Everything comes at some cost. Small sites will be able to get PA from their providers. The 'cost' will be renumbering if they change providers.
With ULA-C the cost will be in administration. ULA-C will have the same administrative load as PI and PA space, so I don't understand why the cost would be cheaper. In fact if ULA-C is announcable via DNS the aggregate cost of managing many small allocation blocks at the root DNS servers will be higher than managing the relatively fewer large blocks of PI/PA, so in reality ULA-C costs should be the same or greater. The issue is not cost per IP address but cost per database entry. > -----Original Message----- > From: Templin, Fred L [mailto:[EMAIL PROTECTED] > Sent: Wednesday, June 27, 2007 12:19 PM > To: Jeroen Massar; Leo Vegoda > Cc: ipv6@ietf.org; Brian E Carpenter; Pekka Savola > Subject: RE: ULA and WAN-routability > > > In effect one can indeed also use ULA-C kind of addresses as > > "Identifiers" as they are truly globally unique just like > PI, but that > > is the whole point why ULA-C is futile: they _are_ just like PI ;) > > Except that they will be carved out of a special prefix and > handled in > > a strange way. Also as they are not "Internet addresses" > but intended > > for disconnected sites and thus should never traverse the Internet > > except for in a VPN in the first place. > > Also except that they are attainable by very small sites at a > (presumably) nominal cost. (Plus, the "except for in a VPN" > is likely to be good enough for the kinds of connections > ULA-C sites will want to make.) > > Fred > [EMAIL PROTECTED] > > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > ipv6@ietf.org > Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- > -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
