Hi, On Thu, Feb 27, 2025 at 12:14:52PM +0100, Angela Dall'Ara wrote: > RIPE policy proposal 2024-02, "IPv6 Initial Allocations /28 " is now > available for discussion again.?????? > > This proposal aims to change the initial IPv6 allocation size from /29 to > /28.
I still see no compelling need for this change, as I do not think the
obsession with nibbles is justified - network admins will have to deal
with odd bit sizes anyway, so pretending we can hide this by making the
default allocation a /28 is, well, not convincing me.
That said, I *do* support the proposal, just to spite ARIN with their
silly "we restrict ISPs to a /36 unless they pay more for a /32" policy.
IPv6 policy is about enabling IPv6 deployment, and not about introducing
artificial shortage - and the numbers are pretty clear that giving
a /28 to every RIPE NCC member ("a few ten thousands") is not putting
undue pressure on the v6 address space at large. That said, it's
reasonable to have safeguards to prevent stockpiling based on perceived
benefits of having multiple prefixes, all extended to /28s.
It's been mentioned that we seem to be at this point again and again
(/35 to /32, /32 to /29, now /29 to /28), always argueing "another bit
won't harm" and that being a slippery slope - so, yes, whenever we come
here again and discuss "shouldn't we increase this to /27? or maybe /24?"
we need to stare hard at the numbers, and also at the reasoning why
ISPs would need larger blocks. OTOH, we've been at this for some 25
years now, so we do have a better understanding on block sizes, number
of LIRs, global dynamics, etc.
(We as a LIR won't benefit from this proposal, though... our /35 came from
a /29 reservation, so we can only ever grow this to a /28 if we manage to
convince the other LIR in that /28 to transfer their half to us, which
they are not very likely to do :-) - we don't need the space anyway, we're
happy with the /32 we now have, and have never needed to extend it to a /29)
Gert Doering
-- IPv6 old fart
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