Re: [tsvwg] start of WGLC on L4S drafts

[Ermin Sakic <[e-mail]>]

Hi Wesley, all,

L4S proposals are an important step towards enabling low-latency transmissions for remote control, AR/VR, and online gaming applications.
I support progressing the drafts to RFC status.

I have attached a few comments below after re-reading the latest versions of the three drafts.
My apologies if some of the comments came up in discussion earlier.

Best wishes,
Ermin Sakic, NVIDIA

- draft-ietf-tsvwg-l4s-arch-10:
        - Figure 1: Is there a specific reason why the “mark/drop” action is not denoted for L4S queue compared to “mark”-only? Section 5.1 of draft-ietf-tsvwg-ecn-l4s-id-19 states that “…L4S marking treatment MUST begin applying drop to L4S traffic until the overload episode has subsided…”.
        - Section 8.2: “…if it is leads…” -> “…if it leads…”
- draft-ietf-tsvwg-ecn-l4s-id-19:
        - Section 1 Introduction: “…responses to them result..” -> “…responses to markings result…”
        - Section 1.1: “The explanation is summarised without the maths in the L4S architecture document” -> I suggest referencing to the specific section number of draft-ietf-tsvwg-l4s-arch here.
        - Section 7.1: “TCP. QUIC…” -> “TCP, QUIC…”
        - Appendix B: “tranport-layer” -> “transport-layer”
- draft-ietf-tsvwg-aqm-dualq-coupled-16:
        - Figure 1: As mentioned above, I’d expect to see an optional drop as the outcome of forwarding to the L traffic queue in addition to the “ECN marking” action.

-----Original Message-----
From: tsvwg <[e-mail]> On Behalf Of Wesley Eddy
Sent: Thursday, 29 July 2021 18:18
To: [e-mail]
Subject: [tsvwg] start of WGLC on L4S drafts

External email: Use caution opening links or attachments


This message is starting a combined working group last call on 3 of the L4S drafts:

- Architecture: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-tsvwg-l4s-arch%2F&amp;data=04%7C01%7Cesakic%40nvidia.com%7C911e34a8568a4c43d67c08d952ac82f5%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637631724620979753%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=a7V1lmfJi%2Fbs2H2mZIr3QhveYsPj3QzPguBFDWsy%2BC0%3D&amp;reserved=0

- DualQ:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-tsvwg-aqm-dualq-coupled%2F&amp;data=04%7C01%7Cesakic%40nvidia.com%7C911e34a8568a4c43d67c08d952ac82f5%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637631724620979753%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=PwO0BFTNKv2c4ZbGoQZEvxfLg7NIG9mw8oWtNqdwsjs%3D&amp;reserved=0

- ECN ID: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-tsvwg-ecn-l4s-id%2F&amp;data=04%7C01%7Cesakic%40nvidia.com%7C911e34a8568a4c43d67c08d952ac82f5%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637631724620979753%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=QpBxzuleCeXpxzoBR4oEJWANLk7v1Vvo%2Ft4H8d3kZz0%3D&amp;reserved=0

The WGLC will last through 4 weeks from today, and then we'll see what to do next.  Please submit any comments you have on these to the TSVWG list in that timeframe.

The chairs are considering a possible virtual interim following the close in order to work through feedback received.

The work on the L4S operational guidance draft is continuing in parallel, but that draft is not being last called yet.


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