> I just took another look at RFC 2765. I believe that for SIIT to work,
> when an IPv6-only node sends to an IPv4-mapped address (so it is sending
> an IPv6 packet with an IPv4-mapped source address, as opposed to using the
> IPv4-mapped address in the API and sending an IPv4 packet), then it must
> use an IPv4-translatable source address. Anything else will just not work
> when the packet gets to the SIIT box.
>
> So to my mind, this feels more like a section 3 requirement. It's not a
> matter of the IPv6-only node *preferring* to use an IPv4-translatable
> source address. Instead, if there is no IPv4-translatable source address
> available, then the IPv6-only node should *fail* to send to the
> IPv4-mapped destination address.
>
=> I see, so section 3 is ok then. But just for my understanding
are you saying that in this case you would basically bypass
the src address selection rules ?
>
> But I don't understand Erik's comment that this only applies to nodes that
> implement SIIT. Why does it not apply to all IPv6-only nodes sitting
> behind a SIIT box?
>
=> I thought that if an IPv6-only node gets an IPv4-mapped
address for the dst node then it must use an IPv4-translatable
IPv6 src address.
If the network does not support SIIT then it must not return
an IPv4-mapped address to the IPv6 node (in the DNS reply
....etc). This seems to be inline with what you say above.
But I don't know if this requirement on IPv4-mapped addresses
is mentioned anywhere, for example is there anything
in NAT-PT that disallows the use of a mapped address
for the NAT-PT box ? I think that should be disallowed
to avoid confusion in the end hosts.
I hope this helps.
Thanks,
Hesham
> -----Original Message-----
> From: Hesham Soliman (EPA) [mailto:[EMAIL PROTECTED]]
> Sent: Sunday, October 07, 2001 7:35 PM
> To: Richard Draves
> Cc: [EMAIL PROTECTED]
> Subject: RE: Request to Advance "Default Address Selection for IPv6"
>
>
>
>
> Oops, I missed your comment when doing 06.
> I'm not sure I understand it correctly.
> Are you suggesting another paragraph in section 3?
>
> => I guess you could add something in section 3,
> but it should also be obvious in one of the rules.
> So to explain my comment better, the rule would
> specify that if the dst address is an IPv4-mapped
> IPv6 address, and the node is an IPv6-only node
> then the src address selected should be an IPv4-translated
> IPv6 address.
>
> As Erik mentioned in the mail I included below, we would
> have
> to add a comment specifynig that this is for nodes
> that implement SIIT to avoid confusion.
> I'm sorry if I didn't include other comments but I couldn't find
> any other responses. If someone else commented please
> restate your comment.
>
> Does that make sense ?
>
> Thanks,
> Hesham.
>
> -----Original Message-----
> From: Hesham Soliman (EPA) [
> <mailto:[EMAIL PROTECTED]>]
> Sent: Tuesday, October 02, 2001 6:16 PM
> To: [EMAIL PROTECTED]
> Cc: Richard Draves
> Subject: RE: Request to Advance "Default Address Selection for IPv6"
>
>
>
> Hi,
> I'm resending this mail, I think it's still applicable to
> the latest version. This was sent after the Seattle
> meeting.
> Hesham
> -----Original Message-----
> From: Erik Nordmark [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, 5 June 2001 12:23
> To: Hesham Soliman (ERA)
> Cc: [EMAIL PROTECTED]
> Subject: RE: W.G. Last Call on "Default Address Selection for
>
> IPv6"
> > Rich,
> >
> > Based on our private discussion in Seattle, think it would
> > be useful to add a sending rule for mapped addresses
> > as follows:
> >
> > - If the destination address is an IPv4-mapped IPv6 address, and
> > - If the host is an IPv6-only host
> > the source address MUST be an IPv6-translated address.
> I think this makes sense as long as we preface it very clearly with
> Nodes that implement SIIT (does not apply to other nodes)
> ...
> Without that preface adding these rules will do nothing but adding
> confusion.
> Erik
> -----Original Message-----
> From: Hesham Soliman (ERA) [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, 5 June 2001 8:40
> To: [EMAIL PROTECTED]
> Subject: RE: W.G. Last Call on "Default Address Selection for
>
> IPv6"
> Rich,
> Based on our private discussion in Seattle, think it would
> be useful to add a sending rule for mapped addresses
> as follows:
> - If the destination address is an IPv4-mapped IPv6 address, and
> - If the host is an IPv6-only host
> the source address MUST be an IPv6-translated address.
> Comments ?
> Hesham
>
>
> -----Original Message-----
> From: Bob Hinden [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, 2 October 2001 9:46
> To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> Subject: Request to Advance "Default Address Selection for
> IPv6"
> Erik, Thomas,
> The chairs of the IP Next Generation working group, on behalf of the
>
> working group, request that the following document be published as a
>
> Proposed Standard:
> Title : Default Address Selection for IPv6
> Author(s) : R. Draves
> Filename :
> draft-ietf-ipngwg-default-addr-select-06.txt
> Pages : 22
> Date : 28-Sep-01
> A working group last call for this document was completed on June 7,
>
> 2001. The "-06" draft was produced in response to comments made
> during
> the
> w.g. last call and subsequent discussion. The document was
> discussed at
>
> the London IETF and the w.g. agreed advancing it to Proposed
> Standard
> once
> the new draft was published.
> Bob Hinden / Steve Deering
> IPng Working Group Co-Chairs
> --------------------------------------------------------------------
>
> IETF IPng Working Group Mailing List
> IPng Home Page:
> <http://playground.sun.com/ipng>
> FTP archive:
> <ftp://playground.sun.com/pub/ipng>
> Direct all administrative requests to [EMAIL PROTECTED]
> --------------------------------------------------------------------
>
>
--------------------------------------------------------------------
IETF IPng Working Group Mailing List
IPng Home Page: http://playground.sun.com/ipng
FTP archive: ftp://playground.sun.com/pub/ipng
Direct all administrative requests to [EMAIL PROTECTED]
--------------------------------------------------------------------
