networks with intermittent connectivity might be a valid case for use of site-locals, though giving such networks a non-routable global prefix would cause fewer problems for applications.
also, you're correct that when using 6to4 with dialup v4 providers the prefix is likely change each time the network is connected (unless special arrangements have been made with the ISP), however this does not necessarily hold for native v6 connectivity. with v6 there is not as much need to reuse addresses for dialup lines. IMHO the decision to recommend address reuse on dialup lines should be reexamined for v6. it's not reasonable to assume that v6 applications will cope with rapid prefix changes. the problem with the idea that site-locals should be favored over globals is that this is exactly the wrong rule for some applications and on some networks. as far as I can tell, address selection rules need to be derived from a combination of application requirements and local network policy. Keith -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
