关于IPv6的这句话是指哪条规定？

Question

“为此，您需要从您的 ISP 获取 IPv6 地址。从技术上讲，这可能是一个/128前缀（正好是一个 IPv6 地址），但根据规定，它至少需要是一个/64前缀。”

来自OpenWRT 维基

他们指的是什么规定？（所以如果我需要在时机成熟时为自己辩护，我将能够指出一些东西）

Answer 1

它可能指的是RFC 6177。

  A key principle for address management is that end sites always be
  able to obtain a reasonable amount of address space for their
  actual and planned usage, and over time ranges specified in years
  rather than just months.  In practice, that means at least one
  /64, and in most cases significantly more.  One particular
  situation that must be avoided is having an end site feel
  compelled to use IPv6-to-IPv6 Network Address Translation or other
  burdensome address conservation techniques because it could not
  get sufficient address space.