P802.1ASdm – Hot Standby
This amendment specifies protocols, procedures, and managed objects for hot standby without use of the Best Master Clock Algorithm (BMCA), for time-aware systems, including:
- A function that transforms the synchronized times of two generalized Precision Time Protocol (gPTP) domains into one synchronized time for use by applications;
- A function that directs the synchronized time of one gPTP domain into a different gPTP domain; and
- Mechanisms that determine whether a gPTP domain has sufficient quality to be used for hot standby.
This amendment also addresses errors and omissions in the description of existing functionality.
Current Status
| Status | Task Group ballot |
| Current Draft | D0.3 (1 Sep 2021) |
| PAR & CSD | Full title: Draft Standard for Local and Metropolitan Area Networks: Timing and Synchronization for Time-Sensitive Applications — Amendment: Hot Standby PAR (Approved: 03 Jun 2020; Expires: 31 Dec 2024) CSD |
| Editor | Geoffrey Garner |
| Web page | Craig Gunther |
Archive
| Date | Document |
|---|---|
| 15 Mar 2021 | P802.1ASdm, Draft 0.2 (with line numbers) |
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 |
|---|---|
| 02 Nov 2020 | Initial Plans and Assumptions for 802.1ASdm (dm-garner-plans-1120-v00.pdf) |
| 09 Mar 2020 | 4 domains (dm-cummings-as-4-domains-0320-v04.pdf) |
| 18 Feb 2020 | Multiple domains (dm-potts-as-hot-standby-multiple-domains-0220-v01.pdf) |
| 16 Jan 2020 | 802.1AS Hot Standby Amendment: Scope Discussion (new-cummings-as-hot-standby-scope-0120-v02.pdf) |
The above list includes only the latest version of updated documents and omits those superseded by subsequent discussion or inclusion in the current draft (see filenames beginning “dm-” in the 2020 or 2021 public directories for a complete list).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 Craig Gunther if you have comments to this page.