More to the point, what would a individual household do with Avogadro's number worth of IPv6 addresses (2^80 = 1.2x10^24)? This seems extremely wasteful. Further, a reasonable sized ISP with a couple of million customers would require a /28 or more just for their residential customer base. This sounds like a prescription for address exhaustion.
Best Regards, Jeffrey Dunn Info Systems Eng., Lead MITRE Corporation. (301) 448-6965 (mobile) -----Original Message----- From: Alexandru Petrescu [mailto:[EMAIL PROTECTED] Sent: Wednesday, October 01, 2008 8:55 AM To: [EMAIL PROTECTED] Cc: Dunn, Jeffrey H.; ipv6@ietf.org; [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; Sherman, Kurt T.; [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; Martin, Cynthia E. Subject: Re: what problem is solved by proscribing non-64 bit prefixes? [EMAIL PROTECTED] wrote: >> In a typical IPv6 ADSL household landscape... >> >> An ADSL IPv6 operational deployment offers a /64 prefix at home. >> With that, I can't subnet _and_ use IPv6 stateless >> auto-configuration. > > In a typical IPv6 ADSL household landscape the ISP will assign you a > /48 with plenty of subnetting space. Not sure, FWIW, in the IPv6 ADSL household I live in gives me a /64 and not /48 (see draft-despres-v6ops-6rd-ipv6-rapid-deployment-01.txt). That's typical for me but I don't know about the other deployed IPv6 ADSL, do they give /64 or shorter prefixes? Alex > In some regions there will be some ISPs who will only assign a /56 to > residential sites, but that still gives you a reasonable amount of > subnetting ability. Under RIR rules, an ISP can justify giving you a > /48 if you ask them for it. > > --Michael Dillon > > ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
