Re: [Int-area] Revving draft-intarea-shared-addressing-issues

> -----Original Message-----
> From: Templin, Fred L [mailto:Fred.L.Templin@boeing.com] 
> Sent: Monday, June 14, 2010 12:40 PM
> To: Dan Wing; 'Dave Thaler'; 'Matthew Ford'
> Cc: int-area@ietf.org; 'Brian E Carpenter'; 
> draft-ford-shared-addressing-issues@tools.ietf.org; 'Lorenzo Colitti'
> Subject: RE: [Int-area] Revving draft-intarea-shared-addressing-issues
> 
> > Enabling 6to4 behind a NAT causes a disconnected IPv6 island.
> 
> s/NAT/proto-41 filtering firewall/

True.  However this document is discussing IP address sharing 
(not firewalls, nor all of other failures of IPv6-over-IPv4
tunneling.)

-d

> Fred
> fred.l.templin@boeing.com
> 
> > -----Original Message-----
> > From: int-area-bounces@ietf.org 
> [mailto:int-area-bounces@ietf.org] On Behalf Of Dan Wing
> > Sent: Monday, June 14, 2010 12:17 PM
> > To: 'Dave Thaler'; 'Matthew Ford'
> > Cc: int-area@ietf.org; 'Brian E Carpenter'; 
> draft-ford-shared-addressing-issues@tools.ietf.org;
> > 'Lorenzo Colitti'
> > Subject: Re: [Int-area] Revving 
> draft-intarea-shared-addressing-issues
> > 
> > > -----Original Message-----
> > > From: Dave Thaler [mailto:dthaler@microsoft.com]
> > > Sent: Monday, June 14, 2010 12:05 PM
> > > To: Dan Wing; 'Matthew Ford'
> > > Cc: int-area@ietf.org; 'Brian E Carpenter';
> > > draft-ford-shared-addressing-issues@tools.ietf.org; 
> 'Lorenzo Colitti'
> > > Subject: RE: [Int-area] Revving 
> draft-intarea-shared-addressing-issues
> > >
> > > > Some routers enable 6to4 [RFC3056] on their WAN link.  6to4
> > > requires a
> > > > publicly-routable IPv4 address.  Enabling 6to4 behind a 
> NAT causes a
> > > > disconnected IPv6 island."
> > >
> > > The last sentence above is incorrect.  The second 
> sentence is correct.
> > > So one cannot "enable" 6to4 behind a NAT since one has no
> > > publically-routable IPv4 address.  Hence one does not get an IPv6
> > > island.  One gets no IPv6 at all (from 6to4 anyway).
> > 
> > I was attempting to summarize the problem that has been 
> ascribed to Apple's
> > Airport Extreme routers turning on 6to4, which is mentioned 
> in many threads on
> > the Internet including
> > http://www.ops.ietf.org/lists/v6ops/v6ops.2008/msg00263.html
> > 
> > If there is more accurate wording, I'm all for it.  I would like
> > some discussion of CPE (and hosts) blindly enabling 6to4 causing
> > problems when the CPE's IPv4 WAN address is shared.
> > 
> > -d
> > 
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