I've posted a draft on assigning random site-local identifiers at
http://www.aciri.org/francis/draft-francis-ipngwg-unique-site-local-00.txt.
This was submitted in time to make the Minn. ID deadline.
Thanks,
PF
Abstract
For many or most sites, site-local addresses are used for packets
between nodes within the site. The fact that site-local addresses
are not globally unique makes their usage and administration more
difficult than they would be if there were globally unique (or
nearly globally unique). For instance, before two sites can be
merged, one of them has to be renumbered. The meaning of site-local
addresses becomes ambiguous when they are taken out of the immediate
context of the IPv6 layer, for instance when they are conveyed in
email or stored in text files.
All other things being equal, it would be preferable if the prefix
of addresses with site-local scope were as globally unique as
possible. This draft expands the format of the site-local address
to allow them to be near-unique. It does not, however, change the
definition or usage of the site-local address. This draft describes
the format and assignment method of near-unique site-local prefixes.
It also outlines some usage scenarios.
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