RE: Let's Focus on Moving Forward Re: V6 still not supported re: 202203261833.AYC

[Nicholas Warren <nwarren () barryelectric com>]

The vocabulary is distracting...

In practice this extends IPv4 addresses by 32 bits, making them 64 bits in total. They are referring to the top 32 bits 
(240.0.0.0/6) as a “shaft.” The bottom 32 bits make up the "realm."

Here is the way my teeny tiny brain understands it:
1. We get our shafts from ARIN. I get 240.0.0.1; you get 240.0.0.2.
2. We announce our shiny new shafts in BGP. Yes, we announce the /32 that is our shaft.
3. We setup our networks to use the bottom 32 bits however we see fit in our network. (for the example, I assign my 
client 1.2.3.4 and you assign your client 4.3.2.1)
4. Somehow, we get DNS to hand out 64 bit addresses, probably through a AAAA and just ignoring the last 64 bits.
5. My client, assigned the address 1.2.3.4 in my realm, queries your client's address "shaft:240.0.0.2; realm 4.3.2.1" 
from DNS.
6. My client then sends your client a packet (IPv4 source: 240.0.0.1; IPv4 destination: 240.0.0.2; Next Header: 4 
(IPv4); IPv4 source: 1.2.3.4; IPv4 destination: 4.3.2.1)
7. 240.0.0.0/6 is routable on plain old normal internet routers, so nothing needs to be changed. (lol)
8a. Your router receives the packet, and your router does special things with its shaft. (IPv4 source: 240.0.0.1; IPv4 
destination: _4.3.2.1_; Next Header: 4 (IPv4); IPv4 source: 1.2.3.4; IPv4 destination: _240.0.0.2_)
8b. Alternatively, every router in your network could determine next hop by investigating the second header when the 
destination is your shaft.
9. Your client receives the packet and can either handle this case in a special way or translate it to a v6 address for 
higher level applications.

No, as a matter of fact, I don't know I'm talking about. Hopefully one of the authors can correct my walkthrough of how 
it works 😊

Shaft and realm are fun words. I see why they picked them.

- Nich

From: NANOG <nanog-bounces+nwarren=barryelectric.com () nanog org> On Behalf Of Vasilenko Eduard via NANOG
Sent: Monday, April 4, 2022 3:28 AM
To: Abraham Y. Chen <aychen () avinta com>; Pascal Thubert (pthubert) <pthubert () cisco com>; Justin Streiner 
<streinerj () gmail com>
Cc: NANOG <nanog () nanog org>
Subject: RE: Let's Focus on Moving Forward Re: V6 still not supported re: 202203261833.AYC

2)    When you extend each floor to use the whole IPv4 address pool, however, you are essential talking about covering 
the entire surface of the earth. Then, there is no isolated buildings with isolated floors to deploy your model 
anymore. There is only one spherical layer of physical earth surface for you to use as a realm, which is the current 
IPv4 deployment. How could you still have multiple full IPv4 address sets deployed, yet not seeing their identical 
twins, triplets, etc.? Are you proposing multiple spherical layers of "realms", one on top of the other?

It is the same as what I was trying to explain to Pascal. How to map the 2-level hierarchy of the draft 
(“Shaft”:”Realm”) to the real world?
I am sure that it is possible to do this if assume that the real world has 2 levels of hierarchy where the high level 
is “BGP AS”.
“BGP AS” is the name that everybody understands, No need for a new name “Shaft”.

Ed/
From: Abraham Y. Chen [mailto:aychen () avinta com] 
Sent: Saturday, April 2, 2022 12:45 AM
To: Pascal Thubert (pthubert) <mailto:pthubert () cisco com>; Vasilenko Eduard <mailto:vasilenko.eduard () huawei com>; 
Justin Streiner <mailto:streinerj () gmail com>
Cc: NANOG <mailto:nanog () nanog org>
Subject: Re: Let's Focus on Moving Forward Re: V6 still not supported re: 202203261833.AYC

Hi, Pascal:

1)    " ...  for the next version. ...    ":    I am not sure that I can wait for so long, because I am asking for the 
basics. The reason that I asked for an IP packet header example of your proposal is to visualize what do you mean by 
the model of "realms and shafts in a multi-level building". The presentation in the draft  sounds okay, because the 
floors are physically isolated from one another. And, even the building is isolated from other buildings. This is 
pretty much how PBX numbering plan worked. 

2)    When you extend each floor to use the whole IPv4 address pool, however, you are essential talking about covering 
the entire surface of the earth. Then, there is no isolated buildings with isolated floors to deploy your model 
anymore. There is only one spherical layer of physical earth surface for you to use as a realm, which is the current 
IPv4 deployment. How could you still have multiple full IPv4 address sets deployed, yet not seeing their identical 
twins, triplets, etc.? Are you proposing multiple spherical layers of "realms", one on top of the other?

2)    When I cited the DotConnectAfrica graphic logo as a visual model for the EzIP deployment over current IPv4, I was 
pretty specific that each RAN was tethered from the current Internet core via one IPv4 address. We were very careful 
about isolating the netblocks in terms of which one does what. In other words, even though the collection of RANs form 
a parallel cyberspace to the Internet, you may look at each RAN as an isolated balloon for others. So that each RAN can 
use up the entire 240/4 netblock. 

Please clarify your configuration.

Thanks,


Abe (2022-04-01 17:44)  




On 2022-04-01 10:55, Abraham Y. Chen wrote:
On 2022-04-01 10:00, Pascal Thubert (pthubert) wrote:
Makes sense, Abe, for the next version.
 
Note that the intention is NOT any to ANY. A native IPv6 IoT device can only talk to another IPv6 device, where that 
other device may use a YATT address or any other IPv6 address.
But it cannot talk to a YADA node. That’s what I mean by baby steps for those who want to.
 
Keep safe;
 
Pascal
 
From: Abraham Y. Chen mailto:aychen () avinta com 
Sent: vendredi 1 avril 2022 15:49
To: Vasilenko Eduard mailto:vasilenko.eduard () huawei com; Pascal Thubert (pthubert) mailto:pthubert () cisco com; 
Justin Streiner mailto:streinerj () gmail com
Cc: NANOG mailto:nanog () nanog org
Subject: Re: Let's Focus on Moving Forward Re: V6 still not supported re: 202203261833.AYC
 
Hi, Pascal:
 
What I would appreciate is an IP packet header design/definition layout, word-by-word, ideally in bit-map style, of an 
explicit presentation of all IP addresses involved from one IoT in one realm to that in the second realm. This will 
provide a clearer picture of how the real world implementation may look like.
 
Thanks,
 
 
Abe (2022-04-01 09:48)
 
 
On 2022-04-01 08:49, Vasilenko Eduard wrote:
As I understand: “IPv4 Realms” between “Shaft” should be capable to have a plain IPv4 header (or else why all of these).
Then Gateway in the Shaft should change headers (from IPv4 to IPv6).
Who should implement this gateway and why? He should be formally appointed to such an exercise, right?
Map this 2 level hierarchy to the real world – you may fail with this.
Ed/
From: Pascal Thubert (pthubert) [mailto:pthubert () cisco com] 
Sent: Friday, April 1, 2022 3:41 PM
To: Vasilenko Eduard mailto:vasilenko.eduard () huawei com; Justin Streiner mailto:streinerj () gmail com; Abraham Y. 
Chen mailto:aychen () avinta com
Subject: RE: Let's Focus on Moving Forward Re: V6 still not supported re: 202203261833.AYC
 
Hello Eduard:
 
Did you just demonstrate that POPs cannot exist? Or that there cannot be a Default Free Zone?
I agree with your real world issue that some things will have to be planned between stake holders, and that it will not 
be easy. 
But you know what the French say about “impossible”.
Or to paraphrase Sir Arthur, now that we have eliminated all the impossible transition scenarios, whatever remains…
 
There will be YADA prefixes just like there are root DNS. To be managed by different players as you point out. And all 
routable within the same shaft.
 
Keep safe;
 
Pascal
 
From: Vasilenko Eduard <mailto:vasilenko.eduard () huawei com> 
Sent: vendredi 1 avril 2022 14:32
To: Pascal Thubert (pthubert) <mailto:pthubert () cisco com>; Justin Streiner <mailto:streinerj () gmail com>; Abraham 
Y. Chen <mailto:aychen () avinta com>
Subject: RE: Let's Focus on Moving Forward Re: V6 still not supported re: 202203261833.AYC
 
Hi Pascal,
In general, your idea to create a hierarchy is good.
In practice, it would fail because you have created a virtual hierarchy that does not map to any administrative border. 
Who should implement gateways for the “Shaft”? Why?
If you would appoint Carrier as the Shaft responsible then it is not enough bits for Shaft.
If you would appoint Governments as the Shaft responsible then would be a so big scandal that you would regret the 
proposal.
Hence, I do not see proper mapping for the hierarchy to make YADA successful.
Eduard
From: NANOG [mailto:nanog-bounces+vasilenko.eduard=huawei.com () nanog org] On Behalf Of Pascal Thubert (pthubert) via 
NANOG
Sent: Friday, April 1, 2022 2:26 PM
To: Justin Streiner <mailto:streinerj () gmail com>; Abraham Y. Chen <mailto:aychen () avinta com>
Cc: NANOG <mailto:nanog () nanog org>
Subject: RE: Let's Focus on Moving Forward Re: V6 still not supported re: 202203261833.AYC
 
For the sake of it, Justin, I just published https://datatracker.ietf.org/doc/draft-thubert-v6ops-yada-yatt/.
The first section of the draft (YADA) extends IPv4 range in an IPv4-only world. For some people that might be enough 
and I’m totally fine with that.
 
Keep safe;
 
Pascal
 
From: NANOG <mailto:nanog-bounces+pthubert=cisco.com () nanog org> On Behalf Of Justin Streiner
Sent: dimanche 27 mars 2022 18:12
To: Abraham Y. Chen <mailto:aychen () avinta com>
Cc: NANOG <mailto:nanog () nanog org>
Subject: Re: Let's Focus on Moving Forward Re: V6 still not supported re: 202203261833.AYC
 
Abe:
 
To your first point about denying that anyone is being stopped from working on IPv4, I'm referring to users being able 
to communicate via IPv4.  I have seen no evidence of that.
 
I'm not familiar with the process of submitting ideas to IETF, so I'll leave that for others who are more knowledgeable 
on that to speak up if they're so inclined.
 
Thank you
jms
 
On Sat, Mar 26, 2022 at 6:43 PM Abraham Y. Chen <mailto:aychen () avinta com> wrote:
 
1)    "... no one is stopping anyone from working on IPv4 ...     ":   After all these discussions, are you still 
denying this basic issue? For example, there has not been any straightforward way to introduce IPv4 enhancement ideas 
to IETF since at least 2015. If you know the way, please make it public. I am sure that many are eager to learn about 
it. Thanks.
 
 

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