> A /128 breaks IPv6 Privacy Addresses (RFC3041). Every device > needs a /64 > to allow this mechanism to be used. > > Bob
Alternative mechanisms could permit interface IDs to be shorter than 64 bits, for example 48 bits or far fewer than that. Interface IDs only need to be unique within a given subnet, and subnets with long prefixes could be small enough to make the uniqueness requirement easy to achieve. And also resolve the privacy concern in RFC 3041, by not creating interface IDs that are likely to be globally unique? If we're quibbling about conserving address space by assigning 56 vs 48 bit prefixes to individual sites, imagine how much more flexibility and savings could be achieved by allowing shorter interface IDs. Without imposing the restriction in RFC 3513 Section 4, and without increasing privacy concerns. No? Bert -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
