Re: [Detnet] [spring] Comments on draft-saad-mpls-miad-usecases

[Greg Mirsky <[e-mail]>]

Hi Haoyu,
I am sorry, but after reading your note, I cannot find an answer to my
question How the MIAD work is applicable to the informational RFC 8596? In
other words, What do you see as missing in the solution described in RFC
8596 that MIAD is expected to address?

Regards,
Greg

On Fri, Feb 25, 2022 at 11:34 AM Haoyu Song <[e-mail]>
wrote:

> Hi Greg,
>
>
>
> There have been some existing standards (e.g., EL and this one) and
> proposals (some are listed in the document) with each dealing with a
> specific use case. I think it’s beneficial to list them all and then
> consider to use a generic mechanism to handle all these otherwise piecemeal
> solutions. Of course, finally we would need to pick which shall actually be
> supported with the generic method, but at this point, we shall not limit
> ourself.
>
>
>
> Regards,
>
> Haoyu
>
>
>
> *From:* Greg Mirsky <[e-mail]>
> *Sent:* Friday, February 25, 2022 9:54 AM
> *To:* Haoyu Song <[e-mail]>
> *Cc:* Tarek Saad <[e-mail]>; mpls <[e-mail]>;
> [e-mail]; DetNet WG <[e-mail]>; spring <[e-mail]>;
> [e-mail]
> *Subject:* Re: [spring] Comments on draft-saad-mpls-miad-usecases
>
>
>
> Hi Haoyu,
>
> in RFC 8596 I don't find anything that would require any modification to
> the existing MPLS architecture. I would agree that SFC NSH using MPLS to
> connect SFP components might benefit from the new enhancements to the MPLS,
> but so would any other client that uses the MPLS network. Do you think that
> the use case document should list them all?
>
>
>
> Regards,
>
> Greg
>
>
>
> On Fri, Feb 25, 2022 at 9:42 AM Haoyu Song <[e-mail]>
> wrote:
>
>
>    - in my earlier comments, I've noted that the informational RFC 8596
>    appears not posing any requirements for enhancements in the MPLS data
>    plane. If I am missing something, please let me know.
>
> Hi Greg,
>
>
>
> The RFC is mentioned because it shows that SFC NSH has been considered to
> be supported in MPLS as well, so it’s a legitimate use case like the others
> in the draft. When we need to support multiple such use cases at the same
> time, we need a generic mechanism to support them, so the use-case draft
> serves as a motivation for our work in the ODT.
>
> Hopefully this answers your question. Thanks,
>
> Haoyu
>
>
>
> *From:* Greg Mirsky <[e-mail]>
> *Sent:* Thursday, February 24, 2022 5:09 PM
> *To:* Tarek Saad <[e-mail]>
> *Cc:* mpls <[e-mail]>; [e-mail]; DetNet WG <[e-mail]>;
> spring <[e-mail]>; [e-mail]
> *Subject:* Re: [spring] Comments on draft-saad-mpls-miad-usecases
>
>
>
> Hi Tarek,
>
> thank you for your thoughtful consideration of my comments. I've reviewed
> the diff and got several follow-up notes:
>
>    - the new text in the Introduction section explains the ISD as being
>    encoded as labels:
>
> within the label stack, e.g., encoded as labels, referred to as In
>
>                  Stack Data (ISD), and
>
> I think s/as labels/into label stack elements/ makes the text a bit more
> accurate. What do you think?
>
>
>    - in my earlier comments, I've noted that the informational RFC 8596
>    appears not posing any requirements for enhancements in the MPLS data
>    plane. If I am missing something, please let me know.
>    - I might have missed it earlier. The TSN is the term used for a very
>    specific technology developed at IEEE to support, for example, URLLC
>    services. The DetNet WG defines the methodology in support of these
>    services using IETF technologies - MPLS and IP. I think it would be
>    appropriate if an IETF document refers to Deterministic Networking, not
>    TSN. What is your opinion?
>
> Regards,
>
> Greg
>
>
>
>
>
> On Thu, Feb 24, 2022 at 5:52 AM Tarek Saad <[e-mail]> wrote:
>
> Hi Greg,
>
>
>
> Thanks for your comments. I’ve addressed several of your comments. The
> latest diffs (revision to be uploaded soon) can be found at:
>
>
> https://tools.ietf.org//rfcdiff?url1=https://www.ietf.org/archive/id/draft-saad-mpls-miad-usecases-00.txt&url2=https://raw.githubusercontent.com/tsaad-dev/drafts/master/miad-usecases/draft-dt-mpls-miad-usecases.txt
> <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftools.ietf.org%2Frfcdiff%3Furl1%3Dhttps%3A%2F%2Fwww.ietf.org%2Farchive%2Fid%2Fdraft-saad-mpls-miad-usecases-00.txt%26url2%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Ftsaad-dev%2Fdrafts%2Fmaster%2Fmiad-usecases%2Fdraft-dt-mpls-miad-usecases.txt&data=04%7C01%7Chaoyu.song%40futurewei.com%7C98e5a6f0e02545303be608d9f887e5ee%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637814084842706350%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=OWEI89B3BQGMJLu%2Fb4HmOSMGNZwSIqC74cwyX0oD4Rs%3D&reserved=0>
>
>
>
> Regards,
>
> Tarek (for co-authors)
>
>
>
> *From: *spring <[e-mail]> on behalf of Greg Mirsky <
> [e-mail]>
> *Date: *Friday, February 18, 2022 at 4:15 PM
> *To: *[e-mail] <
> [e-mail]>, mpls <[e-mail]>,
> [e-mail] <[e-mail]>, DetNet WG <[e-mail]>, spring <
> [e-mail]>
> *Subject: *[spring] Comments on draft-saad-mpls-miad-usecases
>
> Dear Authors,
>
> thank you for your work putting this document together. It helps to
> analyze essential use cases in the scope of the work at the Open DT.
> Attached, please find a copy of the draft with my notes and some
> editorial suggestions. I hope you'll find some of them helpful.
>
> I am looking forward to your feedback and questions.
>
>
>
> Regards,
>
> Greg
>
>