RFC - 1323

TCP Extensions for High Performance

Original:	ftp://ftp.isi.edu/in-notes/rfc1323.txt
Authors:	V. Jacobson [LBL], R. Braden [ISI], D. Borman [Cray Research]
Date:	May 1992
Category:	Proposed Standard

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Obsoletes:
RFC-1185	TCP Extension for High-Speed Paths (Obsoleted by RFC-1323prop)
RFC-1072	TCP extensions for long-delay paths (Obsoleted by RFC-1323prop, RFC-2018prop)

Referred by:	71 RFC
Refers to:	8 RFC

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Status

This RFC specifies an IAB standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "IAB Official Protocol Standards" for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Abstract

This memo presents a set of TCP extensions to improve performance over large bandwidth*delay product paths and to provide reliable operation over very high-speed paths. It defines new TCP options for scaled windows and timestamps, which are designed to provide compatible interworking with TCP's that do not implement the extensions. The timestamps are used for two distinct mechanisms: RTTM (Round Trip Time Measurement) and PAWS (Protect Against Wrapped Sequences). Selective acknowledgments are not included in this memo.

This memo combines and supersedes RFC-1072(-> 2018^prop | 1323^prop) and RFC-1185(-> 1323^prop), adding additional clarification and more detailed specification. Appendix C summarizes the changes from the earlier RFCs.

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