Arnt Gulbrandsen wrote:
Hallam-Baker, Phillip writes:
I don't see how such an architectural limitation can be enforced. There is no way that the IETF can prevent an ISP issuing IPv6 customers a /128 if they choose.
Not directly, but there's the indirect route: a) IETF designs IPv6 autoconfiguration. b) Linksys, D-Link, Netgear and friends make boxes that support autoconfiguration. c) ISP hand out /128s. d) Autoconfiguration doesn't work well. e) Customers call ISP support. f) ISP loses $$$. g) ISP starts issuing /48s instead.
I don't know the first thing about how IPv6 autoconfiguration works. It worked very well in my previous office. Will it work better when the router has a /48 at hand than a /64 or /128?
Arnt
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I remember working with my own little lan: three Site Local and one tunnel networks. radvd or SuSE 7.1 and SuSE 8.2 did expect /64 The tunnel would either give me a /64 without local router or a /48 if I had a local router. Today Site Local is given up. So I changed to 192.168... addresses with 6to4 addressing. RFC 2462 says we normally have EUI-64 addressing that is either a funtion of the MAC address or a random number. With EUI-64 (64 bits) the prefix must be /64 for an autoconfigured network segment. The tunnel used to be a /124 network segment overlapping my /64 with ..0 the net, ..1 the other end of the tunnel, ..2 me and ..3 broadcast. Theoretically ..2 would have been a router for anything in my /64, but that never worked. So practically I ended up with a /128 If you have a LAN with servers you need predictable addresses for your servers. Renumbering is not an option. Site Local does not exist any longer. 182.168.. with 6to4 addressing is the only way I see. But that means - no autoconfiguration. Without autoconfiguration /124 and NAT is good enough for me. But how about my aunt with her laptop? Kind regards Peter and Karin -- Peter and Karin Dambier Cesidian Root - Radice Cesidiana Rimbacher Strasse 16 D-69509 Moerlenbach-Bonsweiher +49(6209)795-816 (Telekom) +49(6252)750-308 (VoIP: sipgate.de) mail: peter@peter-dambier.de mail: peter@echnaton.arl.pirates http://iason.site.voila.fr/ https://sourceforge.net/projects/iason/ http://www.cesidianroot.com/