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RFC 8985: The RACK-TLP Loss Detection Algorithm for TCP

In plain English — editorial summary, not part of the RFC

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

Document record

Document ID
RFC8985
Published
February 2021
Authors
Y. Cheng; N. Cardwell; N. Dukkipati; P. Jha
Status
PROPOSED STANDARD
Stream
IETF
Area
wit
Pages
29
Also known as
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