RFC 9332 on Dual-Queue Coupled Active Queue Management (AQM) for Low Latency, Low Loss, and Scalable Throughput (L4S)
rfc-editor@rfc-editor.org Fri, 20 January 2023 05:11 UTC
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Subject: RFC 9332 on Dual-Queue Coupled Active Queue Management (AQM) for Low Latency, Low Loss, and Scalable Throughput (L4S)
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A new Request for Comments is now available in online RFC libraries.
RFC 9332
Title: Dual-Queue Coupled Active Queue Management (AQM) for
Low Latency, Low Loss, and Scalable Throughput (L4S)
Author: K. De Schepper,
B. Briscoe, Ed.,
G. White
Status: Experimental
Stream: IETF
Date: January 2023
Mailbox: koen.de_schepper@nokia.com,
ietf@bobbriscoe.net,
g.white@cablelabs.com
Pages: 52
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-tsvwg-aqm-dualq-coupled-25.txt
URL: https://www.rfc-editor.org/info/rfc9332
DOI: 10.17487/RFC9332
This specification defines a framework for coupling the Active Queue
Management (AQM) algorithms in two queues intended for flows with
different responses to congestion. This provides a way for the
Internet to transition from the scaling problems of standard
TCP-Reno-friendly ('Classic') congestion controls to the family of
'Scalable' congestion controls. These are designed for consistently
very low queuing latency, very low congestion loss, and scaling of
per-flow throughput by using Explicit Congestion Notification (ECN)
in a modified way. Until the Coupled Dual Queue (DualQ), these
Scalable L4S congestion controls could only be deployed where a
clean-slate environment could be arranged, such as in private data
centres.
This specification first explains how a Coupled DualQ works. It then
gives the normative requirements that are necessary for it to work
well. All this is independent of which two AQMs are used, but
pseudocode examples of specific AQMs are given in appendices.
This document is a product of the Transport Area Working Group Working Group of the IETF.
EXPERIMENTAL: This memo defines an Experimental Protocol for the
Internet community. It does not specify an Internet standard of any
kind. Discussion and suggestions for improvement are requested.
Distribution of this memo is unlimited.
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