Hello all.
Recently I have been reading some content about IPv4 exhaustion in order
to understand better the problematic and I am also working on some
policy proposal drafts and wanted to do a consultation to the community
that perhaps have knowledge about some of the points I would like to
ask. It is about some Legacy Resources, how they stand and what may or
not happen with them in the context of IPv4 exhaustion for the coming years.
It is public knowledge the efforts made in the past for some legacy
resource holders to hand it back to the community so RIRs could fairly
distribute these resources to those who have real usage for them. There
has been some success in it and some holders actually did it like
Interop, DoD, BBN, Standford University and others.
A while back when I first asked the question of why some holders which
clearly didn't have usage for most of the IP space refused to return
them back to IANA the explanation was kind of "acquired rights" which is
kind of or partially understandable.
1) However two things that calls my attention are for example a) some
private companies that are not in the telecom/internet industry holding
a entire /8 and b) the amount of /8's assigned only to DoD (to the best
of my knowledge 13 of them). I find it pretty hard for a private
company, even with global presence be able to justify a entire /8 if
they are not in the telecom/internet industry, including DoD, specially
from some years ago when the IPv4 exhaustion came to discussion and the
mechanisms that exists in order to make better usage of each single IPv4
address.
Question is: what were the results of these conversations with them and
what were they justification to keep all these /8's at the time ?
2) With regards DoD prefixes specifically as mentioned there has been
some movements to return some of the space back and that has been done,
but I couldn't identify exactly which ones were them. Looking at IANA
IPv4 assignments website I can see some of them designated directly to
DoD themselves and others appear as "Administered by ARIN". So what is
the exact difference between them and to those Administered by ARIN does
it mean in any way that part of that space is not necessarily used by
the designated entity.
Note: My points are intended to understand better the exhaustion problem
and find out better what has been happening with legacy resources given
that many are still probably very underutilized. I don't really want to
get back things like "IPv4 is over, deploy IPv6" or that these type of
discussions delay IPv6 deployments. I can assure I do my share in
implementing IPv6 everywhere I have some responsibility. The point is is
simply to understand the legacy resources situation and what will happen
with them in the coming years within this context.
Many thanks and Best Regards
Fernando
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