RE: what problem is solved by proscribing non-64 bit prefixes?

[<michael.dillon at bt.com>]

> 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. 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

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