RE: Request to Advance "Default Address Selection for IPv6"

[Richard Draves]

Title: Message

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.

 

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?

 

Thanks,

Rich

-----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
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