I would argue that it is not needed for 6rd as you can pack things much denser with proper 6rd parameter management. Yes it requires the ISP to think about how a DHCP pool is configured. Even one parameter set per /8 you have addresses in drastically reduce the size needed. 6rd can be packed as densely as you would do with IPv4 pools using GUAs.
-- Mark Andrews > On 28 Jun 2024, at 04:49, William Herrin <b...@herrin.us> wrote: > > On Thu, Jun 27, 2024 at 11:27 AM John Santos <j...@egh.com> wrote: >> I don't know the use case, and I don't >> think anyone else here does or if they do, they haven't described it. > > I don't know the use case that was documented for the /16 allocation, > but I know of a straightforward use case which I believe fully > compliant with ARIN policy, justifies an IPv6 /16 and is utterly > divorced from anything resembling efficient use. > > My use case is simple: I want to assign the IETF recommended /48 > prefixes to my customers, I want to use 6rd to reach them and I don't > want to map the IPv4 address space directly in to 6rd without > narrowing it to my various IPv4 allocations. > > Presto. I need 32 bits to map the v4 address space into 6rd and I want > each to lead to a /48, so I need /48-32 = a /16. > > Indeed, I could even justify a /12 if ARIN allowed it since I don't > want my native IPv6 use to overlap 6rd. > > I cannot stress enough how wasteful this plan is, but it is > technically compliant with justifiable use under current IPv6 policy. > > Regards, > Bill Herrin > > > > -- > William Herrin > b...@herrin.us > https://bill.herrin.us/ > _______________________________________________ > ARIN-PPML > You are receiving this message because you are subscribed to > the ARIN Public Policy Mailing List (ARIN-PPML@arin.net). > Unsubscribe or manage your mailing list subscription at: > https://lists.arin.net/mailman/listinfo/arin-ppml > Please contact i...@arin.net if you experience any issues. _______________________________________________ ARIN-PPML You are receiving this message because you are subscribed to the ARIN Public Policy Mailing List (ARIN-PPML@arin.net). Unsubscribe or manage your mailing list subscription at: https://lists.arin.net/mailman/listinfo/arin-ppml Please contact i...@arin.net if you experience any issues.