Overview
ISO/IEC/IEEE 8802-1Q:2020/Amd 31:2021 amends the bridged LAN/MAN standard (IEEE 802.1Q) to provide Stream Reservation Protocol (SRP) enhancements and performance improvements. Published as Amendment 31 to Part 1Q (Bridges and bridged networks), this document extends IEEE Std 802.1Q-2018 (prepared as IEEE Std 802.1Qcc) to improve the configuration and management of time‑sensitive streams in bridged networks.
Key search terms: ISO/IEC/IEEE 8802-1Q, Amendment 31, SRP, Stream Reservation Protocol, IEEE 802.1Q, Time‑Sensitive Networking (TSN), MSRP, bridged networks.
Key technical topics and requirements
- SRP enhancements: Updates to the Stream Reservation Protocol to better support registration, reservation and maintenance of time‑sensitive traffic across bridges.
- Performance improvements: Changes aimed at faster, more reliable reservation and handling of streams to reduce setup latency and improve network responsiveness.
- Configuration of time‑sensitive streams: New or refined mechanisms for configuring streams end‑to‑end across bridged topologies, aligning with TSN objectives.
- Bridges and bridged networks scope: Applies to bridged LAN/MAN environments governed by IEEE 802.1Q where stream reservation and Quality of Service are required.
- Related protocols referenced: Multiple Stream Registration Protocol (MSRP) / SRP concepts and integration points with the IEEE 802.1Q family.
Note: The amendment focuses on protocol and configuration-level enhancements; implementers should consult the full amendment text for exact normative requirements and implementation details.
Practical applications and who uses this standard
This amendment is directly relevant to professionals and organizations deploying deterministic and low-latency Ethernet networks, including:
- Network architects and engineers designing TSN-enabled local and metropolitan area networks.
- Equipment vendors (switch/bridge manufacturers) implementing SRP/MSRP features and TSN capabilities in hardware/firmware.
- System integrators and OEMs in industries requiring guaranteed latency and traffic reservation (e.g., industrial automation, professional AV, real‑time control systems).
- Test labs and certification bodies validating performance improvements and SRP behavior.
- Standards professionals and technical managers tracking IEEE/ISO/IEC updates to 802.1Q and TSN.
Related standards
- IEEE Std 802.1Q (Bridges and bridged networks)
- IEEE Std 802.1Qcc (Configuration and management extensions for SRP/TSN)
- ISO/IEC/IEEE 8802-1Q series (part of the broader IEEE 802 family)
This amendment strengthens SRP and TSN interoperability across bridged Ethernet, helping implementers deliver predictable, reserved bandwidth and improved stream setup performance in modern time‑sensitive networks.