On 18 April 2018 the ARIN Advisory Council (AC) accepted "ARIN-prop-254:
Clarification on IPv6 Sub-Assignments" as a Draft Policy.
Draft Policy ARIN-2018-4 is below and can be found at:
https://www.arin.net/policy/proposals/2018_4.html
You are encouraged to discuss all Draft Policies on PPML. The AC will
evaluate the discussion in order to assess the conformance of this draft
policy with ARIN's Principles of Internet number resource policy as
stated in the Policy Development Process (PDP). Specifically, these
principles are:
* Enabling Fair and Impartial Number Resource Administration
* Technically Sound
* Supported by the Community
The PDP can be found at:
https://www.arin.net/policy/pdp.html
Draft Policies and Proposals under discussion can be found at:
https://www.arin.net/policy/proposals/index.html
Regards,
Sean Hopkins
Policy Analyst
American Registry for Internet Numbers (ARIN)
Draft Policy ARIN-2018-4: Clarification on IPv6 Sub-Assignments
Problem Statement:
When the policy was drafted, the concept of assignments/sub-assignments
did not consider a practice very common in IPv4 which is replicated and
even amplified in IPv6: the use of IP addresses for point-to-point links
or VPNs.
In the case of IPv6, instead of unique addresses, the use of unique
prefixes (/64) is increasingly common.
Likewise, the policy failed to consider the use of IP addresses in
hotspots, or the use of IP addresses by guests or employees in Bring
Your Own Device (BYOD) and many other similar cases.
Finally, the IETF has recently approved the use of a unique /64 prefix
per interface/host (RFC8273) instead of a unique address. This, for
example, allows users to connect to a hotspot, receive a /64 such that
they are “isolated” from other users (for reasons of security,
regulatory requirements, etc.) and they can also use multiple virtual
machines on their devices with a unique address for each one (within the
same /64).
Section 2.5 (Definitions/Allocate and Assign), explicitly prohibits such
assignments, stating that “Assignments... are not to be sub-assigned to
other parties”.
This proposal clarifies this situation in this regard and better define
the concept, particularly considering new uses of IPv6 (RFC8273), by
means of a new paragraph.
5. Policy Statement
Actual Text
• Assign - To assign means to delegate address space to an ISP or
end-user, for specific use within the Internet infrastructure they
operate. Assignments must only be made for specific purposes documented
by specific organizations and are not to be sub-assigned to other parties.
New Text
• Assign - To assign means to delegate address space to an ISP or
end-user, for specific use within the Internet infrastructure they
operate. Assignments must only be made for specific purposes documented
by specific organizations and are not to be sub-assigned to other parties.
The fact that a unique address or even a unique /64 prefix is
non-permanently provided to third parties, on a link operated by the
original receiver of the assignment, shall not be considered a
sub-assignment. This includes, for example, guests or employees (devices
or servers), hotspots, and point-to-point links or VPNs. The provision
of addressing for permanent connectivity or broadband services is still
considered a sub-assignment. Only the addressing of the point-to-point
link itself can be permanent and that addressing can't be used (neither
directly or indirectly) for the actual communication.
6. Comments
a. Timetable for implementation:
Immediate
b. Anything else:
Situation in other regions: This situation, has already been corrected
in RIPE, and the policy was updated in a similar way, even if right now
there is a small discrepancy between the policy text that reached
consensus and the RIPE NCC Impact Analysis. A new policy proposal has
been submitted to amend that, and the text is the same as presented by
this proposal at ARIN. Same text has also been submitted to AfriNIC,
LACNIC and APNIC.
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