Re: [Idr] Please discuss the use cases for draft-xie-idr-mpbgp-extention-4map6

Hi Chongfeng/Authors,

Thanks for your updates to the document.

I am still struggling to find the answer to the question on why it is
necessary to perform mapping from IPv4 to IPv6 and then back to IPv4 when
providing IPv4 connectivity service over an IPv6 core? Why is it not
sufficient to simply encapsulate the IPv4 payload into any encapsulation
(e.g., IPv4-in-IPv6, SRv6, MPLS, GRE, etc.) using RFC8950 encoding for the
IPv4 unicast/VPN SAFI. These solutions are documented
in draft-mishra-idr-v4-islands-v6-core-4pe

Perhaps I am missing something and it would help me understand the need for
such mapping by service provider PE routers.

Thanks,
Ketan

On Thu, Feb 8, 2024 at 5:14 AM Chongfeng Xie <chongfeng.xie@foxmail.com>
wrote:

>
>
> Hi Jeff,
>
> We have submitted a new version of draft-xie-idr-mpbgp-extention-4map6.
> Based on your suggestions, the contents of new attribute is placed in a new
> TLV in the tunnel encapsulation attribute of RFC9012, and the format of the
> NLRI is revised as well. In addition, the section of operation has been
> changed accordingly.
>
>
>         Name:     draft-xie-idr-mpbgp-extension-4map6
>         Revision: 09
>         Title:    MP-BGP Extension and the Procedures for IPv4/IPv6
> Mapping Advertisement
>         Date:     2024-02-09
>         Group:    idr
>         Pages:    16
>         URL:
> https://www.ietf.org/archive/id/draft-xie-idr-mpbgp-extension-4map6-09.txt
>         Status:
> https://datatracker.ietf.org/doc/draft-xie-idr-mpbgp-extension-4map6/
>         HTMLized:
> https://datatracker.ietf.org/doc/html/draft-xie-idr-mpbgp-extension-4map6
>         Diff:
> https://author-tools.ietf.org/iddiff?url2=draft-xie-idr-mpbgp-extension-4map6-09
>
> We express sincere thanks to you for reviewing the draft as WG chair and
> providing a couple of important suggestions.  We also thank idr WG for the
> comments and suggestions received so far.
>
> If you have any new comments or suggestions, please feel free to let me
> know. Thanks!
>
> Best regards
> Chongfeng
>
>
> *From:* 【外部账号】Jeffrey Haas <jhaas@pfrc.org>
> *Date:* 2024-02-05 00:02
> *To:* Chongfeng Xie <chongfeng.xie@foxmail.com>
> *CC:* Sue Hares <shares@ndzh.com>; idr <idr@ietf.org>;
> draft-xie-idr-mpbgp-extension-4map6
> <draft-xie-idr-mpbgp-extension-4map6@ietf.org>
> *Subject:* Re: [Idr] Please discuss the use cases for
> draft-xie-idr-mpbgp-extention-4map6
> Chongfeng,
>
>
> On Jan 29, 2024, at 10:38 AM, Chongfeng Xie <chongfeng.xie@foxmail.com>
> wrote:
> Based on your comment and suggestions, we have made the following
> revisions and submitted a new version,
>
>
>
> [...]
>
> If you have any further comments, please feel free to let me know.
>
>
> Your changes significantly address my operational concerns.  Thank you.
>
> -- Jeff
>
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