Browse Prior Art Database

Increasing TCP's Initial Window (RFC3390)

IP.com Disclosure Number: IPCOM000010155D
Original Publication Date: 2002-Oct-01
Included in the Prior Art Database: 2002-Oct-29
Document File: 16 page(s) / 36K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Allman: AUTHOR [+3]

Abstract

This document specifies an optional standard for TCP to increase the permitted initial window from one or two segment(s) to roughly 4K bytes, replacing RFC 2414. It discusses the advantages and disadvantages of the higher initial window, and includes discussion of experiments and simulations showing that the higher initial window does not lead to congestion collapse. Finally, this document provides guidance on implementation issues.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 8% of the total text.

Network Working Group� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � M. Allman

Request for Comments: 3390� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � BBN/NASA GRC

Obsoletes: 2414� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � S. Floyd

Updates: 2581� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � ICIR

Category: Standards Track� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � C. Partridge

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � BBN Technologies

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � October 2002

� � � � � � � � � � � � � � � � � � � Increasing TCP's Initial Window

Status of this Memo

� � This document specifies an Internet standards track protocol for the

� � Internet community, and requests discussion and suggestions for

� � improvements.� Please refer to the current edition of the "Internet

� � Official Protocol Standards" (STD 1) for the standardization state

� � and status of this protocol.� Distribution of this memo is unlimited.

Copyright Notice

� � Copyright (C) The Internet Society (2002).� All Rights Reserved.

Abstract

� � This document specifies an optional standard for TCP to increase the

� � permitted initial window from one or two segment(s) to roughly 4K

� � bytes, replacing RFC 2414.� It discusses the advantages and

� � disadvantages of the higher initial window, and includes discussion

� � of experiments and simulations showing that the higher initial window

� � does not lead to congestion collapse.� Finally, this document

� � provides guidance on implementation issues.

Terminology

� � The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",

� � "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this

� � document are to be interpreted as described in RFC 2119 [RFC2119].

1.� TCP Modification

� � This document obsoletes [RFC2414] and updates [RFC2581] and specifies

� � an increase in the permitted upper bound for TCP's initial window

� � from one or two segment(s) to between two and four segments.� In most

� � cases, this change results in an upper bound on the initial window of

� � roughly 4K bytes (although given a large segment size, the permitted

� � initial window of two segments may be significantly larger than 4K

� � bytes).

Allman, et. al.� � � � � � � � � � � � Standards Track� � � � � � � � � � � � � � � � � � � � [Page 1]

RFC 3390� � � � � � � � � � � Increasing TCP's Initial Window� � � � � � � � October 2002

� � The upper bound for the initial window is given more precisely in

� � (1):

� � � � � � � � min (4*MSS, max (2*MSS, 4380 bytes))� � � � � � � � � � � � � � � � � � � � � � � (1)

� � Note: Sending a 1500 byte packet indicates a maximum segment size

� � (MSS) of 1460...