802.1Qdt – Priority-based Flow Control Enhancements
This amendment specifies procedures and managed objects for automated Priority-based Flow Control (PFC) headroom calculation and Media Access Control Security (MACsec) protection of PFC frames, using the existing Precision Time Protocol (PTP) and enhancements to the Data Center Bridging Capability Exchange protocol (DCBX).
This amendment places emphasis on the requirements for low latency and lossless transmission in large-scale and geographically dispersed data centers.
This amendment also addresses errors of the existing IEEE Std 802.1Q functionality.
Current Status
| Status | Editor’s draft |
| Current Draft | D0.2 (15 Sep 2022) |
| PAR & CSD | Full title: Draft Standard for Local and Metropolitan Area Networks: Bridges and Bridged Networks — Amendment: Priority-based Flow Control Enhancements PAR (Approved: 13 May 2022; Expires: 31 Dec 2026) CSD |
| Editor | Lily Lv |
Archive
| Date | Document |
|---|---|
| 15 Sep 2022 | P802.1Qdt, Draft 0.2 |
| 13 Sep 2022 | P802.1Qdt, Draft 0.0 |
The above list includes only the latest version of (proposed) dispositions. See the project folder for a complete list). The dates listed are the website file dates; they may differ from the creation dates in the documents.
Contributions
Important NOTICE on contributions.
| Date | Document |
|---|---|
| 17 May 2023 | Headroom Measurement Protocol Design |
| 14 Mar 2023 | PFC round trip timing protocol |
| 13 Mar 2023 | Headroom Measurement Protocol Design |
| 14 Feb 2023 | Headroom Measurement Protocol Design |
| 18 Jan 2023 | Headroom Measurement Protocol Design |
| 18 Jan 2023 | Qdt PAR&CSD Modification |
| 17 Jan 2023 | PFC management objects |
| 10 Nov 2022 | P802.1Qdt Status Update and New Proposal Discussion |
| 27 Oct 2022 | P802.1Qdt Status Update and New Proposal Discussion |
| 10 Jul 2022 | PFC Enhancements Discussion – PFC Management |
| 14 Nov 2021 | Recap of Headroom and Enhancements Project Proposal |
| 23 Sep 2021 | PFC Headroom and Enhancements Project Proposal |
| 02 Jul 2021 | PFC Headroom Measurement and Calculation Project Proposal |
| 21 Jun 2021 | Adaptive PFC Headroom and PTP |
| 08 Mar 2021 | Adaptive PFC Headroom |
The above list includes only the latest version of updated documents and omits those superseded by subsequent discussion or inclusion in the current draft (see filenames beginning “dt-” in the 2023 public directories for a complete list). The dates listed are the website file dates; they may differ from the creation dates in the documents.
Please contact the Editor if you have comments to this page.