[ppml] Policy Proposal 2006-7: Changes to IPv6initialallocation criteria - revised text

michael.dillon at bt.com michael.dillon at bt.com
Thu Feb 22 05:22:47 EST 2007

> Quick question. Are those addresses being advertised to 
> Internet ? If not,
> you could use ULA-central ?

There is no such thing. Google shows me that ULA-central is something
that was described in an IETF draft which has since expired. Expired
draft documents are meaningless as far as ARIN policy is concerned.

On the other hand, RFC 2050 is an IETF Best Practice document that is
the foundation of the entire RIR system. In section 3 "Assignment
Framework" it explicitly states:
 In order for the Internet to scale using existing technologies, use
 of regional registry services should be limited to the assignment of
 IP addresses for organizations meeting one or more of the following

 a)  the organization has no intention of connecting to
     the Internet-either now or in the future-but it still
     requires a globally unique IP address.  The organization
     should consider using reserved addresses from RFC1918.
     If it is determined this is not possible, they can be
     issued unique (if not Internet routable) IP addresses.

The reference to RFC 1918 is for private networks, i.e. networks that
are under one single administrative control and will never interconnect
with another network. It is also an IPv4 specific concept so it does not
apply to IPv6.

--Michael Dillon

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