= Сообщение: 3403 из 7440 ============================================= IPV6 = От : Michiel van der Vlist 2:280/5555 14 Aug 16 22:49:51 Кому : Björn Felten 14 Aug 16 22:49:51 Тема : Giving out too generous IPv6 addresses FGHI : area://IPV6?msgid=2:280/5555+57b0e1ed На : area://IPV6?msgid=2:203/2+57b08748 = Кодировка сообщения определена как: CP850 ================================== Ответ: area://IPV6?msgid=2:310/31+57b86522 ============================================================================== Hello Björn,
On Sunday August 14 2016 16:59, you wrote to Markus Reschke:
MR>> Cheapskates :)
BF> Or The History Repeats itself.
No, not really.
BF> Didn't "they" award some major US companies and such an entire IPv4 BF> /16 address range back then, or do I remember incorrectly?
You remember wrong. In the early days some big US companies got a /8. Or 1/256 of the entire IPv4 adddress space.
BF> Now, a /56 IPv6 range is far from enough to give every citizen on BF> this planet it's individual IPv6 range.
You are guilty of "IPv4 think". Forget any comparison with IPv4. The IPv6 address space is really very very large. Wate is only relevant when there is a shortage. With IPv6 thereis no shortage and there will never be. By the time we run out of IPv6 address space, the sun will have turned into a red dwarf and it won't matter any more.
BF> And a /64 range can only cover half of the Earth's population.
Not at all. A /64 range is MUCH bigger than the IPv4 address space. It is the IPv4 range squared. The IPv4 address range is 2^32 or approximately 4x10^9. A /64 is 2^64 or approximately 1.6 x 10^19.
If we give every household a /56, we can serve 2^56 or 7x10^16 households.
If we give every household a /48 we can serve 2^48 or 2.8x10^14 households.
No, we are not giving out IPv6 address space too generous. Even in the worst case scenario, the IPv6 address space will survive the earth.
BF> So something like a /96 individually and a /80 to each of the BF> providers
Will there ever be 2^80 or 10^^24 providers?
BF> would probably be more realistic, no?
No. IPv6 was designed with a /64 being the smallest subnet. It needs that for SLAAC to work. Seen through IPv4 glasses this may seem a terrible waste. But you have to forget IPv4. Waste is only relevant when there is shortage.
In my back yard there is a berch tree. Earlier this year it discharged its load of pollen. I estimate a million times a million pollen were discharged. Of these only a tiny fraction lands on a berch "flower" where it can produce a seed. My estimate is that on the order of a milliard seeds were produced. And this happens every year. To keep the poulation stable onl ONE of al those seeds needs to become an adult tree. What a waste. But it works for nature.
