Ars Technica on IPv4 exhaustion

Ricky Beam jfbeam at
Thu Jun 19 20:57:40 UTC 2014

On Thu, 19 Jun 2014 12:21:12 -0400, Justin M. Streiner  
<streiner at> wrote:
> How much IPv6 space would you propose an ISP provisions for each of its  
> residential users?

A single /64 would, currently, be sufficient for 99% of households. The  
link can be /128, /127, /64, whatever -- between ISP and CPE doesn't  
matter to the customer. (maybe to their equipment)  As this is being done  
via DHCPv6-PD, it's a simple matter to ask for more space (typically /60)  
in the rare cases the customer needs it.  And in a decade when 16 LANs  
isn't enough, allow /56's.

If it weren't for stupid SLAAC and it's nanolathed-in-diamond prefix===64  
requirement, we could start out - day one - with more reasonable sizes.  
Give everyone their own entire internet (::/96) to carve up as they wish.  
It's not like anything even on the whiteboard today can handle a fraction  
of that many devices in a single LAN.

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