RE: Why /64

FWIW.
I'm working for the #1CPE vendor, managed CPEs that is, and I can confirm that majority of our customers ( ISP's/Telco's) is handing out a /60 or /56.  It's very rare, although they exist, to only see /64s handed out to the (residential) CPE.
Some do add ia_na to it to number the WAN interface, it's an exception to see slaac on wan to number wan intf these days @ our customers, although it is being used.

WRT privacy etc
Some of our customers re-apply the IPv4 approach on handing out IPv6 pds, i.e. with IPv4, they renewed the public IPv4 address every XX hours and re-apply this to ia_pd.  Whether or not this is/was for economics rather than privacy purposes (more charged for static IPv4 @ some customers, but these being more business than residential customers) is another question of course.

Regs
Carl

-----Original Message-----
From: ipv6-bounces@ietf.org [mailto:ipv6-bounces@ietf.org] On Behalf Of Mark ZZZ Smith
Sent: zondag 27 oktober 2013 21:44
To: Lorenzo Colitti; Jeroen Massar
Cc: <ipv6@ietf.org>
Subject: Re: Why /64

<snip>
>
>Specifically, I think the "quite a few [ISPs] give exactly 1 IPv6 address to their users" statement is not true in the case of mainstream residential ISPs - I think they all provide at least a /64, and more usually at least a /60.
>

During their IPv6 trial, Internode gave out /60s. When they deployed production residential broadband IPv6 in 2011 (which I worked on), the provided a dynamic /64 to the CPE via SLAAC (which allows direct connection of a PC as an alternative to using a CPE), and a static /56 via DHCPv6-PD. They fairly recently said they now have 10% of their customers using IPv6, as they've been enabling it by default on all new customer connections and providing IPv6 enabled CPE with it. Going by the published customer numbers, 10% is in the order of 16 000 to 18 000 services with native IPv6 connectivity.

http://www.internode.on.net/news/2013/06/309.php

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