802.1AS-2025-Revision – Timing and Synchronization for Time-Sensitive Applications
This standard specifies protocols, procedures, and managed objects used to ensure that the synchronization requirements are met for time-sensitive applications, such as audio, video, and time-sensitive control, across networks, for example, IEEE 802 and similar media. This includes the maintenance of synchronized time during normal operation and following addition, removal, or failure of network components and network reconfiguration. It specifies the use of IEEE 1588™ specifications where applicable in the context of IEEE Std 802.1Q™. Synchronization to an externally provided timing signal [e.g., a recognized timing standard such as Coordinated Universal Time (UTC) or International Atomic Time (TAI)] is not part of this standard but is not precluded.
This is a maintenance roll-up of IEEE Std 802.1AS-2025 with the amendments IEEE Std 802.1ASed and IEEE Std 802.1ASds. Depending on their progress to approval, other amendments and corrigenda in progress may also be included.
Current Status
| Status | Task Group ballot |
| Current Draft | D0.3 |
| PAR | Full title: Standard for Local and Metropolitan Area Networks–Timing and Synchronization for Time-Sensitive Applications PAR (Approved: May 15, 2026; Expires: Dec 31, 2030 ) |
| Editor | Silvana Rodrigues |
Archive
| Date | Document |
|---|---|
| September 2026 | Final Disposition of TG Ballot Comments on D0.2 |
| August 2026 | Final Disposition of TG Ballot Comments on D0.1 |
| June 2026 | D0.1 draft |
The above list includes only the latest version of 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 |
|---|---|
| September 2026 | 802.1AS-2025-rev-D0.2 Editor’s Report for TG Ballot – v01 |
| September 2026 | Relation between IEEE P802.1AS and IEEE Std 802.3 PHY delay – Part III |
| September 2026 | Considerations for IEEE 802.3 PHY Delays in gPTP |
| September 2026 | P802.1AS-2025-Rev: syncGrandMasterIdentity and syncStepsRemoved propagation |
| September 2026 | Compatibility for Ethernet (FDE) between versions of this Standard |
| August2026 | Relation between IEEE P802.1AS and IEEE Std 802.3 PHY delay – Part II |
| August 2026 | 802.1AS-2025-rev-D0.1 Editor’s Report for initial TG Ballot – v02 |
| August 2026 | P802.1AS-2025-Rev: Refactoring MD clauses discussion |
| May 2026 | Relation between IEEE P802.1AS and IEEE Std 802.3 PHY delay |
Please contact the Editor or the Maintenance Task Group Chair if you have comments on the 802.1AS-2020-Rev page.