I understand that there might have been some poor choices made with IPv6
in regard to address allocation that might lead to a future exhaust. The
main one is the 64 bit network and 64 bit host decision, considering that
it was based on 48 bit ethernet OUI's. I think it should have been 80 bits
of network and 48 bits of host instead. Even in the largest of networks,
48 bits is clearly overkill. Having the current /64 is clearly excessive.
Other decisions like giving every node a /48 also add to the greater
possibility of exhaust at some future time. Many players have already
decided to assign less than a /48 to their customers by default.
However, unlike the situation of IPv4, there is still plenty of time to
correct this. Currently only 1/16 of the address space is currently used
for global addresses. When it comes time to assign the next 1/16 of
space, we could always tighten up the standards, leading to vastly more
addresses being available per 1/16 block. Adoption of an 80/48 split by
existing players would vastly expand their holdings. Also, adoption of
only providing a /48 upon request and defaulting to /56 or /60 can also
vastly expand holdings as well.
We still have plenty of time while only 1/16 of the address space is being
used to address being more conservative in the future.
Does anyone know what is the utilization rate of 2000::/3 is or where this
data is being tracked?
Albert Erdmann
Network Administrator
Paradise On Line Inc.
On Sat, 4 Jan 2020, Ronald F. Guilmette wrote:
In message <alpine.lrh.2.21.2001031911040....@bigone.uneedus.com>,
hostmas...@uneedus.com wrote:
[IPv6] also brings RIR's
back to their original record keeping role, without having to police the
number of addresses that a member needs.
I am not persuaded that this will be the case. When IPv4 was first
promulgated, I do believe that just about everyone felt that there
was no way in hell that "the Internet" such as it was, or such as it
might become, could ever use up 4 billion addresses. Now admittedly,
things -are- rather different with IPv6, where the number of addreses
is a lot closer to the number of elementary particles in the Universe,
but I do think it is unwise to ever assume that there are any practical
limits on man's ability and/or willingness to waste stuff. In other
words, I think that some amount of thoughtful husbandry of the resource
will always be needed.
Regards,
rfg
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