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By the way, I always wondered what if companies start acquiring large IPv6 space chunks, and it will become the same problem as with IPv4. For example in hand,
by deepsun 8y ago
By the way, I always wondered what if companies start acquiring large IPv6 space chunks, and it will become the same problem as with IPv4. For example in hand, if AWS bought 3.0.0.0/8, cannot they buy 03::?
And once enough companies buy huge ranges of IPv6, we would come to the same scarcity as in IPv4, no?
PS: I understand that largest CIDR block that can be allocated in IPv6 is /20, not /8. But they could buy 4096 blocks of size /20 to get the whole of /8.
- icedchai 8y agoNo, because all global unicast allocations are done out of 2000::/3 This means even if we screw up all these allocations, we have many other chances to get it right. See https://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml https://www.iana.org/assignments/ipv6-address-space/ipv6-add...
- tialaramex 8y agoYou don't just buy blocks. You get assigned them, based on evidence of need. Evidence of need for an IPv4 /8 is plausible for any large organisation, but how would you show you need an IPv6 /8? "Oh, our colonies in Orion's Belt are all expanding very quickly now so we need more space" ? Now your next question might be, hang on, if you can't buy IP addresses, how does Amazon have 3.0.0.0/8 ? Well, lots of companies can show evidence of need in IPv4 but space is exhausted - so what happens is that if somebody _else_ gives up their address space to someone who have evidence of need that's fine. And a financial inducement to give up your space to somebody else is also fine. So in a sense you _can_ buy IPv4 addresses, just you aren't allowed to buy them if you aren't going to need them. Hoarding, speculative trading, etcetera are (in principle) not a thing.