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Status:

PROPOSED STANDARD

Authors:

Y. Cheng
N. Cardwell
N. Dukkipati
P. Jha

Stream:

IETF

Source:

tcpm (wit)

Cite this RFC:TXT  | XML  |  BibTeX

DOI:  https://doi.org/10.17487/RFC8985

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Abstract

This document presents the RACK-TLP loss detection algorithm for TCP.RACK-TLP uses per-segment transmit timestamps and selectiveacknowledgments (SACKs) and has two parts. Recent Acknowledgment(RACK) starts fast recovery quickly using time-based inferencesderived from acknowledgment (ACK) feedback, and Tail Loss Probe (TLP)leverages RACK and sends a probe packet to trigger ACK feedback toavoid retransmission timeout (RTO) events. Compared to the widelyused duplicate acknowledgment (DupAck) threshold approach, RACK-TLPdetects losses more efficiently when there are application-limitedflights of data, lost retransmissions, or data packet reorderingevents. It is intended to be an alternative to the DupAck thresholdapproach.

For the definition ofStatus,seeRFC 2026.

For the definition ofStream, seeRFC 8729.