While a single network gets at /64, isn't the practice suppose to be providers allocating a /56 or a /60 for home users (you know so your IOT, wired lan, wifi, guest network, gaming systems, bathroom, bedroom, etc. can all be on their own networks)?
----------------------------------------------------------------------------------------------- -ITG (ITechGeek) | i...@itechgeek.com <https://itg.nu/> https://keybase.io/itechgeek | https://itg.nu/ Google Voice: +1-703-493-0128 / Twitter: ITechGeek / Facebook: http://fb.me/Jbwa.Net On Mon, Dec 18, 2017 at 6:09 PM, William Herrin <b...@herrin.us> wrote: > On Sun, Dec 17, 2017 at 11:31 PM, Eric Kuhnke <eric.kuh...@gmail.com> > wrote: > > > some fun examples of the size of ipv6: > > > > https://samsclass.info/ipv6/exhaustion-2016.htm > > > > https://www.reddit.com/r/theydidthemath/comments/ > > 2qxgxw/self_just_how_big_is_ipv6/ > > > Hi Eric, > > Lies, damn lies and statistics. Both projections assume that IPv6 addresses > are assigned the same way we assign IPv4 addresses. They are not. > > There are several practices which consume IPv6 at a drastically higher rate > than IPv4. The most notable is the assignment of a /64 to every LAN. Your > /26 LAN that used to consume 2^6th IP addresses? Now it's 2^64th. Used to > consume RFC1918 addresses? Now it's 2^64th of the global IPv6 addresses. > > Why did we need a /64 for each LAN? So we could incorporate the Ethernet > MAC address in to the IP address. Only we can't actually do that because it > turns out to be crazy insecure. Nevertheless, the 3 computers in your > basement will still consume 2^64th IPv6 addresses between them. But hey, > what's 20 orders of magnitude between friends. > > We have ISPs that have received allocations of entire /19s. A /19 in IPv6 > is exactly the same percentage of the total address space as a /19 in IPv4. > Before considering reserved addresses, it's 1/2^19th of the total address > space. For a single ISP. Think about it. > > Meanwhile the IETF has learned nothing from the gargantuan waste that is > 224.0.0.0/4 ($2billion at current prices). They went and assigned > FC00::/7. > /7!! Almost 1% of the IPv6 address space gone in a single RFC. > > I haven't attempted to compute the actual rate of IPv6 consumption but it's > not inconceivable that we could exhaust them by the end of the century > through sheer ineptitude. > > On the plus side, we're mostly only screwing around with 2000::/3 right > now. After we burn through that in the next 20 years, we can if we so > desire change the rules for how (and how quickly) we use 4000::/3. > > Regards, > Bill Herrin > > -- > William Herrin ................ her...@dirtside.com b...@herrin.us > Dirtside Systems ......... Web: <http://www.dirtside.com/> >