On 27.6.2015 2.49, Juliusz Chroboczek wrote:
" If the considered delegated prefix is an IPv6 prefix, and whenever
there is at least one available prefix of length 64, a prefix of
length 64 MUST be selected unless configured otherwise by an
administrator. In case no prefix of length 64 would be available, a
longer prefix MAY be selected."
Well spotted, thanks. Markus, would you be open to relaxing the MUST,
and adding a guideline about which of the available /64s is suitable
for carving up?
I reworded the current text as such, as I consider it sane:
If the considered delegated prefix is an IPv6 prefix, and whenever
there is at least one available prefix of length 64, a prefix of
length 64 MUST be selected unless configured otherwise. In case no
prefix of length 64 would be available, a longer prefix MAY be
selected even without configuration.
It does not exactly say _what_ configuration (whether provided by
administrator, or some other process such as autonomic stuff); but by
default, HNCP implementation MUST use /64.
Obviously, this may not be the final word if my coauthors step in or
someone provides better language to describe the intent. I do not think
SHOULD is good idea when describing the non-configured default which
99+% of home routers should be doing.
Cheers,
-Markus
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