Personally I and Wes both dislike using NAT for IPv6 since IPv6
doesn't call for it. We will have to leave it to the Service
Provider(s)(SP) to comment on the cost model. Personally I prefer
the SP dole out a PD. The PD doling out from SP may have a hiccup or
two depending upon who you talk to at IETF but in general the
deployment is expected to work. We have personally tested such PD
delegation to a embedded router in a cable modem where the router
modem was given a PD from DHCPv6 server that lies in SP domain. This
was some quick code we developed. The modem obtained an IA_NA for
its cable interface and obtained a IA_PD for it's LAN interface.
Then the PD was sub-delegated to SLAAC hosts behind the modem. RIPv6
was used between the modem and cable aggregator to inject routes
from modem to the CMTS aggregator. We also tested IPv6 multicast
clients in such a deployment.
Anyhow, indeed, even we do not want to debate such issues of one
address vs. PD, or things like if a PC needs to be given an IA_PD or
not. Our job is to produce a good document that works for, at least,
both cable and DSL, and then any network like FIOS.
Hemant
-----Original Message-----
From: owner-v6ops@ops.ietf.org [mailto:owner-v6ops@ops.ietf.org] On
Behalf Of Rémi Denis-Courmont
Sent: Thursday, July 03, 2008 2:52 PM
To: EricLKlein@softhome.net
Cc: Shin Miyakawa; v6ops@ops.ietf.org
Subject: Re: new draft on IPv6 CPE router available for review
Le jeudi 3 juillet 2008 21:05:37 EricLKlein@softhome.net, vous avez
écrit :
Shin Miyakawa writes:
If so, I think that people will purchase "one IPv6 global address
service for a host" and USE V6NAT to connect any device in their
home network, because probably this service will be less expensive
than "Prefix Delegated service for a routed CPE".
That's too bad.
There is no Nat in IPv6. See RFC4864 - Local Network Protection for
IPv6 for more details.
I think Shin-san's point is that if PD delegation does not work
uniformly/satisfactorily enough, CPE vendors and ISPs will deploy
IPv6 NATs rather than tell their customer "sorry you cannot access
the Internet with more than one computer at a time".
Whether that's a red herring, I will not debate here and now.
--
Rémi Denis-Courmont
http://www.remlab.net/