The IESG has approved the following document: - 'A Non-Queue-Building Per-Hop Behavior (NQB PHB) for Differentiated Services' (draft-ietf-tsvwg-nqb-33.txt) as Proposed Standard
This document is the product of the Transport and Services Working Group. The IESG contact persons are Gorry Fairhurst and Mike Bishop. A URL of this Internet-Draft is: https://datatracker.ietf.org/doc/draft-ietf-tsvwg-nqb/ Technical Summary This document specifies characteristics of a Non-Queue-Building Per- Hop Behavior (NQB PHB). The NQB PHB provides a shallow-buffered, best-effort service as a complement to a Default deep-buffered best- effort service for Internet services. The purpose of this NQB PHB is to provide a separate queue that enables smooth (i.e. non-bursty), low-data-rate, application-limited traffic microflows, which would ordinarily share a queue with bursty and capacity-seeking traffic, to avoid the latency, latency variation and loss caused by such traffic. This PHB is implemented without prioritization and can be implemented without rate policing, making it suitable for environments where the use of these features is restricted. The NQB PHB has been developed primarily for use by access network segments, where queuing delays and queuing loss caused by Queue-Building protocols are manifested, but its use is not limited to such segments. In particular, applications to cable broadband links, Wi-Fi links, and mobile network radio and core segments are discussed. This document recommends a specific Differentiated Services Code Point (DSCP) to identify Non-Queue-Building microflows, and updates the RFC8325 guidance on mapping Diffserv to IEEE 802.11 for this codepoint. Working Group Summary There was broad agreement on developing this work within the TSVWG working group. This document defines a new PHB and allocates a recommended DSCP for this PHB. The choice of allocated DSCP was considered by the WG over many meetings and there was rough consensus on the use of the chosen DS codepoint. A consensus call on the final text was issued in 2024-10-22 with only one remaining objection to the DSCP chosen. Document Quality To complete this work, the WG evaluated candidate DSCPs and agreed to allocate a DSCP, as well as detailed analysis to determine the conditioning required and assess the expected path to deployment. The document has been reviewed in several rounds by the WG, and multiple WGLCs for publication on the Standards Track. The document received detailed shepherd reviews after the second and final call. Personnel The Document Shepherd for this document is Zaheduzzaman Sarker. The Responsible Area Director is Gorry Fairhurst. _______________________________________________ IETF-Announce mailing list -- [email protected] To unsubscribe send an email to [email protected]
