[address-policy-wg] Interpretation of IPv6 PI Policy

Dear colleagues,

I am currently handling an end-user request for, initially, a /47 PI
(now, due to the NCC stating that a /47 is, generally, not possible,
even if routing reasons exist, a /48). During that discussion the NCC
shared further details concerning the interpretation of RIPE-738, which
I believe may be useful information to share, also in the context of
possible ways to improve the address policy for the NCC region.

Specifically:

- The NCC reads "The minimum size of the assignment is a /48." as the
minimum pertaining to the minimal value of the prefix size and not 'the
minimum total size of an assignment in the number of IP addresses.'
However, it deems it possible that multiple separate /48 can be
assigned.

=> This means that a revision of the IPv6 policy will have to also
clarify this point, i.e., by rephrasing it to 'the longest prefix size
for an assignment is a /48'

- The NCC reads "Assignments larger than a /48 (shorter prefix) or
additional assignments exceeding a total of a /48 must be based on
address usage or because different routing requirements exist for
additional assignments." to mean that larger assignments can only be
made based on address usage. Routing requirements can only justify
multiple /48.

=> If this should be clarified, removing the text saying 'for
additional assignments.' should suffice.

- The NCC reads the reference to Section 5.4.2 in 'The considerations
of "5.4.2. Assignments shorter than a /48 to a single End-Site" must be
followed if needed.' to imply authoritative language codifying the
assignment to a single end-site, and not a reference to a different
section requiring the analogous application of the concepts in this
section to a PI assignment.

=> A way to clarify that might be to only reference sections by, e.g.,
"Section 5.4.2", to ensure that the referenced title of a section is
not understood as authoritative language. 

With best regards,
Tobias

-- 
Dr.-Ing. Tobias Fiebig
T +31 616 80 98 99
M tobias at fiebig.nl