P802.1CBec – Sequence Recovery Function Refinements and Parameter Configuration

This amendment refines the sequence recovery function and adds an informative annex describing recommended values for the sequence recovery function parameters, and provides guidance regarding frame buffering in relay and end systems to assist in the usage of Frame Replication and Elimination for Reliability. This amendment also includes technical and editorial corrections in the description of existing IEEE Std 802.1CB functionality.

Current Status

Status	PAR approved
Current Draft	Draft 0.2
PAR & CSD	Full title: Draft Standard for Local and Metropolitan Area Networks: Frame Replication and Elimination for Reliability Amendment: Sequence Recovery Function Refinements and Parameter Configuration PAR (Approved: 2025-02-13; Expires: 2029-12-31) CSD
Editor	Lisa Maile

Archive

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
2026-09-16	802.1CBec FRER Sequence Recovery State Diagrams
2026-09-15	– CBec Discussion Summary / Progress Update – September 2026 Plenary – State Machines of the modified SeqGen and SeqRcvy (update) – Pseudocode update in 802.1CB-2017 format
2026-07-13	– RESET of SeqRcvy – State Machines of the modified SeqGen and SeqRcvy – Pseudocode for Sequence Generation and Vector Recovery
2026-06-29	802.1CBec FRER Vector Recovery – Combined Proposal – Details
2026-05-12	– P802.1CBec FRER Analysis + Solutions – Discussion Summary May 2026 Interim – 802.1CBec FRER Sequence Recovery – Combined Proposal – Graphics
2025-11- 12	Overview of known issues for IEEE 802.1CB FRER and next steps
2025-05-22	Illustrations for Comment Disposition for 1st Task Group Ballot on P802.1CBec/D0.1
2025-04-07	P802.1CBec Text Contribution – Lisa Maile
2024-07-16	Informative Annex Project Proposal for IEEE Std 802.1CB Sequence Recovery Function Parameter Configuration
2024-06-24	Informative Annex Project Proposal for IEEE Std 802.1CB Sequence Recovery Function Parameter Configuration
2023-06-05	Ensuring Reliable and Predictable Behavior of IEEE 802.1CB Frame Replication and Elimination

The above list includes only the latest version of updated documents and omits those superseded by subsequent discussion or inclusion in the current draft.

Please contact the Editor if you have comments to this page.