[arin-ppml] Draft Policy ARIN-2019-10: Inter-RIR M&A - Seeking Community Comments

Fernando Frediani fhfrediani at gmail.com
Mon Jul 15 23:37:36 EDT 2019


Thanks Albert for such a comprehensive explanation and for going over 
something that certainly most people understand well so didactically and 
covering that "objection" completely.

I support that this fracturing of the reverse DNS is something 
unnecessary and at the cost of not having to renumber. The correct path 
in my view is the company request space in another RIR where it is 
moving to and renumber with time and plan. Keep it Simpler.

Fernando

On 16/07/2019 00:17, hostmaster at uneedus.com wrote:
> I will take a stab at what this means.
>
> I am choosing the block containing my IPv6 addresses as an example. If 
> you go to the ARIN whois site and look up network NET6-2600, you will 
> see that this network range is 2600::  to 
> 260f:ffff:ffff:ffff:ffff:ffff:ffff:ffff. This network is otherwise 
> stated as 2600::/12., and shows that it is assigned to ARIN by IANA.  
> IANA always assigns blocks of IPv6 addresses to RIR's in /12 blocks.
>
> A link to this is https://whois.arin.net/rest/net/NET6-2600-1
>
> This means the ENTIRE BLOCK has been assigned to ARIN, and therefore 
> ARIN controls the reverse DNS of this entire block.
>
> ARIN allocates portions of this block to LIR's or ISP's and provides a 
> pointer to the DNS servers designated by the entities that have been 
> allocated the IPv6 blocks contained within the larger /12 block.
>
> If RIR transfers were permitted, ARIN would have to give control of 
> the transfered addresses within this block to the RIR(s) involved and 
> would no longer control the entire block. PKI also follows from top to 
> bottom and may not work properly if portions of the block are assigned 
> to different RIR(s).
>
> More generically, I would call this "ARIN giving up control of 
> portions of the Reverse DNS zones to another RIR."  It breaks the 
> block apart, thus the poster's term "fracturing".
>
> I believe that ARIN should maintain control of 100% of each IPv6 block 
> that it receives from IANA.  I can understand the term "fracturing" 
> being used to describe what would happen to IPv6 blocks received from 
> IANA, if ARIN gave up control of specific addresses contained within 
> that block to another RIR.  If someone wants to receive IPv6 addresses 
> from another RIR, I believe that they need to renumber into a block 
> belonging to that RIR.
>
> Generally ARIN (and other RIR's) use what is called "sparse 
> allocation" when allocating IPv6 blocks.  This means that addresses 
> before and after each allocation are left vacant, so that a specific 
> allocation can be made larger without having to allocate more than one 
> block of addresses, controlling the growth of the routing tables.  
> Instead, the existing block is made larger.  For example a /35 might 
> be expanded to a /32, and this was done when the policy was changed to 
> allocate ISP's a /32 by default, and this way the addresses continue 
> to remain in a single block of a larger size.
>
> Albert Erdmann
> Network Administrator
> Paradise On Line Inc.
>
>
>
> On Tue, 16 Jul 2019, Job Snijders wrote:
>
>> Dear Fernando,
>>
>> On Mon, Jul 15, 2019 at 08:13:12PM -0300, Fernando Frediani wrote:
>>> I will comment only in one of the points, the other I believe are
>>> really well explained by others and it doesn't seem good to 'rain on
>>> the wet floor'.
>>
>> I'm sorry but I don't think we can skip over some of these "objections"
>> without further substantiation on what the terminology actually means.
>>
>> The term "fracturing the Reverse DNS zone" was coined just a few hours
>> ago and I don't think most people have any idea what it means. At least
>> I don't! :-)
>>
>> I googled the term "fractured DNS", and from what I understand it is a
>> term used in context of alternative DNS roots (DNS roots other than
>> the ICANN/IANA root most of us use). I fail to see what "fractured DNS"
>> might mean in our current context of inter-RIR IPv6 transfers.
>>
>> Kind regards,
>>
>> Job
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