Talk:IPv6/Archives/2020

Address Space Size
The article states 7.9×10^28 times the IPv4 allocation but also claims that this number differs from the 2^128 theoretical address space because much of the space is reserved. These numbers don't seem to add up. The first number is approximately 2^96. IPv4 has an allocation of 2^32 (also less reserved numbers). 2^96 times the size of 2^32 = 2^128, so this number is saying nothing different to the 2^128 claim.

If the claim is meant to read that total global unicast routing is 2^96 addresses, that would be in line with current allocation, more or less, but is not the total available as the allocation was larger before and could be again. RFC 3513 allocates the whole of 2000::/3 to unicast addressing, although this was later obsoleted by RFC 4291. Yet RFC 4291 does not clearly bring us to 296, nor does it prevent the allocation expanding again in the future, so it is not clear to me what we are counting here.

Also does this even belong in the lead? The lead needs to be a short summary of the article. Numbers can be discussed in the article but this number does not summarise anything obvious. I would just delete it, but it may be I am missing something here. -- Sirfurboy (talk) 17:45, 31 December 2019 (UTC)


 * Agreed. That sentence can be deleted. Ttwaring (talk) 18:40, 31 December 2019 (UTC)


 * ✅ Noting for anyone else reviewing this talk page that Sirfurboy made this change in January 2020. (For what it’s worth, I think it was a good change.) - Dyork (talk) 01:16, 8 March 2020 (UTC)