span></p>
          </div>
          <div>
            <p class="MsoNormal" style="margin-left:35.4pt"><o:p> </o:p></p>
          </div>
          <p class="MsoNormal"
style="mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt">Dear
            Fred,<br>
            <br>
            Thank you very much for your invitation. I am willing to
            accept it, but I would like to clarify your expectations
            before saying 'yes'.<br>
            <br>
            I have several questions.<br>
            <br>
            1. Depth of the analysis<br>
            <br>
            - Basic level: well-known advantages and disadvantages,
            similarly as people wrote about MAP-T/E and 464XLAT, but
            also about DS-Lite and lw4o6.<br>
            - Advanced level: basic level + security analysis using the
            methodology defined in [1] + performance analysis according
            to RFC 8219.<br>
            <br>
            What depth do you recommend?<br>
            <br>
            2. Method for getting the results and their publication<br>
            <br>
            As for the information for the basic level, I would prepare
            a google docs table, fill in the information I have and send
            the link to the v6ops list asking contributions.<br>
            After commenting and discussing, I would compile it to an
            I-D. <br>
            <br>
            Do you think that v6ops WG would finally agree to publish it
            as an RFC?<br>
            <br>
            As for the information for the advanced level, I would work
            together with my students and PhD students, and publish our
            results first in academic papers and then include their most
            important lessons into the I-D.<br>
            <br>
            What do you think of it?<br>
            <br>
            3. Timeline<br>
            <br>
            I think that I could put together the first table in a few
            weeks. The contribution of the v6ops list members and the
            discussion could be done in a few months and then I could
            compile the results into an I-D in a few weeks. Perhaps, it
            could be presented at IETF 103.<br>
            <br>
            The further parts would require much more time and results
            could be included gradually in 1-2 years.<br>
            <br>
            4. Scope<br>
            <br>
            The smallest natural scope includes the technologies for
            IPv4AAS, that is: 464XLAT, DS-Lite, MAP-T/E and lw4o6.<br>
            <br>
            IPv6 transition technologies for other carefully selected
            scenarios might also be included. E.g. I have significant
            amount of results in benchmarking DNS64 servers, having a
            testing tool [2], a well defined methodology [3] and ready
            to use results concerning the DNS64 performance of BIND,
            PowerDNS and Unbound [4]. <br>
            One of my PhD students is currently benchmarking some
            sateless NAT64 implementations according the the dual DUT
            setup of RFC 8219 using an RFC 2544 compatible Tester.
            Another PhD student is currently working on a RFC 8219
            compliant NAT64 tester program (using DPDK) to be able to
            perform single DUT setup NAT64 benchmarking tests. <br>
            <br>
            Thus, the scope can be widened, if you would like to.<br>
            <br>
            What do you think about my recommendations?<br>
            <br>
            Best regards,<br>
            <br>
            Gábor<br>
            <br>
            References:<br>
            <br>
            [1] G. Lencse and Y. Kadobayashi, "Methodology for the
            identification of potential security issues of different
            IPv6 transition technologies: Threat analysis of DNS64 and
            stateful NAT64", <i>Computers &amp; Security</i>
            (Elsevier), vol. 77, no. 1, pp. 397-411, August 1, 2018,
            DOI: 10.1016/j.cose.2018.04.012<br>
            <br>
            [2] G. Lencse, D. Bakai, "Design and implementation of a
            test program for benchmarking DNS64 servers", <i>IEICE
              Transactions on Communications</i>, vol. E100-B, no. 6.
            pp. 948-954, June 2017. DOI: 10.1587/transcom.2016EBN0007<br>
            <br>
            [3] G. Lencse, M. Georgescu, and Y. Kadobayashi,
            "Benchmarking Methodology for DNS64 Servers", <i>Computer
              Communications</i> (Elsevier), vol. 109, no. 1, pp.
            162-175, September 1, 2017, DOI:
            10.1016/j.comcom.2017.06.004<br>
            <br>
            [4] G. Lencse and Y. Kadobayashi, "Benchmarking DNS64
            Implementations: Theory and Practice", <i>Computer
              Communications</i> (Elsevier), vol. 127, no. 1, pp. 61-74,
            September 1, 2018, DOI: 10.1016/j.comcom.2018.05.005<br>
            <br>
            <o:p></o:p></p>
          <div>
            <p class="MsoNormal" style="margin-left:35.4pt">6/14/2018
              10:42 PM keltezéssel, Fred Baker írta:<o:p></o:p></p>
          </div>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <pre style="margin-left:35.4pt"><o:p> </o:p></pre>
            <pre style="margin-left:35.4pt">On Jun 14, 2018, at 1:15 PM, Lencse Gábor <a href="mailto:lencse@hit.bme.hu" moz-do-not-send="true">&lt;lencse@hit.bme.hu&gt;</a> wrote:<o:p></o:p></pre>
            <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
              <pre style="margin-left:35.4pt">I have an idea: perhaps you could add a section about the pros and cons of each transition technology covered by the draft. (It could be helpful for the network operators when selecting the technology matching their need the best. However, I am not sure whether it is in the scope of this draft.)<o:p></o:p></pre>
            </blockquote>
            <pre style="margin-left:35.4pt">It would be incredibly useful. That said, it often involves value judgements, which are essentially in the eye of the beholder.<o:p></o:p></pre>
            <pre style="margin-left:35.4pt"><o:p> </o:p></pre>
            <pre style="margin-left:35.4pt">We have had a recent thread regarding 464xlat and MAP-T. If I can say this without actually putting words into Lorenzo's mouth, his issues with translation in general are probably summarized in RFC 2993, and I would agree with him. The distinction between 464xlat and MAP-T you'll have to find in his emails; they are both services an ISP might deploy, and while they use the same tool (translation) they are not the same service. It seems to be generally agreed that MAP-T is more expensive to deploy than 464xlat; the question is what the extra expense buys, and whether someone agrees that the result is worth the cost.<o:p></o:p></pre>
            <pre style="margin-left:35.4pt"><o:p> </o:p></pre>
            <pre style="margin-left:35.4pt">So in your proposed section, I would have to ask Jordi to not only say "MAP-T costs more to deploy than 464xlat", but gives the argument that might lead someone to choose MAP-T.<o:p></o:p></pre>
            <pre style="margin-left:35.4pt"><o:p> </o:p></pre>
            <pre style="margin-left:35.4pt">And then we get to the large variety of other technologies, some of which presume an IPv4 core network and some an IPv6 core network (and none of which assume an MPLS core network carrying both kinds of traffic).<o:p></o:p></pre>
            <pre style="margin-left:35.4pt"><o:p> </o:p></pre>
            <pre style="margin-left:35.4pt">If you would like to write such a document, please be my guest, by all means. But I'm not going to expect Jordi to do all that in the coming two weeks...<o:p></o:p></pre>
          </blockquote>
          <p class="MsoNormal" style="margin-left:35.4pt"><br>
            _______________________________________________ v6ops
            mailing list <a moz-do-not-send="true"
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              href="https://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mailman/listinfo/v6ops</a>
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        <br>
        **********************************************<br>
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Date: Tue, 19 Jun 2018 09:28:42 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lencse =?UTF-8?B?R8OhYm9y?= <lencse@hit.bme.hu>, <v6ops@ietf.org>
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Thread-Topic: [v6ops] "BoF" for I-D -- Re: Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
References: <940CC666-9208-4784-B452-58D5482B7782@consulintel.es> <d8960bbf-ba84-e7e1-6d2b-63f973a7f33c@hit.bme.hu> <C40B15B6-4AB9-433F-94AD-A2624F359DC4@gmail.com> <6b691c03-a2ee-3656-e1bc-edbb17583216@hit.bme.hu> <1BFAD96D-F06E-4EBF-8751-761EF08E6EE0@consulintel.es> <67b5991a-e7ac-aef2-eeae-7531598428fe@asgard.org> <211c5c27-11a3-b264-3b5a-9d8f10f6ec45@hit.bme.hu>
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Subject: Re: [v6ops] "BoF" for I-D -- Re: Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Hi Lenser,

=20

Yeah, I will be happy to join as well.


Regards,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lencse G=C3=A1bor <lencse@h=
it.bme.hu>
Fecha: martes, 19 de junio de 2018, 9:09
Para: <v6ops@ietf.org>
Asunto: [v6ops] "BoF" for I-D -- Re: Pros and Cons of IPv6 Transition Techn=
ologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-tr=
ansition-ipv4aas

=20

Dear Lee,

Thank you very much for offering your help and participation. I have decide=
d to write the draft and I invite you to be a co-author.

Are there some other people, who would like to join us?

I plan to put together a table with the information extracted from past e-m=
ails on the list and send it to Lee (and possibly other participants) first=
, and send the Google docs URL to the list after we agreed on its initial c=
ontent.

Best regards,

G=C3=A1bor

6/18/2018 4:38 PM keltez=C3=A9ssel, Lee Howard =C3=ADrta:

Apparently I'm a week late on this thread. Sorry.

I think an internet-draft in this case would be useful for reflecting the c=
urrent best knowledge about the technologies. Even if it takes two years or=
 more to publish, a draft is useful to collect  and summarize the detailed =
academic papers being published, and the structure of writing the draft wil=
l help point out areas where further research is needed.

I'm also interested in supporting this work, up to and including working wi=
th your students,  providing my own test results, and/or co-authoring.

Lee

=20

On 06/15/2018 10:04 AM, JORDI PALET MARTINEZ wrote:

I=E2=80=99m not sure it makes sense something that is not published in, let=
=E2=80=99s say, maximum one year from now.

=20

Anyway, I=E2=80=99m happy to help.

=20

By the way, I got some private questions about this =E2=80=A6 The table tha=
t I=E2=80=99ve posted yesterday, was developed about 3 years ago, and I=E2=
=80=99ve not updated it since them. Actually from emails exchanged today, I=
 discovered a couple of mistakes and also things that can be improved, so i=
f needed I can update it as well.


Regards,

Jordi

=20

=20

=20

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lencse G=C3=A1bor <lencse@h=
it.bme.hu>
Fecha: viernes, 15 de junio de 2018, 14:25
Para: Fred Baker <fredbaker.ietf@gmail.com>
CC: <v6ops@ietf.org>
Asunto: [v6ops] Pros and Cons of IPv6 Transition Technologies for IPv4aaS -=
- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas

=20

Dear Fred,

Thank you very much for your invitation. I am willing to accept it, but I w=
ould like to clarify your expectations before saying 'yes'.

I have several questions.

1. Depth of the analysis

- Basic level: well-known advantages and disadvantages, similarly as people=
 wrote about MAP-T/E and 464XLAT, but also about DS-Lite and lw4o6.
- Advanced level: basic level + security analysis using the methodology def=
ined in [1] + performance analysis according to RFC 8219.

What depth do you recommend?

2. Method for getting the results and their publication

As for the information for the basic level, I would prepare a google docs t=
able, fill in the information I have and send the link to the v6ops list as=
king contributions.
After commenting and discussing, I would compile it to an I-D.=20

Do you think that v6ops WG would finally agree to publish it as an RFC?

As for the information for the advanced level, I would work together with m=
y students and PhD students, and publish our results first in academic pape=
rs and then include their most important lessons into the I-D.

What do you think of it?

3. Timeline

I think that I could put together the first table in a few weeks. The contr=
ibution of the v6ops list members and the discussion could be done in a few=
 months and then I could compile the results into an I-D in a few weeks. Pe=
rhaps, it could be presented at IETF 103.

The further parts would require much more time and results could be include=
d gradually in 1-2 years.

4. Scope

The smallest natural scope includes the technologies for IPv4AAS, that is: =
464XLAT, DS-Lite, MAP-T/E and lw4o6.

IPv6 transition technologies for other carefully selected scenarios might a=
lso be included. E.g. I have significant amount of results in benchmarking =
DNS64 servers, having a testing tool [2], a well defined methodology [3] an=
d ready to use results concerning the DNS64 performance of BIND, PowerDNS a=
nd Unbound [4].=20
One of my PhD students is currently benchmarking some sateless NAT64 implem=
entations according the the dual DUT setup of RFC 8219 using an RFC 2544 co=
mpatible Tester. Another PhD student is currently working on a RFC 8219 com=
pliant NAT64 tester program (using DPDK) to be able to perform single DUT s=
etup NAT64 benchmarking tests.=20

Thus, the scope can be widened, if you would like to.

What do you think about my recommendations?

Best regards,

G=C3=A1bor

References:

[1] G. Lencse and Y. Kadobayashi, "Methodology for the identification of po=
tential security issues of different IPv6 transition technologies: Threat a=
nalysis of DNS64 and stateful NAT64", Computers & Security (Elsevier), vol.=
 77, no. 1, pp. 397-411, August 1, 2018, DOI: 10.1016/j.cose.2018.04.012

[2] G. Lencse, D. Bakai, "Design and implementation of a test program for b=
enchmarking DNS64 servers", IEICE Transactions on Communications, vol. E100=
-B, no. 6. pp. 948-954, June 2017. DOI: 10.1587/transcom.2016EBN0007

[3] G. Lencse, M. Georgescu, and Y. Kadobayashi, "Benchmarking Methodology =
for DNS64 Servers", Computer Communications (Elsevier), vol. 109, no. 1, pp=
. 162-175, September 1, 2017, DOI: 10.1016/j.comcom.2017.06.004

[4] G. Lencse and Y. Kadobayashi, "Benchmarking DNS64 Implementations: Theo=
ry and Practice", Computer Communications (Elsevier), vol. 127, no. 1, pp. =
61-74, September 1, 2018, DOI: 10.1016/j.comcom.2018.05.005


6/14/2018 10:42 PM keltez=C3=A9ssel, Fred Baker =C3=ADrta:
=20
On Jun 14, 2018, at 1:15 PM, Lencse G=C3=A1bor <lencse@hit.bme.hu> wrote:
I have an idea: perhaps you could add a section about the pros and cons of =
each transition technology covered by the draft. (It could be helpful for t=
he network operators when selecting the technology matching their need the =
best. However, I am not sure whether it is in the scope of this draft.)
It would be incredibly useful. That said, it often involves value judgement=
s, which are essentially in the eye of the beholder.
=20
We have had a recent thread regarding 464xlat and MAP-T. If I can say this =
without actually putting words into Lorenzo's mouth, his issues with transl=
ation in general are probably summarized in RFC 2993, and I would agree wit=
h him. The distinction between 464xlat and MAP-T you'll have to find in his=
 emails; they are both services an ISP might deploy, and while they use the=
 same tool (translation) they are not the same service. It seems to be gene=
rally agreed that MAP-T is more expensive to deploy than 464xlat; the quest=
ion is what the extra expense buys, and whether someone agrees that the res=
ult is worth the cost.
=20
So in your proposed section, I would have to ask Jordi to not only say "MAP=
-T costs more to deploy than 464xlat", but gives the argument that might le=
ad someone to choose MAP-T.
=20
And then we get to the large variety of other technologies, some of which p=
resume an IPv4 core network and some an IPv6 core network (and none of whic=
h assume an MPLS core network carrying both kinds of traffic).
=20
If you would like to write such a document, please be my guest, by all mean=
s. But I'm not going to expect Jordi to do all that in the coming two weeks=
...

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20


**********************************************
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This electronic message contains information which may be privileged or con=
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copying, distribution or use of the contents of this information, even if p=
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_______________________________________________
v6ops mailing list
v6ops@ietf.org
https://www.ietf.org/mailman/listinfo/v6ops




_______________________________________________
v6ops mailing list
v6ops@ietf.org
https://www.ietf.org/mailman/listinfo/v6ops

_______________________________________________ v6ops mailing list v6ops@ie=
tf.org https://www.ietf.org/mailman/listinfo/v6ops=20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.


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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-fareast-=
language:EN-US'>Hi Lenser,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DES-TRAD style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span=
></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:=
EN-US'>Yeah, I will be happy to join as well.<o:p></o:p></span></p><div><p =
class=3DMsoNormal><span lang=3DEN-US style=3D'font-size:10.5pt;color:black'=
><br></span><span lang=3DES-TRAD style=3D'font-size:10.5pt;color:black'>Reg=
ards,<o:p></o:p></span></p><p class=3DMsoNormal style=3D'margin-bottom:12.0=
pt'><span lang=3DES-TRAD style=3D'font-size:10.5pt;color:black;mso-fareast-=
language:EN-US'>Jordi<o:p></o:p></span></p><p class=3DMsoNormal style=3D'ma=
rgin-bottom:12.0pt'><span lang=3DES-TRAD style=3D'font-size:10.5pt;color:bl=
ack;mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p></div><p class=
=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-fareast-language:EN-US'><o:p=
>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DES-TRAD style=3D'=
mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><div style=3D'borde=
r:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=
=3DMsoNormal style=3D'margin-left:35.4pt'><b><span style=3D'font-size:12.0p=
t;color:black'>De: </span></b><span style=3D'font-size:12.0pt;color:black'>=
v6ops &lt;v6ops-bounces@ietf.org&gt; en nombre de Lencse G=C3=A1bor &lt;len=
cse@hit.bme.hu&gt;<br><b>Fecha: </b>martes, 19 de junio de 2018, 9:09<br><b=
>Para: </b>&lt;v6ops@ietf.org&gt;<br><b>Asunto: </b>[v6ops] &quot;BoF&quot;=
 for I-D -- Re: Pros and Cons of IPv6 Transition Technologies for IPv4aaS -=
- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas<o:p>=
</o:p></span></p></div><div><p class=3DMsoNormal style=3D'margin-left:35.4p=
t'><o:p>&nbsp;</o:p></p></div><p class=3DMsoNormal style=3D'mso-margin-top-=
alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt'>Dear Lee,=
<br><br>Thank you very much for offering your help and participation. I hav=
e decided to write the draft and I invite you to be a co-author.<br><br>Are=
 there some other people, who would like to join us?<br><br>I plan to put t=
ogether a table with the information extracted from past e-mails on the lis=
t and send it to Lee (and possibly other participants) first, and send the =
Google docs URL to the list after we agreed on its initial content.<br><br>=
Best regards,<br><br>G=C3=A1bor<br><br><o:p></o:p></p><div><p class=3DMsoNo=
rmal style=3D'margin-left:35.4pt'>6/18/2018 4:38 PM keltez=C3=A9ssel, Lee H=
oward =C3=ADrta:<o:p></o:p></p></div><blockquote style=3D'margin-top:5.0pt;=
margin-bottom:5.0pt'><p style=3D'margin-left:35.4pt'>Apparently I'm a week =
late on this thread. Sorry.<o:p></o:p></p><p style=3D'margin-left:35.4pt'>I=
 think an internet-draft in this case would be useful for reflecting the cu=
rrent best knowledge about the technologies. Even if it takes two years or =
more to publish, a draft is useful to collect&nbsp; and summarize the detai=
led academic papers being published, and the structure of writing the draft=
 will help point out areas where further research is needed.<o:p></o:p></p>=
<p style=3D'margin-left:35.4pt'>I'm also interested in supporting this work=
, up to and including working with your students,&nbsp; providing my own te=
st results, and/or co-authoring.<o:p></o:p></p><p style=3D'margin-left:35.4=
pt'>Lee<o:p></o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'><o:=
p>&nbsp;</o:p></p><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'>On=
 06/15/2018 10:04 AM, JORDI PALET MARTINEZ wrote:<o:p></o:p></p></div><bloc=
kquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal =
style=3D'margin-left:35.4pt'><span lang=3DEN-US style=3D'mso-fareast-langua=
ge:EN-US'>I=E2=80=99m not sure it makes sense something that is not publish=
ed in, let=E2=80=99s say, maximum one year from now.</span><o:p></o:p></p><=
p class=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3DEN-US style=
=3D'mso-fareast-language:EN-US'>&nbsp;</span><o:p></o:p></p><p class=3DMsoN=
ormal style=3D'margin-left:35.4pt'><span lang=3DEN-US style=3D'mso-fareast-=
language:EN-US'>Anyway, I=E2=80=99m happy to help.</span><o:p></o:p></p><p class=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3D=
EN-US style=3D'mso-fareast-language:EN-US'>&nbsp;</span><o:p></o:p></p><p c=
lass=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3DEN-US style=3D'm=
so-fareast-language:EN-US'>By the way, I got some private questions about t=
his =E2=80=A6 The table that I=E2=80=99ve posted yesterday, was developed a=
bout 3 years ago, and I=E2=80=99ve not updated it since them. Actually from=
 emails exchanged today, I discovered a couple of mistakes and also things =
that can be improved, so if needed I can update it as well.</span><o:p></o:=
p></p><div><p class=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3DE=
N-US style=3D'font-size:10.5pt;color:black'><br></span><span lang=3DES-TRAD=
 style=3D'font-size:10.5pt;color:black'>Regards,</span><o:p></o:p></p><p cl=
ass=3DMsoNormal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bot=
tom:12.0pt;margin-left:35.4pt'><span lang=3DES-TRAD style=3D'font-size:10.5=
pt;color:black;mso-fareast-language:EN-US'>Jordi</span><o:p></o:p></p><p cl=
ass=3DMsoNormal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bot=
tom:12.0pt;margin-left:35.4pt'><span lang=3DES-TRAD style=3D'font-size:10.5=
pt;color:black;mso-fareast-language:EN-US'>&nbsp;</span><o:p></o:p></p></di=
v><p class=3DMsoNormal style=3D'margin-left:35.4pt'><span lang=3DES-TRAD st=
yle=3D'mso-fareast-language:EN-US'>&nbsp;</span><o:p></o:p></p><p class=3DM=
soNormal style=3D'margin-left:35.4pt'><span lang=3DES-TRAD style=3D'mso-far=
east-language:EN-US'>&nbsp;</span><o:p></o:p></p><div style=3D'border:none;=
border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=3DMsoNor=
mal style=3D'margin-left:70.8pt'><b><span style=3D'font-size:12.0pt;color:b=
lack'>De: </span></b><span style=3D'font-size:12.0pt;color:black'>v6ops <a =
href=3D"mailto:v6ops-bounces@ietf.org">&lt;v6ops-bounces@ietf.org&gt;</a> e=
n nombre de Lencse G=C3=A1bor <a href=3D"mailto:lencse@hit.bme.hu">&lt;lenc=
se@hit.bme.hu&gt;</a><br><b>Fecha: </b>viernes, 15 de junio de 2018, 14:25<=
br><b>Para: </b>Fred Baker <a href=3D"mailto:fredbaker.ietf@gmail.com">&lt;=
fredbaker.ietf@gmail.com&gt;</a><br><b>CC: </b><a href=3D"mailto:v6ops@ietf=
.org">&lt;v6ops@ietf.org&gt;</a><br><b>Asunto: </b>[v6ops] Pros and Cons of=
 IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 =
in draft-ietf-v6ops-transition-ipv4aas</span><o:p></o:p></p></div><div><p c=
lass=3DMsoNormal style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></p></div><p=
 class=3DMsoNormal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-=
bottom:12.0pt;margin-left:70.8pt'>Dear Fred,<br><br>Thank you very much for=
 your invitation. I am willing to accept it, but I would like to clarify yo=
ur expectations before saying 'yes'.<br><br>I have several questions.<br><b=
r>1. Depth of the analysis<br><br>- Basic level: well-known advantages and =
disadvantages, similarly as people wrote about MAP-T/E and 464XLAT, but als=
o about DS-Lite and lw4o6.<br>- Advanced level: basic level + security anal=
ysis using the methodology defined in [1] + performance analysis according =
to RFC 8219.<br><br>What depth do you recommend?<br><br>2. Method for getti=
ng the results and their publication<br><br>As for the information for the =
basic level, I would prepare a google docs table, fill in the information I=
 have and send the link to the v6ops list asking contributions.<br>After co=
mmenting and discussing, I would compile it to an I-D. <br><br>Do you think=
 that v6ops WG would finally agree to publish it as an RFC?<br><br>As for t=
he information for the advanced level, I would work together with my studen=
ts and PhD students, and publish our results first in academic papers and t=
hen include their most important lessons into the I-D.<br><br>What do you t=
hink of it?<br><br>3. Timeline<br><br>I think that I could put together the=
 first table in a few weeks. The contribution of the v6ops list members and=
 the discussion could be done in a few months and then I could compile the =
results into an I-D in a few weeks. Perhaps, it could be presented at IETF =
103.<br><br>The further parts would require much more time and results coul=
d be included gradually in 1-2 years.<br><br>4. Scope<br><br>The smallest natural scope includes the technologies for IPv4AAS, that is: 464XLAT, DS-L=
ite, MAP-T/E and lw4o6.<br><br>IPv6 transition technologies for other caref=
ully selected scenarios might also be included. E.g. I have significant amo=
unt of results in benchmarking DNS64 servers, having a testing tool [2], a =
well defined methodology [3] and ready to use results concerning the DNS64 =
performance of BIND, PowerDNS and Unbound [4]. <br>One of my PhD students i=
s currently benchmarking some sateless NAT64 implementations according the =
the dual DUT setup of RFC 8219 using an RFC 2544 compatible Tester. Another=
 PhD student is currently working on a RFC 8219 compliant NAT64 tester prog=
ram (using DPDK) to be able to perform single DUT setup NAT64 benchmarking =
tests. <br><br>Thus, the scope can be widened, if you would like to.<br><br=
>What do you think about my recommendations?<br><br>Best regards,<br><br>G=
=C3=A1bor<br><br>References:<br><br>[1] G. Lencse and Y. Kadobayashi, &quot=
;Methodology for the identification of potential security issues of differe=
nt IPv6 transition technologies: Threat analysis of DNS64 and stateful NAT6=
4&quot;, <i>Computers &amp; Security</i> (Elsevier), vol. 77, no. 1, pp. 39=
7-411, August 1, 2018, DOI: 10.1016/j.cose.2018.04.012<br><br>[2] G. Lencse=
, D. Bakai, &quot;Design and implementation of a test program for benchmark=
ing DNS64 servers&quot;, <i>IEICE Transactions on Communications</i>, vol. =
E100-B, no. 6. pp. 948-954, June 2017. DOI: 10.1587/transcom.2016EBN0007<br=
><br>[3] G. Lencse, M. Georgescu, and Y. Kadobayashi, &quot;Benchmarking Me=
thodology for DNS64 Servers&quot;, <i>Computer Communications</i> (Elsevier=
), vol. 109, no. 1, pp. 162-175, September 1, 2017, DOI: 10.1016/j.comcom.2=
017.06.004<br><br>[4] G. Lencse and Y. Kadobayashi, &quot;Benchmarking DNS6=
4 Implementations: Theory and Practice&quot;, <i>Computer Communications</i=
> (Elsevier), vol. 127, no. 1, pp. 61-74, September 1, 2018, DOI: 10.1016/j=
.comcom.2018.05.005<br><br><br><o:p></o:p></p><div><p class=3DMsoNormal sty=
le=3D'margin-left:70.8pt'>6/14/2018 10:42 PM keltez=C3=A9ssel, Fred Baker =
=C3=ADrta:<o:p></o:p></p></div><blockquote style=3D'margin-top:5.0pt;margin=
-bottom:5.0pt'><pre style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></pre><pr=
e style=3D'margin-left:70.8pt'>On Jun 14, 2018, at 1:15 PM, Lencse G=C3=A1b=
or <a href=3D"mailto:lencse@hit.bme.hu">&lt;lencse@hit.bme.hu&gt;</a> wrote=
:<o:p></o:p></pre><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt=
'><pre style=3D'margin-left:70.8pt'>I have an idea: perhaps you could add a=
 section about the pros and cons of each transition technology covered by t=
he draft. (It could be helpful for the network operators when selecting the=
 technology matching their need the best. However, I am not sure whether it=
 is in the scope of this draft.)<o:p></o:p></pre></blockquote><pre style=3D=
'margin-left:70.8pt'>It would be incredibly useful. That said, it often inv=
olves value judgements, which are essentially in the eye of the beholder.<o=
:p></o:p></pre><pre style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></pre><pr=
e style=3D'margin-left:70.8pt'>We have had a recent thread regarding 464xla=
t and MAP-T. If I can say this without actually putting words into Lorenzo'=
s mouth, his issues with translation in general are probably summarized in =
RFC 2993, and I would agree with him. The distinction between 464xlat and M=
AP-T you'll have to find in his emails; they are both services an ISP might=
 deploy, and while they use the same tool (translation) they are not the sa=
me service. It seems to be generally agreed that MAP-T is more expensive to=
 deploy than 464xlat; the question is what the extra expense buys, and whet=
her someone agrees that the result is worth the cost.<o:p></o:p></pre><pre =
style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></pre><pre style=3D'margin-le=
ft:70.8pt'>So in your proposed section, I would have to ask Jordi to not on=
ly say &quot;MAP-T costs more to deploy than 464xlat&quot;, but gives the a=
rgument that might lead someone to choose MAP-T.<o:p></o:p></pre><pre style=
=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></pre><pre style=3D'margin-left:70=
.8pt'>And then we get to the large variety of other technologies, some of which presume a=
n IPv4 core network and some an IPv6 core network (and none of which assume=
 an MPLS core network carrying both kinds of traffic).<o:p></o:p></pre><pre=
 style=3D'margin-left:70.8pt'>&nbsp;<o:p></o:p></pre><pre style=3D'margin-l=
eft:70.8pt'>If you would like to write such a document, please be my guest,=
 by all means. But I'm not going to expect Jordi to do all that in the comi=
ng two weeks...<o:p></o:p></pre></blockquote><p class=3DMsoNormal style=3D'=
margin-left:70.8pt'><br>_______________________________________________ v6o=
ps mailing list <a href=3D"mailto:v6ops@ietf.org">v6ops@ietf.org</a> <a hre=
f=3D"https://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mail=
man/listinfo/v6ops</a> <o:p></o:p></p><p class=3DMsoNormal style=3D'margin-=
left:35.4pt'><br>**********************************************<br>IPv4 is =
over<br>Are you ready for the new Internet ?<br><a href=3D"http://www.consu=
lintel.es">http://www.consulintel.es</a><br>The IPv6 Company<br><br>This el=
ectronic message contains information which may be privileged or confidenti=
al. The information is intended to be for the exclusive use of the individu=
al(s) named above and further non-explicilty authorized disclosure, copying=
, distribution or use of the contents of this information, even if partiall=
y, including attached files, is strictly prohibited and will be considered =
a criminal offense. If you are not the intended recipient be aware that any=
 disclosure, copying, distribution or use of the contents of this informati=
on, even if partially, including attached files, is strictly prohibited, wi=
ll be considered a criminal offense, so you must reply to the original send=
er to inform about this communication and delete it.<br><br><br><br><br><o:=
p></o:p></p><pre style=3D'margin-left:35.4pt'>_____________________________=
__________________<o:p></o:p></pre><pre style=3D'margin-left:35.4pt'>v6ops =
mailing list<o:p></o:p></pre><pre style=3D'margin-left:35.4pt'><a href=3D"m=
ailto:v6ops@ietf.org">v6ops@ietf.org</a><o:p></o:p></pre><pre style=3D'marg=
in-left:35.4pt'><a href=3D"https://www.ietf.org/mailman/listinfo/v6ops">htt=
ps://www.ietf.org/mailman/listinfo/v6ops</a><o:p></o:p></pre></blockquote><=
p class=3DMsoNormal style=3D'margin-left:35.4pt'><br><br><br><br><o:p></o:p=
></p><pre style=3D'margin-left:35.4pt'>____________________________________=
___________<o:p></o:p></pre><pre style=3D'margin-left:35.4pt'>v6ops mailing=
 list<o:p></o:p></pre><pre style=3D'margin-left:35.4pt'><a href=3D"mailto:v=
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=3DMsoNormal style=3D'margin-left:35.4pt'><br>_____________________________=
__________________ v6ops mailing list v6ops@ietf.org https://www.ietf.org/m=
ailman/listinfo/v6ops <o:p></o:p></p></div><br>****************************=
******************<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
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From: Richard Patterson <richard@helix.net.nz>
Date: Tue, 19 Jun 2018 09:29:14 +0100
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Subject: Re: [v6ops] "BoF" for I-D -- Re: Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Hi Lencse,

I'd be happy to help also.

-Richard
On Tue, 19 Jun 2018 at 08:09, Lencse G=C3=A1bor <lencse@hit.bme.hu> wrote:
>
> Dear Lee,
>
> Thank you very much for offering your help and participation. I have deci=
ded to write the draft and I invite you to be a co-author.
>
> Are there some other people, who would like to join us?
>
> I plan to put together a table with the information extracted from past e=
-mails on the list and send it to Lee (and possibly other participants) fir=
st, and send the Google docs URL to the list after we agreed on its initial=
 content.
>
> Best regards,
>
> G=C3=A1bor
>
>
> 6/18/2018 4:38 PM keltez=C3=A9ssel, Lee Howard =C3=ADrta:
>
> Apparently I'm a week late on this thread. Sorry.
>
> I think an internet-draft in this case would be useful for reflecting the=
 current best knowledge about the technologies. Even if it takes two years =
or more to publish, a draft is useful to collect  and summarize the detaile=
d academic papers being published, and the structure of writing the draft w=
ill help point out areas where further research is needed.
>
> I'm also interested in supporting this work, up to and including working =
with your students,  providing my own test results, and/or co-authoring.
>
> Lee
>
>
> On 06/15/2018 10:04 AM, JORDI PALET MARTINEZ wrote:
>
> I=E2=80=99m not sure it makes sense something that is not published in, l=
et=E2=80=99s say, maximum one year from now.
>
>
>
> Anyway, I=E2=80=99m happy to help.
>
>
>
> By the way, I got some private questions about this =E2=80=A6 The table t=
hat I=E2=80=99ve posted yesterday, was developed about 3 years ago, and I=
=E2=80=99ve not updated it since them. Actually from emails exchanged today=
, I discovered a couple of mistakes and also things that can be improved, s=
o if needed I can update it as well.
>
>
> Regards,
>
> Jordi
>
>
>
>
>
>
>
> De: v6ops <v6ops-bounces@ietf.org> en nombre de Lencse G=C3=A1bor <lencse=
@hit.bme.hu>
> Fecha: viernes, 15 de junio de 2018, 14:25
> Para: Fred Baker <fredbaker.ietf@gmail.com>
> CC: <v6ops@ietf.org>
> Asunto: [v6ops] Pros and Cons of IPv6 Transition Technologies for IPv4aaS=
 -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
>
>
>
> Dear Fred,
>
> Thank you very much for your invitation. I am willing to accept it, but I=
 would like to clarify your expectations before saying 'yes'.
>
> I have several questions.
>
> 1. Depth of the analysis
>
> - Basic level: well-known advantages and disadvantages, similarly as peop=
le wrote about MAP-T/E and 464XLAT, but also about DS-Lite and lw4o6.
> - Advanced level: basic level + security analysis using the methodology d=
efined in [1] + performance analysis according to RFC 8219.
>
> What depth do you recommend?
>
> 2. Method for getting the results and their publication
>
> As for the information for the basic level, I would prepare a google docs=
 table, fill in the information I have and send the link to the v6ops list =
asking contributions.
> After commenting and discussing, I would compile it to an I-D.
>
> Do you think that v6ops WG would finally agree to publish it as an RFC?
>
> As for the information for the advanced level, I would work together with=
 my students and PhD students, and publish our results first in academic pa=
pers and then include their most important lessons into the I-D.
>
> What do you think of it?
>
> 3. Timeline
>
> I think that I could put together the first table in a few weeks. The con=
tribution of the v6ops list members and the discussion could be done in a f=
ew months and then I could compile the results into an I-D in a few weeks. =
Perhaps, it could be presented at IETF 103.
>
> The further parts would require much more time and results could be inclu=
ded gradually in 1-2 years.
>
> 4. Scope
>
> The smallest natural scope includes the technologies for IPv4AAS, that is=
: 464XLAT, DS-Lite, MAP-T/E and lw4o6.
>
> IPv6 transition technologies for other carefully selected scenarios might=
 also be included. E.g. I have significant amount of results in benchmarkin=
g DNS64 servers, having a testing tool [2], a well defined methodology [3] =
and ready to use results concerning the DNS64 performance of BIND, PowerDNS=
 and Unbound [4].
> One of my PhD students is currently benchmarking some sateless NAT64 impl=
ementations according the the dual DUT setup of RFC 8219 using an RFC 2544 =
compatible Tester. Another PhD student is currently working on a RFC 8219 c=
ompliant NAT64 tester program (using DPDK) to be able to perform single DUT=
 setup NAT64 benchmarking tests.
>
> Thus, the scope can be widened, if you would like to.
>
> What do you think about my recommendations?
>
> Best regards,
>
> G=C3=A1bor
>
> References:
>
> [1] G. Lencse and Y. Kadobayashi, "Methodology for the identification of =
potential security issues of different IPv6 transition technologies: Threat=
 analysis of DNS64 and stateful NAT64", Computers & Security (Elsevier), vo=
l. 77, no. 1, pp. 397-411, August 1, 2018, DOI: 10.1016/j.cose.2018.04.012
>
> [2] G. Lencse, D. Bakai, "Design and implementation of a test program for=
 benchmarking DNS64 servers", IEICE Transactions on Communications, vol. E1=
00-B, no. 6. pp. 948-954, June 2017. DOI: 10.1587/transcom.2016EBN0007
>
> [3] G. Lencse, M. Georgescu, and Y. Kadobayashi, "Benchmarking Methodolog=
y for DNS64 Servers", Computer Communications (Elsevier), vol. 109, no. 1, =
pp. 162-175, September 1, 2017, DOI: 10.1016/j.comcom.2017.06.004
>
> [4] G. Lencse and Y. Kadobayashi, "Benchmarking DNS64 Implementations: Th=
eory and Practice", Computer Communications (Elsevier), vol. 127, no. 1, pp=
. 61-74, September 1, 2018, DOI: 10.1016/j.comcom.2018.05.005
>
> 6/14/2018 10:42 PM keltez=C3=A9ssel, Fred Baker =C3=ADrta:
>
>
>
> On Jun 14, 2018, at 1:15 PM, Lencse G=C3=A1bor <lencse@hit.bme.hu> wrote:
>
> I have an idea: perhaps you could add a section about the pros and cons o=
f each transition technology covered by the draft. (It could be helpful for=
 the network operators when selecting the technology matching their need th=
e best. However, I am not sure whether it is in the scope of this draft.)
>
> It would be incredibly useful. That said, it often involves value judgeme=
nts, which are essentially in the eye of the beholder.
>
>
>
> We have had a recent thread regarding 464xlat and MAP-T. If I can say thi=
s without actually putting words into Lorenzo's mouth, his issues with tran=
slation in general are probably summarized in RFC 2993, and I would agree w=
ith him. The distinction between 464xlat and MAP-T you'll have to find in h=
is emails; they are both services an ISP might deploy, and while they use t=
he same tool (translation) they are not the same service. It seems to be ge=
nerally agreed that MAP-T is more expensive to deploy than 464xlat; the que=
stion is what the extra expense buys, and whether someone agrees that the r=
esult is worth the cost.
>
>
>
> So in your proposed section, I would have to ask Jordi to not only say "M=
AP-T costs more to deploy than 464xlat", but gives the argument that might =
lead someone to choose MAP-T.
>
>
>
> And then we get to the large variety of other technologies, some of which=
 presume an IPv4 core network and some an IPv6 core network (and none of wh=
ich assume an MPLS core network carrying both kinds of traffic).
>
>
>
> If you would like to write such a document, please be my guest, by all me=
ans. But I'm not going to expect Jordi to do all that in the coming two wee=
ks...
>
>
> _______________________________________________ v6ops mailing list v6ops@=
ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>
>
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>
> This electronic message contains information which may be privileged or c=
onfidential. The information is intended to be for the exclusive use of the=
 individual(s) named above and further non-explicilty authorized disclosure=
, copying, distribution or use of the contents of this information, even if=
 partially, including attached files, is strictly prohibited and will be co=
nsidered a criminal offense. If you are not the intended recipient be aware=
 that any disclosure, copying, distribution or use of the contents of this =
information, even if partially, including attached files, is strictly prohi=
bited, will be considered a criminal offense, so you must reply to the orig=
inal sender to inform about this communication and delete it.
>
>
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>
>
>
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops
>
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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Subject: [v6ops] First Draft of V6OPS Meeting Agenda for IETF 102
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The provisional IETF meeting agenda is at:
https://datatracker.ietf.org/meeting/102/agenda.txt

I enclose a first draft of the meeting agenda for v6ops, if you note =
anything that you think should be added or updated please let the chairs =
know at "v6ops-chairs@ietf.org" <v6ops-chairs@ietf.org>".


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    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <title>IETF Working Group Agenda Analysis</title>
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  <body>
    <h3>IESG: Waiting for Writeup</h3>
    <ul>
      <li>2018-06-18	draft-ietf-v6ops-conditional-ras  <a href="https://datatracker.ietf.org/doc/draft-ietf-v6ops-conditional-ras">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-ietf-v6ops-conditional-ras">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-ietf-v6ops-conditional-ras-05.txt">(diffs)</a></li>
    </ul>

    <h3>WG: Updated WG Document</h3>
    <ul>
      <li>2018-06-15	draft-ietf-v6ops-transition-ipv4aas  <a href="https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-ietf-v6ops-transition-ipv4aas-03.txt">(diffs)</a></li>
      <li>2018-05-26	draft-ietf-v6ops-ipv6rtr-reqs  <a href="https://datatracker.ietf.org/doc/draft-ietf-v6ops-ipv6rtr-reqs">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-ietf-v6ops-ipv6rtr-reqs">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-ietf-v6ops-ipv6rtr-reqs-04.txt">(diffs)</a></li>
    </ul>

    <h3>Individual Submission: Updated </h3>
    <ul>
      <li>2018-06-14	draft-templin-v6ops-pdhost  <a href="https://datatracker.ietf.org/doc/draft-templin-v6ops-pdhost">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-templin-v6ops-pdhost">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-templin-v6ops-pdhost-21.txt">(diffs)</a></li>
      <li>2018-06-05	draft-fioccola-v6ops-ipv6-alt-mark  <a href="https://datatracker.ietf.org/doc/draft-fioccola-v6ops-ipv6-alt-mark">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-fioccola-v6ops-ipv6-alt-mark">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-fioccola-v6ops-ipv6-alt-mark-01.txt">(diffs)</a></li>
      <li>2018-05-29	draft-palet-v6ops-nat64-deployment  <a href="https://datatracker.ietf.org/doc/draft-palet-v6ops-nat64-deployment">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-palet-v6ops-nat64-deployment">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-palet-v6ops-nat64-deployment-01.txt">(diffs)</a></li>
      <li>2018-05-29	draft-palet-v6ops-p2p-links  <a href="https://datatracker.ietf.org/doc/draft-palet-v6ops-p2p-links">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-palet-v6ops-p2p-links">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-palet-v6ops-p2p-links-02.txt">(diffs)</a></li>
      <li>2018-04-18	draft-shytyi-v6ops-danir  <a href="https://datatracker.ietf.org/doc/draft-shytyi-v6ops-danir">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-shytyi-v6ops-danir">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-shytyi-v6ops-danir-01.txt">(diffs)</a></li>
    </ul>

    <p>Tue Jun 19 06:04:41 2018</p>
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And of course I sent the wrong file. Agenda-v6ops.html tells us what =
drafts are posted and possible to include. The actual proposed agenda is =
v6ops-102.html. My apologies.

The provisional IETF meeting agenda is at:
https://datatracker.ietf.org/meeting/102/agenda.txt

I enclose a first draft of the meeting agenda for v6ops, if you note =
anything that you think should be added or updated please let the chairs =
know at "v6ops-chairs@ietf.org" <v6ops-chairs@ietf.org>".


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    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <title>IETF Working Group Agenda Analysis</title>
  </head>
  <body>
    <h3>IESG: Waiting for Writeup</h3>
    <ul>
      <li>2018-06-18	draft-ietf-v6ops-conditional-ras  <a href="https://datatracker.ietf.org/doc/draft-ietf-v6ops-conditional-ras">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-ietf-v6ops-conditional-ras">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-ietf-v6ops-conditional-ras-05.txt">(diffs)</a></li>
    </ul>

    <h3>WG: Updated WG Document</h3>
    <ul>
      <li>2018-06-15	draft-ietf-v6ops-transition-ipv4aas  <a href="https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-ietf-v6ops-transition-ipv4aas-03.txt">(diffs)</a></li>
      <li>2018-05-26	draft-ietf-v6ops-ipv6rtr-reqs  <a href="https://datatracker.ietf.org/doc/draft-ietf-v6ops-ipv6rtr-reqs">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-ietf-v6ops-ipv6rtr-reqs">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-ietf-v6ops-ipv6rtr-reqs-04.txt">(diffs)</a></li>
    </ul>

    <h3>Individual Submission: Updated </h3>
    <ul>
      <li>2018-06-14	draft-templin-v6ops-pdhost  <a href="https://datatracker.ietf.org/doc/draft-templin-v6ops-pdhost">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-templin-v6ops-pdhost">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-templin-v6ops-pdhost-21.txt">(diffs)</a></li>
      <li>2018-06-05	draft-fioccola-v6ops-ipv6-alt-mark  <a href="https://datatracker.ietf.org/doc/draft-fioccola-v6ops-ipv6-alt-mark">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-fioccola-v6ops-ipv6-alt-mark">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-fioccola-v6ops-ipv6-alt-mark-01.txt">(diffs)</a></li>
      <li>2018-05-29	draft-palet-v6ops-nat64-deployment  <a href="https://datatracker.ietf.org/doc/draft-palet-v6ops-nat64-deployment">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-palet-v6ops-nat64-deployment">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-palet-v6ops-nat64-deployment-01.txt">(diffs)</a></li>
      <li>2018-05-29	draft-palet-v6ops-p2p-links  <a href="https://datatracker.ietf.org/doc/draft-palet-v6ops-p2p-links">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-palet-v6ops-p2p-links">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-palet-v6ops-p2p-links-02.txt">(diffs)</a></li>
      <li>2018-04-18	draft-shytyi-v6ops-danir  <a href="https://datatracker.ietf.org/doc/draft-shytyi-v6ops-danir">(tracker)</a>  <a href="https://tools.ietf.org/html/draft-shytyi-v6ops-danir">(HTML)</a>  <a href="https://tools.ietf.org/rfcdiff?url2=draft-shytyi-v6ops-danir-01.txt">(diffs)</a></li>
    </ul>

    <p>Tue Jun 19 06:04:41 2018</p>
  </body>
</html>

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    <meta http-equiv="content-type" content="text/html;
      charset=windows-1252">
    <title>IPv6 Operations - IETF 102</title>
    <style type="text/css">
.indented
   {
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  </head>
  <body>
    <h2> IPv6 Operations - IETF 102 </h2>
    <div class="indented">
      <dl>
        <dt><b>World IPv6 Trends</b> </dt>
        <dd>George Michaelson, APNIC </dd>
        <!-- Agenda item 1 --> <dt><a
            href="https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas">
            <b>Requirements for IPv6 Customer Edge Routers to Support
              IPv4 Connectivity as-a-Service</b></a></dt>
        <dd> 2018-06-13, &lt;draft-ietf-v6ops-transition-ipv4aas&gt;</dd>
        <!-- Agenda item 2 --> <dt><a
            href="https://tools.ietf.org/html/draft-ietf-v6ops-ipv6rtr-reqs">
            <b>Requirements for IPv6 Routers</b></a></dt>
        <dd> 2018-05-26 , &lt;draft-ietf-v6ops-ipv6rtr-reqs&gt;</dd>
        <!-- Agenda item 3 --> <dt><a
            href="https://tools.ietf.org/html/draft-templin-v6ops-pdhost">
            <b>Multi-Addressing Considerations for IPv6 Prefix
              Delegation</b></a></dt>
        <dd> 2018-06-14, &lt;draft-templin-v6ops-pdhost&gt;</dd>
	<!-- Agenda item 4 -->
<dt><a href="https://tools.ietf.org/html/draft-patterson-intarea-ipoe-health">
	<b>IPoE Client Health Checking</b></a></dt>
<dd>   2018-06-12 , &lt;draft-patterson-intarea-ipoe-health&gt;</dd>

      </dl>
    </div>
    <h3> Draft Status </h3>
    <p> The status of v6ops drafts, both working group drafts
      (draft-ietf-v6ops-*) and individual submissions to the working
      group (draft-&lt;author&gt;-v6ops-*), may be determined from <a
href="https://datatracker.ietf.org/doc/search/?sort=status&amp;activedrafts=on&amp;name=v6ops&amp;rfcs=on">
        https://datatracker.ietf.org/wg/v6ops/</a>. </p>
  </body>
</html>

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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt
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Hi Med,



Responding below, in-line.



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: <mohamed.boucadair@orange.com>

Fecha: martes, 19 de junio de 2018, 7:41

Para: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>

CC: "v6ops@ietf.org" <v6ops@ietf.org>

Asunto: RE: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt



    Hi Jordi,=20

   =20

    Please see inline.=20

   =20

    Cheers,

    Med

   =20

    > -----Message d'origine-----

    > De : JORDI PALET MARTINEZ [mailto:jordi.palet@consulintel.es]

    > Envoy=C3=A9 : lundi 18 juin 2018 19:05

    > =C3=80 : BOUCADAIR Mohamed IMT/OLN

    > Cc : v6ops@ietf.org

    > Objet : Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-0=
3.txt

    >=20

    > Hi Med,

    >=20

    >=20

    >=20

    > Thanks a lot for your inputs.

    >=20

    >=20

    >=20

    > I've few comments:

    >=20

    > 1) The requirements language is the same as it was used in RFC7084. W=
e

    > believe it makes a lot of sense to follow that.

    >=20

   =20

    [Med] My comment was about "Unlike other IETF documents,". As you menti=
oned, the core text is also in 7084 which is an IETF document! Please consi=
der deleting that mention.=20





I see now what you mean. Keeping only:



1.1.  Requirements Language - Special Note



   The key words "MUST", "MUST NOT",

   "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT",

   "RECOMMENDED", "MAY", and "OPTIONAL" in this document are not used as

   described in RFC 2119 [RFC2119].  This document uses these keywords

   not strictly for the purpose of interoperability, but rather for the

   purpose of establishing industry-common baseline functionality.  As

   such, the document points to several other specifications to provide

   additional guidance to implementers regarding any protocol

   implementation required to produce a successful IPv6 Transition CE

   Router that interoperates successfully with a particular subset of

   currently deploying and planned common IPv6-only access networks.



I've also added (from RFC6092):



   Additionally, the key word "DEFAULT" is to be interpreted in this

   document as pertaining to a configuration as applied by a vendor,

   prior to the administrator changing it for its initial activation.



And changed in the document a couple of usages of default to DEFAULT, so it=
 is more "visible".

   =20

    >=20

    >=20

    > 2) Some of the comments are related to the usage of expressions such =
as

    > services vs servers, transition vs service continuity, etc. The autho=
rs

    > consider that it is good to use those interchangeable wordings, becau=
se for

    > example, if we don't mention transition, a reader may be confused

    > understanding that this is not regarding transition but a new problem

    > "service continuity". Anyway, we will take a look again into this, an=
d also

    > seek for other comments from the WG.

    >=20

    >=20

    >=20

    > 3) Will clarify anything that doesn't parse easily from your inputs.

    >=20

    >=20

    >=20

    > 4) You're right regarding the numbering of new General and LAN requir=
ements,

    > there is no reason now to follow the numbering of RFC7084, we will st=
art from

    > 1.

    >=20

    >=20

    >=20

    > 5) We believe that it makes sense that in the DEFAULT config, accordi=
ng with

    > the discussion in the list, transition is disabled, so we avoid possi=
ble

    > conflicts, unless the ISP turns it on (following RFC8026) or the user=
 (by

    > means of GUI or CLI).

   =20

    [Med] RFC8026 assumes that corresponding options are requested. If a me=
chanism is disabled, I assume the corresponding DHCP option won't be includ=
ed in the request to the server. TRANS-1 is problematic.

   =20

    I still don't understand the expected behavior.





Ok, I understand now your point and I believe we have both in mind the same=
 behavior, but the text is not clear.



What we want is that:

1) The corresponding options for each supported transition mechanism are re=
quested.

2) However, the mechanism is DISABLED at the time being (no packets forward=
ed yet, no routing entries, etc.).

3) Until the RFC8026 mechanisms decides which ones should be actually ENABL=
ED.

4) Then the CE ENABLE those (and configures routing, starts forwarding, etc=
.).



At this way, if the ISP doesn't support *any* or don't want the CE to enabl=
e any, will be able to do it.



So, an alternative wording to clarify this:



TRANS-1:  All the supported transition mechanisms MUST be configured by

              DEFAULT by the IPv6 Transition CE Router via the relevant opt=
ions=20

	for each one, however they MUST be disabled until

	by means of TRANS-4, decides which ones are enabled/disabled.



and



TRANS-4:  The IPv6 Transition CE Router, following Section 1.4 of

             [RFC8026], MUST check for a valid match in

             OPTION_S46_PRIORITY, which will allow enabling/disabling

	each transition mechanism.



Also, maybe is better to change the order of the TRANS requirements so thos=
e two are following each other.



   =20

    >=20

    >=20

    >=20

    > 6) The code considerations section was requested in v6ops to be keep =
as part

    > of the document, not an annex. We are happy to change that again if t=
hat's

    > the WG decision.

    >=20

    >=20

    >=20

    > We will wait a few extra days for any further inputs before submittin=
g a new

    > version (before the cut-off).

    >=20

    >=20

    >=20

    > Thanks !

    >=20

    >=20

    >=20

    > Regards,

    >=20

    > Jordi

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    > =EF=BB=BF-----Mensaje original-----

    >=20

    > De: v6ops <v6ops-bounces@ietf.org> en nombre de

    > <mohamed.boucadair@orange.com>

    >=20

    > Fecha: lunes, 18 de junio de 2018, 14:27

    >=20

    > Para: JORDI PALET MARTINEZ <jordi.palet=3D40consulintel.es@dmarc.ietf=
.org>

    >=20

    > CC: "v6ops@ietf.org" <v6ops@ietf.org>

    >=20

    > Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-0=
3.txt

    >=20

    >=20

    >=20

    >     Hi Jordi,

    >=20

    >=20

    >=20

    >     FWIW, please find some comments to this draft at:

    >=20

    >=20

    >=20

    >     pdf: https://github.com/boucadair/IETF-Drafts-Reviews/blob/master=
/draft-

    > ietf-v6ops-transition-ipv4aas-03-rev%20Med.pdf

    >=20

    >     doc: https://github.com/boucadair/IETF-Drafts-Reviews/raw/master/=
draft-

    > ietf-v6ops-transition-ipv4aas-03-rev%20Med.doc

    >=20

    >=20

    >=20

    >     Cheers,

    >=20

    >     Med

    >=20

    >=20

    >=20

    >     > -----Message d'origine-----

    >=20

    >     > De : v6ops [mailto:v6ops-bounces@ietf.org] De la part de JORDI =
PALET

    > MARTINEZ

    >=20

    >     > Envoy=C3=A9 : samedi 16 juin 2018 08:57

    >=20

    >     > =C3=80 : v6ops@ietf.org

    >=20

    >     > Objet : Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv=
4aas-

    > 03.txt

    >=20

    >     >

    >=20

    >     > Hi all,

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > As indicated a couple of day ago, we have updated this document=
, so

    > instead

    >=20

    >     > of an update of RFC8026 and a new option code, we only need to =
ask IANA

    > to

    >=20

    >     > use a NAT64 existing one for the RFC8026 priority table.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-

    >=20

    >     > ipv4aas/?include_text=3D1

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > Let's know any comments you have.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > Thanks!

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > Regards,

    >=20

    >     >

    >=20

    >     > Jordi

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > =EF=BB=BF-----Mensaje original-----

    >=20

    >     >

    >=20

    >     > De: v6ops <v6ops-bounces@ietf.org> en nombre de <internet-

    > drafts@ietf.org>

    >=20

    >     >

    >=20

    >     > Fecha: s=C3=A1bado, 16 de junio de 2018, 8:43

    >=20

    >     >

    >=20

    >     > Para: <i-d-announce@ietf.org>

    >=20

    >     >

    >=20

    >     > CC: <v6ops@ietf.org>

    >=20

    >     >

    >=20

    >     > Asunto: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas=
-03.txt

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     A New Internet-Draft is available from the on-line Internet=
-Drafts

    >=20

    >     > directories.

    >=20

    >     >

    >=20

    >     >     This draft is a work item of the IPv6 Operations WG of the =
IETF.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >             Title           : Requirements for IPv6 Customer Ed=
ge

    > Routers to

    >=20

    >     > Support IPv4 Connectivity as-a-Service

    >=20

    >     >

    >=20

    >     >             Authors         : Jordi Palet Martinez

    >=20

    >     >

    >=20

    >     >                               Hans M.-H. Liu

    >=20

    >     >

    >=20

    >     >                               Masanobu Kawashima

    >=20

    >     >

    >=20

    >     >     	Filename        : draft-ietf-v6ops-transition-ipv4aas-03.t=
xt

    >=20

    >     >

    >=20

    >     >     	Pages           : 20

    >=20

    >     >

    >=20

    >     >     	Date            : 2018-06-15

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     Abstract:

    >=20

    >     >

    >=20

    >     >        This document specifies the IPv4 service continuity requ=
irements

    > for

    >=20

    >     >

    >=20

    >     >        an IPv6 Customer Edge (CE) router, either provided by th=
e

    > service

    >=20

    >     >

    >=20

    >     >        provider or thru the retail market.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >        Specifically, this document extends the "Basic Requireme=
nts for

    > IPv6

    >=20

    >     >

    >=20

    >     >        Customer Edge Routers" in order to allow the provisionin=
g of

    > IPv6

    >=20

    >     >

    >=20

    >     >        transition services for the support of "IPv4 as-a-Servic=
e"

    > (IPv4aaS)

    >=20

    >     >

    >=20

    >     >        by means of new transition mechanisms.  The document onl=
y covers

    >=20

    >     >

    >=20

    >     >        transition technologies for delivering IPv4 in IPv6-only=
 access

    >=20

    >     >

    >=20

    >     >        networks, commonly called "IPv4 as-a-Service" (IPv4aaS),=
 as

    > required

    >=20

    >     >

    >=20

    >     >        in a world where IPv4 addresses are no longer available,=
 so

    > hosts in

    >=20

    >     >

    >=20

    >     >        the customer LANs with IPv4-only or IPv6-only applicatio=
ns or

    >=20

    >     >

    >=20

    >     >        devices, requiring to communicate with IPv4-only service=
s at the

    >=20

    >     >

    >=20

    >     >        Internet, are still able to do so.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     The IETF datatracker status page for this draft is:

    >=20

    >     >

    >=20

    >     >     https://datatracker.ietf.org/doc/draft-ietf-v6ops-transitio=
n-

    > ipv4aas/

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     There are also htmlized versions available at:

    >=20

    >     >

    >=20

    >     >     https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv=
4aas-03

    >=20

    >     >

    >=20

    >     >     https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-tran=
sition-

    >=20

    >     > ipv4aas-03

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     A diff from the previous version is available at:

    >=20

    >     >

    >=20

    >     >     https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-v6ops-transi=
tion-

    > ipv4aas-03

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     Please note that it may take a couple of minutes from the t=
ime of

    >=20

    >     > submission

    >=20

    >     >

    >=20

    >     >     until the htmlized version and diff are available at

    > tools.ietf.org.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     Internet-Drafts are also available by anonymous FTP at:

    >=20

    >     >

    >=20

    >     >     ftp://ftp.ietf.org/internet-drafts/

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     _______________________________________________

    >=20

    >     >

    >=20

    >     >     v6ops mailing list

    >=20

    >     >

    >=20

    >     >     v6ops@ietf.org

    >=20

    >     >

    >=20

    >     >     https://www.ietf.org/mailman/listinfo/v6ops

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > **********************************************

    >=20

    >     > IPv4 is over

    >=20

    >     > Are you ready for the new Internet ?

    >=20

    >     > http://www.consulintel.es

    >=20

    >     > The IPv6 Company

    >=20

    >     >

    >=20

    >     > This electronic message contains information which may be privi=
leged or

    >=20

    >     > confidential. The information is intended to be for the exclusi=
ve use

    > of the

    >=20

    >     > individual(s) named above and further non-explicilty authorized

    > disclosure,

    >=20

    >     > copying, distribution or use of the contents of this informatio=
n, even

    > if

    >=20

    >     > partially, including attached files, is strictly prohibited and=
 will be

    >=20

    >     > considered a criminal offense. If you are not the intended reci=
pient be

    > aware

    >=20

    >     > that any disclosure, copying, distribution or use of the conten=
ts of

    > this

    >=20

    >     > information, even if partially, including attached files, is st=
rictly

    >=20

    >     > prohibited, will be considered a criminal offense, so you must =
reply to

    > the

    >=20

    >     > original sender to inform about this communication and delete i=
t.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > _______________________________________________

    >=20

    >     > v6ops mailing list

    >=20

    >     > v6ops@ietf.org

    >=20

    >     > https://www.ietf.org/mailman/listinfo/v6ops

    >=20

    >     _______________________________________________

    >=20

    >     v6ops mailing list

    >=20

    >     v6ops@ietf.org

    >=20

    >     https://www.ietf.org/mailman/listinfo/v6ops

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    > **********************************************

    > IPv4 is over

    > Are you ready for the new Internet ?

    > http://www.consulintel.es

    > The IPv6 Company

    >=20

    > This electronic message contains information which may be privileged =
or

    > confidential. The information is intended to be for the exclusive use=
 of the

    > individual(s) named above and further non-explicilty authorized discl=
osure,

    > copying, distribution or use of the contents of this information, eve=
n if

    > partially, including attached files, is strictly prohibited and will =
be

    > considered a criminal offense. If you are not the intended recipient =
be aware

    > that any disclosure, copying, distribution or use of the contents of =
this

    > information, even if partially, including attached files, is strictly

    > prohibited, will be considered a criminal offense, so you must reply =
to the

    > original sender to inform about this communication and delete it.

    >=20

    >=20

   =20

   =20




**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.




From nobody Tue Jun 19 09:15:45 2018
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From: Richard Patterson <richard@helix.net.nz>
Date: Tue, 19 Jun 2018 17:15:27 +0100
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To: "v6ops@ietf.org list" <v6ops@ietf.org>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/qDpfNrimFosC_V1sNbIaLBEJw0M>
Subject: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-02.txt
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Thanks for the comments on and off the v6ops list, we've published a
new version of draft-patterson-intarea-ipoe-health.
The major changes can summarised as:
 - Emphasised preference for use of BFD echo as the health check mechanism.
 - Removed lifetime expiration from Behaviour 2 and clarified usage.
 - Updated Behaviour 3 with instructions for whilst mid-renew/rebind.
 - Reworded multihoming section.
 - Added Acknowledgements.

Please continue providing feedback, and if anyone has a relationship
with DHCP client developers, or CPE vendors, we'd love to start a
dialogue there too.

-Richard


=EF=BB=BFOn 19/06/2018, 17:07, "internet-drafts@ietf.org"
<internet-drafts@ietf.org> wrote:


    A new version of I-D, draft-patterson-intarea-ipoe-health-02.txt
    has been successfully submitted by Richard Patterson and posted to the
    IETF repository.

    Name:draft-patterson-intarea-ipoe-health
    Revision:02
    Title:IPoE Client Health Checking
    Document date:2018-06-19
    Group:Individual Submission
    Pages:13
    URL:
https://www.ietf.org/internet-drafts/draft-patterson-intarea-ipoe-health-02=
.txt
    Status:
https://datatracker.ietf.org/doc/draft-patterson-intarea-ipoe-health/
    Htmlized:
https://tools.ietf.org/html/draft-patterson-intarea-ipoe-health-02
    Htmlized:
https://datatracker.ietf.org/doc/html/draft-patterson-intarea-ipoe-health
    Diff:
https://www.ietf.org/rfcdiff?url2=3Ddraft-patterson-intarea-ipoe-health-02

    Abstract:
       PPP over Ethernet clients have the functionality to detect path
       unavailability by using PPP Keepalives.  IP over Ethernet does not
       have this functionality, and it's not specified when an IP over
       Ethernet client should consider its WAN connectivity down, unless
       there is a physical layer link down event.

       This document describes a way for IP over Ethernet clients to achiev=
e
       connectivity validation, similar to that of PPP over Ethernet, by
       using BFD Echo, or ARP and Neighbor Discovery functions.




    Please note that it may take a couple of minutes from the time of submi=
ssion
    until the htmlized version and diff are available at tools.ietf.org.

    The IETF Secretariat


From nobody Tue Jun 19 09:40:50 2018
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From: "Mudric, Dusan (Dusan)" <dmudric@avaya.com>
To: Richard Patterson <richard@helix.net.nz>, "v6ops@ietf.org list" <v6ops@ietf.org>
Thread-Topic: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-02.txt
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Subject: Re: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-02.txt
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Subject: Re: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-02.txt
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Hi Dusan,

Thanks again for your comments.  I'll answer in-line below:

On Tue, 19 Jun 2018 at 17:40, Mudric, Dusan (Dusan) <dmudric@avaya.com> wro=
te:
> -       What is the behavior for =E2=80=9CIf the IPoE client is already i=
n the renew or rebind state when Behaviour 2 is triggered=E2=80=9D? Should =
it be the same as Behavior 3?

This is less of a concern than Behaviour 3, as Behaviour 2 does not
send a release.  However I can include wording to allow any ongoing
renew and rebind attempts to complete.  Would that sufficiently cover
it do you think?

> -       SHOULD the client use RAPID COMMIT option for Behaviors 2 and 3?

We could add a "MAY use Rapid Commit", I'm just not sure if it's
required, as it's already covered in RFC3315, Section 22.14.
Perhaps adding a lowercase "may use rapid commit to expedite the
recovery process" guidance as opposed to a requirement.  What do you
think?

> -       Missing a diagram for the problem statement: Can you show please,=
 using a simple diagram, how DHCPv6 lease  becomes stale?
> -       Provide diagrams for all options, showing how a client recovers a=
fter an edge router outage. For example, if 3.3 ND NUD finds the edge route=
r is unreachable, show the benefits of RENEW and SOLICIT options and how th=
e client will communicate to off-link destinations using the old or a new D=
HCPv6 address.
> -       Provide a diagram showing how a router outage between a Relay Age=
nt and ISP can be detected (i.e. RA from the edge router) and how the clien=
t can recover connectivity to off-link destinations.

I'll have a think about how best to depict these scenarios and get
back to you with some suggestions.

-Richard


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From: "Mudric, Dusan (Dusan)" <dmudric@avaya.com>
To: Richard Patterson <richard@helix.net.nz>
CC: "v6ops@ietf.org list" <v6ops@ietf.org>
Thread-Topic: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-02.txt
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Date: Tue, 19 Jun 2018 20:10:17 +0000
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Subject: Re: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-02.txt
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Date: Wed, 20 Jun 2018 10:15:39 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: <mohamed.boucadair@orange.com>
CC: "v6ops@ietf.org" <v6ops@ietf.org>
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Thread-Topic: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt
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Hi Med,



Thanks again!



Here is what I think we are converging:



TRANS-1:  The IPv6 Transition CE Router MUST support the DHCPv6 S46

             priority options described in [RFC8026] (Unified IPv4-in-

             IPv6 Softwire Customer Premises Equipment (CPE): A

             DHCPv6-Based Prioritization Mechanism).



TRANS-2:  The IPv6 Transition CE Router MUST have a GUI and/or CLI

             option to manually enable/disable each of the supported

             transition mechanisms.



TRANS-3:  The IPv6 Transition CE Router MUST request the relevant

             configuration options for each supported transition

             mechanisms, which MUST remain disabled at this step.



TRANS-4:  The IPv6 Transition CE Router, following Section 1.4 of

             [RFC8026], MUST check for a valid match in

             OPTION_S46_PRIORITY, which will allow enabling a transition

             mechanism.



TRANS-5:  In order to allow the service provider to disable all the

             transition mechanisms, the IPv6 Transition CE Router MUST

             NOT enable any transition mechanisms if no match is found

             between the priority list and the candidate list.





", which MUST remain disabled at this step" in TRANS-3 is needed to make su=
re that none of them are enabled before RFC8026 rules are followed. Accordi=
ng to the conversation in this list, some people was not clear that RFC8026=
 allows enabling or not a given transition mechanism, so this way we state =
it without doubts.



TRANS-5 is required because RFC8026 has a "MAY" if no match is found or the=
re is an invalid option. In this case, we want to make sure that "no match"=
 from an ISP means "I don't want any mechanism to be turned on".



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: <mohamed.boucadair@orange.com>

Fecha: mi=C3=A9rcoles, 20 de junio de 2018, 8:43

Para: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>

CC: "v6ops@ietf.org" <v6ops@ietf.org>

Asunto: RE: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-03.txt



    Hi Jordi,=20

   =20

    Please see inline.=20

   =20

    Cheers,

    Med

   =20

    > -----Message d'origine-----

    > De : JORDI PALET MARTINEZ [mailto:jordi.palet@consulintel.es]

    > Envoy=C3=A9 : mardi 19 juin 2018 13:40

    > =C3=80 : BOUCADAIR Mohamed IMT/OLN

    > Cc : v6ops@ietf.org

    > Objet : Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-0=
3.txt

    >=20

    > Hi Med,

    >=20

    >=20

    >=20

    > Responding below, in-line.

    >=20

    >=20

    >=20

    > Regards,

    >=20

    > Jordi

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    > =EF=BB=BF-----Mensaje original-----

    >=20

    > De: <mohamed.boucadair@orange.com>

    >=20

    > Fecha: martes, 19 de junio de 2018, 7:41

    >=20

    > Para: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>

    >=20

    > CC: "v6ops@ietf.org" <v6ops@ietf.org>

    >=20

    > Asunto: RE: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-0=
3.txt

    >=20

    >=20

    >=20

    >     Hi Jordi,

    >=20

    >=20

    >=20

    >     Please see inline.

    >=20

    >=20

    >=20

    >     Cheers,

    >=20

    >     Med

    >=20

    >=20

    >=20

    >     > -----Message d'origine-----

    >=20

    >     > De : JORDI PALET MARTINEZ [mailto:jordi.palet@consulintel.es]

    >=20

    >     > Envoy=C3=A9 : lundi 18 juin 2018 19:05

    >=20

    >     > =C3=80 : BOUCADAIR Mohamed IMT/OLN

    >=20

    >     > Cc : v6ops@ietf.org

    >=20

    >     > Objet : Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv=
4aas-

    > 03.txt

    >=20

    >     >

    >=20

    >     > Hi Med,

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > Thanks a lot for your inputs.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > I've few comments:

    >=20

    >     >

    >=20

    >     > 1) The requirements language is the same as it was used in RFC7=
084. We

    >=20

    >     > believe it makes a lot of sense to follow that.

    >=20

    >     >

    >=20

    >=20

    >=20

    >     [Med] My comment was about "Unlike other IETF documents,". As you

    > mentioned, the core text is also in 7084 which is an IETF document! P=
lease

    > consider deleting that mention.

    >=20

    >=20

    >=20

    >=20

    >=20

    > I see now what you mean. Keeping only:

    >=20

    >=20

    >=20

    > 1.1.  Requirements Language - Special Note

    >=20

    >=20

    >=20

    >    The key words "MUST", "MUST NOT",

    >=20

    >    "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT",

    >=20

    >    "RECOMMENDED", "MAY", and "OPTIONAL" in this document are not used=
 as

    >=20

    >    described in RFC 2119 [RFC2119].  This document uses these keyword=
s

    >=20

    >    not strictly for the purpose of interoperability, but rather for t=
he

    >=20

    >    purpose of establishing industry-common baseline functionality.  A=
s

    >=20

    >    such, the document points to several other specifications to provi=
de

    >=20

    >    additional guidance to implementers regarding any protocol

    >=20

    >    implementation required to produce a successful IPv6 Transition CE

    >=20

    >    Router that interoperates successfully with a particular subset of

    >=20

    >    currently deploying and planned common IPv6-only access networks.

    >=20

    >=20

    >=20

    > I've also added (from RFC6092):

    >=20

    >=20

    >=20

    >    Additionally, the key word "DEFAULT" is to be interpreted in this

    >=20

    >    document as pertaining to a configuration as applied by a vendor,

    >=20

    >    prior to the administrator changing it for its initial activation.

    >=20

    >=20

    >=20

    > And changed in the document a couple of usages of default to DEFAULT,=
 so it

    > is more "visible".

    >=20

    >=20

   =20

    [Med] OK.=20

   =20

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > 2) Some of the comments are related to the usage of expressions=
 such as

    >=20

    >     > services vs servers, transition vs service continuity, etc. The=
 authors

    >=20

    >     > consider that it is good to use those interchangeable wordings,=
 because

    > for

    >=20

    >     > example, if we don't mention transition, a reader may be confus=
ed

    >=20

    >     > understanding that this is not regarding transition but a new p=
roblem

    >=20

    >     > "service continuity". Anyway, we will take a look again into th=
is, and

    > also

    >=20

    >     > seek for other comments from the WG.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > 3) Will clarify anything that doesn't parse easily from your in=
puts.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > 4) You're right regarding the numbering of new General and LAN

    > requirements,

    >=20

    >     > there is no reason now to follow the numbering of RFC7084, we w=
ill

    > start from

    >=20

    >     > 1.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > 5) We believe that it makes sense that in the DEFAULT config, a=
ccording

    > with

    >=20

    >     > the discussion in the list, transition is disabled, so we avoid

    > possible

    >=20

    >     > conflicts, unless the ISP turns it on (following RFC8026) or th=
e user

    > (by

    >=20

    >     > means of GUI or CLI).

    >=20

    >=20

    >=20

    >     [Med] RFC8026 assumes that corresponding options are requested. I=
f a

    > mechanism is disabled, I assume the corresponding DHCP option won't b=
e

    > included in the request to the server. TRANS-1 is problematic.

    >=20

    >=20

    >=20

    >     I still don't understand the expected behavior.

    >=20

    >=20

    >=20

    >=20

    >=20

    > Ok, I understand now your point and I believe we have both in mind th=
e same

    > behavior, but the text is not clear.

    >=20

    >=20

    >=20

    > What we want is that:

    >=20

    > 1) The corresponding options for each supported transition mechanism =
are

    > requested.

    >=20

    > 2) However, the mechanism is DISABLED at the time being (no packets f=
orwarded

    > yet, no routing entries, etc.).

   =20

    [Med] I would omit this step because this is the job of 8026.

   =20

    >=20

    > 3) Until the RFC8026 mechanisms decides which ones should be actually

    > ENABLED.

    >=20

    > 4) Then the CE ENABLE those (and configures routing, starts forwardin=
g,

    > etc.).

    >=20

    >=20

    >=20

    > At this way, if the ISP doesn't support *any* or don't want the CE to=
 enable

    > any, will be able to do it.

    >=20

    >=20

    >=20

    > So, an alternative wording to clarify this:

    >=20

    >=20

    >=20

    > TRANS-1:  All the supported transition mechanisms MUST be configured =
by

    >=20

    >               DEFAULT by the IPv6 Transition CE Router via the releva=
nt

    > options

    >=20

    > 	for each one, however they MUST be disabled until

    >=20

    > 	by means of TRANS-4, decides which ones are enabled/disabled.

    >=20

    >=20

   =20

    [Med] Why not simply saying: The CE MUST request the relevant configura=
tion option for each of supported mechanism.=20

   =20

    >=20

    > and

    >=20

    >=20

    >=20

    > TRANS-4:  The IPv6 Transition CE Router, following Section 1.4 of

    >=20

    >              [RFC8026], MUST check for a valid match in

    >=20

    >              OPTION_S46_PRIORITY, which will allow enabling/disabling

    >=20

    > 	each transition mechanism.

    >=20

   =20

    [Med] OK.

   =20

    >=20

    >=20

    > Also, maybe is better to change the order of the TRANS requirements s=
o those

    > two are following each other.

    >=20

   =20

    [Med] I would use this order: TRANS-3, TRANS-1, then TRANS-4.

   =20

    >=20

    >=20

    >=20

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > 6) The code considerations section was requested in v6ops to be=
 keep as

    > part

    >=20

    >     > of the document, not an annex. We are happy to change that agai=
n if

    > that's

    >=20

    >     > the WG decision.

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > We will wait a few extra days for any further inputs before sub=
mitting

    > a new

    >=20

    >     > version (before the cut-off).

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > Thanks !

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > Regards,

    >=20

    >     >

    >=20

    >     > Jordi

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > =EF=BB=BF-----Mensaje original-----

    >=20

    >     >

    >=20

    >     > De: v6ops <v6ops-bounces@ietf.org> en nombre de

    >=20

    >     > <mohamed.boucadair@orange.com>

    >=20

    >     >

    >=20

    >     > Fecha: lunes, 18 de junio de 2018, 14:27

    >=20

    >     >

    >=20

    >     > Para: JORDI PALET MARTINEZ

    > <jordi.palet=3D40consulintel.es@dmarc.ietf.org>

    >=20

    >     >

    >=20

    >     > CC: "v6ops@ietf.org" <v6ops@ietf.org>

    >=20

    >     >

    >=20

    >     > Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv=
4aas-

    > 03.txt

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     Hi Jordi,

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     FWIW, please find some comments to this draft at:

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     pdf: https://github.com/boucadair/IETF-Drafts-

    > Reviews/blob/master/draft-

    >=20

    >     > ietf-v6ops-transition-ipv4aas-03-rev%20Med.pdf

    >=20

    >     >

    >=20

    >     >     doc: https://github.com/boucadair/IETF-Drafts-

    > Reviews/raw/master/draft-

    >=20

    >     > ietf-v6ops-transition-ipv4aas-03-rev%20Med.doc

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     Cheers,

    >=20

    >     >

    >=20

    >     >     Med

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >     > -----Message d'origine-----

    >=20

    >     >

    >=20

    >     >     > De : v6ops [mailto:v6ops-bounces@ietf.org] De la part de =
JORDI

    > PALET

    >=20

    >     > MARTINEZ

    >=20

    >     >

    >=20

    >     >     > Envoy=C3=A9 : samedi 16 juin 2018 08:57

    >=20

    >     >

    >=20

    >     >     > =C3=80 : v6ops@ietf.org

    >=20

    >     >

    >=20

    >     >     > Objet : Re: [v6ops] I-D Action: draft-ietf-v6ops-transiti=
on-

    > ipv4aas-

    >=20

    >     > 03.txt

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > Hi all,

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > As indicated a couple of day ago, we have updated this do=
cument,

    > so

    >=20

    >     > instead

    >=20

    >     >

    >=20

    >     >     > of an update of RFC8026 and a new option code, we only ne=
ed to

    > ask IANA

    >=20

    >     > to

    >=20

    >     >

    >=20

    >     >     > use a NAT64 existing one for the RFC8026 priority table.

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > https://datatracker.ietf.org/doc/draft-ietf-v6ops-transit=
ion-

    >=20

    >     >

    >=20

    >     >     > ipv4aas/?include_text=3D1

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > Let's know any comments you have.

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > Thanks!

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > Regards,

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > Jordi

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > =EF=BB=BF-----Mensaje original-----

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > De: v6ops <v6ops-bounces@ietf.org> en nombre de <internet=
-

    >=20

    >     > drafts@ietf.org>

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > Fecha: s=C3=A1bado, 16 de junio de 2018, 8:43

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > Para: <i-d-announce@ietf.org>

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > CC: <v6ops@ietf.org>

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > Asunto: [v6ops] I-D Action: draft-ietf-v6ops-transition-i=
pv4aas-

    > 03.txt

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     A New Internet-Draft is available from the on-line In=
ternet-

    > Drafts

    >=20

    >     >

    >=20

    >     >     > directories.

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     This draft is a work item of the IPv6 Operations WG o=
f the

    > IETF.

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >             Title           : Requirements for IPv6 Custo=
mer Edge

    >=20

    >     > Routers to

    >=20

    >     >

    >=20

    >     >     > Support IPv4 Connectivity as-a-Service

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >             Authors         : Jordi Palet Martinez

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >                               Hans M.-H. Liu

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >                               Masanobu Kawashima

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     	Filename        : draft-ietf-v6ops-transition-ipv4aa=
s-

    > 03.txt

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     	Pages           : 20

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     	Date            : 2018-06-15

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     Abstract:

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        This document specifies the IPv4 service continuit=
y

    > requirements

    >=20

    >     > for

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        an IPv6 Customer Edge (CE) router, either provided=
 by the

    >=20

    >     > service

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        provider or thru the retail market.

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        Specifically, this document extends the "Basic

    > Requirements for

    >=20

    >     > IPv6

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        Customer Edge Routers" in order to allow the provi=
sioning

    > of

    >=20

    >     > IPv6

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        transition services for the support of "IPv4 as-a-=
Service"

    >=20

    >     > (IPv4aaS)

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        by means of new transition mechanisms.  The docume=
nt only

    > covers

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        transition technologies for delivering IPv4 in IPv=
6-only

    > access

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        networks, commonly called "IPv4 as-a-Service" (IPv=
4aaS),

    > as

    >=20

    >     > required

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        in a world where IPv4 addresses are no longer avai=
lable,

    > so

    >=20

    >     > hosts in

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        the customer LANs with IPv4-only or IPv6-only appl=
ications

    > or

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        devices, requiring to communicate with IPv4-only s=
ervices

    > at the

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >        Internet, are still able to do so.

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     The IETF datatracker status page for this draft is:

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     https://datatracker.ietf.org/doc/draft-ietf-v6ops-tra=
nsition-

    >=20

    >     > ipv4aas/

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     There are also htmlized versions available at:

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     https://tools.ietf.org/html/draft-ietf-v6ops-transiti=
on-

    > ipv4aas-03

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     https://datatracker.ietf.org/doc/html/draft-ietf-v6op=
s-

    > transition-

    >=20

    >     >

    >=20

    >     >     > ipv4aas-03

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     A diff from the previous version is available at:

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-v6ops-

    > transition-

    >=20

    >     > ipv4aas-03

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     Please note that it may take a couple of minutes from=
 the

    > time of

    >=20

    >     >

    >=20

    >     >     > submission

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     until the htmlized version and diff are available at

    >=20

    >     > tools.ietf.org.

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     Internet-Drafts are also available by anonymous FTP a=
t:

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     ftp://ftp.ietf.org/internet-drafts/

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     _______________________________________________

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     v6ops mailing list

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     v6ops@ietf.org

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >     https://www.ietf.org/mailman/listinfo/v6ops

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > **********************************************

    >=20

    >     >

    >=20

    >     >     > IPv4 is over

    >=20

    >     >

    >=20

    >     >     > Are you ready for the new Internet ?

    >=20

    >     >

    >=20

    >     >     > http://www.consulintel.es

    >=20

    >     >

    >=20

    >     >     > The IPv6 Company

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > This electronic message contains information which may be

    > privileged or

    >=20

    >     >

    >=20

    >     >     > confidential. The information is intended to be for the e=
xclusive

    > use

    >=20

    >     > of the

    >=20

    >     >

    >=20

    >     >     > individual(s) named above and further non-explicilty auth=
orized

    >=20

    >     > disclosure,

    >=20

    >     >

    >=20

    >     >     > copying, distribution or use of the contents of this info=
rmation,

    > even

    >=20

    >     > if

    >=20

    >     >

    >=20

    >     >     > partially, including attached files, is strictly prohibit=
ed and

    > will be

    >=20

    >     >

    >=20

    >     >     > considered a criminal offense. If you are not the intende=
d

    > recipient be

    >=20

    >     > aware

    >=20

    >     >

    >=20

    >     >     > that any disclosure, copying, distribution or use of the =
contents

    > of

    >=20

    >     > this

    >=20

    >     >

    >=20

    >     >     > information, even if partially, including attached files,=
 is

    > strictly

    >=20

    >     >

    >=20

    >     >     > prohibited, will be considered a criminal offense, so you=
 must

    > reply to

    >=20

    >     > the

    >=20

    >     >

    >=20

    >     >     > original sender to inform about this communication and de=
lete it.

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     >

    >=20

    >     >

    >=20

    >     >     > _______________________________________________

    >=20

    >     >

    >=20

    >     >     > v6ops mailing list

    >=20

    >     >

    >=20

    >     >     > v6ops@ietf.org

    >=20

    >     >

    >=20

    >     >     > https://www.ietf.org/mailman/listinfo/v6ops

    >=20

    >     >

    >=20

    >     >     _______________________________________________

    >=20

    >     >

    >=20

    >     >     v6ops mailing list

    >=20

    >     >

    >=20

    >     >     v6ops@ietf.org

    >=20

    >     >

    >=20

    >     >     https://www.ietf.org/mailman/listinfo/v6ops

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     >

    >=20

    >     > **********************************************

    >=20

    >     > IPv4 is over

    >=20

    >     > Are you ready for the new Internet ?

    >=20

    >     > http://www.consulintel.es

    >=20

    >     > The IPv6 Company

    >=20

    >     >

    >=20

    >     > This electronic message contains information which may be privi=
leged or

    >=20

    >     > confidential. The information is intended to be for the exclusi=
ve use

    > of the

    >=20

    >     > individual(s) named above and further non-explicilty authorized

    > disclosure,

    >=20

    >     > copying, distribution or use of the contents of this informatio=
n, even

    > if

    >=20

    >     > partially, including attached files, is strictly prohibited and=
 will be

    >=20

    >     > considered a criminal offense. If you are not the intended reci=
pient be

    > aware

    >=20

    >     > that any disclosure, copying, distribution or use of the conten=
ts of

    > this

    >=20

    >     > information, even if partially, including attached files, is st=
rictly

    >=20

    >     > prohibited, will be considered a criminal offense, so you must =
reply to

    > the

    >=20

    >     > original sender to inform about this communication and delete i=
t.

    >=20

    >     >

    >=20

    >     >

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    >=20

    > **********************************************

    > IPv4 is over

    > Are you ready for the new Internet ?

    > http://www.consulintel.es

    > The IPv6 Company

    >=20

    > This electronic message contains information which may be privileged =
or

    > confidential. The information is intended to be for the exclusive use=
 of the

    > individual(s) named above and further non-explicilty authorized discl=
osure,

    > copying, distribution or use of the contents of this information, eve=
n if

    > partially, including attached files, is strictly prohibited and will =
be

    > considered a criminal offense. If you are not the intended recipient =
be aware

    > that any disclosure, copying, distribution or use of the contents of =
this

    > information, even if partially, including attached files, is strictly

    > prohibited, will be considered a criminal offense, so you must reply =
to the

    > original sender to inform about this communication and delete it.

    >=20

    >=20

   =20

   =20




**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.




From nobody Thu Jun 21 06:55:44 2018
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From: Hans Liu <hansliu@gmail.com>
Date: Thu, 21 Jun 2018 21:55:27 +0800
Message-ID: <CAHEOdguWo5zujfSSr1+LX5McrAv2FDLxwL0rCudQ2NrV=DccQw@mail.gmail.com>
To: lee@asgard.org
Cc: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>, V6 Ops List <v6ops@ietf.org>
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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>
> "Or rely on the CPE" is my point. They don't have IPv6 in the OS now, so
> they need whatever the home gateway provides. No transition mechanisms are
> widespread in retail gateways; DS-Lite more than others. So we're waiting
> to see what goes into retail gateways.
>
I know! I know!  Working on it!!  Wish I could drive internally as I used
to.

Meanwhile, manufacturers are asking ISP customers what they want. You keep
> hearing that ISPs want 464xlat or lw4over6, and I keep hearing MAP.
>
I heard both, but not recently.   Either ISPs gave up or they gave up on
me.  :-)

Best regards,
Hans

--0000000000002d1854056f27455b
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<div dir=3D"ltr"><br><div class=3D"gmail_quote"><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1=
ex"><div text=3D"#000000" bgcolor=3D"#FFFFFF"><br>
    &quot;Or rely on the CPE&quot; is my point. They don&#39;t have IPv6 in=
 the OS
    now, so they need whatever the home gateway provides. No transition
    mechanisms are widespread in retail gateways; DS-Lite more than
    others. So we&#39;re waiting to see what goes into retail gateways.<br>
    </div></blockquote><div>I know! I know!=C2=A0 Working on it!!=C2=A0 Wis=
h I could drive internally as I used to.=C2=A0</div><div><br></div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc s=
olid;padding-left:1ex"><div text=3D"#000000" bgcolor=3D"#FFFFFF">Meanwhile,=
 manufacturers are asking ISP customers what they want.
    You keep hearing that ISPs want 464xlat or lw4over6, and I keep
    hearing MAP.<br></div></blockquote><div>I heard both, but not recently.=
=C2=A0 =C2=A0Either ISPs gave up or they gave up on me.=C2=A0 :-)</div><div=
><br></div><div>Best regards,</div><div>Hans=C2=A0</div></div></div>

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From: Ca By <cb.list6@gmail.com>
Date: Thu, 21 Jun 2018 07:53:19 -0700
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To: Lee Howard <lee@asgard.org>
Cc: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>, v6ops@ietf.org
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Subject: Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT really inferior to all other IPv6 transition technologies? -- Re: updating RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
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On Thu, Jun 14, 2018 at 10:34 AM Lee Howard <lee@asgard.org> wrote:

>
>
> On 06/14/2018 10:20 AM, JORDI PALET MARTINEZ wrote:
>
>
>
> I recall Windows Update 10 also has included CLAT support. I=E2=80=99m su=
re this
> will happen more and more in different OSs, as it makes a lot of sense in
> networks that may already have NAT64.
>
>
> You think? Like game console OSs and thermostat OSs and stereo OSs and TV
> OSs?
>
>
> No, I mean desktop/tablet OSs (Windows, Linux, Chrome OS, iOS, Android).
> It makes a lot of sense specially for devices that are =E2=80=9Cportable=
=E2=80=9D and in
> fact that=E2=80=99s the idea behind Windows 10 Update. If you can use tha=
t device
> in a cellular IPv6-only network, should be expected that in a WiFi or wir=
ed
> IPv6-only network is behaving the same way when no native IPv4 is
> available. The other kind of OSs that you mention should either have
> already IPv6-only or rely in the CPE to provide IPv4 if they really need
> that.
>
>
> "Or rely on the CPE" is my point. They don't have IPv6 in the OS now, so
> they need whatever the home gateway provides. No transition mechanisms ar=
e
> widespread in retail gateways; DS-Lite more than others. So we're waiting
> to see what goes into retail gateways.
> Meanwhile, manufacturers are asking ISP customers what they want. You kee=
p
> hearing that ISPs want 464xlat or lw4over6, and I keep hearing MAP.
>
> BUT it would be cool if game consoles did deploy CLAT, and provide a
> translation layer for games that only know IPv4. I don't know the
> architecture well enough to know whether that would work,
>
> Also, tethering behind an IPv6-only phone is still no problem if you have
> Windows 10 and a NAT64 server, apparently: just fire up the CLAT.
>
>
>
> That only matters if it actually gets implemented. "Easy" and "done" are
> different.
>
> You've said that home gateway vendors by and large have code for all of
> the mechanisms already written, so I'm not sure ease is essential.
>
> Yeah, talked to many, they often provide whatever you need if the order i=
s
> big, our problem is still the retail market or orders to vendors that don=
=E2=80=99t
> have sufficient amount to demand a specific firmware feature set.
>
>
>
> Code required for each transition in OpenWRT (it may be quite similar in
> other implementations):
>
>
>
> DS-Lite   15 Kbytes
>
> 464XLAT 17 Kbytes
>
> MAP-E    35 Kbytes
>
> LW4o6   35 Kbytes
>
> MAP-T   48 Kbytes
>
>
>
> If *all* them are implemented: 53 Kbytes (there are many =E2=80=9Cshared=
=E2=80=9D modules
> among them, same data plane, etc.).
>
>
> There are other drivers here, and while I have no concerns about 464xlat,
> I also am not ready to crown it the winner.
>
>
>
> I bet a dinner =E2=80=A6 Cellular is too powerful and they made the decis=
ion long
> time ago.
>
>
> What's the decision criterion? :)
> Mobile is huge, but has little influence on wireline. And most of them
> (globally) are still on dual stack.
>

Yes, mobile is huge.

Also, i have seen 5G scenarios where pure play mobile and mobile / wireline
providers are choosing to deploy home broadband with wireless 5G.

If that mobile team had smashing success with 464xlat, i imagine they would
keep that model for 5G home broadband products.  After all, entering the
home broadband market as geenfield would be silly not to be a ipv6 first
service.




>
> Lee
>
>
>
> Lee
>
>
>
> Regarsd,
>
> Jordi
>
>
>
>
>
>
>
> *De: *v6ops <v6ops-bounces@ietf.org> <v6ops-bounces@ietf.org> en nombre
> de Lee Howard <lee@asgard.org> <lee@asgard.org>
> *Fecha: *jueves, 14 de junio de 2018, 15:16
> *Para: *<v6ops@ietf.org> <v6ops@ietf.org>
> *Asunto: *Re: [v6ops] Disadvantages of MAP protocols -- Re: Is 464XLAT
> really inferior to all other IPv6 transition technologies? -- Re: updatin=
g
> RFC8026 to support 464XLAT in draft-ietf-v6ops-transition-ipv4aas
>
>
>
>
>
>
>
> On 06/14/2018 08:12 AM, Ca By wrote:
>
>
>
>
>
> On Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti <lorenzo=3D
> 40google.com@dmarc.ietf.org> wrote:
>
> On Thu, Jun 14, 2018 at 7:28 PM <nick.heatley@bt.com> wrote:
>
>
>
>
>
> Oh, I definitely agree that 464xlat has it's place. I maintain a popular
> implementation of it :-)
>
>
>
> I'm just saying it's not the best solution for a wireline network.
>
>
>
> Perhaps.
>
>
>
> The market for ipv6-only transition, afaik, is won by ds-lite and 464xlat=
.
>
>
>
> Afaik, there is not a large production stateless MAP implementation, and
> this market is fairly mature. That said, at this point, the theoretical
> advantage of stateless has failed to materialize in real world deployment
> ... while the stateful solutions keep gaining share.
>
>
>
>
>
> Crowd-sourced list of transition technologies various carriers have
> deployed:
> https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_=
7NK9vcVApc/edit#gid=3D0
>
> I see several that have deployed MAP.
>
> I speculate that DS-Lite and NAT64 had early mover advantage (i.e., early
> development), and were the only game in town. 464xlat only has that
> advantage in mobile, since handsets are the only major CLAT implementatio=
n.
>
> I think it's too soon to declare winners.
>
> Lee
>
>
>
> _______________________________________________ v6ops mailing list
> v6ops@ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>
>
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>
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> disclosure, copying, distribution or use of the contents of this
> information, even if partially, including attached files, is strictly
> prohibited and will be considered a criminal offense. If you are not the
> intended recipient be aware that any disclosure, copying, distribution or
> use of the contents of this information, even if partially, including
> attached files, is strictly prohibited, will be considered a criminal
> offense, so you must reply to the original sender to inform about this
> communication and delete it.
>
>
>
>
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>
> This electronic message contains information which may be privileged or
> confidential. The information is intended to be for the exclusive use of
> the individual(s) named above and further non-explicilty authorized
> disclosure, copying, distribution or use of the contents of this
> information, even if partially, including attached files, is strictly
> prohibited and will be considered a criminal offense. If you are not the
> intended recipient be aware that any disclosure, copying, distribution or
> use of the contents of this information, even if partially, including
> attached files, is strictly prohibited, will be considered a criminal
> offense, so you must reply to the original sender to inform about this
> communication and delete it.
>
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--00000000000026221d056f281477
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div><br></div><div><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Thu,=
 Jun 14, 2018 at 10:34 AM Lee Howard &lt;<a href=3D"mailto:lee@asgard.org">=
lee@asgard.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
text=3D"#000000" bgcolor=3D"#FFFFFF">
    <p><br>
    </p>
    <br>
    <div class=3D"m_944000864588186636moz-cite-prefix">On 06/14/2018 10:20 =
AM, JORDI PALET
      MARTINEZ wrote:<br>
    </div>
    <blockquote type=3D"cite">
     =20
     =20
     =20
      <div class=3D"m_944000864588186636WordSection1">
        <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
        <blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
          <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D=
"EN-US">I recall
              Windows Update 10 also has included CLAT support. I=E2=80=99m=
 sure
              this will happen more and more in different OSs, as it
              makes a lot of sense in networks that may already have
              NAT64.</span><u></u><u></u></p>
        </blockquote>
        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D"E=
N-US"><br>
            You think? Like game console OSs and thermostat OSs and
            stereo OSs and TV OSs? <br>
            <br>
            <br>
            <u></u><u></u></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-US">No, I mean
            desktop/tablet OSs (Windows, Linux, Chrome OS, iOS,
            Android). It makes a lot of sense specially for devices that
            are =E2=80=9Cportable=E2=80=9D and in fact that=E2=80=99s the i=
dea behind Windows 10
            Update. If you can use that device in a cellular IPv6-only
            network, should be expected that in a WiFi or wired
            IPv6-only network is behaving the same way when no native
            IPv4 is available. The other kind of OSs that you mention
            should either have already IPv6-only or rely in the CPE to
            provide IPv4 if they really need that.</span></p>
      </div>
    </blockquote>
    <br></div><div text=3D"#000000" bgcolor=3D"#FFFFFF">
    &quot;Or rely on the CPE&quot; is my point. They don&#39;t have IPv6 in=
 the OS
    now, so they need whatever the home gateway provides. No transition
    mechanisms are widespread in retail gateways; DS-Lite more than
    others. So we&#39;re waiting to see what goes into retail gateways.<br>
    Meanwhile, manufacturers are asking ISP customers what they want.
    You keep hearing that ISPs want 464xlat or lw4over6, and I keep
    hearing MAP.<br>
    <br>
    BUT it would be cool if game consoles did deploy CLAT, and provide a
    translation layer for games that only know IPv4. I don&#39;t know the
    architecture well enough to know whether that would work,<br>
    <br>
    Also, tethering behind an IPv6-only phone is still no problem if you
    have Windows 10 and a NAT64 server, apparently: just fire up the
    CLAT.</div><div text=3D"#000000" bgcolor=3D"#FFFFFF"><br>
    <br>
    <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D"EN-US=
"></span><u></u><u></u></p>
    <blockquote type=3D"cite">
      <div class=3D"m_944000864588186636WordSection1">
        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><br>
          That only matters if it actually gets implemented. &quot;Easy&quo=
t; and
          &quot;done&quot; are different.<br>
          <br>
          You&#39;ve said that home gateway vendors by and large have code
          for all of the mechanisms already written, so I&#39;m not sure
          ease is essential.<br>
          <br>
          <u></u><u></u></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-US">Yeah, talked to many,
            they often provide whatever you need if the order is big,
            our problem is still the retail market or orders to vendors
            that don=E2=80=99t have sufficient amount to demand a specific
            firmware feature set.<u></u><u></u></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></s=
pan></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-US">Code required for each
            transition in OpenWRT (it may be quite similar in other
            implementations):<u></u><u></u></span></p>
        <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
        <p class=3D"MsoNormal">DS-Lite=C2=A0=C2=A0 15 Kbytes<u></u><u></u><=
/p>
        <p class=3D"MsoNormal"><span lang=3D"EN-US">464XLAT 17 Kbytes</span=
><span lang=3D"EN-US"><u></u><u></u></span></p>
        <p class=3D"MsoNormal">MAP-E =C2=A0=C2=A0=C2=A035 Kbytes<u></u><u><=
/u></p>
        <p class=3D"MsoNormal">LW4o6 =C2=A0=C2=A035 Kbytes<u></u><u></u></p=
>
        <p class=3D"MsoNormal">MAP-T =C2=A0=C2=A048 Kbytes<u></u><u></u></p=
>
        <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-US">If *all* them are
            implemented: 53 Kbytes (there are many =E2=80=9Cshared=E2=80=9D=
 modules
            among them, same data plane, etc.).<u></u><u></u></span></p>
        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D"E=
N-US"><br>
            There are other drivers here, and while I have no concerns
            about 464xlat, I also am not ready to crown it the winner. <u><=
/u><u></u></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></s=
pan></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-US">I bet a dinner =E2=80=
=A6
            Cellular is too powerful and they made the decision long
            time ago.</span></p>
      </div>
    </blockquote>
    <br></div><div text=3D"#000000" bgcolor=3D"#FFFFFF">
    What&#39;s the decision criterion? :)<br>
    Mobile is huge, but has little influence on wireline. And most of
    them (globally) are still on dual stack.</div><div text=3D"#000000" bgc=
olor=3D"#FFFFFF"></div></blockquote><div dir=3D"auto"><br></div><div dir=3D=
"auto">Yes, mobile is huge.=C2=A0</div><div dir=3D"auto"><br></div><div dir=
=3D"auto">Also, i have seen 5G scenarios where pure play mobile and mobile =
/ wireline providers are choosing to deploy home broadband with wireless 5G=
.=C2=A0</div><div dir=3D"auto"><br></div><div dir=3D"auto">If that mobile t=
eam had smashing success with 464xlat, i imagine they would keep that model=
 for 5G home broadband products.=C2=A0 After all, entering the home broadba=
nd market as geenfield would be silly not to be a ipv6 first service.=C2=A0=
</div><div dir=3D"auto"><br></div><div dir=3D"auto"><br></div><div dir=3D"a=
uto"><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex=
;border-left:1px #ccc solid;padding-left:1ex"><div text=3D"#000000" bgcolor=
=3D"#FFFFFF"><br>
    <br>
    Lee</div><div text=3D"#000000" bgcolor=3D"#FFFFFF"><br>
    <blockquote type=3D"cite">
      <div class=3D"m_944000864588186636WordSection1">
        <p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u><u></u></span></=
p>
        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D"E=
N-US"><br>
            <br>
          </span>Lee<br>
          =C2=A0<br>
          <br>
          <u></u><u></u></p>
        <blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
          <div>
            <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span style=
=3D"font-size:10.5pt;color:black" lang=3D"EN-US"><br>
                Regarsd,</span><u></u><u></u></p>
            <p class=3D"MsoNormal" style=3D"margin-right:0cm;margin-bottom:=
12.0pt;margin-left:35.4pt"><span style=3D"font-size:10.5pt;color:black" lan=
g=3D"EN-US">Jordi</span><u></u><u></u></p>
            <p class=3D"MsoNormal" style=3D"margin-right:0cm;margin-bottom:=
12.0pt;margin-left:35.4pt"><span style=3D"font-size:10.5pt;color:black" lan=
g=3D"EN-US">=C2=A0</span><u></u><u></u></p>
          </div>
          <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D=
"EN-US">=C2=A0</span><u></u><u></u></p>
          <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D=
"EN-US">=C2=A0</span><u></u><u></u></p>
          <div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:=
3.0pt 0cm 0cm 0cm">
            <p class=3D"MsoNormal" style=3D"margin-left:70.8pt"><b><span st=
yle=3D"font-size:12.0pt;color:black">De: </span></b><span style=3D"font-siz=
e:12.0pt;color:black">v6ops <a href=3D"mailto:v6ops-bounces@ietf.org" targe=
t=3D"_blank">&lt;v6ops-bounces@ietf.org&gt;</a>
                en nombre de Lee Howard <a href=3D"mailto:lee@asgard.org" t=
arget=3D"_blank">&lt;lee@asgard.org&gt;</a><br>
                <b>Fecha: </b>jueves, 14 de junio de 2018, 15:16<br>
                <b>Para: </b><a href=3D"mailto:v6ops@ietf.org" target=3D"_b=
lank">&lt;v6ops@ietf.org&gt;</a><br>
                <b>Asunto: </b>Re: [v6ops] Disadvantages of MAP
                protocols -- Re: Is 464XLAT really inferior to all other
                IPv6 transition technologies? -- Re: updating RFC8026 to
                support 464XLAT in draft-ietf-v6ops-transition-ipv4aas</spa=
n><u></u><u></u></p>
          </div>
          <div>
            <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">=C2=A0<u></=
u><u></u></p>
          </div>
          <p style=3D"margin-left:70.8pt">=C2=A0<u></u><u></u></p>
          <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">=C2=A0<u></u>=
<u></u></p>
          <div>
            <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">On
              06/14/2018 08:12 AM, Ca By wrote:<u></u><u></u></p>
          </div>
          <blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
            <div>
              <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">=C2=A0<u>=
</u><u></u></p>
            </div>
            <div>
              <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">=C2=A0<u>=
</u><u></u></p>
              <div>
                <div>
                  <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">On
                    Thu, Jun 14, 2018 at 3:31 AM Lorenzo Colitti
                    &lt;lorenzo=3D<a href=3D"mailto:40google.com@dmarc.ietf=
.org" target=3D"_blank">40google.com@dmarc.ietf.org</a>&gt;
                    wrote:<u></u><u></u></p>
                </div>
                <blockquote style=3D"border:none;border-left:solid #cccccc =
1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-r=
ight:0cm;margin-bottom:5.0pt">
                  <div>
                    <div>
                      <div>
                        <p class=3D"MsoNormal" style=3D"margin-left:70.8pt"=
>On
                          Thu, Jun 14, 2018 at 7:28 PM &lt;<a href=3D"mailt=
o:nick.heatley@bt.com" target=3D"_blank">nick.heatley@bt.com</a>&gt;
                          wrote:<u></u><u></u></p>
                      </div>
                      <blockquote style=3D"border:none;border-left:solid #c=
ccccc 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;ma=
rgin-right:0cm;margin-bottom:5.0pt">
                        <div>
                          <div>
                            <p class=3D"MsoNormal" style=3D"margin-left:70.=
8pt"><span lang=3D"EN-GB">=C2=A0</span><u></u><u></u></p>
                          </div>
                        </div>
                      </blockquote>
                      <div>
                        <p class=3D"MsoNormal" style=3D"margin-left:70.8pt"=
>=C2=A0<u></u><u></u></p>
                      </div>
                    </div>
                  </div>
                  <div>
                    <div>
                      <div>
                        <p class=3D"MsoNormal" style=3D"margin-left:70.8pt"=
>Oh,
                          I definitely agree that 464xlat has it&#39;s
                          place. I maintain a popular implementation of
                          it :-)<u></u><u></u></p>
                      </div>
                      <div>
                        <p class=3D"MsoNormal" style=3D"margin-left:70.8pt"=
>=C2=A0<u></u><u></u></p>
                      </div>
                      <div>
                        <p class=3D"MsoNormal" style=3D"margin-left:70.8pt"=
>I&#39;m
                          just saying it&#39;s not the best solution for a
                          wireline network.=C2=A0<u></u><u></u></p>
                      </div>
                    </div>
                  </div>
                </blockquote>
                <div>
                  <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">=C2=
=A0<u></u><u></u></p>
                </div>
                <div>
                  <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">Perha=
ps.=C2=A0<u></u><u></u></p>
                </div>
                <div>
                  <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">=C2=
=A0<u></u><u></u></p>
                </div>
                <div>
                  <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">The
                    market for ipv6-only transition, afaik, is won by
                    ds-lite and 464xlat.=C2=A0<u></u><u></u></p>
                </div>
                <div>
                  <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">=C2=
=A0<u></u><u></u></p>
                </div>
                <div>
                  <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">Afaik=
,
                    there is not a large production stateless MAP
                    implementation, and this market is fairly mature.
                    That said, at this point, the theoretical advantage
                    of stateless has failed to materialize in real world
                    deployment ... while the stateful solutions keep
                    gaining share.=C2=A0<u></u><u></u></p>
                </div>
                <div>
                  <p class=3D"MsoNormal" style=3D"margin-left:70.8pt">=C2=
=A0<u></u><u></u></p>
                </div>
              </div>
            </div>
          </blockquote>
          <p class=3D"MsoNormal" style=3D"margin-left:70.8pt"><br>
            <br>
            Crowd-sourced list of transition technologies various
            carriers have deployed: <a href=3D"https://docs.google.com/spre=
adsheets/d/1ksOoWOaRdRyjZnjLSikHf4O5L1OUTNOO_7NK9vcVApc/edit#gid=3D0" targe=
t=3D"_blank">https://docs.google.com/spreadsheets/d/1ksOoWOaRdRyjZnjLSikHf4=
O5L1OUTNOO_7NK9vcVApc/edit#gid=3D0</a><br>
            <br>
            I see several that have deployed MAP. <br>
            <br>
            I speculate that DS-Lite and NAT64 had early mover advantage
            (i.e., early development), and were the only game in town.
            464xlat only has that advantage in mobile, since handsets
            are the only major CLAT implementation. <br>
            <br>
            I think it&#39;s too soon to declare winners.<br>
            <br>
            Lee<br>
            <br>
            <br>
            <br>
            _______________________________________________ v6ops
            mailing list <a href=3D"mailto:v6ops@ietf.org" target=3D"_blank=
">v6ops@ietf.org</a> <a href=3D"https://www.ietf.org/mailman/listinfo/v6ops=
" target=3D"_blank">https://www.ietf.org/mailman/listinfo/v6ops</a>
            <u></u><u></u></p>
          <p class=3D"MsoNormal" style=3D"margin-right:0cm;margin-bottom:12=
.0pt;margin-left:35.4pt"><br>
            **********************************************<br>
            IPv4 is over<br>
            Are you ready for the new Internet ?<br>
            <a href=3D"http://www.consulintel.es" target=3D"_blank">http://=
www.consulintel.es</a><br>
            The IPv6 Company<br>
            <br>
            This electronic message contains information which may be
            privileged or confidential. The information is intended to
            be for the exclusive use of the individual(s) named above
            and further non-explicilty authorized disclosure, copying,
            distribution or use of the contents of this information,
            even if partially, including attached files, is strictly
            prohibited and will be considered a criminal offense. If you
            are not the intended recipient be aware that any disclosure,
            copying, distribution or use of the contents of this
            information, even if partially, including attached files, is
            strictly prohibited, will be considered a criminal offense,
            so you must reply to the original sender to inform about
            this communication and delete it.<u></u><u></u></p>
        </blockquote>
        <p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><br>
          <br>
          <u></u><u></u></p>
      </div>
      <br>
      **********************************************<br>
      IPv4 is over<br>
      Are you ready for the new Internet ?<br>
      <a class=3D"m_944000864588186636moz-txt-link-freetext" href=3D"http:/=
/www.consulintel.es" target=3D"_blank">http://www.consulintel.es</a><br>
      The IPv6 Company<br>
      <br>
      This electronic message contains information which may be
      privileged or confidential. The information is intended to be for
      the exclusive use of the individual(s) named above and further
      non-explicilty authorized disclosure, copying, distribution or use
      of the contents of this information, even if partially, including
      attached files, is strictly prohibited and will be considered a
      criminal offense. If you are not the intended recipient be aware
      that any disclosure, copying, distribution or use of the contents
      of this information, even if partially, including attached files,
      is strictly prohibited, will be considered a criminal offense, so
      you must reply to the original sender to inform about this
      communication and delete it.<br>
      <br>
    </blockquote>
    <br>
  </div>

_______________________________________________<br>
v6ops mailing list<br>
<a href=3D"mailto:v6ops@ietf.org" target=3D"_blank">v6ops@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/v6ops" rel=3D"noreferrer" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/v6ops</a><br>
</blockquote></div></div>

--00000000000026221d056f281477--


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Date: Thu, 21 Jun 2018 12:05:18 -0300 (ART)
From: Alejandro D'Egidio <adegidio@telecentro.net.ar>
To: lencse@hit.bme.hu
Cc: "v6ops@ietf.org list" <v6ops@ietf.org>
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Thread-Topic: "BoF" for I-D -- Re: Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/11417qKL877eR91FdEiQyJ3feYg>
Subject: Re: [v6ops] "BoF" for I-D -- Re: Pros and Cons of IPv6 Transition Technologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
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Hi Lencse,
  If is possible, I would like to help.


Regards,

ALEJANDRO D'EGIDIO=20
Jefe de Ingenier=C3=ADa de Backbone=20
F: +54 11 3977 1025=C2=A0 | M: +54 911 5794 1589=20
Lavard=C3=A9n 157. Piso 3. CABA (C1437FBC)

----- Mensaje original -----
De: "Richard Patterson" <richard@helix.net.nz>
Para: lencse@hit.bme.hu
CC: "v6ops@ietf.org list" <v6ops@ietf.org>
Enviados: Martes, 19 de Junio 2018 5:29:14
Asunto: Re: [v6ops] "BoF" for I-D -- Re: Pros and Cons of IPv6 Transition T=
echnologies for IPv4aaS -- Re: no need to update RFC8026 in draft-ietf-v6op=
s-transition-ipv4aas

Hi Lencse,

I'd be happy to help also.

-Richard
On Tue, 19 Jun 2018 at 08:09, Lencse G=C3=A1bor <lencse@hit.bme.hu> wrote:
>
> Dear Lee,
>
> Thank you very much for offering your help and participation. I have deci=
ded to write the draft and I invite you to be a co-author.
>
> Are there some other people, who would like to join us?
>
> I plan to put together a table with the information extracted from past e=
-mails on the list and send it to Lee (and possibly other participants) fir=
st, and send the Google docs URL to the list after we agreed on its initial=
 content.
>
> Best regards,
>
> G=C3=A1bor
>
>
> 6/18/2018 4:38 PM keltez=C3=A9ssel, Lee Howard =C3=ADrta:
>
> Apparently I'm a week late on this thread. Sorry.
>
> I think an internet-draft in this case would be useful for reflecting the=
 current best knowledge about the technologies. Even if it takes two years =
or more to publish, a draft is useful to collect  and summarize the detaile=
d academic papers being published, and the structure of writing the draft w=
ill help point out areas where further research is needed.
>
> I'm also interested in supporting this work, up to and including working =
with your students,  providing my own test results, and/or co-authoring.
>
> Lee
>
>
> On 06/15/2018 10:04 AM, JORDI PALET MARTINEZ wrote:
>
> I=E2=80=99m not sure it makes sense something that is not published in, l=
et=E2=80=99s say, maximum one year from now.
>
>
>
> Anyway, I=E2=80=99m happy to help.
>
>
>
> By the way, I got some private questions about this =E2=80=A6 The table t=
hat I=E2=80=99ve posted yesterday, was developed about 3 years ago, and I=
=E2=80=99ve not updated it since them. Actually from emails exchanged today=
, I discovered a couple of mistakes and also things that can be improved, s=
o if needed I can update it as well.
>
>
> Regards,
>
> Jordi
>
>
>
>
>
>
>
> De: v6ops <v6ops-bounces@ietf.org> en nombre de Lencse G=C3=A1bor <lencse=
@hit.bme.hu>
> Fecha: viernes, 15 de junio de 2018, 14:25
> Para: Fred Baker <fredbaker.ietf@gmail.com>
> CC: <v6ops@ietf.org>
> Asunto: [v6ops] Pros and Cons of IPv6 Transition Technologies for IPv4aaS=
 -- Re: no need to update RFC8026 in draft-ietf-v6ops-transition-ipv4aas
>
>
>
> Dear Fred,
>
> Thank you very much for your invitation. I am willing to accept it, but I=
 would like to clarify your expectations before saying 'yes'.
>
> I have several questions.
>
> 1. Depth of the analysis
>
> - Basic level: well-known advantages and disadvantages, similarly as peop=
le wrote about MAP-T/E and 464XLAT, but also about DS-Lite and lw4o6.
> - Advanced level: basic level + security analysis using the methodology d=
efined in [1] + performance analysis according to RFC 8219.
>
> What depth do you recommend?
>
> 2. Method for getting the results and their publication
>
> As for the information for the basic level, I would prepare a google docs=
 table, fill in the information I have and send the link to the v6ops list =
asking contributions.
> After commenting and discussing, I would compile it to an I-D.
>
> Do you think that v6ops WG would finally agree to publish it as an RFC?
>
> As for the information for the advanced level, I would work together with=
 my students and PhD students, and publish our results first in academic pa=
pers and then include their most important lessons into the I-D.
>
> What do you think of it?
>
> 3. Timeline
>
> I think that I could put together the first table in a few weeks. The con=
tribution of the v6ops list members and the discussion could be done in a f=
ew months and then I could compile the results into an I-D in a few weeks. =
Perhaps, it could be presented at IETF 103.
>
> The further parts would require much more time and results could be inclu=
ded gradually in 1-2 years.
>
> 4. Scope
>
> The smallest natural scope includes the technologies for IPv4AAS, that is=
: 464XLAT, DS-Lite, MAP-T/E and lw4o6.
>
> IPv6 transition technologies for other carefully selected scenarios might=
 also be included. E.g. I have significant amount of results in benchmarkin=
g DNS64 servers, having a testing tool [2], a well defined methodology [3] =
and ready to use results concerning the DNS64 performance of BIND, PowerDNS=
 and Unbound [4].
> One of my PhD students is currently benchmarking some sateless NAT64 impl=
ementations according the the dual DUT setup of RFC 8219 using an RFC 2544 =
compatible Tester. Another PhD student is currently working on a RFC 8219 c=
ompliant NAT64 tester program (using DPDK) to be able to perform single DUT=
 setup NAT64 benchmarking tests.
>
> Thus, the scope can be widened, if you would like to.
>
> What do you think about my recommendations?
>
> Best regards,
>
> G=C3=A1bor
>
> References:
>
> [1] G. Lencse and Y. Kadobayashi, "Methodology for the identification of =
potential security issues of different IPv6 transition technologies: Threat=
 analysis of DNS64 and stateful NAT64", Computers & Security (Elsevier), vo=
l. 77, no. 1, pp. 397-411, August 1, 2018, DOI: 10.1016/j.cose.2018.04.012
>
> [2] G. Lencse, D. Bakai, "Design and implementation of a test program for=
 benchmarking DNS64 servers", IEICE Transactions on Communications, vol. E1=
00-B, no. 6. pp. 948-954, June 2017. DOI: 10.1587/transcom.2016EBN0007
>
> [3] G. Lencse, M. Georgescu, and Y. Kadobayashi, "Benchmarking Methodolog=
y for DNS64 Servers", Computer Communications (Elsevier), vol. 109, no. 1, =
pp. 162-175, September 1, 2017, DOI: 10.1016/j.comcom.2017.06.004
>
> [4] G. Lencse and Y. Kadobayashi, "Benchmarking DNS64 Implementations: Th=
eory and Practice", Computer Communications (Elsevier), vol. 127, no. 1, pp=
. 61-74, September 1, 2018, DOI: 10.1016/j.comcom.2018.05.005
>
> 6/14/2018 10:42 PM keltez=C3=A9ssel, Fred Baker =C3=ADrta:
>
>
>
> On Jun 14, 2018, at 1:15 PM, Lencse G=C3=A1bor <lencse@hit.bme.hu> wrote:
>
> I have an idea: perhaps you could add a section about the pros and cons o=
f each transition technology covered by the draft. (It could be helpful for=
 the network operators when selecting the technology matching their need th=
e best. However, I am not sure whether it is in the scope of this draft.)
>
> It would be incredibly useful. That said, it often involves value judgeme=
nts, which are essentially in the eye of the beholder.
>
>
>
> We have had a recent thread regarding 464xlat and MAP-T. If I can say thi=
s without actually putting words into Lorenzo's mouth, his issues with tran=
slation in general are probably summarized in RFC 2993, and I would agree w=
ith him. The distinction between 464xlat and MAP-T you'll have to find in h=
is emails; they are both services an ISP might deploy, and while they use t=
he same tool (translation) they are not the same service. It seems to be ge=
nerally agreed that MAP-T is more expensive to deploy than 464xlat; the que=
stion is what the extra expense buys, and whether someone agrees that the r=
esult is worth the cost.
>
>
>
> So in your proposed section, I would have to ask Jordi to not only say "M=
AP-T costs more to deploy than 464xlat", but gives the argument that might =
lead someone to choose MAP-T.
>
>
>
> And then we get to the large variety of other technologies, some of which=
 presume an IPv4 core network and some an IPv6 core network (and none of wh=
ich assume an MPLS core network carrying both kinds of traffic).
>
>
>
> If you would like to write such a document, please be my guest, by all me=
ans. But I'm not going to expect Jordi to do all that in the coming two wee=
ks...
>
>
> _______________________________________________ v6ops mailing list v6ops@=
ietf.org https://www.ietf.org/mailman/listinfo/v6ops
>
>
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>
> This electronic message contains information which may be privileged or c=
onfidential. The information is intended to be for the exclusive use of the=
 individual(s) named above and further non-explicilty authorized disclosure=
, copying, distribution or use of the contents of this information, even if=
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>
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>
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>
>
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From nobody Sat Jun 23 10:45:22 2018
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In-reply-to: Your message of "Sat, 23 Jun 2018 05:38:30 -0700 ." <6.2.5.6.2.20180623052647.0c968b90@elandnews.com> 
Date: Sat, 23 Jun 2018 19:44:48 +0200
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/Y4IFfHO_iM5QAjAl9cK-RAtrdaY>
Subject: Re: [v6ops] SAILing LAPs
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>There was a discussion about recommendations of the IETF about IPv6 
>address assignments and it ended with a RFC 6177.  I suggest reading 
>the summary of that discussion (in Section 5).

Unfortunately, RFC 6177 contains exactly the worrying arguements that
should encourage drawing a line in the sand and keeping the 64 bit
boundary.

The IETF had clear technical ideas why customers should get a /48.

It is possible that the IETF mis-understood operational concerns. However,
RFC 6177 does not discuss clear operational problems with /48. Instead
we get the following text:

"While the /48 recommendation does simplify address space management
"for end sites, it has also been widely criticized as being wasteful.
"For example, a large business (which may have thousands of employees)
"would, by default, receive the same amount of address space as a home
"user, who today typically has a single (or small number of) LAN and a
"small number of devices (dozens or less).

It is clear that operators consider bits to precious without any operational
reason behind that. What are the benefits of providing customers with
longer prefixes? We don't know.

So reality is that operators cannot know what a customer really needs. They
have some model of what a customer should need according to them, and the
possibility to upsell.

So instead of having clear guide lines that customers need to get a /48,
we now have a discussion on subdividing /64s.



From nobody Sat Jun 23 10:48:09 2018
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In-reply-to: Your message of "Sat, 23 Jun 2018 19:44:48 +0200 ." <m1fWmap-0000IoC@stereo.hq.phicoh.net> 
Date: Sat, 23 Jun 2018 19:48:04 +0200
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/RcLCPPY0rO22zG6ujSxLSyEiyv0>
Subject: Re: [v6ops] SAILing LAPs
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Oops, this was meant to go to 6man. 


From nobody Sat Jun 23 11:27:16 2018
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Date: Sat, 23 Jun 2018 20:27:02 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Philip Homburg <pch-v6ops-8@u-1.phicoh.com>, <v6ops@ietf.org>
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Thread-Topic: [v6ops] SAILing LAPs
References: <152946990900.32509.15132787302635646979@ietfa.amsl.com> <50bdcf46-de26-66cd-415d-0c964fd38d57@gmail.com> <915CA4E0-D278-4BCA-B271-CC3BA8177CB8@employees.org> <864efe39-9759-d10b-1dce-27485ab743c1@gmail.com> <9873CDF0-8415-4B9E-8854-5D207BB2FF37@employees.org> <m1fVvvd-0000GAC@stereo.hq.phicoh.net> <CAN-Dau2V9TtRQ+wigpy9sjj60EE7akuMaRKObL+i4n3Wh=UrrQ@mail.gmail.com> <m1fWHrO-0000HJC@stereo.hq.phicoh.net> <27a0b169b8774ada8558f1c1606ad8fe@XCH15-01-07.nw.nos.boeing.com> <m1fWgHa-0000HKC@stereo.hq.phicoh.net> <6.2.5.6.2.20180623052647.0c968b90@elandnews.com> <m1fWmap-0000IoC@stereo.hq.phicoh.net>
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Subject: Re: [v6ops] SAILing LAPs
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I've a -bis version for RFC6177, which I drafted a couple of months ago, bu=
t I need to coordinate with my co-author (one of the original RFC6177 autho=
rs), hopefully during next week.



I was trying, precisely to fix there all the related discussions on the /64=
 and the /48 boundaries ...



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de Philip Homburg <pch-v6ops-8=
@u-1.phicoh.com>

Fecha: s=C3=A1bado, 23 de junio de 2018, 19:46

Para: <v6ops@ietf.org>

CC: S Moonesamy <sm+ietf@elandsys.com>

Asunto: Re: [v6ops] SAILing LAPs



    >There was a discussion about recommendations of the IETF about IPv6=20

    >address assignments and it ended with a RFC 6177.  I suggest reading=
=20

    >the summary of that discussion (in Section 5).

   =20

    Unfortunately, RFC 6177 contains exactly the worrying arguements that

    should encourage drawing a line in the sand and keeping the 64 bit

    boundary.

   =20

    The IETF had clear technical ideas why customers should get a /48.

   =20

    It is possible that the IETF mis-understood operational concerns. Howev=
er,

    RFC 6177 does not discuss clear operational problems with /48. Instead

    we get the following text:

   =20

    "While the /48 recommendation does simplify address space management

    "for end sites, it has also been widely criticized as being wasteful.

    "For example, a large business (which may have thousands of employees)

    "would, by default, receive the same amount of address space as a home

    "user, who today typically has a single (or small number of) LAN and a

    "small number of devices (dozens or less).

   =20

    It is clear that operators consider bits to precious without any operat=
ional

    reason behind that. What are the benefits of providing customers with

    longer prefixes? We don't know.

   =20

    So reality is that operators cannot know what a customer really needs. =
They

    have some model of what a customer should need according to them, and t=
he

    possibility to upsell.

   =20

    So instead of having clear guide lines that customers need to get a /48=
,

    we now have a discussion on subdividing /64s.

   =20

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




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Subject: Re: [v6ops] SAILing LAPs
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--000000000000efb4e2056f6e10a0
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A 6177bis document is exactly the right place to reiterate this stuff. I
look forward to seeing your draft.

On Sat, 23 Jun 2018 20:27:02 +0200, JORDI PALET MARTINEZ wrote:

> I've a -bis version for RFC6177, which I drafted a couple of months ago,
> but I need to coordinate with my co-author (one of the original RFC6177
> authors), hopefully during next week.
>
> I was trying, precisely to fix there all the related discussions on the
> /64 and the /48 boundaries ...
>
> Regards,
>
> Jordi
>
>

--000000000000efb4e2056f6e10a0
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<div dir=3D"ltr"><div>A 6177bis document is exactly the right place to reit=
erate this stuff. I look forward to seeing your draft.=C2=A0<br></div><div>=
<br></div><div>On Sat, 23 Jun 2018 20:27:02 +0200, JORDI PALET MARTINEZ=C2=
=A0wrote:<br></div><div><blockquote class=3D"gmail_quote" style=3D"margin:0=
px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border=
-left-width:1px;border-left-style:solid"><div class=3D"m_576108428478714232=
7gmail-m_-9035050859231027493gmail-HOEnZb"><div class=3D"m_5761084284787142=
327gmail-m_-9035050859231027493gmail-h5"><div dir=3D"ltr"><div class=3D"gma=
il_extra"><div class=3D"gmail_extra">I&#39;ve a -bis version for RFC6177, w=
hich I drafted a couple of months ago, but I need to coordinate with my co-=
author (one of the original RFC6177 authors), hopefully during next week.=
=C2=A0</div><div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra"=
>I was trying, precisely to fix there all the related discussions on the /6=
4 and the /48 boundaries ...</div><div class=3D"gmail_extra"><br></div><div=
 class=3D"gmail_extra">Regards,</div><div class=3D"gmail_extra"><br></div><=
div class=3D"gmail_extra">Jordi</div><div class=3D"gmail_extra"><br></div><=
/div></div></div></div></blockquote></div></div>

--000000000000efb4e2056f6e10a0--


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From: nalini elkins <nalini.elkins@e-dco.com>
Date: Mon, 25 Jun 2018 09:47:58 +0530
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Subject: [v6ops] IPv6 and Enterprises
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All,


If any in v6ops are interested, we discuss topics with enterprises at our
"New Technology Briefings" which have generally been co-located with IETF
meetings.  The next one will be in Montreal on Saturday, July 14th.   I
believe we could take about 5 or 6 people.  Please respond to me unicast if
you are interested.   It would be a good opportunity to meet / talk with
enterprises f2f.


IPv6 implementation at "brick and mortar" enterprise networks has lagged
that of other sectors.  We will be discussing reasons to migrate.  Our
current lineup of speaker for IPv6 include:=E2=80=8B



   -

   Improved Response Time with IPv6: Lee Howard
   -

   SDWan and IPv6 : Friso Feenstra (RaboBank)
   -

   IPv6-Only Performance and Diagnostic Information: Mike Ackermann (Blue
   Cross Blue Shield of Michigan)
   -

   IPv6 Business at Scale: E. Marie Brierley (former project manager at
   Cisco)
   -

   Getting IPv6 from ARIN Is Easy: John Sweeting, Senior Director of
   Registration Services,  American Registry for Internet Numbers (ARIN)


We will also be discussing other topics: Routing & IPWave.

Please contact me, if you are interested & I will give you the location /
registration information.

--=20
Thanks,
Nalini Elkins
President
Enterprise Data Center Operators
www.e-dco.com

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<div dir=3D"ltr">

<p class=3D"gmail-font_8" style=3D"margin:0px;padding:0px;border:0px;outlin=
e:0px;vertical-align:baseline;background:0px 0px;font-variant-numeric:norma=
l;font-variant-east-asian:normal;font-stretch:normal;font-size:14px;line-he=
ight:normal;font-family:avenir-lt-w01_35-light1475496,sans-serif;color:rgb(=
96,94,94);text-align:left;text-decoration-style:initial;text-decoration-col=
or:initial">All,</p><p class=3D"gmail-font_8" style=3D"margin:0px;padding:0=
px;border:0px;outline:0px;vertical-align:baseline;background:0px 0px;font-v=
ariant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;fo=
nt-size:14px;line-height:normal;font-family:avenir-lt-w01_35-light1475496,s=
ans-serif;color:rgb(96,94,94);text-align:left;text-decoration-style:initial=
;text-decoration-color:initial"><br></p><p class=3D"gmail-font_8" style=3D"=
margin:0px;padding:0px;border:0px;outline:0px;vertical-align:baseline;backg=
round:0px 0px;font-variant-numeric:normal;font-variant-east-asian:normal;fo=
nt-stretch:normal;font-size:14px;line-height:normal;font-family:avenir-lt-w=
01_35-light1475496,sans-serif;color:rgb(96,94,94);text-align:left;text-deco=
ration-style:initial;text-decoration-color:initial">If any in v6ops are int=
erested, we discuss topics with enterprises at our &quot;New Technology Bri=
efings&quot; which have generally been co-located with IETF meetings.=C2=A0=
 The next one will be in Montreal on Saturday, July 14th.=C2=A0 =C2=A0<span=
 style=3D"background-color:rgb(255,255,255);text-decoration-style:initial;t=
ext-decoration-color:initial;float:none;display:inline">I believe we could =
take about 5 or 6 people.=C2=A0 Please respond to me unicast if you are int=
erested.=C2=A0 =C2=A0It would be a good opportunity to meet / talk with ent=
erprises f2f.</span></p><p class=3D"gmail-font_8" style=3D"margin:0px;paddi=
ng:0px;border:0px;outline:0px;vertical-align:baseline;background:0px 0px;fo=
nt-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:norma=
l;font-size:14px;line-height:normal;font-family:avenir-lt-w01_35-light14754=
96,sans-serif;color:rgb(96,94,94);text-align:left;text-decoration-style:ini=
tial;text-decoration-color:initial"><br></p><p class=3D"gmail-font_8" style=
=3D"margin:0px;padding:0px;border:0px;outline:0px;vertical-align:baseline;b=
ackground:0px 0px;font-variant-numeric:normal;font-variant-east-asian:norma=
l;font-stretch:normal;font-size:14px;line-height:normal;font-family:avenir-=
lt-w01_35-light1475496,sans-serif;color:rgb(96,94,94);text-align:left;text-=
decoration-style:initial;text-decoration-color:initial">IPv6 implementation=
 at &quot;brick and mortar&quot; enterprise networks has lagged that of oth=
er sectors.=C2=A0 We will be discussing reasons to migrate.=C2=A0 Our curre=
nt lineup of speaker for IPv6 include:=E2=80=8B</p><p class=3D"gmail-font_8=
" style=3D"margin:0px;padding:0px;border:0px;outline:0px;vertical-align:bas=
eline;background:0px 0px;font-variant-numeric:normal;font-variant-east-asia=
n:normal;font-stretch:normal;font-size:14px;line-height:normal;font-family:=
avenir-lt-w01_35-light1475496,sans-serif;color:rgb(96,94,94);text-align:lef=
t;text-decoration-style:initial;text-decoration-color:initial">=C2=A0</p><u=
l class=3D"gmail-font_8" style=3D"margin:0px 0px 0px 0.5em;padding:0px 0px =
0px 1.3em;border:0px;outline:0px;vertical-align:baseline;background:0px 0px=
;list-style:disc;font-variant-numeric:normal;font-variant-east-asian:normal=
;font-stretch:normal;font-size:14px;line-height:normal;font-family:avenir-l=
t-w01_35-light1475496,sans-serif;color:rgb(96,94,94);text-align:left;text-d=
ecoration-style:initial;text-decoration-color:initial"><li style=3D"margin:=
0px;padding:0px;border:0px;outline:0px;vertical-align:baseline;background:0=
px 0px;font-style:inherit;font-weight:inherit;line-height:inherit;letter-sp=
acing:normal"><p class=3D"gmail-font_8" style=3D"margin:0px;padding:0px;bor=
der:0px;outline:0px;vertical-align:baseline;background:0px 0px;font:14px av=
enir-lt-w01_35-light1475496,sans-serif;color:rgb(96,94,94);letter-spacing:n=
ormal">Improved Response Time with IPv6:<span style=3D"margin:0px;padding:0=
px;border:0px;outline:0px;vertical-align:baseline;background:0px 0px;font-w=
eight:bold"><span>=C2=A0</span>Lee Howard</span></p></li><li style=3D"margi=
n:0px;padding:0px;border:0px;outline:0px;vertical-align:baseline;background=
:0px 0px;font-style:inherit;font-weight:inherit;line-height:inherit;letter-=
spacing:normal"><p class=3D"gmail-font_8" style=3D"margin:0px;padding:0px;b=
order:0px;outline:0px;vertical-align:baseline;background:0px 0px;font:14px =
avenir-lt-w01_35-light1475496,sans-serif;color:rgb(96,94,94);letter-spacing=
:normal">SDWan and IPv6 :<span>=C2=A0</span><span style=3D"margin:0px;paddi=
ng:0px;border:0px;outline:0px;vertical-align:baseline;background:0px 0px;fo=
nt-weight:bold">Friso Feenstra</span><span>=C2=A0</span>(RaboBank)</p></li>=
<li style=3D"margin:0px;padding:0px;border:0px;outline:0px;vertical-align:b=
aseline;background:0px 0px;font-style:inherit;font-weight:inherit;line-heig=
ht:inherit;letter-spacing:normal"><p class=3D"gmail-font_8" style=3D"margin=
:0px;padding:0px;border:0px;outline:0px;vertical-align:baseline;background:=
0px 0px;font:14px avenir-lt-w01_35-light1475496,sans-serif;color:rgb(96,94,=
94);letter-spacing:normal">IPv6-Only Performance and Diagnostic Information=
:<span>=C2=A0</span><span style=3D"margin:0px;padding:0px;border:0px;outlin=
e:0px;vertical-align:baseline;background:0px 0px;font-weight:bold">Mike Ack=
ermann</span><span>=C2=A0</span>(Blue Cross Blue Shield of Michigan)</p></l=
i><li style=3D"margin:0px;padding:0px;border:0px;outline:0px;vertical-align=
:baseline;background:0px 0px;font-style:inherit;font-weight:inherit;line-he=
ight:inherit;letter-spacing:normal"><p class=3D"gmail-font_8" style=3D"marg=
in:0px;padding:0px;border:0px;outline:0px;vertical-align:baseline;backgroun=
d:0px 0px;font:14px avenir-lt-w01_35-light1475496,sans-serif;color:rgb(96,9=
4,94);letter-spacing:normal">IPv6 Business at Scale:<span>=C2=A0</span><spa=
n style=3D"margin:0px;padding:0px;border:0px;outline:0px;vertical-align:bas=
eline;background:0px 0px;font-weight:bold">E. Marie Brierley</span><span>=
=C2=A0</span>(former project manager at Cisco)</p></li><li style=3D"margin:=
0px;padding:0px;border:0px;outline:0px;vertical-align:baseline;background:0=
px 0px;font-style:inherit;font-weight:inherit;line-height:inherit;letter-sp=
acing:normal"><p class=3D"gmail-font_8" style=3D"margin:0px;padding:0px;bor=
der:0px;outline:0px;vertical-align:baseline;background:0px 0px;font:14px av=
enir-lt-w01_35-light1475496,sans-serif;color:rgb(96,94,94);letter-spacing:n=
ormal">Getting IPv6 from=C2=A0ARIN Is Easy:=C2=A0<span style=3D"margin:0px;=
padding:0px;border:0px;outline:0px;vertical-align:baseline;background:0px 0=
px;font-weight:bold">John Sweeting</span>,=C2=A0Senior Director of Registra=
tion Services,=C2=A0=C2=A0American Registry for Internet Numbers (ARIN)=C2=
=A0</p></li></ul><div><font color=3D"#605e5e" face=3D"avenir-lt-w01_35-ligh=
t1475496, sans-serif"><span style=3D"font-size:14px"><br></span></font></di=
v><div><font color=3D"#605e5e" face=3D"avenir-lt-w01_35-light1475496, sans-=
serif"><span style=3D"font-size:14px">We will also be discussing other topi=
cs: Routing &amp; IPWave.</span></font></div>

<div><br></div>Please contact me, if you are interested &amp; I will give y=
ou the location / registration information.<br clear=3D"all"><div><br></div=
>-- <br><div class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><=
div dir=3D"ltr"><div><div dir=3D"ltr"><div style=3D"font-size:12.8px">Thank=
s,</div><div style=3D"font-size:12.8px">Nalini Elkins</div><div style=3D"fo=
nt-size:12.8px">President</div><div style=3D"font-size:12.8px">Enterprise D=
ata Center Operators</div><div style=3D"font-size:12.8px"><a href=3D"http:/=
/www.e-dco.com" target=3D"_blank">www.e-dco.com</a></div><div><br></div></d=
iv></div></div></div>
</div>

--000000000000a8e72f056f6faa37--


From nobody Mon Jun 25 00:40:21 2018
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Subject: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-04.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IPv6 Operations WG of the IETF.

        Title           : Requirements for IPv6 Customer Edge Routers to Support IPv4 Connectivity as-a-Service
        Authors         : Jordi Palet Martinez
                          Hans M.-H. Liu
                          Masanobu Kawashima
	Filename        : draft-ietf-v6ops-transition-ipv4aas-04.txt
	Pages           : 21
	Date            : 2018-06-25

Abstract:
   This document specifies the IPv4 service continuity requirements for
   an IPv6 Customer Edge (CE) router, either provided by the service
   provider or thru the retail market.

   Specifically, this document extends the "Basic Requirements for IPv6
   Customer Edge Routers" in order to allow the provisioning of IPv6
   transition services for the support of "IPv4 as-a-Service" (IPv4aaS)
   by means of new transition mechanisms.  The document only covers
   transition technologies for delivering IPv4 in IPv6-only access
   networks, commonly called "IPv4 as-a-Service" (IPv4aaS), as required
   in a world where IPv4 addresses are no longer available, so hosts in
   the customer LANs with IPv4-only or IPv6-only applications or
   devices, requiring to communicate with IPv4-only services at the
   Internet, are still able to do so.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas-04
https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-transition-ipv4aas-04

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-v6ops-transition-ipv4aas-04


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


From nobody Mon Jun 25 00:51:59 2018
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Date: Mon, 25 Jun 2018 09:51:48 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: <v6ops@ietf.org>
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Hi all,



We have uploaded a new version of this draft.



No major changes, just the text for the transition requirements (but not an=
 actual change from the previous version).



https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/?inclu=
de_text=3D1



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de <internet-drafts@ietf.org>

Fecha: lunes, 25 de junio de 2018, 9:42

Para: <i-d-announce@ietf.org>

CC: <v6ops@ietf.org>

Asunto: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-04.txt



   =20

    A New Internet-Draft is available from the on-line Internet-Drafts dire=
ctories.

    This draft is a work item of the IPv6 Operations WG of the IETF.

   =20

            Title           : Requirements for IPv6 Customer Edge Routers t=
o Support IPv4 Connectivity as-a-Service

            Authors         : Jordi Palet Martinez

                              Hans M.-H. Liu

                              Masanobu Kawashima

    	Filename        : draft-ietf-v6ops-transition-ipv4aas-04.txt

    	Pages           : 21

    	Date            : 2018-06-25

   =20

    Abstract:

       This document specifies the IPv4 service continuity requirements for

       an IPv6 Customer Edge (CE) router, either provided by the service

       provider or thru the retail market.

   =20

       Specifically, this document extends the "Basic Requirements for IPv6

       Customer Edge Routers" in order to allow the provisioning of IPv6

       transition services for the support of "IPv4 as-a-Service" (IPv4aaS)

       by means of new transition mechanisms.  The document only covers

       transition technologies for delivering IPv4 in IPv6-only access

       networks, commonly called "IPv4 as-a-Service" (IPv4aaS), as required

       in a world where IPv4 addresses are no longer available, so hosts in

       the customer LANs with IPv4-only or IPv6-only applications or

       devices, requiring to communicate with IPv4-only services at the

       Internet, are still able to do so.

   =20

   =20

    The IETF datatracker status page for this draft is:

    https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/

   =20

    There are also htmlized versions available at:

    https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas-04

    https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-transition-ipv4a=
as-04

   =20

    A diff from the previous version is available at:

    https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-v6ops-transition-ipv4aas=
-04

   =20

   =20

    Please note that it may take a couple of minutes from the time of submi=
ssion

    until the htmlized version and diff are available at tools.ietf.org.

   =20

    Internet-Drafts are also available by anonymous FTP at:

    ftp://ftp.ietf.org/internet-drafts/

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




**********************************************
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From nobody Mon Jun 25 10:27:18 2018
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From: "Bajpai, Vaibhav" <vaibhav.bajpai@tum.de>
To: "v6ops@ietf.org" <v6ops@ietf.org>
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Subject: [v6ops] on google v6 stats
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Hello,

re: https://www.google.com/intl/en/ipv6/statistics.html

a] How does Google count 'users' on the Google v6 adoption page? What
happens when a user has (multiple) v6 privacy addresses that change
with time, does each privacy address count as a single user?

b] The rate of adoption of Teredo/6to4 started increasing in Apr/2017
with an exponential jump in Apr/2018, with a recent sudden drop back
to zero. Does anybody have insights on what is causing this observation
or is this a measurement error?

https://goo.gl/CwnKSm

Thanks!

-- Vaibhav

------------------------------
Vaibhav Bajpai
www.vaibhavbajpai.com

Postdoctoral Fellow
Technische Universit=C3=A4t M=C3=BCnchen
------------------------------


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To: v6ops@ietf.org
References: <152991240953.6305.13394976711538807769@ietfa.amsl.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Date: Tue, 26 Jun 2018 08:24:19 +1200
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/MOVok6dGhYsJ0H0bqFN_zpiDO_I>
Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-04.txt
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Hi,

>    TRANS-2:  The IPv6 Transition CE Router MUST have a GUI and/or CLI
>              option to manually enable/disable each of the supported
>              transition mechanisms.

I think this should be slightly extended to say "GUI, CLI and/or API option".
In fact an API seems like the fundamental requirement, so that any kind
of management mechanism could be applied.

Regards
   Brian Carpenter



On 25/06/2018 19:40, internet-drafts@ietf.org wrote:
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the IPv6 Operations WG of the IETF.
> 
>         Title           : Requirements for IPv6 Customer Edge Routers to Support IPv4 Connectivity as-a-Service
>         Authors         : Jordi Palet Martinez
>                           Hans M.-H. Liu
>                           Masanobu Kawashima
> 	Filename        : draft-ietf-v6ops-transition-ipv4aas-04.txt
> 	Pages           : 21
> 	Date            : 2018-06-25
> 
> Abstract:
>    This document specifies the IPv4 service continuity requirements for
>    an IPv6 Customer Edge (CE) router, either provided by the service
>    provider or thru the retail market.
> 
>    Specifically, this document extends the "Basic Requirements for IPv6
>    Customer Edge Routers" in order to allow the provisioning of IPv6
>    transition services for the support of "IPv4 as-a-Service" (IPv4aaS)
>    by means of new transition mechanisms.  The document only covers
>    transition technologies for delivering IPv4 in IPv6-only access
>    networks, commonly called "IPv4 as-a-Service" (IPv4aaS), as required
>    in a world where IPv4 addresses are no longer available, so hosts in
>    the customer LANs with IPv4-only or IPv6-only applications or
>    devices, requiring to communicate with IPv4-only services at the
>    Internet, are still able to do so.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/
> 
> There are also htmlized versions available at:
> https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas-04
> https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-transition-ipv4aas-04
> 
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-v6ops-transition-ipv4aas-04
> 
> 
> Please note that it may take a couple of minutes from the time of submission
> until the htmlized version and diff are available at tools.ietf.org.
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> .
> 


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From: Lee Howard <lee@asgard.org>
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Subject: Re: [v6ops] on google v6 stats
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On 06/25/2018 11:26 AM, Bajpai, Vaibhav wrote:
> Hello,
>
> re: https://www.google.com/intl/en/ipv6/statistics.html
>
> a] How does Google count 'users' on the Google v6 adoption page? What
> happens when a user has (multiple) v6 privacy addresses that change
> with time, does each privacy address count as a single user?

I am not authoritative, but here's what they say:
*Google*: We measure IPv6 adoption among Google users by adding 
measurement JavaScript to a random sample of visits to various Google 
properties. The methodology is similar to that described in our 
paper,Evaluating IPv6 adoption in the Internet 
<http://research.google.com/pubs/pub36240.html>. The JavaScript uses 
HTTP to fetch a URL from an IPv4-only hostname and a URL from a 
dual-stack hostname, in random order, and then reports the results. The 
measurement is attributed to the ASN that originates the user's IPv4 
address. Measurement endpoints use the same infrastructure that serve 
regular Google traffic.
http://www.worldipv6launch.org/measurements/




>
> b] The rate of adoption of Teredo/6to4 started increasing in Apr/2017
> with an exponential jump in Apr/2018, with a recent sudden drop back
> to zero. Does anybody have insights on what is causing this observation
> or is this a measurement error?
>
> https://goo.gl/CwnKSm


Google shows .03% in April 2017, a brief spike in May 2018 to .011%%, 
and now down to 0.00%.
https://www.google.com/intl/en/ipv6/statistics.html#tab=ipv6-adoption&tab=ipv6-adoption

Facebook looks similar, except for that one spike. I would treat that as 
an anomaly, the kind of noise one expects to see in live data. And I'd 
say 0.00% is pretty good.

Lee

>
> Thanks!
>
> -- Vaibhav
>
> ------------------------------
> Vaibhav Bajpai
> www.vaibhavbajpai.com
>
> Postdoctoral Fellow
> Technische Universität München
> ------------------------------
>
>
>
> _______________________________________________
> v6ops mailing list
> v6ops@ietf.org
> https://www.ietf.org/mailman/listinfo/v6ops


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<html>
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    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  </head>
  <body text="#000000" vlink="#551A8B" bgcolor="#ffffff" alink="#EE0000"
    link="#0B6CDA">
    <p><br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 06/25/2018 11:26 AM, Bajpai, Vaibhav
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:e1eed28d-d784-4e48-b0a5-c130bbe48c3c@BADWLRZ-SWMBX02.ads.mwn.de">
      <pre wrap="">Hello,

re: <a class="moz-txt-link-freetext" href="https://www.google.com/intl/en/ipv6/statistics.html">https://www.google.com/intl/en/ipv6/statistics.html</a>

a] How does Google count 'users' on the Google v6 adoption page? What
happens when a user has (multiple) v6 privacy addresses that change
with time, does each privacy address count as a single user?</pre>
    </blockquote>
    <br>
    I am not authoritative, but here's what they say:<br>
    <strong style="margin: 0px; padding: 0px; border: 0px none; outline:
      0px none; font-size: 19.2px; background: rgb(238, 238, 238) none
      repeat scroll 0% 0%; font-family: futura-pt,sans-serif;
      font-style: normal; font-variant-ligatures: normal;
      font-variant-caps: normal; letter-spacing: normal; text-align:
      start; text-indent: 0px; text-transform: none; white-space:
      normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;
      text-decoration-style: initial; text-decoration-color: initial;">Google</strong><span
      style="font-family: futura-pt,sans-serif; font-size: 19.2px;
      font-style: normal; font-variant-ligatures: normal;
      font-variant-caps: normal; font-weight: 300; letter-spacing:
      normal; text-align: start; text-indent: 0px; text-transform: none;
      white-space: normal; word-spacing: 0px; -webkit-text-stroke-width:
      0px; background-color: rgb(238, 238, 238); text-decoration-style:
      initial; text-decoration-color: initial; display: inline !
      important; float: none;">: We measure IPv6 adoption among Google
      users by adding measurement JavaScript to a random sample of
      visits to various Google properties. The methodology is similar to
      that described in our paper,<span> </span></span><a
      href="http://research.google.com/pubs/pub36240.html"
      target="_blank" style="margin: 0px; padding: 0px; font-size:
      19.2px; background: rgb(238, 238, 238) none repeat scroll 0% 0%;
      font-family: futura-pt,sans-serif; font-style: normal;
      font-variant-ligatures: normal; font-variant-caps: normal;
      font-weight: 300; letter-spacing: normal; text-align: start;
      text-indent: 0px; text-transform: none; white-space: normal;
      word-spacing: 0px; -webkit-text-stroke-width: 0px;">Evaluating
      IPv6 adoption in the Internet</a><span style="color: rgb(33, 34,
      33); font-family: futura-pt, sans-serif; font-size: 19.2px;
      font-style: normal; font-variant-ligatures: normal;
      font-variant-caps: normal; font-weight: 300; letter-spacing:
      normal; orphans: 2; text-align: start; text-indent: 0px;
      text-transform: none; white-space: normal; widows: 2;
      word-spacing: 0px; -webkit-text-stroke-width: 0px;
      background-color: rgb(238, 238, 238); text-decoration-style:
      initial; text-decoration-color: initial; display: inline
      !important; float: none;">. The JavaScript uses HTTP to fetch a
      URL from an IPv4-only hostname and a URL from a dual-stack
      hostname, in random order, and then reports the results. The
      measurement is attributed to the ASN that originates the user's
      IPv4 address. Measurement endpoints use the same infrastructure
      that serve regular Google traffic.<br>
      <a class="moz-txt-link-freetext" href="http://www.worldipv6launch.org/measurements/">http://www.worldipv6launch.org/measurements/</a><br>
      <br>
      <br>
      <br>
      <br>
    </span>
    <blockquote type="cite"
cite="mid:e1eed28d-d784-4e48-b0a5-c130bbe48c3c@BADWLRZ-SWMBX02.ads.mwn.de">
      <pre wrap="">

b] The rate of adoption of Teredo/6to4 started increasing in Apr/2017
with an exponential jump in Apr/2018, with a recent sudden drop back
to zero. Does anybody have insights on what is causing this observation
or is this a measurement error?

<a class="moz-txt-link-freetext" href="https://goo.gl/CwnKSm">https://goo.gl/CwnKSm</a></pre>
    </blockquote>
    <br>
    <br>
    Google shows .03% in April 2017, a brief spike in May 2018 to
    .011%%, and now down to 0.00%.<br>
<a class="moz-txt-link-freetext" href="https://www.google.com/intl/en/ipv6/statistics.html#tab=ipv6-adoption&amp;tab=ipv6-adoption">https://www.google.com/intl/en/ipv6/statistics.html#tab=ipv6-adoption&amp;tab=ipv6-adoption</a><br>
    <br>
    Facebook looks similar, except for that one spike. I would treat
    that as an anomaly, the kind of noise one expects to see in live
    data. And I'd say 0.00% is pretty good.<br>
    <br>
    Lee<br>
    <br>
    <blockquote type="cite"
cite="mid:e1eed28d-d784-4e48-b0a5-c130bbe48c3c@BADWLRZ-SWMBX02.ads.mwn.de">
      <pre wrap="">

Thanks!

-- Vaibhav

------------------------------
Vaibhav Bajpai
<a class="moz-txt-link-abbreviated" href="http://www.vaibhavbajpai.com">www.vaibhavbajpai.com</a>

Postdoctoral Fellow
Technische Universität München
------------------------------

</pre>
    </blockquote>
    <blockquote type="cite"
cite="mid:e1eed28d-d784-4e48-b0a5-c130bbe48c3c@BADWLRZ-SWMBX02.ads.mwn.de"><!--'"--><br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
v6ops mailing list
<a class="moz-txt-link-abbreviated" href="mailto:v6ops@ietf.org">v6ops@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mailman/listinfo/v6ops</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>

--------------8AF11C9A03BE2FBA45343137--


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Subject: [v6ops] https://datatracker.ietf.org/doc/draft-jaeggli-v6ops-indefensible-nd/ - explination
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Hi,

I submitted this draft as a talking point to the discussion in 6man
related to IID prefix length.=C2=A0

=C2=A0SAILing LAPs - currently at 72 messages and counting

The draft is specifically related to work previously done in v6ops (rfc
6583) rather than 6man and does not itself propose an protocol changes
hence my inclusion of the v6ops label.

I have not specific goals for advancement or adoption at this time apart
from making a point about NDP mitigitations and in particular variable
length subnet masks.

Thanks

joel



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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
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Thanks a lot Brian,



Yes, makes a lot of sense!



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de Brian E Carpenter <brian.e.=
carpenter@gmail.com>

Fecha: lunes, 25 de junio de 2018, 22:25

Para: <v6ops@ietf.org>

Asunto: Re: [v6ops] I-D Action: draft-ietf-v6ops-transition-ipv4aas-04.txt



    Hi,

   =20

    >    TRANS-2:  The IPv6 Transition CE Router MUST have a GUI and/or CLI

    >              option to manually enable/disable each of the supported

    >              transition mechanisms.

   =20

    I think this should be slightly extended to say "GUI, CLI and/or API op=
tion".

    In fact an API seems like the fundamental requirement, so that any kind

    of management mechanism could be applied.

   =20

    Regards

       Brian Carpenter

   =20

   =20

   =20

    On 25/06/2018 19:40, internet-drafts@ietf.org wrote:

    >=20

    > A New Internet-Draft is available from the on-line Internet-Drafts di=
rectories.

    > This draft is a work item of the IPv6 Operations WG of the IETF.

    >=20

    >         Title           : Requirements for IPv6 Customer Edge Routers=
 to Support IPv4 Connectivity as-a-Service

    >         Authors         : Jordi Palet Martinez

    >                           Hans M.-H. Liu

    >                           Masanobu Kawashima

    > 	Filename        : draft-ietf-v6ops-transition-ipv4aas-04.txt

    > 	Pages           : 21

    > 	Date            : 2018-06-25

    >=20

    > Abstract:

    >    This document specifies the IPv4 service continuity requirements f=
or

    >    an IPv6 Customer Edge (CE) router, either provided by the service

    >    provider or thru the retail market.

    >=20

    >    Specifically, this document extends the "Basic Requirements for IP=
v6

    >    Customer Edge Routers" in order to allow the provisioning of IPv6

    >    transition services for the support of "IPv4 as-a-Service" (IPv4aa=
S)

    >    by means of new transition mechanisms.  The document only covers

    >    transition technologies for delivering IPv4 in IPv6-only access

    >    networks, commonly called "IPv4 as-a-Service" (IPv4aaS), as requir=
ed

    >    in a world where IPv4 addresses are no longer available, so hosts =
in

    >    the customer LANs with IPv4-only or IPv6-only applications or

    >    devices, requiring to communicate with IPv4-only services at the

    >    Internet, are still able to do so.

    >=20

    >=20

    > The IETF datatracker status page for this draft is:

    > https://datatracker.ietf.org/doc/draft-ietf-v6ops-transition-ipv4aas/

    >=20

    > There are also htmlized versions available at:

    > https://tools.ietf.org/html/draft-ietf-v6ops-transition-ipv4aas-04

    > https://datatracker.ietf.org/doc/html/draft-ietf-v6ops-transition-ipv=
4aas-04

    >=20

    > A diff from the previous version is available at:

    > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-v6ops-transition-ipv4a=
as-04

    >=20

    >=20

    > Please note that it may take a couple of minutes from the time of sub=
mission

    > until the htmlized version and diff are available at tools.ietf.org.

    >=20

    > Internet-Drafts are also available by anonymous FTP at:

    > ftp://ftp.ietf.org/internet-drafts/

    >=20

    > _______________________________________________

    > I-D-Announce mailing list

    > I-D-Announce@ietf.org

    > https://www.ietf.org/mailman/listinfo/i-d-announce

    > Internet-Draft directories: http://www.ietf.org/shadow.html

    > or ftp://ftp.ietf.org/ietf/1shadow-sites.txt

    > .

    >=20

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




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From: "Bajpai, Vaibhav" <vaibhav.bajpai@tum.de>
To: Lee Howard <lee@asgard.org>
CC: "Bajpai, Vaibhav" <vaibhav.bajpai@tum.de>, "v6ops@ietf.org" <v6ops@ietf.org>
Thread-Topic: [v6ops] on google v6 stats
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Date: Tue, 26 Jun 2018 09:45:23 +0000
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Subject: Re: [v6ops] on google v6 stats
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Hello,

>> re:
>> https://www.google.com/intl/en/ipv6/statistics.html
>>=20
>>=20
>> a] How does Google count 'users' on the Google v6 adoption page? What
>> happens when a user has (multiple) v6 privacy addresses that change
>> with time, does each privacy address count as a single user?
>>=20
>=20
> I am not authoritative, but here's what they say:
> Google: We measure IPv6 adoption among Google users by adding =
measurement JavaScript to a random sample of visits to various Google =
properties. The methodology is similar to that described in our paper, =
Evaluating IPv6 adoption in the Internet. The JavaScript uses HTTP to =
fetch a URL from an IPv4-only hostname and a URL from a dual-stack =
hostname, in random order, and then reports the results. The measurement =
is attributed to the ASN that originates the user's IPv4 address. =
Measurement endpoints use the same infrastructure that serve regular =
Google traffic.
> http://www.worldipv6launch.org/measurements

I am not sure if the methodology used in the 2010 paper is
still valid. For one, both hostnames do not have either A
or AAAA records anymore (dualstack.ipv6-exp.l.google.com,
ipv4.ipv6-exp.l.google.com).


>> b] The rate of adoption of Teredo/6to4 started increasing in Apr/2017
>> with an exponential jump in Apr/2018, with a recent sudden drop back
>> to zero. Does anybody have insights on what is causing this =
observation
>> or is this a measurement error?
>>=20
>> https://goo.gl/CwnKSm
>=20
>=20
> Google shows .03% in April 2017, a brief spike in May 2018 to .011%%, =
and now down to 0.00%.
> =
https://www.google.com/intl/en/ipv6/statistics.html#tab=3Dipv6-adoption&ta=
b=3Dipv6-adoption
>=20
> Facebook looks similar, except for that one spike. I would treat that =
as
> an anomaly, the kind of noise one expects to see in live data. And I'd =
say 0.00% is pretty good.

Oh, how do I see the facebook teredo/6to4 plot? This [a] seems
to show overall v6 adoption.

a] https://www.facebook.com/ipv6

> Lee

-- Vaibhav

------------------------------
Vaibhav Bajpai
www.vaibhavbajpai.com

Postdoctoral Fellow
Technische Universit=C3=A4t M=C3=BCnchen
------------------------------


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> b] The rate of adoption of Teredo/6to4 started increasing in Apr/2017
> with an exponential jump in Apr/2018, with a recent sudden drop back
> to zero. Does anybody have insights on what is causing this observation
> or is this a measurement error?

yeah, basically measurement error

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From: "Bajpai, Vaibhav" <vaibhav.bajpai@tum.de>
To: Erik Kline <ek@google.com>
CC: "Bajpai, Vaibhav" <vaibhav.bajpai@tum.de>, "v6ops@ietf.org WG" <v6ops@ietf.org>
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Hello,

> On 26. Jun 2018, at 13:14, Erik Kline <ek@google.com> wrote:
>=20
>> b] The rate of adoption of Teredo/6to4 started increasing in Apr/2017
>> with an exponential jump in Apr/2018, with a recent sudden drop back
>> to zero. Does anybody have insights on what is causing this =
observation
>> or is this a measurement error?
>=20
> yeah, basically measurement error

Thank you.

-- Vaibhav

------------------------------
Vaibhav Bajpai
www.vaibhavbajpai.com

Postdoctoral Fellow
Technische Universit=C3=A4t M=C3=BCnchen
------------------------------


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Date: Tue, 26 Jun 2018 20:46:40 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
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Hi all,



I just published a new version of this document:



https://datatracker.ietf.org/doc/draft-palet-v6ops-nat64-deployment/?includ=
e_text=3D1



I've tried to follow all the discussions bits that we had in the list, spec=
ially the very detailed input from Andrew (thanks again for that). Hopefull=
y I didn't forgot anything.



Tried to make sure that the document clearly says that some of the scenario=
s are "special cases", and that using or not DNS64 is an option, even if it=
 means breaking DNSSEC (in case there is host validation), which may be ass=
umable in some scenarios.



I've added a comparison among all the scenarios (and sub-scenarios, in tota=
l 12), revised all the text, rearranged the sections, etc.



I think now the document is easier to read/follow and more useful for provi=
ders (and enterprises) that can use the document for taking decisions on do=
ing one scenario or another one, being cautious about every possible issue.



I've added some other sections (a couple of annexes) that have been suggest=
ed in private, as needed by ISPs willing to deploy it.



Regards,

Jordi

=20

=20





=EF=BB=BF-----Mensaje original-----

De: <internet-drafts@ietf.org>

Fecha: martes, 26 de junio de 2018, 20:39

Para: Jordi Palet <jordi.palet@theipv6company.com>, Jordi Palet Martinez <j=
ordi.palet@theipv6company.com>

Asunto: New Version Notification for draft-palet-v6ops-nat64-deployment-02.=
txt



   =20

    A new version of I-D, draft-palet-v6ops-nat64-deployment-02.txt

    has been successfully submitted by Jordi Palet Martinez and posted to t=
he

    IETF repository.

   =20

    Name:		draft-palet-v6ops-nat64-deployment

    Revision:	02

    Title:		NAT64/464XLAT Deployment Guidelines in Operator and Enterprise =
Networks

    Document date:	2018-06-26

    Group:		Individual Submission

    Pages:		31

    URL:            https://www.ietf.org/internet-drafts/draft-palet-v6ops-=
nat64-deployment-02.txt

    Status:         https://datatracker.ietf.org/doc/draft-palet-v6ops-nat6=
4-deployment/

    Htmlized:       https://tools.ietf.org/html/draft-palet-v6ops-nat64-dep=
loyment-02

    Htmlized:       https://datatracker.ietf.org/doc/html/draft-palet-v6ops=
-nat64-deployment

    Diff:           https://www.ietf.org/rfcdiff?url2=3Ddraft-palet-v6ops-n=
at64-deployment-02

   =20

    Abstract:

       This document describes how NAT64 and 464XLAT can be deployed in an

       IPv6 operator (cellular and broadband) or enterprise network and the

       issues to be considered when having an IPv6-only access link,

       regarding: a) DNS64, b) applications or devices that use literal IPv=
4

       addresses or non-IPv6 compliant APIs, and c) IPv4-only hosts or

       applications.

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From: Fred Baker <fredbaker.ietf@gmail.com>
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Chair comment: I am interested in making this draft a working group =
draft. I think there is merit in it to do so. However, following our =
usual process, I need agreement from the working group. Consider this a =
solicitation for that. To do so, I'm looking for comments, supportive or =
otherwise, especially from operators. To respond to Barbara's question =
that she raised with ipv4aas, making it a working group document doesn't =
mean it's done, it means it's a work item as opposed to a suggestion to =
the working group.

The rest of this is sans hats.

Thanks for your new draft. Let me say that I am increasingly hearing =
about ISPs (cellular and broadband) that, in the words of one, "just =
don't want to allocate IPv4 addresses anymore", and are taking important =
steps toward turning IPv4 off within their networks in favor of IPv4 as =
a service. As you know, this falls into a couple of categories - those =
that are willing to offer a client-only IPv4-over-IPv6 or IPv4-cum-IPv6 =
service, and those that need to be able to somehow still put an IPv4 =
address into an A record (such as a company like Lumix that uses Dynamic =
DNS Update and firewall hole-punching to allow a residential user to =
access their surveillance system from an Android/iPhone app) and use it =
to send a message to the IPv4 server. So IMHO, this is an important =
draft, and it would be useful to get operator comment on it.

I'm reviewing the draft. I'll bring up nits inline, and I may have some =
other thoughts as well.

> Abstract
>=20
>    This document describes how NAT64 and 464XLAT can be deployed in an
>    IPv6 operator (cellular and broadband) or enterprise network and =
the

I suspect that this would read better as "IPv6 network, whether cellular =
ISP, broadband ISP, or enterprise".

> 1.  Introduction

>    To avoid changes in both, the IPv6-only hosts and the IPv4-only
>    server, NAT64 requires also the use of a DNS64 ([RFC6147]), in =
charge
>    for the synthesis of AAAA records from the A records.

I would disagree that NAT64 "requires" DNS64. NAT64 requires that the =
destination IPv6 address contain an embedded IPv4 address. The source of =
that IPv4-embedded IPv6 address is up to the system that sent the =
packet. A CLAT (stateless translation as in RFC 7915) uses address =
synthesis with a PLAT translation prefix. MAP-T adds NAPT44 =
functionality to that with respect to the outbound IPv4 source address. =
A random IPv6 host accessing an IPv4-only peer might use DNS64, and the =
AAAA records might simply exist in DNS containing an IPv4-embedded IPv6 =
address. But the NAT64 function doesn't use, nor does it require, DNS64.

BTW, SIIT-DC makes rather a point that RFC 6146 is a per-session =
(effectively NAPT) translator, and provides translation strictly at the =
IP layer. I suspect that is also a valid configuration, one that needs =
to be supported. In the 464XLAT case, I think it falls out, but I'll =
have to think about MAP-T.

> 3.  NAT64 Deployment Scenarios

>    Consequently, the perspective in this document is to broader those

"broaden"

> 3.1.2.  Service Provider offering 464XLAT, with DNS64

Pictorial image of what I'm picturing:

                          +----+                +----+
                          |DNS |     +-----+    |DNS |
                          |IPv6|     |DNS64|    |IPv4|
                          +--+-+     +--+--+    +--+-+
  +------+ v6 +------+       |          |          |
  |      +----+      |    ,--+--.       |       ,--+--.
  |Dual  |    | IPv6 |   /       \    ,-+-.    /       \
  |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )
  |Device|v4|C|      |   \Network/`.  `---'    \Network/
  |      +--+L|      |    `--+--'   `.         /`-----'
  +------+  |A|      |       |        `+------+
            |T|      |    +--+---+     | Peer |
            +-+------+    | IPv6 |     |Device|
                          |Device|     +------+
                          +------+

The dual stack device obviously has an IPv4 and an IPv6 address, and the =
IPv4 side of it speaks through the CLAT. The IPv6 device has no IPv4 =
address. The peer device is the thing the "dual stack" device connects =
to, and might itself be dual stack or IPv4-only. In both cases, however, =
IPv4 access to the peer device will go through the PLAT.

When the IPv6 device wants to talk with the peer device, it will need a =
AAAA record. In the dual stack case, that will contain a "usual" IPv6 =
address, and connectivity will be IPv6 end to end; in the IPv4-only =
case, it will need its IPv4 address embedded into the PLAT's translation =
prefix, which is or is functionally equivalent to DNS64.

When the dual stack device wants to talk with the Peer Device, its IPv4 =
side will need an A record and the CLAT will do the address synthesis. =
Hence, no need for DNS64, and no requirement for it if it exists. The =
IPv6 side will need a AAAA record. If there is a native IPv6 address, =
that's fine, it will use that, and the system might be best served if =
the IPv6 connectivity is used. If there is a DNS64 AAAA record, the IPv4 =
side will use an A record and the CLAT and PLAT, and the IPv6 side will =
use the PLAT and the DNS64 address.

> 3.1.3.  Service Provider offering 464XLAT, without DNS64

The difference from the preceding section will be connectivity between =
an IPv6-only device and an IPv4-only peer. In the previous section, the =
IPv6 device will be unable to communicate with an IPv4-only peer, and =
the dual stack device will use its IPv4 side, the CLAT, and the PLAT.

>    The major advantage of this scenario, using 464XLAT without DNS64, =
is
>    that the service provider ensures that DNSSEC is never broken.

Yes, but at the cost of IPv6-IPv4 connectivity.

> 3.2.  Known to Work Under Special Conditions
>=20
>    The scenarios in this category are known not to work unless

"known to not work"

I'll probably have more comments later, but I'm sending this much now.

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From adegidio@telecentro.net.ar  Wed Jun 27 11:43:40 2018
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Date: Wed, 27 Jun 2018 15:43:33 -0300 (ART)
From: Alejandro D'Egidio <adegidio@telecentro.net.ar>
To: "v6ops@ietf.org list" <v6ops@ietf.org>
Cc: Jordi Palet =?utf-8?Q?Mart=C3=ADnez?= <jordi.palet@theipv6company.com>,  Fred Baker <fredbaker.ietf@gmail.com>
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Jordi, Fred,
  As a network operator I think this is a great work. It give to us the pos=
sibility to have an IPv6 only access network where the need of IPv4 connect=
ivity can be solved thanks to CLAT within the CPE, obviously we need also a=
 NAT64 as PLAT.

  Thanks for this work.


Regards,

ALEJANDRO D'EGIDIO=20
Jefe de Ingenier=C3=ADa de Backbone=20
F: +54 11 3977 1025=C2=A0 | M: +54 911 5794 1589=20
Lavard=C3=A9n 157. Piso 3. CABA (C1437FBC)

----- Mensaje original -----
De: "Fred Baker" <fredbaker.ietf@gmail.com>
Para: "Jordi Palet Mart=C3=ADnez" <jordi.palet@theipv6company.com>, "v6ops@=
ietf.org list" <v6ops@ietf.org>
Enviados: Mi=C3=A9rcoles, 27 de Junio 2018 14:04:34
Asunto: draft-palet-v6ops-nat64-deployment-02 comments

Chair comment: I am interested in making this draft a working group draft. =
I think there is merit in it to do so. However, following our usual process=
, I need agreement from the working group. Consider this a solicitation for=
 that. To do so, I'm looking for comments, supportive or otherwise, especia=
lly from operators. To respond to Barbara's question that she raised with i=
pv4aas, making it a working group document doesn't mean it's done, it means=
 it's a work item as opposed to a suggestion to the working group.

The rest of this is sans hats.

Thanks for your new draft. Let me say that I am increasingly hearing about =
ISPs (cellular and broadband) that, in the words of one, "just don't want t=
o allocate IPv4 addresses anymore", and are taking important steps toward t=
urning IPv4 off within their networks in favor of IPv4 as a service. As you=
 know, this falls into a couple of categories - those that are willing to o=
ffer a client-only IPv4-over-IPv6 or IPv4-cum-IPv6 service, and those that =
need to be able to somehow still put an IPv4 address into an A record (such=
 as a company like Lumix that uses Dynamic DNS Update and firewall hole-pun=
ching to allow a residential user to access their surveillance system from =
an Android/iPhone app) and use it to send a message to the IPv4 server. So =
IMHO, this is an important draft, and it would be useful to get operator co=
mment on it.

I'm reviewing the draft. I'll bring up nits inline, and I may have some oth=
er thoughts as well.

> Abstract
>=20
>    This document describes how NAT64 and 464XLAT can be deployed in an
>    IPv6 operator (cellular and broadband) or enterprise network and the

I suspect that this would read better as "IPv6 network, whether cellular IS=
P, broadband ISP, or enterprise".

> 1.  Introduction

>    To avoid changes in both, the IPv6-only hosts and the IPv4-only
>    server, NAT64 requires also the use of a DNS64 ([RFC6147]), in charge
>    for the synthesis of AAAA records from the A records.

I would disagree that NAT64 "requires" DNS64. NAT64 requires that the desti=
nation IPv6 address contain an embedded IPv4 address. The source of that IP=
v4-embedded IPv6 address is up to the system that sent the packet. A CLAT (=
stateless translation as in RFC 7915) uses address synthesis with a PLAT tr=
anslation prefix. MAP-T adds NAPT44 functionality to that with respect to t=
he outbound IPv4 source address. A random IPv6 host accessing an IPv4-only =
peer might use DNS64, and the AAAA records might simply exist in DNS contai=
ning an IPv4-embedded IPv6 address. But the NAT64 function doesn't use, nor=
 does it require, DNS64.

BTW, SIIT-DC makes rather a point that RFC 6146 is a per-session (effective=
ly NAPT) translator, and provides translation strictly at the IP layer. I s=
uspect that is also a valid configuration, one that needs to be supported. =
In the 464XLAT case, I think it falls out, but I'll have to think about MAP=
-T.

> 3.  NAT64 Deployment Scenarios

>    Consequently, the perspective in this document is to broader those

"broaden"

> 3.1.2.  Service Provider offering 464XLAT, with DNS64

Pictorial image of what I'm picturing:

                          +----+                +----+
                          |DNS |     +-----+    |DNS |
                          |IPv6|     |DNS64|    |IPv4|
                          +--+-+     +--+--+    +--+-+
  +------+ v6 +------+       |          |          |
  |      +----+      |    ,--+--.       |       ,--+--.
  |Dual  |    | IPv6 |   /       \    ,-+-.    /       \
  |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )
  |Device|v4|C|      |   \Network/`.  `---'    \Network/
  |      +--+L|      |    `--+--'   `.         /`-----'
  +------+  |A|      |       |        `+------+
            |T|      |    +--+---+     | Peer |
            +-+------+    | IPv6 |     |Device|
                          |Device|     +------+
                          +------+

The dual stack device obviously has an IPv4 and an IPv6 address, and the IP=
v4 side of it speaks through the CLAT. The IPv6 device has no IPv4 address.=
 The peer device is the thing the "dual stack" device connects to, and migh=
t itself be dual stack or IPv4-only. In both cases, however, IPv4 access to=
 the peer device will go through the PLAT.

When the IPv6 device wants to talk with the peer device, it will need a AAA=
A record. In the dual stack case, that will contain a "usual" IPv6 address,=
 and connectivity will be IPv6 end to end; in the IPv4-only case, it will n=
eed its IPv4 address embedded into the PLAT's translation prefix, which is =
or is functionally equivalent to DNS64.

When the dual stack device wants to talk with the Peer Device, its IPv4 sid=
e will need an A record and the CLAT will do the address synthesis. Hence, =
no need for DNS64, and no requirement for it if it exists. The IPv6 side wi=
ll need a AAAA record. If there is a native IPv6 address, that's fine, it w=
ill use that, and the system might be best served if the IPv6 connectivity =
is used. If there is a DNS64 AAAA record, the IPv4 side will use an A recor=
d and the CLAT and PLAT, and the IPv6 side will use the PLAT and the DNS64 =
address.

> 3.1.3.  Service Provider offering 464XLAT, without DNS64

The difference from the preceding section will be connectivity between an I=
Pv6-only device and an IPv4-only peer. In the previous section, the IPv6 de=
vice will be unable to communicate with an IPv4-only peer, and the dual sta=
ck device will use its IPv4 side, the CLAT, and the PLAT.

>    The major advantage of this scenario, using 464XLAT without DNS64, is
>    that the service provider ensures that DNSSEC is never broken.

Yes, but at the cost of IPv6-IPv4 connectivity.

> 3.2.  Known to Work Under Special Conditions
>=20
>    The scenarios in this category are known not to work unless

"known to not work"

I'll probably have more comments later, but I'm sending this much now.


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Date: Wed, 27 Jun 2018 15:52:53 -0300 (ART)
From: Alejandro D'Egidio <adegidio@telecentro.net.ar>
To: Fred Baker <fredbaker.ietf@gmail.com>
Cc: Jordi Palet =?utf-8?Q?Mart=C3=ADnez?= <jordi.palet@theipv6company.com>,  "v6ops@ietf.org list" <v6ops@ietf.org>
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Thread-Topic: draft-palet-v6ops-nat64-deployment-02 comments
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Subject: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments
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Jordi, Fred,
  As a network operator I think this is a great work. It give to us the pos=
sibility to have an IPv6 only access network where the need of IPv4 connect=
ivity can be solved thanks to CLAT within the CPE, obviously we need also a=
 NAT64 as PLAT.

  Thanks for this work.


Regards,

ALEJANDRO D'EGIDIO=20
Jefe de Ingenier=C3=ADa de Backbone=20
F: +54 11 3977 1025=C2=A0 | M: +54 911 5794 1589=20
Lavard=C3=A9n 157. Piso 3. CABA (C1437FBC)

----- Mensaje original -----
De: "Fred Baker" <fredbaker.ietf@gmail.com>
Para: "Jordi Palet Mart=C3=ADnez" <jordi.palet@theipv6company.com>, "v6ops@=
ietf.org list" <v6ops@ietf.org>
Enviados: Mi=C3=A9rcoles, 27 de Junio 2018 14:04:34
Asunto: draft-palet-v6ops-nat64-deployment-02 comments

Chair comment: I am interested in making this draft a working group draft. =
I think there is merit in it to do so. However, following our usual process=
, I need agreement from the working group. Consider this a solicitation for=
 that. To do so, I'm looking for comments, supportive or otherwise, especia=
lly from operators. To respond to Barbara's question that she raised with i=
pv4aas, making it a working group document doesn't mean it's done, it means=
 it's a work item as opposed to a suggestion to the working group.

The rest of this is sans hats.

Thanks for your new draft. Let me say that I am increasingly hearing about =
ISPs (cellular and broadband) that, in the words of one, "just don't want t=
o allocate IPv4 addresses anymore", and are taking important steps toward t=
urning IPv4 off within their networks in favor of IPv4 as a service. As you=
 know, this falls into a couple of categories - those that are willing to o=
ffer a client-only IPv4-over-IPv6 or IPv4-cum-IPv6 service, and those that =
need to be able to somehow still put an IPv4 address into an A record (such=
 as a company like Lumix that uses Dynamic DNS Update and firewall hole-pun=
ching to allow a residential user to access their surveillance system from =
an Android/iPhone app) and use it to send a message to the IPv4 server. So =
IMHO, this is an important draft, and it would be useful to get operator co=
mment on it.

I'm reviewing the draft. I'll bring up nits inline, and I may have some oth=
er thoughts as well.

> Abstract
>=20
>    This document describes how NAT64 and 464XLAT can be deployed in an
>    IPv6 operator (cellular and broadband) or enterprise network and the

I suspect that this would read better as "IPv6 network, whether cellular IS=
P, broadband ISP, or enterprise".

> 1.  Introduction

>    To avoid changes in both, the IPv6-only hosts and the IPv4-only
>    server, NAT64 requires also the use of a DNS64 ([RFC6147]), in charge
>    for the synthesis of AAAA records from the A records.

I would disagree that NAT64 "requires" DNS64. NAT64 requires that the desti=
nation IPv6 address contain an embedded IPv4 address. The source of that IP=
v4-embedded IPv6 address is up to the system that sent the packet. A CLAT (=
stateless translation as in RFC 7915) uses address synthesis with a PLAT tr=
anslation prefix. MAP-T adds NAPT44 functionality to that with respect to t=
he outbound IPv4 source address. A random IPv6 host accessing an IPv4-only =
peer might use DNS64, and the AAAA records might simply exist in DNS contai=
ning an IPv4-embedded IPv6 address. But the NAT64 function doesn't use, nor=
 does it require, DNS64.

BTW, SIIT-DC makes rather a point that RFC 6146 is a per-session (effective=
ly NAPT) translator, and provides translation strictly at the IP layer. I s=
uspect that is also a valid configuration, one that needs to be supported. =
In the 464XLAT case, I think it falls out, but I'll have to think about MAP=
-T.

> 3.  NAT64 Deployment Scenarios

>    Consequently, the perspective in this document is to broader those

"broaden"

> 3.1.2.  Service Provider offering 464XLAT, with DNS64

Pictorial image of what I'm picturing:

                          +----+                +----+
                          |DNS |     +-----+    |DNS |
                          |IPv6|     |DNS64|    |IPv4|
                          +--+-+     +--+--+    +--+-+
  +------+ v6 +------+       |          |          |
  |      +----+      |    ,--+--.       |       ,--+--.
  |Dual  |    | IPv6 |   /       \    ,-+-.    /       \
  |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )
  |Device|v4|C|      |   \Network/`.  `---'    \Network/
  |      +--+L|      |    `--+--'   `.         /`-----'
  +------+  |A|      |       |        `+------+
            |T|      |    +--+---+     | Peer |
            +-+------+    | IPv6 |     |Device|
                          |Device|     +------+
                          +------+

The dual stack device obviously has an IPv4 and an IPv6 address, and the IP=
v4 side of it speaks through the CLAT. The IPv6 device has no IPv4 address.=
 The peer device is the thing the "dual stack" device connects to, and migh=
t itself be dual stack or IPv4-only. In both cases, however, IPv4 access to=
 the peer device will go through the PLAT.

When the IPv6 device wants to talk with the peer device, it will need a AAA=
A record. In the dual stack case, that will contain a "usual" IPv6 address,=
 and connectivity will be IPv6 end to end; in the IPv4-only case, it will n=
eed its IPv4 address embedded into the PLAT's translation prefix, which is =
or is functionally equivalent to DNS64.

When the dual stack device wants to talk with the Peer Device, its IPv4 sid=
e will need an A record and the CLAT will do the address synthesis. Hence, =
no need for DNS64, and no requirement for it if it exists. The IPv6 side wi=
ll need a AAAA record. If there is a native IPv6 address, that's fine, it w=
ill use that, and the system might be best served if the IPv6 connectivity =
is used. If there is a DNS64 AAAA record, the IPv4 side will use an A recor=
d and the CLAT and PLAT, and the IPv6 side will use the PLAT and the DNS64 =
address.

> 3.1.3.  Service Provider offering 464XLAT, without DNS64

The difference from the preceding section will be connectivity between an I=
Pv6-only device and an IPv4-only peer. In the previous section, the IPv6 de=
vice will be unable to communicate with an IPv4-only peer, and the dual sta=
ck device will use its IPv4 side, the CLAT, and the PLAT.

>    The major advantage of this scenario, using 464XLAT without DNS64, is
>    that the service provider ensures that DNSSEC is never broken.

Yes, but at the cost of IPv6-IPv4 connectivity.

> 3.2.  Known to Work Under Special Conditions
>=20
>    The scenarios in this category are known not to work unless

"known to not work"

I'll probably have more comments later, but I'm sending this much now.


From nobody Wed Jun 27 14:09:12 2018
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Date: Wed, 27 Jun 2018 23:08:36 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Fred Baker <fredbaker.ietf@gmail.com>, "v6ops@ietf.org list" <v6ops@ietf.org>
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Subject: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments
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Hi Fred,



Thanks a lot !



Comments below in-line.





Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de Fred Baker <fredbaker.ietf@=
gmail.com>

Fecha: mi=C3=A9rcoles, 27 de junio de 2018, 19:05

Para: Jordi Palet Mart=C3=ADnez <jordi.palet@theipv6company.com>, "v6ops@ie=
tf.org list" <v6ops@ietf.org>

Asunto: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments



    Chair comment: I am interested in making this draft a working group dra=
ft. I think there is merit in it to do so. However, following our usual pro=
cess, I need agreement from the working group. Consider this a solicitation=
 for that. To do so, I'm looking for comments, supportive or otherwise, esp=
ecially from operators. To respond to Barbara's question that she raised wi=
th ipv4aas, making it a working group document doesn't mean it's done, it m=
eans it's a work item as opposed to a suggestion to the working group.

   =20

    The rest of this is sans hats.

   =20

    Thanks for your new draft. Let me say that I am increasingly hearing ab=
out ISPs (cellular and broadband) that, in the words of one, "just don't wa=
nt to allocate IPv4 addresses anymore", and are taking important steps towa=
rd turning IPv4 off within their networks in favor of IPv4 as a service. As=
 you know, this falls into a couple of categories - those that are willing =
to offer a client-only IPv4-over-IPv6 or IPv4-cum-IPv6 service, and those t=
hat need to be able to somehow still put an IPv4 address into an A record (=
such as a company like Lumix that uses Dynamic DNS Update and firewall hole=
-punching to allow a residential user to access their surveillance system f=
rom an Android/iPhone app) and use it to send a message to the IPv4 server.=
 So IMHO, this is an important draft, and it would be useful to get operato=
r comment on it.





-> Agree and hopefully we can get a lot of contributions ...

   =20

    I'm reviewing the draft. I'll bring up nits inline, and I may have some=
 other thoughts as well.

   =20

    > Abstract

    >=20

    >    This document describes how NAT64 and 464XLAT can be deployed in a=
n

    >    IPv6 operator (cellular and broadband) or enterprise network and t=
he

   =20

    I suspect that this would read better as "IPv6 network, whether cellula=
r ISP, broadband ISP, or enterprise".



-> Perfect, thanks a lot. I'm already doing edits in my draft v03, so I don=
't miss any bit.

   =20

    > 1.  Introduction

   =20

    >    To avoid changes in both, the IPv6-only hosts and the IPv4-only

    >    server, NAT64 requires also the use of a DNS64 ([RFC6147]), in cha=
rge

    >    for the synthesis of AAAA records from the A records.

   =20

    I would disagree that NAT64 "requires" DNS64. NAT64 requires that the d=
estination IPv6 address contain an embedded IPv4 address. The source of tha=
t IPv4-embedded IPv6 address is up to the system that sent the packet. A CL=
AT (stateless translation as in RFC 7915) uses address synthesis with a PLA=
T translation prefix. MAP-T adds NAPT44 functionality to that with respect =
to the outbound IPv4 source address. A random IPv6 host accessing an IPv4-o=
nly peer might use DNS64, and the AAAA records might simply exist in DNS co=
ntaining an IPv4-embedded IPv6 address. But the NAT64 function doesn't use,=
 nor does it require, DNS64.



-> Agree, I took it from an equivalent text in the abstract of DNS64, but i=
t makes sense to put it in reverse:

"DNS64, is in charge of the synthesis of AAAA records from the A records, a=
voiding changes in both, the IPv6-only hosts and the IPv4-only server, so t=
hey can use a NAT64."





   =20

    BTW, SIIT-DC makes rather a point that RFC 6146 is a per-session (effec=
tively NAPT) translator, and provides translation strictly at the IP layer.=
 I suspect that is also a valid configuration, one that needs to be support=
ed. In the 464XLAT case, I think it falls out, but I'll have to think about=
 MAP-T.

   =20

    > 3.  NAT64 Deployment Scenarios

   =20

    >    Consequently, the perspective in this document is to broader those

   =20

    "broaden"

   =20

    > 3.1.2.  Service Provider offering 464XLAT, with DNS64

   =20

    Pictorial image of what I'm picturing:

   =20

                              +----+                +----+

                              |DNS |     +-----+    |DNS |

                              |IPv6|     |DNS64|    |IPv4|

                              +--+-+     +--+--+    +--+-+

      +------+ v6 +------+       |          |          |

      |      +----+      |    ,--+--.       |       ,--+--.

      |Dual  |    | IPv6 |   /       \    ,-+-.    /       \

      |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )

      |Device|v4|C|      |   \Network/`.  `---'    \Network/

      |      +--+L|      |    `--+--'   `.         /`-----'

      +------+  |A|      |       |        `+------+

                |T|      |    +--+---+     | Peer |

                +-+------+    | IPv6 |     |Device|

                              |Device|     +------+

                              +------+

   =20

    The dual stack device obviously has an IPv4 and an IPv6 address, and th=
e IPv4 side of it speaks through the CLAT. The IPv6 device has no IPv4 addr=
ess. The peer device is the thing the "dual stack" device connects to, and =
might itself be dual stack or IPv4-only. In both cases, however, IPv4 acces=
s to the peer device will go through the PLAT.

   =20

    When the IPv6 device wants to talk with the peer device, it will need a=
 AAAA record. In the dual stack case, that will contain a "usual" IPv6 addr=
ess, and connectivity will be IPv6 end to end; in the IPv4-only case, it wi=
ll need its IPv4 address embedded into the PLAT's translation prefix, which=
 is or is functionally equivalent to DNS64.

   =20

    When the dual stack device wants to talk with the Peer Device, its IPv4=
 side will need an A record and the CLAT will do the address synthesis. Hen=
ce, no need for DNS64, and no requirement for it if it exists. The IPv6 sid=
e will need a AAAA record. If there is a native IPv6 address, that's fine, =
it will use that, and the system might be best served if the IPv6 connectiv=
ity is used. If there is a DNS64 AAAA record, the IPv4 side will use an A r=
ecord and the CLAT and PLAT, and the IPv6 side will use the PLAT and the DN=
S64 address.



-> Are you suggesting that I should make a more detailed description in eve=
ry scenario, with more figures, etc. ? Or just in the 464XLAT case ?

   =20

    > 3.1.3.  Service Provider offering 464XLAT, without DNS64

   =20

    The difference from the preceding section will be connectivity between =
an IPv6-only device and an IPv4-only peer. In the previous section, the IPv=
6 device will be unable to communicate with an IPv4-only peer, and the dual=
 stack device will use its IPv4 side, the CLAT, and the PLAT.



-> Right, again, you feel I need to add text to explain that, so same as pr=
evious question, having some extra text only for the 464XLAT cases?

   =20

    >    The major advantage of this scenario, using 464XLAT without DNS64,=
 is

    >    that the service provider ensures that DNSSEC is never broken.

   =20

    Yes, but at the cost of IPv6-IPv4 connectivity.

=20

-> Yes, we are forcing one extra translation at the CE (which is the same a=
s today happens with NAT44). I think if it is a choice of the operator to u=
se DNS64 (and resolve a possible 1.7% - today - DNSSEC incidents), or make =
its life easier by forcing some extra translations that of course, will kee=
p decreasing as more IPv6 deployment happens in services/content providers.=
 If we take in consideration that 60% or so of the services more used (Yout=
ube, Google, Facebook, etc.), area already IPv6 enabled, it means that in a=
n ISP deploying IPv6, the number of "extra" translations at the CLAT will b=
e really insignificant (and don't happen in the operator network, just in t=
he CLAT) compared to the cost of breaking "some" DNSSEC.

  =20

    > 3.2.  Known to Work Under Special Conditions

    >=20

    >    The scenarios in this category are known not to work unless

   =20

    "known to not work"

   =20

    I'll probably have more comments later, but I'm sending this much now.

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




**********************************************
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Are you ready for the new Internet ?
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> On Jun 27, 2018, at 4:08 PM, JORDI PALET MARTINEZ =
<jordi.palet@consulintel.es> wrote:
>> 3.1.2.  Service Provider offering 464XLAT, with DNS64

> -> Are you suggesting that I should make a more detailed description =
in every scenario, with more figures, etc. ? Or just in the 464XLAT case =
?
>=20
>> 3.1.3.  Service Provider offering 464XLAT, without DNS64
>=20
>    The difference from the preceding section will be connectivity =
between an IPv6-only device and an IPv4-only peer. In the previous =
section, the IPv6 device will be unable to communicate with an IPv4-only =
peer, and the dual stack device will use its IPv4 side, the CLAT, and =
the PLAT.
>=20
> -> Right, again, you feel I need to add text to explain that, so same =
as previous question, having some extra text only for the 464XLAT cases?
>=20
>>   The major advantage of this scenario, using 464XLAT without DNS64, =
is
>>   that the service provider ensures that DNSSEC is never broken.
>=20
>    Yes, but at the cost of IPv6-IPv4 connectivity.

I suppose in part I'm thinking out loud. But I do think it's important =
to not trivialize the lack of connectivity in that last case, which I =
think your current text does. Yes, DNSSEC doesn't work (doesn't validate =
a signature, and probably doesn't *have* a signature) with a DNS64 IPv4 =
embedded IPv6 Address. But it doesn't work without one either, because =
in the case nothing works - there is no connectivity. It's a judgement =
call, I suppose, but I think it's better to say it than let the =
installing ISP discover it and wonder what happened.

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    >> 3.1.2.  Service Provider offering 464XLAT, with DNS64

    

    > -> Are you suggesting that I should make a more detailed description in every scenario, with more figures, etc. ? Or just in the 464XLAT case ?

    > 

    >> 3.1.3.  Service Provider offering 464XLAT, without DNS64

    > 

    >    The difference from the preceding section will be connectivity between an IPv6-only device and an IPv4-only peer. In the previous section, the IPv6 device will be unable to communicate with an IPv4-only peer, and the dual stack device will use its IPv4 side, the CLAT, and the PLAT.

    > 

    > -> Right, again, you feel I need to add text to explain that, so same as previous question, having some extra text only for the 464XLAT cases?

    > 

    >>   The major advantage of this scenario, using 464XLAT without DNS64, is

    >>   that the service provider ensures that DNSSEC is never broken.

    > 

    >    Yes, but at the cost of IPv6-IPv4 connectivity.

    

    I suppose in part I'm thinking out loud. But I do think it's important to not trivialize the lack of connectivity in that last case, which I think your current text does. Yes, DNSSEC doesn't work (doesn't validate a signature, and probably doesn't *have* a signature) with a DNS64 IPv4 embedded IPv6 Address. But it doesn't work without one either, because in the case nothing works - there is no connectivity. It's a judgement call, I suppose, but I think it's better to say it than let the installing ISP discover it and wonder what happened.





-> Understood. I will improve the text to avoid that trivialization. However, I don't agree it doesn't works. What happens is that in that case, the connection in that case is done using the IPv4 stack of both peers (so the dual-stack host behind the CLAT CE, only see an "A" record, so naturally use only that one).

    




**********************************************
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Subject: [v6ops] draft-palet-v6ops-nat64-deployment (was DNS64 and DOH) - DNS64 support in draft-ietf-6man-rfc6434-bis
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Hi all,

=20

I just recalled this issue that Erik brought to the DOH list during last me=
eting, which by some reason, I totally forget until just now.

=20

This is related to the last email exchange with Fred as well regarding pros=
/cons of DNS64.

=20

draft-ietf-doh-dns-over-https (v12) has the following on this matter:

=20

3.1.=C2=A0 Non-requirements

=C2=A0=C2=A0 o=C2=A0 Supporting network-specific DNS64 [RFC6147]

=20

and

=20

11.=C2=A0 Operational Considerations

=C2=A0=C2=A0 Local policy considerations and similar factors mean different=
 DNS

=C2=A0=C2=A0 servers may provide different results to the same query: for i=
nstance

=C2=A0=C2=A0 in split DNS configurations [RFC6950].=C2=A0 It logically foll=
ows that the

=C2=A0=C2=A0 server which is queried can influence the end result.=C2=A0 Th=
erefore a

=C2=A0=C2=A0 client's choice of DNS server may affect the responses it gets=
 to its

=C2=A0=C2=A0 queries.=C2=A0 For example, in the case of DNS64 [RFC6147], th=
e choice

=C2=A0=C2=A0 could affect whether IPv6/IPv4 translation will work at all.

=20

So, if DNS64 is being used, it may get broken not just by DoH, but I guess =
also it may be happening in DNS over TLS, DNS over QUIC. I=E2=80=99m going =
to check some of those cases and bring back a new version including some te=
xt, if needed.

=20

Obviously, the best solution will be to ensure that every host has support =
for RFC7050/RFC7227/RFC6147, so they can do the DNS64 by themselves. This w=
ill resolve all the issues of DNS64 I think. I=E2=80=99ve copied Tim on thi=
s, may be is something that we haven=E2=80=99t realized till now, and shoul=
d be considered in (draft-ietf-6man-rfc6434-bis) ? (copied 6man).


Regards,

Jordi

=20

=20

=20

De: <nygren@gmail.com> en nombre de Erik Nygren <erik+ietf@nygren.org>
Fecha: domingo, 18 de marzo de 2018, 20:20
Para: <doh@ietf.org>, Jordi Palet Martinez <jordi.palet@consulintel.es>, Le=
e Howard <lee@asgard.org>
Asunto: DNS64 and DOH

=20

In reading through the dns-over-https draft I'm wondering if we should have=
 some better coverage of DNS64 which is becoming widely deployed in some mo=
bile environments.

(See https://tools.ietf.org/html/draft-palet-v6ops-nat64-deployment-00 for =
some discussions which is on the v6ops agenda for this week.)

Thinking some about this (and general IPv6-only deployments):

* The section mentioning using IP literals as DOH service end-points may wi=
sh to point out the risk that this may have challenges due to mixtures of I=
Pv6-only, dual-stacked, and IPv4-only environments.

* It would be good to add a section on how applications using DOH may wish =
to handle "A" lookups in DNS64 environments.  In particular, to do the DNS6=
4-synthesis and construction in the client when no AAAA record is available=
 and when a NAT64 prefix is available through a mechanism such as:
           RFC 7050 - Discovery of the IPv6 Prefix Used for IPv6 Address Sy=
nthesis,
           RFC 7225 - Discovering NAT64 IPv6 Prefixes Using the Port Contro=
l Protocol (PCP)

 Doing the synthesis in the client seems preferable over trying to get the =
server to do synthesis with the proper prefix in most scenarios, plus in ca=
ses where the client is using the results directly this will get around som=
e of the DNSSEC issues.=20

At least for mobile, not using DNS64 synthesis in the client will likely re=
sult in this either breaking the client in NAT64 environments or causing so=
mething lower in the stack to do the equivalent (a 464xlat CLAT on Android =
or bump-in-the-API on iOS).

=20

        Erik

=20



**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

This electronic message contains information which may be privileged or con=
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idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.


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--></style></head><body lang=3DES link=3Dblue vlink=3Dpurple><div class=3DW=
ordSection1><p class=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-fareast-=
language:EN-US'>Hi all,<o:p></o:p></span></p><p class=3DMsoNormal><span lan=
g=3DES-TRAD style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></=
p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-=
US'>I just recalled this issue that Erik brought to the DOH list during las=
t meeting, which by some reason, I totally forget until just now.<o:p></o:p=
></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-la=
nguage:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=
=3DEN-US style=3D'mso-fareast-language:EN-US'>This is related to the last e=
mail exchange with Fred as well regarding pros/cons of DNS64.<o:p></o:p></s=
pan></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-langua=
ge:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-=
US style=3D'mso-fareast-language:EN-US'>draft-ietf-doh-dns-over-https (v12)=
 has the following on this matter:<o:p></o:p></span></p><p class=3DMsoNorma=
l><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p>=
</span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-lan=
guage:EN-US'>3.1.=C2=A0 Non-requirements<o:p></o:p></span></p><p class=3DMs=
oNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>=C2=A0=C2=
=A0 o=C2=A0 Supporting network-specific DNS64 [RFC6147]<o:p></o:p></span></=
p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-=
US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US sty=
le=3D'mso-fareast-language:EN-US'>and<o:p></o:p></span></p><p class=3DMsoNo=
rmal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o=
:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-=
language:EN-US'>11.=C2=A0 Operational Considerations<o:p></o:p></span></p><=
p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'=
>=C2=A0=C2=A0 Local policy considerations and similar factors mean differen=
t DNS<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D=
'mso-fareast-language:EN-US'>=C2=A0=C2=A0 servers may provide different res=
ults to the same query: for instance<o:p></o:p></span></p><p class=3DMsoNor=
mal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'>=C2=A0=C2=A0 in=
 split DNS configurations [RFC6950].=C2=A0 It logically follows that the<o:=
p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-far=
east-language:EN-US'>=C2=A0=C2=A0 server which is queried can influence the=
 end result.=C2=A0 Therefore a<o:p></o:p></span></p><p class=3DMsoNormal><s=
pan lang=3DEN-US style=3D'mso-fareast-language:EN-US'>=C2=A0=C2=A0 client's=
 choice of DNS server may affect the responses it gets to its<o:p></o:p></s=
pan></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-langua=
ge:EN-US'>=C2=A0=C2=A0 queries.=C2=A0 For example, in the case of DNS64 [RF=
C6147], the choice<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DE=
N-US style=3D'mso-fareast-language:EN-US'>=C2=A0=C2=A0 could affect whether=
 IPv6/IPv4 translation will work at all.<o:p></o:p></span></p><p class=3DMs=
oNormal><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;=
</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-farea=
st-language:EN-US'>So, if DNS64 is being used, it may get broken not just b=
y DoH, but I guess also it may be happening in DNS over TLS, DNS over QUIC.=
 I=E2=80=99m going to check some of those cases and bring back a new versio=
n including some text, if needed.<o:p></o:p></span></p><p class=3DMsoNormal=
><span lang=3DEN-US style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p><=
/span></p><p class=3DMsoNormal><span lang=3DEN-US style=3D'mso-fareast-lang=
uage:EN-US'>Obviously, the best solution will be to ensure that every host =
has support for RFC7050/RFC7227/RFC6147, so they can do the DNS64 by themse=
lves. This will resolve all the issues of DNS64 I think. I=E2=80=99ve copie=
d Tim on this, may be is something that we haven=E2=80=99t realized till no=
w, and should be considered in (draft-ietf-6man-rfc6434-bis) ? (copied 6man=
).<o:p></o:p></span></p><div><p class=3DMsoNormal><span lang=3DEN-US style=
=3D'font-size:10.5pt;color:black'><br>Regards,<o:p></o:p></span></p><p clas=
s=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD style=3D'font-size:10.5pt;c=
olor:black;mso-fareast-language:EN-US'>Jordi<o:p></o:p></span></p><p class=
=3DMsoNormal style=3D'margin-bottom:12.0pt'><span lang=3DES-TRAD style=3D'f=
ont-size:10.5pt;color:black;mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></=
span></p></div><p class=3DMsoNormal><span lang=3DES-TRAD style=3D'mso-farea=
st-language:EN-US'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span l=
ang=3DES-TRAD style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span>=
</p><div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt =
0cm 0cm 0cm'><p class=3DMsoNormal style=3D'margin-left:35.4pt'><b><span sty=
le=3D'font-size:12.0pt;color:black'>De: </span></b><span style=3D'font-size=
:12.0pt;color:black'>&lt;nygren@gmail.com&gt; en nombre de Erik Nygren &lt;=
erik+ietf@nygren.org&gt;<br><b>Fecha: </b>domingo, 18 de marzo de 2018, 20:=
20<br><b>Para: </b>&lt;doh@ietf.org&gt;, Jordi Palet Martinez &lt;jordi.pal=
et@consulintel.es&gt;, Lee Howard &lt;lee@asgard.org&gt;<br><b>Asunto: </b>=
DNS64 and DOH<o:p></o:p></span></p></div><div><p class=3DMsoNormal style=3D=
'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div><div><div><div><p class=3DM=
soNormal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.=
0pt;margin-left:35.4pt'>In reading through the dns-over-https draft I'm won=
dering if we should have some better coverage of DNS64 which is becoming wi=
dely deployed in some mobile environments.<o:p></o:p></p></div><p class=3DM=
soNormal style=3D'mso-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.=
0pt;margin-left:35.4pt'>(See <a href=3D"https://tools.ietf.org/html/draft-p=
alet-v6ops-nat64-deployment-00">https://tools.ietf.org/html/draft-palet-v6o=
ps-nat64-deployment-00</a> for some discussions which is on the v6ops agend=
a for this week.)<o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'ms=
o-margin-top-alt:0cm;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4=
pt'>Thinking some about this (and general IPv6-only deployments):<o:p></o:p=
></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:0cm;margin=
-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt'>* The section mentionin=
g using IP literals as DOH service end-points may wish to point out the ris=
k that this may have challenges due to mixtures of IPv6-only, dual-stacked,=
 and IPv4-only environments.<o:p></o:p></p></div><div><p class=3DMsoNormal =
style=3D'margin-left:35.4pt'>* It would be good to add a section on how app=
lications using DOH may wish to handle &quot;A&quot; lookups in DNS64 envir=
onments.&nbsp; In particular, to do the DNS64-synthesis and construction in=
 the client when no AAAA record is available and when a NAT64 prefix is ava=
ilable through a mechanism such as:<br>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&n=
bsp; RFC 7050 - Discovery of the IPv6 Prefix Used for IPv6 Address Synthesi=
s,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RFC 7225=
 - Discovering NAT64 IPv6 Prefixes Using the Port Control Protocol (PCP)<o:=
p></o:p></p></div><div><p class=3DMsoNormal style=3D'mso-margin-top-alt:0cm=
;margin-right:0cm;margin-bottom:12.0pt;margin-left:35.4pt'>&nbsp;Doing the =
synthesis in the client seems preferable over trying to get the server to d=
o synthesis with the proper prefix in most scenarios, plus in cases where t=
he client is using the results directly this will get around some of the DN=
SSEC issues. <o:p></o:p></p></div><div><p class=3DMsoNormal style=3D'margin=
-left:35.4pt'>At least for mobile, not using DNS64 synthesis in the client =
will likely result in this either breaking the client in NAT64 environments=
 or causing something lower in the stack to do the equivalent (a 464xlat CL=
AT on Android or bump-in-the-API on iOS).<o:p></o:p></p></div><div><p class=
=3DMsoNormal style=3D'margin-left:35.4pt'>&nbsp;<o:p></o:p></p></div><div><=
p class=3DMsoNormal style=3D'margin-left:35.4pt'>&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp; Erik<o:p></o:p></p></div><div><p class=3DMsoNormal style=
=3D'margin-left:35.4pt'><o:p>&nbsp;</o:p></p></div></div></div><br>********=
**************************************<br>
IPv4 is over<br>
Are you ready for the new Internet ?<br>
http://www.consulintel.es<br>
The IPv6 Company<br>
<br>
This electronic message contains information which may be privileged or con=
fidential. The information is intended to be for the exclusive use of the i=
ndividual(s) named above and further non-explicilty authorized disclosure, =
copying, distribution or use of the contents of this information, even if p=
artially, including attached files, is strictly prohibited and will be cons=
idered a criminal offense. If you are not the intended recipient be aware t=
hat any disclosure, copying, distribution or use of the contents of this in=
formation, even if partially, including attached files, is strictly prohibi=
ted, will be considered a criminal offense, so you must reply to the origin=
al sender to inform about this communication and delete it.<br>
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Hi all,



In the last months, following the discussions in 6man and v6ops, regarding =
the prefix size for end-sites and subnets, I decided to work in a revision =
of RFC6177 with the previous co-authors. Lea accepted the challenge (thanks=
 for that!), so we just posted a -bis for RFC6177:



https://datatracker.ietf.org/doc/draft-palet-v6ops-rfc6177-bis/



We will love comments, especially from those that have "heated the debate" =
and will like to heard if we are missing anything to make it clearer.



We believe that this document belongs to v6ops, so probably this is the bes=
t list to comment about.



An objective fact, unless we did the math's wrong, just to start:



   Math's show that even assuming 32 billion of humans (2^35), and

   assigning each of them 4 /48's, with a 50% routing efficiency, we can

   repeat that 2^10 times, so if average life span of each human is 100

   years, and we don't recover back the /48's, we will be able to use

   IPv6 addressing space for over 100.000 years.



Regards,

Jordi



=EF=BB=BF-----Mensaje original-----

De: <internet-drafts@ietf.org>

Fecha: jueves, 28 de junio de 2018, 11:08

Para: Jordi Palet <jordi.palet@theipv6company.com>, Jordi Palet Martinez <j=
ordi.palet@theipv6company.com>, Rosalea G Roberts <lea.roberts@stanford.edu=
>, Rosalea Roberts <lea.roberts@stanford.edu>

Asunto: New Version Notification for draft-palet-v6ops-rfc6177-bis-00.txt



   =20

    A new version of I-D, draft-palet-v6ops-rfc6177-bis-00.txt

    has been successfully submitted by Jordi Palet Martinez and posted to t=
he

    IETF repository.

   =20

    Name:		draft-palet-v6ops-rfc6177-bis

    Revision:	00

    Title:		IPv6 Address Assignment to End-Sites

    Document date:	2018-06-27

    Group:		Individual Submission

    Pages:		10

    URL:            https://www.ietf.org/internet-drafts/draft-palet-v6ops-=
rfc6177-bis-00.txt

    Status:         https://datatracker.ietf.org/doc/draft-palet-v6ops-rfc6=
177-bis/

    Htmlized:       https://tools.ietf.org/html/draft-palet-v6ops-rfc6177-b=
is-00

    Htmlized:       https://datatracker.ietf.org/doc/html/draft-palet-v6ops=
-rfc6177-bis

   =20

   =20

    Abstract:

       The Regional Internet Registries (RIRs) policies, have different

       views regarding the recommendation of the prefix to be assigned to

       end-sites.  However, all them allow up to a /48 without further

       justification and clearly state that the exact choice of how much

       address space should be assigned to end-sites is a decision of each

       operator.  In fact, the operational community has recently developed

       a document with also covers this topic "Best Current Operational

       Practice for Operators: IPv6 prefix assignment for end-users -

       persistent vs non-persistent, and what size to choose".

   =20

       This document reviews the architectural and operational

       considerations of end-site assignments, and reiterates that

       assignment policy and guidelines belong to the RIR community.  This

       revision is being made to emphasize that IPv6 protocol evolution

       requires an ever increasing availability of subnets at the end-site

       and so, policy should reflect that assignment of a single subnet is

       no longer appropriate unless the recipient explicitly agrees to the

       limitations implied by such an assignment.

   =20

       This document obsoletes RFC6177 (IPv6 Address Assignment to End

       Sites).

   =20

                                                                           =
          =20

   =20

   =20

    Please note that it may take a couple of minutes from the time of submi=
ssion

    until the htmlized version and diff are available at tools.ietf.org.

   =20

    The IETF Secretariat

   =20

   =20




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From: Masanobu Kawashima <kawashimam@vx.jp.nec.com>
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Thread-Topic: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments
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Date: Thu, 28 Jun 2018 14:16:13 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Masanobu Kawashima <kawashimam@vx.jp.nec.com>, "v6ops@ietf.org list" <v6ops@ietf.org>
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Subject: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments
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Hi Masanobu,



Thanks for this.



It will be nice if you can circulate the link around NOGs, so we can get mo=
re inputs on it.



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de Masanobu Kawashima <kawashi=
mam@vx.jp.nec.com>

Fecha: jueves, 28 de junio de 2018, 13:58

Para: Jordi Palet Mart=C3=ADnez <jordi.palet@theipv6company.com>, "v6ops@ie=
tf.org list" <v6ops@ietf.org>

Asunto: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments



   =20

    Hi Jordi,=20

   =20

    I've read all of this draft. This is a great work and nice guideline.=
=20

   =20

    I'm not a network operator, but as one of CE router vendors,=20

    I'll recommend operators to read this document even if it is still indi=
vidual draft.=20

    This document will help them for their decision, especially if they con=
sider=20

    NAT64/464XLAT.=20

   =20

    Anyway, I support this document as a working group document.=20

    I may input some information when I get comments from them.=20

   =20

    Regards,=20

    Masanobu=20

   =20

    =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=20

     NEC Platforms, Ltd.                =20

     KAWASHIMA Masanobu                 =20

     kawashimam@vx.jp.nec.com           =20

     https://www.necplatforms.co.jp/en/ =20

    =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=20

   =20

   =20

    > -----Original Message-----

    > From: v6ops <v6ops-bounces@ietf.org> On Behalf Of Fred Baker

    > Sent: Thursday, June 28, 2018 2:05 AM

    > To: Jordi Palet Mart=C3=ADnez <jordi.palet@theipv6company.com>; v6ops=
@ietf.org list <v6ops@ietf.org>

    > Subject: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments

    >=20

    > Chair comment: I am interested in making this draft a working group d=
raft. I think there is merit in it to do so.

    > However, following our usual process, I need agreement from the worki=
ng group. Consider this a solicitation for that.

    > To do so, I'm looking for comments, supportive or otherwise, especial=
ly from operators. To respond to Barbara's question

    > that she raised with ipv4aas, making it a working group document does=
n't mean it's done, it means it's a work item

    > as opposed to a suggestion to the working group.

    >=20

    > The rest of this is sans hats.

    >=20

    > Thanks for your new draft. Let me say that I am increasingly hearing =
about ISPs (cellular and broadband) that, in

    > the words of one, "just don't want to allocate IPv4 addresses anymore=
", and are taking important steps toward turning

    > IPv4 off within their networks in favor of IPv4 as a service. As you =
know, this falls into a couple of categories

    > - those that are willing to offer a client-only IPv4-over-IPv6 or IPv=
4-cum-IPv6 service, and those that need to be

    > able to somehow still put an IPv4 address into an A record (such as a=
 company like Lumix that uses Dynamic DNS Update

    > and firewall hole-punching to allow a residential user to access thei=
r surveillance system from an Android/iPhone

    > app) and use it to send a message to the IPv4 server. So IMHO, this i=
s an important draft, and it would be useful

    > to get operator comment on it.

    >=20

    > I'm reviewing the draft. I'll bring up nits inline, and I may have so=
me other thoughts as well.

    >=20

    > > Abstract

    > >

    > >    This document describes how NAT64 and 464XLAT can be deployed in=
 an

    > >    IPv6 operator (cellular and broadband) or enterprise network and=
 the

    >=20

    > I suspect that this would read better as "IPv6 network, whether cellu=
lar ISP, broadband ISP, or enterprise".

    >=20

    > > 1.  Introduction

    >=20

    > >    To avoid changes in both, the IPv6-only hosts and the IPv4-only

    > >    server, NAT64 requires also the use of a DNS64 ([RFC6147]), in c=
harge

    > >    for the synthesis of AAAA records from the A records.

    >=20

    > I would disagree that NAT64 "requires" DNS64. NAT64 requires that the=
 destination IPv6 address contain an embedded

    > IPv4 address. The source of that IPv4-embedded IPv6 address is up to =
the system that sent the packet. A CLAT (stateless

    > translation as in RFC 7915) uses address synthesis with a PLAT transl=
ation prefix. MAP-T adds NAPT44 functionality

    > to that with respect to the outbound IPv4 source address. A random IP=
v6 host accessing an IPv4-only peer might use

    > DNS64, and the AAAA records might simply exist in DNS containing an I=
Pv4-embedded IPv6 address. But the NAT64 function

    > doesn't use, nor does it require, DNS64.

    >=20

    > BTW, SIIT-DC makes rather a point that RFC 6146 is a per-session (eff=
ectively NAPT) translator, and provides translation

    > strictly at the IP layer. I suspect that is also a valid configuratio=
n, one that needs to be supported. In the 464XLAT

    > case, I think it falls out, but I'll have to think about MAP-T.

    >=20

    > > 3.  NAT64 Deployment Scenarios

    >=20

    > >    Consequently, the perspective in this document is to broader tho=
se

    >=20

    > "broaden"

    >=20

    > > 3.1.2.  Service Provider offering 464XLAT, with DNS64

    >=20

    > Pictorial image of what I'm picturing:

    >=20

    >                           +----+                +----+

    >                           |DNS |     +-----+    |DNS |

    >                           |IPv6|     |DNS64|    |IPv4|

    >                           +--+-+     +--+--+    +--+-+

    >   +------+ v6 +------+       |          |          |

    >   |      +----+      |    ,--+--.       |       ,--+--.

    >   |Dual  |    | IPv6 |   /       \    ,-+-.    /       \

    >   |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )

    >   |Device|v4|C|      |   \Network/`.  `---'    \Network/

    >   |      +--+L|      |    `--+--'   `.         /`-----'

    >   +------+  |A|      |       |        `+------+

    >             |T|      |    +--+---+     | Peer |

    >             +-+------+    | IPv6 |     |Device|

    >                           |Device|     +------+

    >                           +------+

    >=20

    > The dual stack device obviously has an IPv4 and an IPv6 address, and =
the IPv4 side of it speaks through the CLAT.

    > The IPv6 device has no IPv4 address. The peer device is the thing the=
 "dual stack" device connects to, and might itself

    > be dual stack or IPv4-only. In both cases, however, IPv4 access to th=
e peer device will go through the PLAT.

    >=20

    > When the IPv6 device wants to talk with the peer device, it will need=
 a AAAA record. In the dual stack case, that

    > will contain a "usual" IPv6 address, and connectivity will be IPv6 en=
d to end; in the IPv4-only case, it will need

    > its IPv4 address embedded into the PLAT's translation prefix, which i=
s or is functionally equivalent to DNS64.

    >=20

    > When the dual stack device wants to talk with the Peer Device, its IP=
v4 side will need an A record and the CLAT will

    > do the address synthesis. Hence, no need for DNS64, and no requiremen=
t for it if it exists. The IPv6 side will need

    > a AAAA record. If there is a native IPv6 address, that's fine, it wil=
l use that, and the system might be best served

    > if the IPv6 connectivity is used. If there is a DNS64 AAAA record, th=
e IPv4 side will use an A record and the CLAT

    > and PLAT, and the IPv6 side will use the PLAT and the DNS64 address.

    >=20

    > > 3.1.3.  Service Provider offering 464XLAT, without DNS64

    >=20

    > The difference from the preceding section will be connectivity betwee=
n an IPv6-only device and an IPv4-only peer.

    > In the previous section, the IPv6 device will be unable to communicat=
e with an IPv4-only peer, and the dual stack

    > device will use its IPv4 side, the CLAT, and the PLAT.

    >=20

    > >    The major advantage of this scenario, using 464XLAT without DNS6=
4, is

    > >    that the service provider ensures that DNSSEC is never broken.

    >=20

    > Yes, but at the cost of IPv6-IPv4 connectivity.

    >=20

    > > 3.2.  Known to Work Under Special Conditions

    > >

    > >    The scenarios in this category are known not to work unless

    >=20

    > "known to not work"

    >=20

    > I'll probably have more comments later, but I'm sending this much now=
.

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




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On Jun 28, 2018, at 1:14 AM, JORDI PALET MARTINEZ =
<jordi.palet@consulintel.es> wrote:
>>>>  The major advantage of this scenario, using 464XLAT without DNS64, =
is
>>>>  that the service provider ensures that DNSSEC is never broken.
>>>=20
>>>   Yes, but at the cost of IPv6-IPv4 connectivity.
>>=20
>>    I suppose in part I'm thinking out loud. But I do think it's =
important to not trivialize the lack of connectivity in that last case, =
which I think your current text does. Yes, DNSSEC doesn't work (doesn't =
validate a signature, and probably doesn't *have* a signature) with a =
DNS64 IPv4 embedded IPv6 Address. But it doesn't work without one =
either, because in the case nothing works - there is no connectivity. =
It's a judgement call, I suppose, but I think it's better to say it than =
let the installing ISP discover it and wonder what happened.
>=20
> -> Understood. I will improve the text to avoid that trivialization. =
However, I don't agree it doesn't works. What happens is that in that =
case, the connection in that case is done using the IPv4 stack of both =
peers (so the dual-stack host behind the CLAT CE, only see an "A" =
record, so naturally use only that one).

For the dual stack host behind the CLAT, yes. For the IPv6-only host, =
there is either no connectivity to an IPv4-only host, or it goes through =
the PLAT and DNSSEC is broken. There remains no connectivity using the =
signed DNSSEC A record, because the IPv6-only host isn't using it.

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From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Fred Baker <fredbaker.ietf@gmail.com>
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Subject: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments
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Do you think it makes sense today for a smart OS or app provider, knowing t=
hat that app need to talk to IPv4-only hosts, to make that app or OS, IPv6-=
only?



If I'm on their feet, will only make the app or OS IPv6-only once I'm 100% =
sure that what the peer I need to speak, is also IPv6-ready.



And by the way, this will only make sense when that OS or app provider know=
s for sure that their customers will get also IPv6 from their ISPs.



Or I'm missing something?



So what I'm saying is that supporting IPv6-only hosts is not making sense f=
or now, and even if that is supported, that the ISP offers DNS64, all will =
get broken if the user changes the DNS servers ...



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: Fred Baker <fredbaker.ietf@gmail.com>

Fecha: jueves, 28 de junio de 2018, 14:24

Para: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>

CC: "v6ops@ietf.org list" <v6ops@ietf.org>

Asunto: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments



   =20

   =20

    On Jun 28, 2018, at 1:14 AM, JORDI PALET MARTINEZ <jordi.palet@consulin=
tel.es> wrote:

    >>>>  The major advantage of this scenario, using 464XLAT without DNS64=
, is

    >>>>  that the service provider ensures that DNSSEC is never broken.

    >>>=20

    >>>   Yes, but at the cost of IPv6-IPv4 connectivity.

    >>=20

    >>    I suppose in part I'm thinking out loud. But I do think it's impo=
rtant to not trivialize the lack of connectivity in that last case, which I=
 think your current text does. Yes, DNSSEC doesn't work (doesn't validate a=
 signature, and probably doesn't *have* a signature) with a DNS64 IPv4 embe=
dded IPv6 Address. But it doesn't work without one either, because in the c=
ase nothing works - there is no connectivity. It's a judgement call, I supp=
ose, but I think it's better to say it than let the installing ISP discover=
 it and wonder what happened.

    >=20

    > -> Understood. I will improve the text to avoid that trivialization. =
However, I don't agree it doesn't works. What happens is that in that case,=
 the connection in that case is done using the IPv4 stack of both peers (so=
 the dual-stack host behind the CLAT CE, only see an "A" record, so natural=
ly use only that one).

   =20

    For the dual stack host behind the CLAT, yes. For the IPv6-only host, t=
here is either no connectivity to an IPv4-only host, or it goes through the=
 PLAT and DNSSEC is broken. There remains no connectivity using the signed =
DNSSEC A record, because the IPv6-only host isn't using it.

   =20




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On Jun 28, 2018, at 7:30 AM, JORDI PALET MARTINEZ =
<jordi.palet@consulintel.es> wrote:
> Do you think it makes sense today for a smart OS or app provider, =
knowing that that app need to talk to IPv4-only hosts, to make that app =
or OS, IPv6-only?

I'm not making a market statement. I'm looking at a technical scenario, =
which I laid out in email yesterday. It could be IPv6-only because the =
network didn't give it an IPv4 address, to pick one possible reason out =
of a cloud of possible ones. The point is, it *is*, and if the peer it =
wants to talk with doesn't have a AAAA record, whether native or DNS64, =
it can't.

So the failure of DNSSEC when DNS64 is used isn't the only issue. =
Connectivity is also an issue. That's my whole point.

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From henri.godoy@fca.unicamp.br  Thu Jun 28 09:54:42 2018
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Date: Thu, 28 Jun 2018 13:54:33 -0300
From: Henri Alves de Godoy <henri.godoy@fca.unicamp.br>
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Subject: [v6ops] NAT64/464XLAT Deployment Guidelines
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Hi v6ops list members.

My name is Henri and I am a network administrator at the University of 
Campinas, UNICAMP / Brazil.

We no longer have ipv4 to deliver to the end users of a wireless 
network. Our wireless traffic overtook the wired network. We are 
researching and doing some testing with NAT64 / DNS64 for delivery of 
ipv6-only to the academic community.

I believe that the discussion of this draft is important and could help 
us to implement NAT64 in the university, as well as to better understand 
the scenario and the problems that will come.

Thanks

Att,

-- 
Henri Alves Godoy
Tecnologia da Informação e Comunicação
Faculdade de Ciências Aplicadas - FCA
Universidade Estadual de Campinas - UNICAMP
Fone: +55 (19) 3701-6682


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Dear Fred and Jordi,

As an academic researcher, I think this draft makes sense and I support 
its adoption.

I have one minor comment regarding the figure below:

>> 3.1.2.  Service Provider offering 464XLAT, with DNS64
> Pictorial image of what I'm picturing:
>
>                            +----+                +----+
>                            |DNS |     +-----+    |DNS |
>                            |IPv6|     |DNS64|    |IPv4|
>                            +--+-+     +--+--+    +--+-+
>    +------+ v6 +------+       |          |          |
>    |      +----+      |    ,--+--.       |       ,--+--.
>    |Dual  |    | IPv6 |   /       \    ,-+-.    /       \
>    |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )
>    |Device|v4|C|      |   \Network/`.  `---'    \Network/
>    |      +--+L|      |    `--+--'   `.         /`-----'
>    +------+  |A|      |       |        `+------+
>              |T|      |    +--+---+     | Peer |
>              +-+------+    | IPv6 |     |Device|
>                            |Device|     +------+
>                            +------+

Connecting the DNS64 server to the PLAT device suggests me as if DNS64 
were a kind of subfunction of PLAT. Of course it is not the case. They 
can be implemented by two independent devices: stateful NAT64 is usually 
implemented by a router and DNS64 is usually implemented by a DNS server.

I have been thinking about an alternative drawing like this:

                           +----+                +----+
                           |DNS |     +-----+    |DNS |
                           |IPv6|     |DNS64|    |IPv4|
                           +--+-+     +-----+    +--+-+
   +------+ v6 +------+       |      /       \      |
   |      +----+      |    ,--+--.  /         \  ,--+--.
   |Dual  |    | IPv6 |   /       \/   ,---.   \/       \
   |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )
   |Device|v4|C|      |   \Network/`.  `---'    \Network/
   |      +--+L|      |    `--+--'   `.         /`-----'
   +------+  |A|      |       |        `+------+
             |T|      |    +--+---+     | Peer |
             +-+------+    | IPv6 |     |Device|
                           |Device|     +------+
                           +------+


What do you think of it?

Best regards,

Gabor



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Date: Thu, 28 Jun 2018 22:58:51 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Lencse =?UTF-8?B?R8OhYm9y?= <lencse@hit.bme.hu>, <v6ops@ietf.org>
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Thanks Gabor!



I think the location of the DNS64 is not relevant, unless I'm missing somet=
hing ... In fact, the "easier and most common" scenario is that the DNS its=
elf (Bind, etc.), is also running the DNS64 function.



We could have 10 different pictures for it, the point is to clarify impacts=
 of having it vs not, so to provide a decision point to an operator/enterpr=
ise willing to deploy it.



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de Lencse G=C3=A1bor <lencse@h=
it.bme.hu>

Fecha: jueves, 28 de junio de 2018, 21:48

Para: <v6ops@ietf.org>

Asunto: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments



    Dear Fred and Jordi,

   =20

    As an academic researcher, I think this draft makes sense and I support=
=20

    its adoption.

   =20

    I have one minor comment regarding the figure below:

   =20

    >> 3.1.2.  Service Provider offering 464XLAT, with DNS64

    > Pictorial image of what I'm picturing:

    >

    >                            +----+                +----+

    >                            |DNS |     +-----+    |DNS |

    >                            |IPv6|     |DNS64|    |IPv4|

    >                            +--+-+     +--+--+    +--+-+

    >    +------+ v6 +------+       |          |          |

    >    |      +----+      |    ,--+--.       |       ,--+--.

    >    |Dual  |    | IPv6 |   /       \    ,-+-.    /       \

    >    |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )

    >    |Device|v4|C|      |   \Network/`.  `---'    \Network/

    >    |      +--+L|      |    `--+--'   `.         /`-----'

    >    +------+  |A|      |       |        `+------+

    >              |T|      |    +--+---+     | Peer |

    >              +-+------+    | IPv6 |     |Device|

    >                            |Device|     +------+

    >                            +------+

   =20

    Connecting the DNS64 server to the PLAT device suggests me as if DNS64=
=20

    were a kind of subfunction of PLAT. Of course it is not the case. They=
=20

    can be implemented by two independent devices: stateful NAT64 is usuall=
y=20

    implemented by a router and DNS64 is usually implemented by a DNS serve=
r.

   =20

    I have been thinking about an alternative drawing like this:

   =20

                               +----+                +----+

                               |DNS |     +-----+    |DNS |

                               |IPv6|     |DNS64|    |IPv4|

                               +--+-+     +-----+    +--+-+

       +------+ v6 +------+       |      /       \      |

       |      +----+      |    ,--+--.  /         \  ,--+--.

       |Dual  |    | IPv6 |   /       \/   ,---.   \/       \

       |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )

       |Device|v4|C|      |   \Network/`.  `---'    \Network/

       |      +--+L|      |    `--+--'   `.         /`-----'

       +------+  |A|      |       |        `+------+

                 |T|      |    +--+---+     | Peer |

                 +-+------+    | IPv6 |     |Device|

                               |Device|     +------+

                               +------+

   =20

   =20

    What do you think of it?

   =20

    Best regards,

   =20

    Gabor

   =20

   =20

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




**********************************************
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Are you ready for the new Internet ?
http://www.consulintel.es
The IPv6 Company

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Subject: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments
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6/28/2018 10:58 PM keltezéssel, JORDI PALET MARTINEZ írta:
> Thanks Gabor!
>
>
>
> I think the location of the DNS64 is not relevant, unless I'm missing something ...

Yes, I agree. The location of DNS64 by itself is not my concern. What I 
would like to emphasize is that DNS64 does not belong to NAT64. The 
reason, why I am aware of this is my experience with DNS64 and NAT64 
benchmarking.

In all other research papers than ours, they measured the performance of 
a given NAT64 implementation together with a given DNS64 implementation, 
which is a significant flaw. We have pointed out that their performances 
should be measured independently. And our approach was followed by RFC 
8219, too.

> In fact, the "easier and most common" scenario is that the DNS itself (Bind, etc.), is also running the DNS64 function.

You mentioned BIND, which is natural, as BIND is still considered the de 
facto industry standard DNS server.

However, when talking about DNS64, BIND is the worst solution. According 
to our benchmarking results, ISP-s should choose either Unbound or 
PowerDNS as DNS64 server, but not BIND. Let me support my statement with 
measurement results:


	PowerDNS 	Unbound 	BIND
1-core DNS64 performance (queries per second) 	3077 	8708 	2425
16-core DNS64 performance (queries per second) 	26620 	17131 	6661


The measurements complied with RFC 8219. For the details, please refer to:

G. Lencse and Y. Kadobayashi, "Benchmarking DNS64 Implementations: 
Theory and Practice", /Computer Communications/ (Elsevier), vol. 127, 
no. 1, pp. 61-74, September 1, 2018, DOI: 10.1016/j.comcom.2018.05.005

I think it would be worth mentioning these results in the draft, as they 
give useful guidelines for the DNS64 server implementation selection.

Best regards,

Gábor

>
>
> We could have 10 different pictures for it, the point is to clarify impacts of having it vs not, so to provide a decision point to an operator/enterprise willing to deploy it.
>
>
>
> Regards,
>
> Jordi
>
>   
>
>   
>
>
>
> ﻿-----Mensaje original-----
>
> De: v6ops <v6ops-bounces@ietf.org> en nombre de Lencse Gábor <lencse@hit.bme.hu>
>
> Fecha: jueves, 28 de junio de 2018, 21:48
>
> Para: <v6ops@ietf.org>
>
> Asunto: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments
>
>
>
>      Dear Fred and Jordi,
>
>      
>
>      As an academic researcher, I think this draft makes sense and I support
>
>      its adoption.
>
>      
>
>      I have one minor comment regarding the figure below:
>
>      
>
>      >> 3.1.2.  Service Provider offering 464XLAT, with DNS64
>
>      > Pictorial image of what I'm picturing:
>
>      >
>
>      >                            +----+                +----+
>
>      >                            |DNS |     +-----+    |DNS |
>
>      >                            |IPv6|     |DNS64|    |IPv4|
>
>      >                            +--+-+     +--+--+    +--+-+
>
>      >    +------+ v6 +------+       |          |          |
>
>      >    |      +----+      |    ,--+--.       |       ,--+--.
>
>      >    |Dual  |    | IPv6 |   /       \    ,-+-.    /       \
>
>      >    |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )
>
>      >    |Device|v4|C|      |   \Network/`.  `---'    \Network/
>
>      >    |      +--+L|      |    `--+--'   `.         /`-----'
>
>      >    +------+  |A|      |       |        `+------+
>
>      >              |T|      |    +--+---+     | Peer |
>
>      >              +-+------+    | IPv6 |     |Device|
>
>      >                            |Device|     +------+
>
>      >                            +------+
>
>      
>
>      Connecting the DNS64 server to the PLAT device suggests me as if DNS64
>
>      were a kind of subfunction of PLAT. Of course it is not the case. They
>
>      can be implemented by two independent devices: stateful NAT64 is usually
>
>      implemented by a router and DNS64 is usually implemented by a DNS server.
>
>      
>
>      I have been thinking about an alternative drawing like this:
>
>      
>
>                                 +----+                +----+
>
>                                 |DNS |     +-----+    |DNS |
>
>                                 |IPv6|     |DNS64|    |IPv4|
>
>                                 +--+-+     +-----+    +--+-+
>
>         +------+ v6 +------+       |      /       \      |
>
>         |      +----+      |    ,--+--.  /         \  ,--+--.
>
>         |Dual  |    | IPv6 |   /       \/   ,---.   \/       \
>
>         |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )
>
>         |Device|v4|C|      |   \Network/`.  `---'    \Network/
>
>         |      +--+L|      |    `--+--'   `.         /`-----'
>
>         +------+  |A|      |       |        `+------+
>
>                   |T|      |    +--+---+     | Peer |
>
>                   +-+------+    | IPv6 |     |Device|
>
>                                 |Device|     +------+
>
>                                 +------+
>
>      
>
>      
>
>      What do you think of it?
>
>      
>
>      Best regards,
>
>      
>
>      Gabor
>
>      
>
>      
>
>      _______________________________________________
>
>      v6ops mailing list
>
>      v6ops@ietf.org
>
>      https://www.ietf.org/mailman/listinfo/v6ops
>
>      
>
>
>
>
> **********************************************
> IPv4 is over
> Are you ready for the new Internet ?
> http://www.consulintel.es
> The IPv6 Company
>
> This electronic message contains information which may be privileged or confidential. The information is intended to be for the exclusive use of the individual(s) named above and further non-explicilty authorized disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited and will be considered a criminal offense. If you are not the intended recipient be aware that any disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited, will be considered a criminal offense, so you must reply to the original sender to inform about this communication and delete it.
>
>
>


--------------A6BF76E28BC9D01E08D977F2
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: 8bit

<html>
  <head>
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000000">
    <br>
    <br>
    <div class="moz-cite-prefix">6/28/2018 10:58 PM keltezéssel, JORDI
      PALET MARTINEZ írta:<br>
    </div>
    <blockquote
      cite="mid:427C7EE4-7B07-4094-9315-01E03A5120B3@consulintel.es"
      type="cite">
      <pre wrap="">Thanks Gabor!



I think the location of the DNS64 is not relevant, unless I'm missing something ... </pre>
    </blockquote>
    <br>
    Yes, I agree. The location of DNS64 by itself is not my concern.
    What I would like to emphasize is that DNS64 does not belong to
    NAT64. The reason, why I am aware of this is my experience with
    DNS64 and NAT64 benchmarking. <br>
    <br>
    In all other research papers than ours, they measured the
    performance of a given NAT64 implementation together with a given
    DNS64 implementation, which is a significant flaw. We have pointed
    out that their performances should be measured independently. And
    our approach was followed by RFC 8219, too.<br>
     <br>
    <blockquote
      cite="mid:427C7EE4-7B07-4094-9315-01E03A5120B3@consulintel.es"
      type="cite">
      <pre wrap="">In fact, the "easier and most common" scenario is that the DNS itself (Bind, etc.), is also running the DNS64 function.
</pre>
    </blockquote>
    <br>
    You mentioned BIND, which is natural, as BIND is still considered
    the de facto industry standard DNS server. <br>
    <br>
    However, when talking about DNS64, BIND is the worst solution.
    According to our benchmarking results, ISP-s should choose either
    Unbound or PowerDNS as DNS64 server, but not BIND. Let me support my
    statement with measurement results:<br>
    <br>
    <table style="border-collapse: collapse;width:441pt" border="0"
      cellpadding="0" cellspacing="0" width="588">
      <colgroup><col
          style="mso-width-source:userset;mso-width-alt:12851;width:289pt"
          width="386"> <col
          style="mso-width-source:userset;mso-width-alt:2611;width:59pt"
          width="78"> <col
          style="mso-width-source:userset;mso-width-alt:2304;width:52pt"
          width="69"> <col
          style="mso-width-source:userset;mso-width-alt:1843;width:41pt"
          width="55"> </colgroup><tbody>
        <tr style="height:14.4pt" height="19">
          <td style="height:14.4pt;width:289pt" height="19" width="386"><br>
          </td>
          <td class="xl65" style="width:59pt" align="center" width="78">PowerDNS</td>
          <td class="xl65" style="width:52pt" align="center" width="69">Unbound</td>
          <td class="xl66" style="width:41pt" align="center" width="55">BIND</td>
        </tr>
        <tr style="height:14.4pt" height="19">
          <td style="height:14.4pt" height="19">1-core DNS64 performance
            (queries per second)</td>
          <td class="xl67" align="right">3077</td>
          <td class="xl67" align="right">8708</td>
          <td class="xl67" align="right">2425</td>
        </tr>
        <tr style="height:14.4pt" height="19">
          <td style="height:14.4pt" height="19">16-core DNS64
            performance (queries per second)</td>
          <td class="xl67" align="right">26620</td>
          <td class="xl67" align="right">17131</td>
          <td class="xl67" align="right">6661</td>
        </tr>
      </tbody>
    </table>
              <br>
    The measurements complied with RFC 8219. For the details, please
    refer to:<br>
    <br>
    G. Lencse and Y. Kadobayashi, "Benchmarking DNS64 Implementations:
    Theory and Practice", <i>Computer Communications</i> (Elsevier),
    vol. 127, no. 1, pp. 61-74, September 1, 2018, DOI:
    10.1016/j.comcom.2018.05.005<br>
    <br>
    I think it would be worth mentioning these results in the draft, as
    they give useful guidelines for the DNS64 server implementation
    selection.<br>
    <br>
    Best regards,<br>
    <br>
    Gábor<br>
    <br>
    <blockquote
      cite="mid:427C7EE4-7B07-4094-9315-01E03A5120B3@consulintel.es"
      type="cite">
      <pre wrap="">


We could have 10 different pictures for it, the point is to clarify impacts of having it vs not, so to provide a decision point to an operator/enterprise willing to deploy it.



Regards,

Jordi

 

 



﻿-----Mensaje original-----

De: v6ops <a class="moz-txt-link-rfc2396E" href="mailto:v6ops-bounces@ietf.org">&lt;v6ops-bounces@ietf.org&gt;</a> en nombre de Lencse Gábor <a class="moz-txt-link-rfc2396E" href="mailto:lencse@hit.bme.hu">&lt;lencse@hit.bme.hu&gt;</a>

Fecha: jueves, 28 de junio de 2018, 21:48

Para: <a class="moz-txt-link-rfc2396E" href="mailto:v6ops@ietf.org">&lt;v6ops@ietf.org&gt;</a>

Asunto: Re: [v6ops] draft-palet-v6ops-nat64-deployment-02 comments



    Dear Fred and Jordi,

    

    As an academic researcher, I think this draft makes sense and I support 

    its adoption.

    

    I have one minor comment regarding the figure below:

    

    &gt;&gt; 3.1.2.  Service Provider offering 464XLAT, with DNS64

    &gt; Pictorial image of what I'm picturing:

    &gt;

    &gt;                            +----+                +----+

    &gt;                            |DNS |     +-----+    |DNS |

    &gt;                            |IPv6|     |DNS64|    |IPv4|

    &gt;                            +--+-+     +--+--+    +--+-+

    &gt;    +------+ v6 +------+       |          |          |

    &gt;    |      +----+      |    ,--+--.       |       ,--+--.

    &gt;    |Dual  |    | IPv6 |   /       \    ,-+-.    /       \

    &gt;    |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )

    &gt;    |Device|v4|C|      |   \Network/`.  `---'    \Network/

    &gt;    |      +--+L|      |    `--+--'   `.         /`-----'

    &gt;    +------+  |A|      |       |        `+------+

    &gt;              |T|      |    +--+---+     | Peer |

    &gt;              +-+------+    | IPv6 |     |Device|

    &gt;                            |Device|     +------+

    &gt;                            +------+

    

    Connecting the DNS64 server to the PLAT device suggests me as if DNS64 

    were a kind of subfunction of PLAT. Of course it is not the case. They 

    can be implemented by two independent devices: stateful NAT64 is usually 

    implemented by a router and DNS64 is usually implemented by a DNS server.

    

    I have been thinking about an alternative drawing like this:

    

                               +----+                +----+

                               |DNS |     +-----+    |DNS |

                               |IPv6|     |DNS64|    |IPv4|

                               +--+-+     +-----+    +--+-+

       +------+ v6 +------+       |      /       \      |

       |      +----+      |    ,--+--.  /         \  ,--+--.

       |Dual  |    | IPv6 |   /       \/   ,---.   \/       \

       |Stack |  +-+Router+--(  IPv6   )--( PLAT)--(  IPv4   )

       |Device|v4|C|      |   \Network/`.  `---'    \Network/

       |      +--+L|      |    `--+--'   `.         /`-----'

       +------+  |A|      |       |        `+------+

                 |T|      |    +--+---+     | Peer |

                 +-+------+    | IPv6 |     |Device|

                               |Device|     +------+

                               +------+

    

    

    What do you think of it?

    

    Best regards,

    

    Gabor

    

    

    _______________________________________________

    v6ops mailing list

    <a class="moz-txt-link-abbreviated" href="mailto:v6ops@ietf.org">v6ops@ietf.org</a>

    <a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/v6ops">https://www.ietf.org/mailman/listinfo/v6ops</a>

    




**********************************************
IPv4 is over
Are you ready for the new Internet ?
<a class="moz-txt-link-freetext" href="http://www.consulintel.es">http://www.consulintel.es</a>
The IPv6 Company

This electronic message contains information which may be privileged or confidential. The information is intended to be for the exclusive use of the individual(s) named above and further non-explicilty authorized disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited and will be considered a criminal offense. If you are not the intended recipient be aware that any disclosure, copying, distribution or use of the contents of this information, even if partially, including attached files, is strictly prohibited, will be considered a criminal offense, so you must reply to the original sender to inform about this communication and delete it.



</pre>
    </blockquote>
    <br>
  </body>
</html>

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From: Richard Patterson <richard@helix.net.nz>
Date: Fri, 29 Jun 2018 17:22:15 +0100
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To: "v6ops@ietf.org list" <v6ops@ietf.org>, intarea-chairs@ietf.org, dhcwg@ietf.org
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Subject: [v6ops] New Version Notification for draft-patterson-intarea-ipoe-health-03.txt
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Version -03 of =EF=BB=BFdraft-patterson-intarea-ipoe-health has now been up=
loaded.
Thanks to Med, Jean-Yves and Dusan for their review and comments.

The noteworthy changes since -02 include:
 - Added DHCP option flag to force ARP/ND for health checks.
 - Populated IANA Considerations.
 - Added Retry Interval distinct timer for between failed checks.
 - Added default parameter values.

-Richard


On 29/06/2018, 17:14, "internet-drafts@ietf.org"
<internet-drafts@ietf.org> wrote:


    A new version of I-D, draft-patterson-intarea-ipoe-health-03.txt
    has been successfully submitted by Richard Patterson and posted to the
    IETF repository.

    Name:           draft-patterson-intarea-ipoe-health
    Revision:       03
    Title:          IP over Ethernet (IPoE) Session Health Checking
    Document date:  2018-06-29
    Group:          Individual Submission
    Pages:          15
    URL:
https://www.ietf.org/internet-drafts/draft-patterson-intarea-ipoe-health-03=
.txt
    Status:
https://datatracker.ietf.org/doc/draft-patterson-intarea-ipoe-health/
    Htmlized:
https://tools.ietf.org/html/draft-patterson-intarea-ipoe-health-03
    Htmlized:
https://datatracker.ietf.org/doc/html/draft-patterson-intarea-ipoe-health
    Diff:
https://www.ietf.org/rfcdiff?url2=3Ddraft-patterson-intarea-ipoe-health-03

    Abstract:
       PPP over Ethernet clients have the functionality to detect path
       unavailability by using PPP Keepalives.  IP over Ethernet does not
       have this functionality, and it is not specified in the IETF when an
       IP over Ethernet client should consider its WAN connectivity down,
       unless there is a physical layer link down event.

       This document describes a mechanism for IP over Ethernet clients to
       achieve connectivity validation, similar to that of PPP over
       Ethernet, by using BFD Echo, or ARP and Neighbor Discovery functions=
.




    Please note that it may take a couple of minutes from the time of submi=
ssion
    until the htmlized version and diff are available at tools.ietf.org.

    The IETF Secretariat


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From: Fred Baker <fredbaker.ietf@gmail.com>
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The draft cutoff for IETF 102 is Monday =
(https://datatracker.ietf.org/meeting/important-dates/). If you have =
something to add, now would be the time to do it.

I note that we have had three drafts posted in the past week. We have =
had some supportive discussion of draft-palet-v6ops-nat64-deployment, =
and I am adding it the the agenda for IETF 102. We also have (and I am =
soliciting feedback on) draft-palet-v6ops-rfc6177-bis, which is a =
partial rewrite of RFC 6177, and draft-jaeggli-v6ops-indefensible-nd, =
which is a new draft. Per our procedures, I need the working group to =
tell us whether they want these on the agenda.

https://tools.ietf.org/html/draft-palet-v6ops-rfc6177-bis
https://tools.ietf.org/html/draft-palet-v6ops-nat64-deployment
https://tools.ietf.org/html/draft-jaeggli-v6ops-indefensible-nd

Note that there may be other new drafts by Monday at UTC 23:59. I'll =
mention them Tuesday if I see them.

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Subject: [v6ops] Time to dump dual-stack networks and get on the IPv6 train - with LW4o6
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> Time to dump dual-stack networks and get on the IPv6 train - with LW4o6 ht=
tps://news360.com/article/460267064


IPv6 Jon the press. Thinking about this as we approach IETF 102, where IPv4 o=
verlaid on or translated to IPv6 is on the agenda.

Sent from my iPad=


From nobody Sat Jun 30 00:47:56 2018
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Date: Sat, 30 Jun 2018 09:47:48 +0200
From: JORDI PALET MARTINEZ <jordi.palet@consulintel.es>
To: Fred Baker <fredbaker.ietf@gmail.com>, <v6ops@ietf.org>
Message-ID: <1CB1AE09-17BB-4205-9793-05988877BA65@consulintel.es>
Thread-Topic: [v6ops] Time to dump dual-stack networks and get on the IPv6 train - with LW4o6
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/RxbS8hO4h5zR8kuUaBGGvBJnSTA>
Subject: Re: [v6ops] Time to dump dual-stack networks and get on the IPv6 train - with LW4o6
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Interesting, they took it from the APNIG and RIPE blogs which this week pub=
lished an article on that ...



Regards,

Jordi

=20

=20



=EF=BB=BF-----Mensaje original-----

De: v6ops <v6ops-bounces@ietf.org> en nombre de Fred Baker <fredbaker.ietf@=
gmail.com>

Fecha: s=C3=A1bado, 30 de junio de 2018, 9:17

Para: <v6ops@ietf.org>

Asunto: [v6ops] Time to dump dual-stack networks and get on the IPv6 train =
- with LW4o6



    > Time to dump dual-stack networks and get on the IPv6 train - with LW4=
o6 https://news360.com/article/460267064

   =20

   =20

    IPv6 Jon the press. Thinking about this as we approach IETF 102, where =
IPv4 overlaid on or translated to IPv6 is on the agenda.

   =20

    Sent from my iPad

    _______________________________________________

    v6ops mailing list

    v6ops@ietf.org

    https://www.ietf.org/mailman/listinfo/v6ops

   =20




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From: Carlos Cebrian <ccebrian@walhallacloud.com>
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ASaan Cloud Service Provider we really believe NAT64/464XLAT guidelines are=
 important and may be relevant for our networks.


[cid:image010.jpg@01D1B2A0.35E9EED0]
Carlos Cebri=E1n
R&D Dept. Director
* Office:  +34 96 393 99 00

ccebrian@walhallacloud.com<mailto:ccebrian@walhalladcs.com>;   www.walhalla=
cloud.com<http://www.walhalladcs.com/>
Walhalla Datacenter: when Data is Critical

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</span></i><i><span lang=3D"EN-US" style=3D"font-size:9.0pt;font-family:&qu=
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color:#18376A">96
 393 99 00</span><span lang=3D"EN-US" style=3D"color:black"><o:p></o:p></sp=
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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Subject: Re: [v6ops] Time to dump dual-stack networks and get on the IPv6 train - with LW4o6
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On 30/06/2018 19:16, Fred Baker wrote:
>> Time to dump dual-stack networks and get on the IPv6 train - with LW4o6 https://news360.com/article/460267064
> 
> 
> IPv6 Jon the press. Thinking about this as we approach IETF 102, where IPv4 overlaid on or translated to IPv6 is on the agenda.

It's a typical journalistic headline that over-simplifies something that's
rather more subtle. There's no need to "dump" dual stack in situations where
it's the best solution, and there's nothing wrong with coexistence for the
next 20 years in situations where it's the simplest option. Also, of course,
hosts that use IPv4-as-a-service over an IPv6-only link *are* dual stack
hosts.

But then, that's The Register for you.

    Brian

