RE: FW: updates to IPv6 over PPP spec.

["Barany, Pete" <pbarany at qualcomm.com>]

Agreed. I can take a stab at writing some text and forward it to the
editor off-line. I wouldn't imagine that it would be more than a few
sentences/one or two paragraphs. Thanks.

-Pete

-----Original Message-----
From: Pekka Savola [mailto:pekkas@netcore.fi] 
Sent: Thursday, February 12, 2004 10:33 PM
To: Barany, Pete
Cc: ipv6@ietf.org
Subject: Re: FW: updates to IPv6 over PPP spec.

On Thu, 12 Feb 2004, Barany, Pete wrote:
> I forgot to mention where this is explicitly stated. In TIA-835-C,
> Section 3.2.1.4.2 "IPv6 Addressing":
> 
> --->BEGIN
> For an IPv6 MS, the PDSN shall be the default router and the PPP
> termination point. The PDSN shall allocate one globally unique /64
> prefix to each PPP link. The PDSN shall not construct any global
address
> from this prefix.
> --->END

Right -- but as PPPv6 is used in other scopes than 3GPP and 3GPP2 as 
well, PPP specification should probably include some discussion of the 
assumptions required for disabling DAD.

> -----Original Message-----
> From: Barany, Pete 
> Sent: Thursday, February 12, 2004 7:46 AM
> To: 'Pekka Savola'
> Cc: Karim El-Malki (HF/EAB); ipv6@ietf.org
> Subject: RE: updates to IPv6 over PPP spec.
> 
> The PDSN in cdma2000 does not have a global unicast address for the
PPP
> connection between itself and the mobile. It only has a link-local
> address. The mobile has both a link-local and global unicast address.
> 
> Pete
> 
> -----Original Message-----
> From: ipv6-admin@ietf.org [mailto:ipv6-admin@ietf.org] On Behalf Of
> Pekka Savola
> Sent: Wednesday, February 11, 2004 8:15 PM
> To: Barany, Pete
> Cc: Karim El-Malki (HF/EAB); ipv6@ietf.org
> Subject: RE: updates to IPv6 over PPP spec.
> 
> On Wed, 11 Feb 2004, Barany, Pete wrote:
> > The rationale also fails to account for 3GPP2 networks (cdma2000).
> Here,
> > PPP (IPV6CP) is used to obtain an IPv6 address for the mobile (or
the
> > MIPv6 CoA for the mobile). UMTS uses a PDP context instead.
> > 
> > Since 3GPP2 has mandated a restriction that the /64 prefix
advertised
> to
> > a mobile by a PDSN (similar to 'GGSN' if you are a UMTS-only person)
> be
> > unique/exclusive to that PPP link, then there is no need for the
> > suggested update #1 below. In fact, quite the contrary.
> 
> Umm.. but doesn't the access router which terminates the PPP link also
> have an address from that /64 prefix (e.g., ::1) -- or does it have a
> link-local address only?
> 
> In case such an assumption is made, it should be spelled out clearly 
> enough.
> 
> 

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings


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