[arin-ppml] IPv4 SWIP requirements (?)

Hostmaster at uneedus.com Hostmaster at uneedus.com
Fri May 26 00:02:34 EDT 2017

This proposal was intended to try to bring the v4 and v6 world together on 
the same policy.  Because of the nibble boundary rule and rDNS, on the v6 
side, there are really only 5 choices in network size: /48, /52, /56, /60 
and /64 without having to do non-standard CNAME tricks used when 
subdividing the rDNS for more than one customer in a /24 of v4.

V6 Stated another way: /64 is one network, /60 is 16 networks, and /56 is 
256 networks.  Since most sane networks want to separate their IOT, Guest 
and Subscriber devices network from one another, this means that /60 is as 
small as is reasonable to go, and still maintain parity with the /32 of v4 
space used by residential and small business clients and the current and 
future technology in the v4 world. Some comments clearly state that 
operators should not be giving out anything less than a /60, which seems 
to state v6 /60 is the same as v4 /32.

The focus of the proposal to me is v6 parity or better.  Since current 
policy seems to have no issue with a blanket policy of a /48 for every 
site, there should be no issue with a /56 or /60 as far as wastefulness of 
address space, a more conserving choice.

Since 16 seemed like a magic number, I thought the perfect line would be 
more than 16 networks for v6 or 16 addresses for v4 without knowing the 
community wants to keep 8 address or more assignment registration for v4. 
I now realize that there is no case to change this just to acheve absolute 
parity, and I see nothing wrong with giving v6 a slight advantage.

We do need to do something about the current IPv6 policy that requires ALL 
IPv6 assignments be registered, even those customers with the smallest 
possible size network of /64.

I suggest "More than a /56" is best for, and we remove the v4 
proposal, since there appears to be strong agreement to leave 
the current level of assignment registration for v4.  While argument can 
be made that /60 is enough, the next step up is reasonable at more than 

What I would like to hear from the community is their input as to where to 
draw the line for  While I proposed both /60 and /64 be exempt 
from registration, other comments suggest that /56 should as well.

Currently a /64 or more (which is ALL IPv6 networks) must be SWIP'ed.
Our choices is to leave this requirement alone or:

1) Change to More than a /64, which has the disadvantage of prohibiting 
any subnetting.

2) Change to More than a /60, which is the current proposal, which will 
allow up to 16 subnets for IOT/VLAN/other future uses.

3) Change to More than a /56 which will allow 256 networks, and a bit more 
future proofing, but not so much to be unreasonable.

Albert Erdmann
Network Administrator
Paradise On Line Inc.

On Thu, 25 May 2017, Ronald F. Guilmette wrote:

> In message <8f79ce56-9a9a-18a8-94df-d29c21563648 at rollernet.us>,
> Seth Mattinen <sethm at rollernet.us> wrote:
>> On 5/25/17 11:38, Ronald F. Guilmette wrote:
>>> If true, this comes as a big shock and surprise to me, and I'd appreciate
>>> someone giving me the exact citation for this rule, so that I can properly
>>> cite it to others.
>> NRPM section
> Thank you for the refernece.  I've just now perused it, and it is most
> enlightening.
> May I safely assume that when, on a nearly daily basis, I encounter
> unambiguous violations of the above cited ARIN NRPM section, that I
> should immediately bring all such violations to the attention of
> The Internet Police?
> Reading over NRPM, I am also left just slightly unclear on a
> couple of small but important points that relate directly to situations
> that I seem to come upon with great frequency in my daily research.
> Specifically, where may I find a formal definition for the term
> "Residential Customer"?  Given that every legal entity, human or
> otherwise, "resides" somewhere, even if only within the 4x4 inch
> confines of a rented P.O. box, it would seem arguable that every
> legal entity on the planet could, depending on one's definition,
> qualify as a "Residential Customer".  (And on a related note, I
> cannot help by wonder aloud if there is any limit to the size of
> allocations made to "Residential Customers".  May a "Residential
> Customer" be assigned an IPv4 /16?)
> Second... and I don't think that I'm the first to ask about this...
> may an ARIN member that has received a direct allocation satisfy
> the edicts of NRPM by creating SWIPs or Rwhois records which
> make reference to non-person legal entities which demonstratably no
> longer exist, in a legal sense?
> Again, I thank everyone for your indulgence while I try to understand
> this very interesting policy (NRPM
> Regards,
> rfg
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