nanog mailing list archives

Re: Vint Cerf Re: Backward Compatibility Re: IPv4 address block


From: Warren Kumari <warren () kumari net>
Date: Sat, 13 Jan 2024 16:50:20 -0800

On Sat, Jan 13, 2024 at 9:48 AM, Tom Beecher <beecher () beecher cc> wrote:

Vint told you the same thing other people have been telling you for years.
You don't seem to name drop anyone else. Weird.



Indeed — Vint made an observation, but this was not intended to be
endorsement…

Implying that it is is disingenuous…

W


Respectfully, you have no credibility in this area. I happened to notice
this gem re-reading your draft last night,

A.1.1. T1a Initiates a Session Request towards T4a

   T1a sends a session request to SPR4 that serves T4a by a plain IP
   packet with header as in Figure 5, to RG1. There is no TCP port
   number in this IP header yet.


That's a curious statement there at the end. Let's continue though.

A.1.2. RG1 Forwards the Packet to SPR1

     RG1, allowing be masqueraded by T1a, relays the packet toward SPR1
   by assigning the TCP Source port number, 3N, to T1a, with a header as
   in Figure 6,. Note that the suffix "N" denotes the actual TCP port
   number assigned by the RG1's RG-NAT. This could assume multiple
   values, each represents a separate communications session that T1a is
   engaged in. A corresponding entry is created in the RG1 state table
   for handling the reply packet from the Destination site. Since T4a's
   TCP port number is not known yet, it is filled with all 1's.

        0                   1                   2                   3
        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     1 |Version|IHL (6)|Type of Service|       Total Length (24)       |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     2 |        Identification         |Flags|     Fragment Offset     |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     3 | Time to Live  |    Protocol   |        Header Checksum        |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     4 |              Source Host Number (240.0.0.0)                   |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     5 |           Destination Host Number (69.41.190.148)             |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     6 |       Source Port (3N)        |   Destination Port (All 1's)  |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                 Figure 6  TCP/IP Header: From RG1 to SPR1


Wait a second.. what is a 'TCP/IP header'?

A.1.5. T4a Replies to SPR4

   T4a interchanges the Source and Destination identifications in the
   incoming TCP/IP packet to create a header as in Figure 9, for the
   reply packet to SPR4.

        0                   1                   2                   3
        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     1 |Version|IHL (6)|Type of Service|       Total Length (24)       |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     2 |        Identification         |Flags|     Fragment Offset     |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     3 | Time to Live  |    Protocol   |        Header Checksum        |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     4 |              Source Host Number (240.0.0.10)                  |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     5 |           Destination Host Number (69.41.190.110)             |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     6 |      Source Port (10C)        |     Destination Port (0C)     |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                 Figure 9  TCP/IP Header: From T4a to SPR4


Oh my.. you actually meant it.

The draft authors don't appear to understand that TCP headers and IP
headers **are not the same thing**.

I would suggest reviewing RFC 791 ( IPv4 ) , and RFC 793 / 9293 ( TCP,
original and updated ).



On Sat, Jan 13, 2024 at 7:35 AM Abraham Y. Chen <aychen () avinta com> wrote:


Hi, Tom:

1)        " ...  Implying that Vint Cerf ever said anything about EzIP
... ":

    FYI - Please see the below copy of a partial eMail thread. Bold, red
colored and Italicized letters are to focus on the topic.

***********


InternetPolicy () eList ISOC org  eMail thread


 On 2021-10-18 16:34, Abraham Y. Chen wrote:


Dear Vint:


 Yes, this is one perspective for visualizing the EzIP proposal.

Thanks,

 Abe (2021-10-18 16:33 EDT)


 Re: [Internet Policy] 202110180800.AYC Re: Platform self-regulation


 On 2021-10-18 10:39, *vinton cerf* wrote:


sounds like *eZIP* is basically an *overlay* network.


 *v*


 On Mon, Oct 18, 2021 at 8:33 AM Abraham Y. Chen via InternetPolicy <
internetpolicy () elists isoc org> wrote:


Hi, Scott:


 0)    Thanks for your research.


 1)    Both SCION (based on my best understanding) and our work named
EzIP (phonetic for Easy IPv4) are technical solutions for improving the
Internet from its foundation level (the architecture). There are many
implications with such schemes including social and legal if one looks into
them.


 2)    As I responded to Gene's questions (See my eMail with subject line
tag: "202110171756.AYC"), the SCION approach implements certain
restrictions ......

************

2)    Prior to the above, we were quite unsure about what our team was
doing. So, I purposely avoided having any contact with Vint. We had been
describing the EzIP's RANs (Regional Area Networks) as "kites floating in
the air over an geographic area anchored by an IPv4 address based cord".
Although visually clear, it was too wordy. By using one concise word,
*overlay*, Vint eloquently classified the EzIP network in terminology
sense. It opened our eyes about what were the implications of EzIP and what
could be the interactions with respect to the existing Internet, because
EzIP was a non-interfering enhancement to an existing system which was a
text book case of systems engineering.

Hope the above clears the air.


Regards,


Abe (2024-01-13 07:34)


On 2024-01-12 19:24, Tom Beecher wrote:


I go into my cave to finish the todo list for the week, and I come out to
see Mr. Chen :
- Telling Randy Bush he should "read some history" on IPv6
- Implying that Vint Cerf ever said anything about EzIP

Fairly impressive sequence of self ownage.

On Fri, Jan 12, 2024 at 5:46 PM Randy Bush <randy () psg com> wrote:




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