[arin-ppml] Draft Policy ARIN-2017-5: Equalization of Assignment Registration requirements between IPv4 and IPv6

Owen DeLong owen at delong.com
Tue Jul 11 20:32:34 EDT 2017

> On May 30, 2017, at 06:41 , William Herrin <bill at herrin.us> wrote:
> On Tue, May 30, 2017 at 9:12 AM, Roberts, Orin <oroberts at bell.ca <mailto:oroberts at bell.ca>> wrote:
> Hello all,
> I am avidly following this discussion and based on my daily observances (daily swips /subnets ), I would say Andy is closest to being practical.
> Leave the IPv4 /29 requirements alone, THIS LIMIT IS ALREADY BEING PUSHED AT DAILY BY NON-RESIDENTIAL USERS and only the vague ARIN policy prevents total chaos.
> With regards to IPv6, I would recommend ANY USER/ENTITY/ORG that requests a /56 OR LARGER NETWORK assignment be swiped.
> That would still leave /60 to /64 assignments as minimum assignment or for dynamic usage for either residential or other usage.
> Howdy,
> I don't like putting the SWIP requirement at /56 or larger because I think that would encourage ISPs to assign /60s instead of /56s. The IPv6 experts I've read seem to have a pretty strong consensus that the minimum assignment to an end user should be either /48 or /56. Setting ARIN policy that encourages assignments smaller than -both- of these numbers would be a bad idea IMHO.

This is one of those rare occasions when I absolutely agree with Bill. If we’re going to do this, I would support a requirement as follows:

	1.	For customers fitting the definition in NRPM 2.13, /47 or shorter.
	2.	For customers not fitting the definition in NRPM 2.13 /63 or shorter.

> Again I remind everyone that a /64 assignment to an end user, even for dynamic or residential use, is absolutely positively 100% wrong. Doing so prevents the end user from configuring their local lans as IPv6 is designed. They need at least a /60 for that. If you are assigning /64's to end users, you are doing it wrong.

Yes… The only place I can imagine assigning /64s to customers as a legitimate practice is for single-LAN datacenter installations where the customer has no router.

If the customer might have a router, a /48 is the best and safest default choice and shorter should be possible with reasonable justification.


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