> When managing such a scheme alongside an IPv6 prefix which > needs to be assigned to the same set of servers, which are > all dual-stack, the *number* of prefixes, their *relative* > numbering, and the host *addresses* within the prefixes, it > is quickly apparent that use of only /64 prefixes makes for a > management nightmare, particularly if renumbering of prefixes > and/or servers occurs, e.g. re-balancing the VLSM arrangement > itself in IPv4-land.
Given that in IPv6, you can justify allocating a /48 to each separate site, which gives you 16 bits to mirror the IPv4 subnet hierarchy, while maintaining 64 bit interface sddresses, I don't see a technical issue here. And I would really recommend that you upgrade all of your management systems to fully support IPv6 instead of relying on tricks like generating an IPv6 address by applying a transform to an existing IPv4 address. Then you have no technical issue at all. --Michael Dillon -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
